From: Deng-Cheng Zhu <dengcheng.zhu@xxxxxxxxxx>
No logic changes inside.
Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@xxxxxxxxxx>
---
Changes:
v2 - v1:
o Don't change the opening comment mark for kernel-doc comments.
o To make long lines more readable, use local variables / macros.
o Slight format adjustments are made.
arch/mips/include/asm/kvm_host.h | 10 +-
arch/mips/include/asm/r4kcache.h | 3 +
arch/mips/kvm/kvm_locore.S | 55 +++---
arch/mips/kvm/kvm_mips.c | 179 +++++++++---------
arch/mips/kvm/kvm_mips_comm.h | 21 +-
arch/mips/kvm/kvm_mips_commpage.c | 21 +-
arch/mips/kvm/kvm_mips_dyntrans.c | 38 ++--
arch/mips/kvm/kvm_mips_emul.c | 389 +++++++++++++++++++-------------------
arch/mips/kvm/kvm_mips_int.c | 45 +++--
arch/mips/kvm/kvm_mips_int.h | 22 ++-
arch/mips/kvm/kvm_mips_opcode.h | 26 ++-
arch/mips/kvm/kvm_mips_stats.c | 18 +-
arch/mips/kvm/kvm_tlb.c | 194 +++++++++----------
arch/mips/kvm/kvm_trap_emul.c | 74 ++++----
arch/mips/kvm/trace.h | 18 +-
15 files changed, 562 insertions(+), 551 deletions(-)
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index b0aa955..3f813f2 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -359,13 +359,17 @@ enum emulation_result {
#define MIPS3_PG_FRAME 0x3fffffc0
#define VPN2_MASK 0xffffe000
-#define TLB_IS_GLOBAL(x) (((x).tlb_lo0 & MIPS3_PG_G) && \
+#define TLB_IS_GLOBAL(x) (((x).tlb_lo0 & MIPS3_PG_G) && \
((x).tlb_lo1 & MIPS3_PG_G))
#define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK)
#define TLB_ASID(x) ((x).tlb_hi & ASID_MASK)
-#define TLB_IS_VALID(x, va) (((va) & (1 << PAGE_SHIFT)) \
- ? ((x).tlb_lo1 & MIPS3_PG_V) \
+#define TLB_IS_VALID(x, va) (((va) & (1 << PAGE_SHIFT)) \
+ ? ((x).tlb_lo1 & MIPS3_PG_V) \
: ((x).tlb_lo0 & MIPS3_PG_V))
+#define TLB_HI_VPN2_HIT(x, y) ((TLB_VPN2(x) & ~(x).tlb_mask) == \
+ ((y) & VPN2_MASK & ~(x).tlb_mask))
+#define TLB_HI_ASID_HIT(x, y) (TLB_IS_GLOBAL(x) || \
+ TLB_ASID(x) == ((y) & ASID_MASK))
struct kvm_mips_tlb {
long tlb_mask;
diff --git a/arch/mips/include/asm/r4kcache.h b/arch/mips/include/asm/r4kcache.h
index 0b8bd28..4520adc 100644
--- a/arch/mips/include/asm/r4kcache.h
+++ b/arch/mips/include/asm/r4kcache.h
@@ -19,6 +19,9 @@
#include <asm/mipsmtregs.h>
#include <asm/uaccess.h> /* for segment_eq() */
+extern void (*r4k_blast_dcache)(void);
+extern void (*r4k_blast_icache)(void);
+
/*
* This macro return a properly sign-extended address suitable as base address
* for indexed cache operations. Two issues here:
diff --git a/arch/mips/kvm/kvm_locore.S b/arch/mips/kvm/kvm_locore.S
index 033ac34..d7279c0 100644
--- a/arch/mips/kvm/kvm_locore.S
+++ b/arch/mips/kvm/kvm_locore.S
@@ -16,7 +16,6 @@
#include <asm/stackframe.h>
#include <asm/asm-offsets.h>
-
#define _C_LABEL(x) x
#define MIPSX(name) mips32_ ## name
#define CALLFRAME_SIZ 32
@@ -91,7 +90,10 @@ FEXPORT(__kvm_mips_vcpu_run)
LONG_S $24, PT_R24(k1)
LONG_S $25, PT_R25(k1)
- /* XXXKYMA k0/k1 not saved, not being used if we got here through an ioctl() */
+ /*
+ * XXXKYMA k0/k1 not saved, not being used if we got here through
+ * an ioctl()
+ */
LONG_S $28, PT_R28(k1)
LONG_S $29, PT_R29(k1)
@@ -132,7 +134,10 @@ FEXPORT(__kvm_mips_vcpu_run)
/* Save the kernel gp as well */
LONG_S gp, VCPU_HOST_GP(k1)
- /* Setup status register for running the guest in UM, interrupts are disabled */
+ /*
+ * Setup status register for running the guest in UM, interrupts
+ * are disabled
+ */
li k0, (ST0_EXL | KSU_USER | ST0_BEV)
mtc0 k0, CP0_STATUS
ehb
@@ -152,7 +157,6 @@ FEXPORT(__kvm_mips_vcpu_run)
mtc0 k0, CP0_STATUS
ehb
-
/* Set Guest EPC */
LONG_L t0, VCPU_PC(k1)
mtc0 t0, CP0_EPC
@@ -165,7 +169,7 @@ FEXPORT(__kvm_mips_load_asid)
INT_ADDIU t1, k1, VCPU_GUEST_KERNEL_ASID /* (BD) */
INT_ADDIU t1, k1, VCPU_GUEST_USER_ASID /* else user */
1:
- /* t1: contains the base of the ASID array, need to get the cpu id */
+ /* t1: contains the base of the ASID array, need to get the cpu id */
LONG_L t2, TI_CPU($28) /* smp_processor_id */
INT_SLL t2, t2, 2 /* x4 */
REG_ADDU t3, t1, t2
@@ -229,9 +233,7 @@ FEXPORT(__kvm_mips_load_k0k1)
eret
VECTOR(MIPSX(exception), unknown)
-/*
- * Find out what mode we came from and jump to the proper handler.
- */
+/* Find out what mode we came from and jump to the proper handler. */
mtc0 k0, CP0_ERROREPC #01: Save guest k0
ehb #02:
@@ -239,7 +241,8 @@ VECTOR(MIPSX(exception), unknown)
INT_SRL k0, k0, 10 #03: Get rid of CPUNum
INT_SLL k0, k0, 10 #04
LONG_S k1, 0x3000(k0) #05: Save k1 @ offset 0x3000
- INT_ADDIU k0, k0, 0x2000 #06: Exception handler is installed @ offset 0x2000
+ INT_ADDIU k0, k0, 0x2000 #06: Exception handler is
+ # installed @ offset 0x2000
j k0 #07: jump to the function
nop #08: branch delay slot
VECTOR_END(MIPSX(exceptionEnd))
@@ -248,7 +251,6 @@ VECTOR_END(MIPSX(exceptionEnd))
/*
* Generic Guest exception handler. We end up here when the guest
* does something that causes a trap to kernel mode.
- *
*/
NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
/* Get the VCPU pointer from DDTATA_LO */
@@ -290,9 +292,7 @@ NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
LONG_S $30, VCPU_R30(k1)
LONG_S $31, VCPU_R31(k1)
- /* We need to save hi/lo and restore them on
- * the way out
- */
+ /* We need to save hi/lo and restore them on the way out */
mfhi t0
LONG_S t0, VCPU_HI(k1)
@@ -321,8 +321,10 @@ NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
/* Save pointer to run in s0, will be saved by the compiler */
move s0, a0
- /* Save Host level EPC, BadVaddr and Cause to VCPU, useful to
- * process the exception */
+ /*
+ * Save Host level EPC, BadVaddr and Cause to VCPU, useful to
+ * process the exception
+ */
mfc0 k0,CP0_EPC
LONG_S k0, VCPU_PC(k1)
@@ -351,7 +353,6 @@ NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
LONG_L k0, VCPU_HOST_EBASE(k1)
mtc0 k0,CP0_EBASE
-
/* Now that the new EBASE has been loaded, unset BEV and KSU_USER */
.set at
and v0, v0, ~(ST0_EXL | KSU_USER | ST0_IE)
@@ -369,7 +370,8 @@ NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
/* Saved host state */
INT_ADDIU sp, sp, -PT_SIZE
- /* XXXKYMA do we need to load the host ASID, maybe not because the
+ /*
+ * XXXKYMA do we need to load the host ASID, maybe not because the
* kernel entries are marked GLOBAL, need to verify
*/
@@ -383,9 +385,11 @@ NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
/* Jump to handler */
FEXPORT(__kvm_mips_jump_to_handler)
- /* XXXKYMA: not sure if this is safe, how large is the stack??
+ /*
+ * XXXKYMA: not sure if this is safe, how large is the stack??
* Now jump to the kvm_mips_handle_exit() to see if we can deal
- * with this in the kernel */
+ * with this in the kernel
+ */
PTR_LA t9, kvm_mips_handle_exit
jalr.hb t9
INT_ADDIU sp, sp, -CALLFRAME_SIZ /* BD Slot */
@@ -394,7 +398,8 @@ FEXPORT(__kvm_mips_jump_to_handler)
di
ehb
- /* XXXKYMA: k0/k1 could have been blown away if we processed
+ /*
+ * XXXKYMA: k0/k1 could have been blown away if we processed
* an exception while we were handling the exception from the
* guest, reload k1
*/
@@ -402,7 +407,8 @@ FEXPORT(__kvm_mips_jump_to_handler)
move k1, s1
INT_ADDIU k1, k1, VCPU_HOST_ARCH
- /* Check return value, should tell us if we are returning to the
+ /*
+ * Check return value, should tell us if we are returning to the
* host (handle I/O etc)or resuming the guest
*/
andi t0, v0, RESUME_HOST
@@ -521,8 +527,10 @@ __kvm_mips_return_to_host:
LONG_L $0, PT_R0(k1)
LONG_L $1, PT_R1(k1)
- /* r2/v0 is the return code, shift it down by 2 (arithmetic)
- * to recover the err code */
+ /*
+ * r2/v0 is the return code, shift it down by 2 (arithmetic)
+ * to recover the err code
+ */
INT_SRA k0, v0, 2
move $2, k0
@@ -566,7 +574,6 @@ __kvm_mips_return_to_host:
PTR_LI k0, 0x2000000F
mtc0 k0, CP0_HWRENA
-
/* Restore RA, which is the address we will return to */
LONG_L ra, PT_R31(k1)
j ra
diff --git a/arch/mips/kvm/kvm_mips.c b/arch/mips/kvm/kvm_mips.c
index cd5e4f5..821e7e8 100644
--- a/arch/mips/kvm/kvm_mips.c
+++ b/arch/mips/kvm/kvm_mips.c
@@ -7,7 +7,7 @@
*
* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ */
#include <linux/errno.h>
#include <linux/err.h>
@@ -31,38 +31,41 @@
#define VECTORSPACING 0x100 /* for EI/VI mode */
#endif
-#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
+#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x)
struct kvm_stats_debugfs_item debugfs_entries[] = {
- { "wait", VCPU_STAT(wait_exits) },
- { "cache", VCPU_STAT(cache_exits) },
- { "signal", VCPU_STAT(signal_exits) },
- { "interrupt", VCPU_STAT(int_exits) },
- { "cop_unsuable", VCPU_STAT(cop_unusable_exits) },
- { "tlbmod", VCPU_STAT(tlbmod_exits) },
- { "tlbmiss_ld", VCPU_STAT(tlbmiss_ld_exits) },
- { "tlbmiss_st", VCPU_STAT(tlbmiss_st_exits) },
- { "addrerr_st", VCPU_STAT(addrerr_st_exits) },
- { "addrerr_ld", VCPU_STAT(addrerr_ld_exits) },
- { "syscall", VCPU_STAT(syscall_exits) },
- { "resvd_inst", VCPU_STAT(resvd_inst_exits) },
- { "break_inst", VCPU_STAT(break_inst_exits) },
- { "flush_dcache", VCPU_STAT(flush_dcache_exits) },
- { "halt_wakeup", VCPU_STAT(halt_wakeup) },
+ { "wait", VCPU_STAT(wait_exits), KVM_STAT_VCPU },
+ { "cache", VCPU_STAT(cache_exits), KVM_STAT_VCPU },
+ { "signal", VCPU_STAT(signal_exits), KVM_STAT_VCPU },
+ { "interrupt", VCPU_STAT(int_exits), KVM_STAT_VCPU },
+ { "cop_unsuable", VCPU_STAT(cop_unusable_exits), KVM_STAT_VCPU },
+ { "tlbmod", VCPU_STAT(tlbmod_exits), KVM_STAT_VCPU },
+ { "tlbmiss_ld", VCPU_STAT(tlbmiss_ld_exits), KVM_STAT_VCPU },
+ { "tlbmiss_st", VCPU_STAT(tlbmiss_st_exits), KVM_STAT_VCPU },
+ { "addrerr_st", VCPU_STAT(addrerr_st_exits), KVM_STAT_VCPU },
+ { "addrerr_ld", VCPU_STAT(addrerr_ld_exits), KVM_STAT_VCPU },
+ { "syscall", VCPU_STAT(syscall_exits), KVM_STAT_VCPU },
+ { "resvd_inst", VCPU_STAT(resvd_inst_exits), KVM_STAT_VCPU },
+ { "break_inst", VCPU_STAT(break_inst_exits), KVM_STAT_VCPU },
+ { "flush_dcache", VCPU_STAT(flush_dcache_exits), KVM_STAT_VCPU },
+ { "halt_wakeup", VCPU_STAT(halt_wakeup), KVM_STAT_VCPU },
{NULL}
};
static int kvm_mips_reset_vcpu(struct kvm_vcpu *vcpu)
{
int i;
+
for_each_possible_cpu(i) {
vcpu->arch.guest_kernel_asid[i] = 0;
vcpu->arch.guest_user_asid[i] = 0;
}
+
return 0;
}
-/* XXXKYMA: We are simulatoring a processor that has the WII bit set in Config7, so we
- * are "runnable" if interrupts are pending
+/*
+ * XXXKYMA: We are simulatoring a processor that has the WII bit set in
+ * Config7, so we are "runnable" if interrupts are pending
*/
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
{
@@ -103,7 +106,10 @@ static void kvm_mips_init_tlbs(struct kvm *kvm)
{
unsigned long wired;
- /* Add a wired entry to the TLB, it is used to map the commpage to the Guest kernel */
+ /*
+ * Add a wired entry to the TLB, it is used to map the commpage to
+ * the Guest kernel
+ */
wired = read_c0_wired();
write_c0_wired(wired + 1);
mtc0_tlbw_hazard();
@@ -130,7 +136,6 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
on_each_cpu(kvm_mips_init_vm_percpu, kvm, 1);
}
-
return 0;
}
@@ -185,8 +190,8 @@ void kvm_arch_destroy_vm(struct kvm *kvm)
}
}
-long
-kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
+long kvm_arch_dev_ioctl(struct file *filp, unsigned int ioctl,
+ unsigned long arg)
{
return -ENOIOCTLCMD;
}
@@ -207,17 +212,17 @@ void kvm_arch_memslots_updated(struct kvm *kvm)
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
- struct kvm_memory_slot *memslot,
- struct kvm_userspace_memory_region *mem,
- enum kvm_mr_change change)
+ struct kvm_memory_slot *memslot,
+ struct kvm_userspace_memory_region *mem,
+ enum kvm_mr_change change)
{
return 0;
}
void kvm_arch_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
- const struct kvm_memory_slot *old,
- enum kvm_mr_change change)
+ struct kvm_userspace_memory_region *mem,
+ const struct kvm_memory_slot *old,
+ enum kvm_mr_change change)
{
unsigned long npages = 0;
int i, err = 0;
@@ -246,9 +251,8 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
npages, kvm->arch.guest_pmap);
/* Now setup the page table */
- for (i = 0; i < npages; i++) {
+ for (i = 0; i < npages; i++)
kvm->arch.guest_pmap[i] = KVM_INVALID_PAGE;
- }
}
}
out:
@@ -270,8 +274,6 @@ void kvm_arch_flush_shadow(struct kvm *kvm)
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
- extern char mips32_exception[], mips32_exceptionEnd[];
- extern char mips32_GuestException[], mips32_GuestExceptionEnd[];
int err, size, offset;
void *gebase;
int i;
@@ -290,14 +292,14 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
kvm_debug("kvm @ %p: create cpu %d at %p\n", kvm, id, vcpu);
- /* Allocate space for host mode exception handlers that handle
+ /*
+ * Allocate space for host mode exception handlers that handle
* guest mode exits
*/
- if (cpu_has_veic || cpu_has_vint) {
+ if (cpu_has_veic || cpu_has_vint)
size = 0x200 + VECTORSPACING * 64;
- } else {
+ else
size = 0x4000;
- }
/* Save Linux EBASE */
vcpu->arch.host_ebase = (void *)read_c0_ebase();
@@ -345,7 +347,10 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
local_flush_icache_range((unsigned long)gebase,
(unsigned long)gebase + ALIGN(size, PAGE_SIZE));
- /* Allocate comm page for guest kernel, a TLB will be reserved for mapping GVA @ 0xFFFF8000 to this page */
+ /*
+ * Allocate comm page for guest kernel, a TLB will be reserved for
+ * mapping GVA @ 0xFFFF8000 to this page
+ */
vcpu->arch.kseg0_commpage = kzalloc(PAGE_SIZE << 1, GFP_KERNEL);
if (!vcpu->arch.kseg0_commpage) {
@@ -391,9 +396,8 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
kvm_arch_vcpu_free(vcpu);
}
-int
-kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
- struct kvm_guest_debug *dbg)
+int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
+ struct kvm_guest_debug *dbg)
{
return -ENOIOCTLCMD;
}
@@ -430,8 +434,8 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
return r;
}
-int
-kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq)
+int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
+ struct kvm_mips_interrupt *irq)
{
int intr = (int)irq->irq;
struct kvm_vcpu *dvcpu = NULL;
@@ -458,23 +462,20 @@ kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq)
dvcpu->arch.wait = 0;
- if (waitqueue_active(&dvcpu->wq)) {
+ if (waitqueue_active(&dvcpu->wq))
wake_up_interruptible(&dvcpu->wq);
- }
return 0;
}
-int
-kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
- struct kvm_mp_state *mp_state)
+int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
{
return -ENOIOCTLCMD;
}
-int
-kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
- struct kvm_mp_state *mp_state)
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+ struct kvm_mp_state *mp_state)
{
return -ENOIOCTLCMD;
}
@@ -631,10 +632,12 @@ static int kvm_mips_get_reg(struct kvm_vcpu *vcpu,
}
if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U64) {
u64 __user *uaddr64 = (u64 __user *)(long)reg->addr;
+
return put_user(v, uaddr64);
} else if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U32) {
u32 __user *uaddr32 = (u32 __user *)(long)reg->addr;
u32 v32 = (u32)v;
+
return put_user(v32, uaddr32);
} else {
return -EINVAL;
@@ -727,8 +730,8 @@ static int kvm_mips_set_reg(struct kvm_vcpu *vcpu,
return 0;
}
-long
-kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
+long kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl,
+ unsigned long arg)
{
struct kvm_vcpu *vcpu = filp->private_data;
void __user *argp = (void __user *)arg;
@@ -738,6 +741,7 @@ kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
case KVM_SET_ONE_REG:
case KVM_GET_ONE_REG: {
struct kvm_one_reg reg;
+
if (copy_from_user(®, argp, sizeof(reg)))
return -EFAULT;
if (ioctl == KVM_SET_ONE_REG)
@@ -772,6 +776,7 @@ kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
case KVM_INTERRUPT:
{
struct kvm_mips_interrupt irq;
+
r = -EFAULT;
if (copy_from_user(&irq, argp, sizeof(irq)))
goto out;
@@ -790,9 +795,7 @@ out:
return r;
}
-/*
- * Get (and clear) the dirty memory log for a memory slot.
- */
+/* Get (and clear) the dirty memory log for a memory slot. */
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
{
struct kvm_memory_slot *memslot;
@@ -859,14 +862,14 @@ void kvm_arch_exit(void)
kvm_mips_callbacks = NULL;
}
-int
-kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
{
return -ENOIOCTLCMD;
}
-int
-kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
+ struct kvm_sregs *sregs)
{
return -ENOIOCTLCMD;
}
@@ -979,14 +982,11 @@ static void kvm_mips_comparecount_func(unsigned long data)
kvm_mips_callbacks->queue_timer_int(vcpu);
vcpu->arch.wait = 0;
- if (waitqueue_active(&vcpu->wq)) {
+ if (waitqueue_active(&vcpu->wq))
wake_up_interruptible(&vcpu->wq);
- }
}
-/*
- * low level hrtimer wake routine.
- */
+/* low level hrtimer wake routine */
static enum hrtimer_restart kvm_mips_comparecount_wakeup(struct hrtimer *timer)
{
struct kvm_vcpu *vcpu;
@@ -1010,8 +1010,8 @@ void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
return;
}
-int
-kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, struct kvm_translation *tr)
+int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
+ struct kvm_translation *tr)
{
return 0;
}
@@ -1022,8 +1022,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
return kvm_mips_callbacks->vcpu_setup(vcpu);
}
-static
-void kvm_mips_set_c0_status(void)
+static void kvm_mips_set_c0_status(void)
{
uint32_t status = read_c0_status();
@@ -1053,7 +1052,10 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
run->exit_reason = KVM_EXIT_UNKNOWN;
run->ready_for_interrupt_injection = 1;
- /* Set the appropriate status bits based on host CPU features, before we hit the scheduler */
+ /*
+ * Set the appropriate status bits based on host CPU features,
+ * before we hit the scheduler
+ */
kvm_mips_set_c0_status();
local_irq_enable();
@@ -1061,7 +1063,8 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
kvm_debug("kvm_mips_handle_exit: cause: %#x, PC: %p, kvm_run: %p, kvm_vcpu: %p\n",
cause, opc, run, vcpu);
- /* Do a privilege check, if in UM most of these exit conditions end up
+ /*
+ * Do a privilege check, if in UM most of these exit conditions end up
* causing an exception to be delivered to the Guest Kernel
*/
er = kvm_mips_check_privilege(cause, opc, run, vcpu);
@@ -1080,9 +1083,8 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
++vcpu->stat.int_exits;
trace_kvm_exit(vcpu, INT_EXITS);
- if (need_resched()) {
+ if (need_resched())
cond_resched();
- }
ret = RESUME_GUEST;
break;
@@ -1094,9 +1096,8 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
trace_kvm_exit(vcpu, COP_UNUSABLE_EXITS);
ret = kvm_mips_callbacks->handle_cop_unusable(vcpu);
/* XXXKYMA: Might need to return to user space */
- if (run->exit_reason == KVM_EXIT_IRQ_WINDOW_OPEN) {
+ if (run->exit_reason == KVM_EXIT_IRQ_WINDOW_OPEN)
ret = RESUME_HOST;
- }
break;
case T_TLB_MOD:
@@ -1106,10 +1107,9 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
break;
case T_TLB_ST_MISS:
- kvm_debug
- ("TLB ST fault: cause %#x, status %#lx, PC: %p, BadVaddr: %#lx\n",
- cause, kvm_read_c0_guest_status(vcpu->arch.cop0), opc,
- badvaddr);
+ kvm_debug("TLB ST fault: cause %#x, status %#lx, PC: %p, BadVaddr: %#lx\n",
+ cause, kvm_read_c0_guest_status(vcpu->arch.cop0), opc,
+ badvaddr);
++vcpu->stat.tlbmiss_st_exits;
trace_kvm_exit(vcpu, TLBMISS_ST_EXITS);
@@ -1156,10 +1156,9 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
break;
default:
- kvm_err
- ("Exception Code: %d, not yet handled, @ PC: %p, inst: 0x%08x BadVaddr: %#lx Status: %#lx\n",
- exccode, opc, kvm_get_inst(opc, vcpu), badvaddr,
- kvm_read_c0_guest_status(vcpu->arch.cop0));
+ kvm_err("Exception Code: %d, not yet handled, @ PC: %p, inst: 0x%08x BadVaddr: %#lx Status: %#lx\n",
+ exccode, opc, kvm_get_inst(opc, vcpu), badvaddr,
+ kvm_read_c0_guest_status(vcpu->arch.cop0));
kvm_arch_vcpu_dump_regs(vcpu);
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
ret = RESUME_HOST;
@@ -1174,7 +1173,7 @@ skip_emul:
kvm_mips_deliver_interrupts(vcpu, cause);
if (!(ret & RESUME_HOST)) {
- /* Only check for signals if not already exiting to userspace */
+ /* Only check for signals if not already exiting to userspace */
if (signal_pending(current)) {
run->exit_reason = KVM_EXIT_INTR;
ret = (-EINTR << 2) | RESUME_HOST;
@@ -1195,11 +1194,13 @@ int __init kvm_mips_init(void)
if (ret)
return ret;
- /* On MIPS, kernel modules are executed from "mapped space", which requires TLBs.
- * The TLB handling code is statically linked with the rest of the kernel (kvm_tlb.c)
- * to avoid the possibility of double faulting. The issue is that the TLB code
- * references routines that are part of the the KVM module,
- * which are only available once the module is loaded.
+ /*
+ * On MIPS, kernel modules are executed from "mapped space", which
+ * requires TLBs. The TLB handling code is statically linked with
+ * the rest of the kernel (kvm_tlb.c) to avoid the possibility of
+ * double faulting. The issue is that the TLB code references
+ * routines that are part of the the KVM module, which are only
+ * available once the module is loaded.
*/
kvm_mips_gfn_to_pfn = gfn_to_pfn;
kvm_mips_release_pfn_clean = kvm_release_pfn_clean;
diff --git a/arch/mips/kvm/kvm_mips_comm.h b/arch/mips/kvm/kvm_mips_comm.h
index a4a8c85..08c5fa2 100644
--- a/arch/mips/kvm/kvm_mips_comm.h
+++ b/arch/mips/kvm/kvm_mips_comm.h
@@ -1,19 +1,20 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* KVM/MIPS: commpage: mapped into get kernel space
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS: commpage: mapped into get kernel space
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
#ifndef __KVM_MIPS_COMMPAGE_H__
#define __KVM_MIPS_COMMPAGE_H__
struct kvm_mips_commpage {
- struct mips_coproc cop0; /* COP0 state is mapped into Guest kernel via commpage */
+ /* COP0 state is mapped into Guest kernel via commpage */
+ struct mips_coproc cop0;
};
#define KVM_MIPS_COMM_EIDI_OFFSET 0x0
diff --git a/arch/mips/kvm/kvm_mips_commpage.c b/arch/mips/kvm/kvm_mips_commpage.c
index 3873b1e..ab7096e 100644
--- a/arch/mips/kvm/kvm_mips_commpage.c
+++ b/arch/mips/kvm/kvm_mips_commpage.c
@@ -1,14 +1,14 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* commpage, currently used for Virtual COP0 registers.
-* Mapped into the guest kernel @ 0x0.
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * commpage, currently used for Virtual COP0 registers.
+ * Mapped into the guest kernel @ 0x0.
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
#include <linux/errno.h>
#include <linux/err.h>
@@ -27,6 +27,7 @@
void kvm_mips_commpage_init(struct kvm_vcpu *vcpu)
{
struct kvm_mips_commpage *page = vcpu->arch.kseg0_commpage;
+
memset(page, 0, sizeof(struct kvm_mips_commpage));
/* Specific init values for fields */
diff --git a/arch/mips/kvm/kvm_mips_dyntrans.c b/arch/mips/kvm/kvm_mips_dyntrans.c
index b80e41d..fa7184d 100644
--- a/arch/mips/kvm/kvm_mips_dyntrans.c
+++ b/arch/mips/kvm/kvm_mips_dyntrans.c
@@ -1,13 +1,13 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* KVM/MIPS: Binary Patching for privileged instructions, reduces traps.
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS: Binary Patching for privileged instructions, reduces traps.
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
#include <linux/errno.h>
#include <linux/err.h>
@@ -28,9 +28,8 @@
#define CLEAR_TEMPLATE 0x00000020
#define SW_TEMPLATE 0xac000000
-int
-kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc,
- struct kvm_vcpu *vcpu)
+int kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc,
+ struct kvm_vcpu *vcpu)
{
int result = 0;
unsigned long kseg0_opc;
@@ -47,12 +46,11 @@ kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc,
}
/*
- * Address based CACHE instructions are transformed into synci(s). A little heavy
- * for just D-cache invalidates, but avoids an expensive trap
+ * Address based CACHE instructions are transformed into synci(s). A little
+ * heavy for just D-cache invalidates, but avoids an expensive trap
*/
-int
-kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc,
- struct kvm_vcpu *vcpu)
+int kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc,
+ struct kvm_vcpu *vcpu)
{
int result = 0;
unsigned long kseg0_opc;
@@ -72,8 +70,7 @@ kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc,
return result;
}
-int
-kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc, struct kvm_vcpu *vcpu)
+int kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc, struct kvm_vcpu *vcpu)
{
int32_t rt, rd, sel;
uint32_t mfc0_inst;
@@ -115,8 +112,7 @@ kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc, struct kvm_vcpu *vcpu)
return 0;
}
-int
-kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc, struct kvm_vcpu *vcpu)
+int kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc, struct kvm_vcpu *vcpu)
{
int32_t rt, rd, sel;
uint32_t mtc0_inst = SW_TEMPLATE;
diff --git a/arch/mips/kvm/kvm_mips_emul.c b/arch/mips/kvm/kvm_mips_emul.c
index 8d48400..993dd1c 100644
--- a/arch/mips/kvm/kvm_mips_emul.c
+++ b/arch/mips/kvm/kvm_mips_emul.c
@@ -1,13 +1,13 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* KVM/MIPS: Instruction/Exception emulation
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS: Instruction/Exception emulation
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
#include <linux/errno.h>
#include <linux/err.h>
@@ -51,18 +51,14 @@ unsigned long kvm_compute_return_epc(struct kvm_vcpu *vcpu,
if (epc & 3)
goto unaligned;
- /*
- * Read the instruction
- */
+ /* Read the instruction */
insn.word = kvm_get_inst((uint32_t *) epc, vcpu);
if (insn.word == KVM_INVALID_INST)
return KVM_INVALID_INST;
switch (insn.i_format.opcode) {
- /*
- * jr and jalr are in r_format format.
- */
+ /* jr and jalr are in r_format format. */
case spec_op:
switch (insn.r_format.func) {
case jalr_op:
@@ -124,18 +120,16 @@ unsigned long kvm_compute_return_epc(struct kvm_vcpu *vcpu,
dspcontrol = rddsp(0x01);
- if (dspcontrol >= 32) {
+ if (dspcontrol >= 32)
epc = epc + 4 + (insn.i_format.simmediate << 2);
- } else
+ else
epc += 8;
nextpc = epc;
break;
}
break;
- /*
- * These are unconditional and in j_format.
- */
+ /* These are unconditional and in j_format. */
case jal_op:
arch->gprs[31] = instpc + 8;
case j_op:
@@ -146,9 +140,7 @@ unsigned long kvm_compute_return_epc(struct kvm_vcpu *vcpu,
nextpc = epc;
break;
- /*
- * These are conditional and in i_format.
- */
+ /* These are conditional and in i_format. */
case beq_op:
case beql_op:
if (arch->gprs[insn.i_format.rs] ==
@@ -189,9 +181,7 @@ unsigned long kvm_compute_return_epc(struct kvm_vcpu *vcpu,
nextpc = epc;
break;
- /*
- * And now the FPA/cp1 branch instructions.
- */
+ /* And now the FPA/cp1 branch instructions. */
case cop1_op:
printk("%s: unsupported cop1_op\n", __func__);
break;
@@ -219,7 +209,8 @@ enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause)
er = EMULATE_FAIL;
} else {
vcpu->arch.pc = branch_pc;
- kvm_debug("BD update_pc(): New PC: %#lx\n", vcpu->arch.pc);
+ kvm_debug("BD update_pc(): New PC: %#lx\n",
+ vcpu->arch.pc);
}
} else
vcpu->arch.pc += 4;
@@ -240,6 +231,7 @@ enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause)
static inline int kvm_mips_count_disabled(struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
+
return (vcpu->arch.count_ctl & KVM_REG_MIPS_COUNT_CTL_DC) ||
(kvm_read_c0_guest_cause(cop0) & CAUSEF_DC);
}
@@ -392,7 +384,6 @@ static ktime_t kvm_mips_freeze_hrtimer(struct kvm_vcpu *vcpu,
return now;
}
-
/**
* kvm_mips_resume_hrtimer() - Resume hrtimer, updating expiry.
* @vcpu: Virtual CPU.
@@ -781,8 +772,9 @@ enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu *vcpu)
vcpu->arch.wait = 1;
kvm_vcpu_block(vcpu);
- /* We we are runnable, then definitely go off to user space to check if any
- * I/O interrupts are pending.
+ /*
+ * We we are runnable, then definitely go off to user space to
+ * check if any I/O interrupts are pending.
*/
if (kvm_check_request(KVM_REQ_UNHALT, vcpu)) {
clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
@@ -793,8 +785,9 @@ enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu *vcpu)
return er;
}
-/* XXXKYMA: Linux doesn't seem to use TLBR, return EMULATE_FAIL for now so that we can catch
- * this, if things ever change
+/*
+ * XXXKYMA: Linux doesn't seem to use TLBR, return EMULATE_FAIL for now so that
+ * we can catch this, if things ever change
*/
enum emulation_result kvm_mips_emul_tlbr(struct kvm_vcpu *vcpu)
{
@@ -827,21 +820,22 @@ enum emulation_result kvm_mips_emul_tlbwi(struct kvm_vcpu *vcpu)
}
tlb = &vcpu->arch.guest_tlb[index];
-#if 1
- /* Probe the shadow host TLB for the entry being overwritten, if one matches, invalidate it */
+ /*
+ * Probe the shadow host TLB for the entry being overwritten, if one
+ * matches, invalidate it
+ */
kvm_mips_host_tlb_inv(vcpu, tlb->tlb_hi);
-#endif
tlb->tlb_mask = kvm_read_c0_guest_pagemask(cop0);
tlb->tlb_hi = kvm_read_c0_guest_entryhi(cop0);
tlb->tlb_lo0 = kvm_read_c0_guest_entrylo0(cop0);
tlb->tlb_lo1 = kvm_read_c0_guest_entrylo1(cop0);
- kvm_debug
- ("[%#x] COP0_TLBWI [%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx, mask: %#lx)\n",
- pc, index, kvm_read_c0_guest_entryhi(cop0),
- kvm_read_c0_guest_entrylo0(cop0), kvm_read_c0_guest_entrylo1(cop0),
- kvm_read_c0_guest_pagemask(cop0));
+ kvm_debug("[%#x] COP0_TLBWI [%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx, mask: %#lx)\n",
+ pc, index, kvm_read_c0_guest_entryhi(cop0),
+ kvm_read_c0_guest_entrylo0(cop0),
+ kvm_read_c0_guest_entrylo1(cop0),
+ kvm_read_c0_guest_pagemask(cop0));
return er;
}
@@ -855,12 +849,8 @@ enum emulation_result kvm_mips_emul_tlbwr(struct kvm_vcpu *vcpu)
uint32_t pc = vcpu->arch.pc;
int index;
-#if 1
get_random_bytes(&index, sizeof(index));
index &= (KVM_MIPS_GUEST_TLB_SIZE - 1);
-#else
- index = jiffies % KVM_MIPS_GUEST_TLB_SIZE;
-#endif
if (index < 0 || index >= KVM_MIPS_GUEST_TLB_SIZE) {
printk("%s: illegal index: %d\n", __func__, index);
@@ -869,21 +859,21 @@ enum emulation_result kvm_mips_emul_tlbwr(struct kvm_vcpu *vcpu)
tlb = &vcpu->arch.guest_tlb[index];
-#if 1
- /* Probe the shadow host TLB for the entry being overwritten, if one matches, invalidate it */
+ /*
+ * Probe the shadow host TLB for the entry being overwritten, if one
+ * matches, invalidate it
+ */
kvm_mips_host_tlb_inv(vcpu, tlb->tlb_hi);
-#endif
tlb->tlb_mask = kvm_read_c0_guest_pagemask(cop0);
tlb->tlb_hi = kvm_read_c0_guest_entryhi(cop0);
tlb->tlb_lo0 = kvm_read_c0_guest_entrylo0(cop0);
tlb->tlb_lo1 = kvm_read_c0_guest_entrylo1(cop0);
- kvm_debug
- ("[%#x] COP0_TLBWR[%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx)\n",
- pc, index, kvm_read_c0_guest_entryhi(cop0),
- kvm_read_c0_guest_entrylo0(cop0),
- kvm_read_c0_guest_entrylo1(cop0));
+ kvm_debug("[%#x] COP0_TLBWR[%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx)\n",
+ pc, index, kvm_read_c0_guest_entryhi(cop0),
+ kvm_read_c0_guest_entrylo0(cop0),
+ kvm_read_c0_guest_entrylo1(cop0));
return er;
}
@@ -906,9 +896,9 @@ enum emulation_result kvm_mips_emul_tlbp(struct kvm_vcpu *vcpu)
return er;
}
-enum emulation_result
-kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, uint32_t cause,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc,
+ uint32_t cause, struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
enum emulation_result er = EMULATE_DONE;
@@ -922,9 +912,8 @@ kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, uint32_t cause,
*/
curr_pc = vcpu->arch.pc;
er = update_pc(vcpu, cause);
- if (er == EMULATE_FAIL) {
+ if (er == EMULATE_FAIL)
return er;
- }
copz = (inst >> 21) & 0x1f;
rt = (inst >> 16) & 0x1f;
@@ -973,8 +962,7 @@ kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, uint32_t cause,
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
kvm_mips_trans_mfc0(inst, opc, vcpu);
#endif
- }
- else {
+ } else {
vcpu->arch.gprs[rt] = cop0->reg[rd][sel];
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
@@ -1014,17 +1002,15 @@ kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, uint32_t cause,
kvm_read_c0_guest_ebase(cop0));
} else if (rd == MIPS_CP0_TLB_HI && sel == 0) {
uint32_t nasid =
- vcpu->arch.gprs[rt] & ASID_MASK;
- if ((KSEGX(vcpu->arch.gprs[rt]) != CKSEG0)
- &&
+ vcpu->arch.gprs[rt] & ASID_MASK;
+ if ((KSEGX(vcpu->arch.gprs[rt]) != CKSEG0) &&
((kvm_read_c0_guest_entryhi(cop0) &
ASID_MASK) != nasid)) {
-
- kvm_debug
- ("MTCz, change ASID from %#lx to %#lx\n",
- kvm_read_c0_guest_entryhi(cop0) &
- ASID_MASK,
- vcpu->arch.gprs[rt] & ASID_MASK);
+ kvm_debug("MTCz, change ASID from %#lx to %#lx\n",
+ kvm_read_c0_guest_entryhi(cop0)
+ & ASID_MASK,
+ vcpu->arch.gprs[rt]
+ & ASID_MASK);
/* Blow away the shadow host TLBs */
kvm_mips_flush_host_tlb(1);
@@ -1049,7 +1035,10 @@ kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, uint32_t cause,
} else if ((rd == MIPS_CP0_STATUS) && (sel == 0)) {
kvm_write_c0_guest_status(cop0,
vcpu->arch.gprs[rt]);
- /* Make sure that CU1 and NMI bits are never set */
+ /*
+ * Make sure that CU1 and NMI bits are
+ * never set
+ */
kvm_clear_c0_guest_status(cop0,
(ST0_CU1 | ST0_NMI));
@@ -1058,6 +1047,7 @@ kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, uint32_t cause,
#endif
} else if ((rd == MIPS_CP0_CAUSE) && (sel == 0)) {
uint32_t old_cause, new_cause;
+
old_cause = kvm_read_c0_guest_cause(cop0);
new_cause = vcpu->arch.gprs[rt];
/* Update R/W bits */
@@ -1115,7 +1105,10 @@ kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, uint32_t cause,
cop0->reg[MIPS_CP0_STATUS][2] & 0xf;
uint32_t pss =
(cop0->reg[MIPS_CP0_STATUS][2] >> 6) & 0xf;
- /* We don't support any shadow register sets, so SRSCtl[PSS] == SRSCtl[CSS] = 0 */
+ /*
+ * We don't support any shadow register sets, so
+ * SRSCtl[PSS] == SRSCtl[CSS] = 0
+ */
if (css || pss) {
er = EMULATE_FAIL;
break;
@@ -1135,12 +1128,9 @@ kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, uint32_t cause,
}
done:
- /*
- * Rollback PC only if emulation was unsuccessful
- */
- if (er == EMULATE_FAIL) {
+ /* Rollback PC only if emulation was unsuccessful */
+ if (er == EMULATE_FAIL)
vcpu->arch.pc = curr_pc;
- }
dont_update_pc:
/*
@@ -1152,9 +1142,9 @@ dont_update_pc:
return er;
}
-enum emulation_result
-kvm_mips_emulate_store(uint32_t inst, uint32_t cause,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_store(uint32_t inst, uint32_t cause,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DO_MMIO;
int32_t op, base, rt, offset;
@@ -1257,19 +1247,16 @@ kvm_mips_emulate_store(uint32_t inst, uint32_t cause,
break;
}
- /*
- * Rollback PC if emulation was unsuccessful
- */
- if (er == EMULATE_FAIL) {
+ /* Rollback PC if emulation was unsuccessful */
+ if (er == EMULATE_FAIL)
vcpu->arch.pc = curr_pc;
- }
return er;
}
-enum emulation_result
-kvm_mips_emulate_load(uint32_t inst, uint32_t cause,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_load(uint32_t inst, uint32_t cause,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DO_MMIO;
int32_t op, base, rt, offset;
@@ -1410,13 +1397,12 @@ int kvm_mips_sync_icache(unsigned long va, struct kvm_vcpu *vcpu)
#define MIPS_CACHE_DCACHE 0x1
#define MIPS_CACHE_SEC 0x3
-enum emulation_result
-kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, uint32_t cause,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc,
+ uint32_t cause,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
- extern void (*r4k_blast_dcache) (void);
- extern void (*r4k_blast_icache) (void);
enum emulation_result er = EMULATE_DONE;
int32_t offset, cache, op_inst, op, base;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -1443,14 +1429,15 @@ kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, uint32_t cause,
kvm_debug("CACHE (cache: %#x, op: %#x, base[%d]: %#lx, offset: %#x\n",
cache, op, base, arch->gprs[base], offset);
- /* Treat INDEX_INV as a nop, basically issued by Linux on startup to invalidate
- * the caches entirely by stepping through all the ways/indexes
+ /*
+ * Treat INDEX_INV as a nop, basically issued by Linux on startup to
+ * invalidate the caches entirely by stepping through all the
+ * ways/indexes
*/
if (op == MIPS_CACHE_OP_INDEX_INV) {
- kvm_debug
- ("@ %#lx/%#lx CACHE (cache: %#x, op: %#x, base[%d]: %#lx, offset: %#x\n",
- vcpu->arch.pc, vcpu->arch.gprs[31], cache, op, base,
- arch->gprs[base], offset);
+ kvm_debug("@ %#lx/%#lx CACHE (cache: %#x, op: %#x, base[%d]: %#lx, offset: %#x\n",
+ vcpu->arch.pc, vcpu->arch.gprs[31], cache, op, base,
+ arch->gprs[base], offset);
if (cache == MIPS_CACHE_DCACHE)
r4k_blast_dcache();
@@ -1470,21 +1457,19 @@ kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, uint32_t cause,
preempt_disable();
if (KVM_GUEST_KSEGX(va) == KVM_GUEST_KSEG0) {
-
- if (kvm_mips_host_tlb_lookup(vcpu, va) < 0) {
+ if (kvm_mips_host_tlb_lookup(vcpu, va) < 0)
kvm_mips_handle_kseg0_tlb_fault(va, vcpu);
- }
} else if ((KVM_GUEST_KSEGX(va) < KVM_GUEST_KSEG0) ||
KVM_GUEST_KSEGX(va) == KVM_GUEST_KSEG23) {
int index;
/* If an entry already exists then skip */
- if (kvm_mips_host_tlb_lookup(vcpu, va) >= 0) {
+ if (kvm_mips_host_tlb_lookup(vcpu, va) >= 0)
goto skip_fault;
- }
- /* If address not in the guest TLB, then give the guest a fault, the
- * resulting handler will do the right thing
+ /*
+ * If address not in the guest TLB, then give the guest a fault,
+ * the resulting handler will do the right thing
*/
index = kvm_mips_guest_tlb_lookup(vcpu, (va & VPN2_MASK) |
(kvm_read_c0_guest_entryhi
@@ -1499,14 +1484,20 @@ kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, uint32_t cause,
goto dont_update_pc;
} else {
struct kvm_mips_tlb *tlb = &vcpu->arch.guest_tlb[index];
- /* Check if the entry is valid, if not then setup a TLB invalid exception to the guest */
+ /*
+ * Check if the entry is valid, if not then setup a TLB
+ * invalid exception to the guest
+ */
if (!TLB_IS_VALID(*tlb, va)) {
er = kvm_mips_emulate_tlbinv_ld(cause, NULL,
run, vcpu);
preempt_enable();
goto dont_update_pc;
} else {
- /* We fault an entry from the guest tlb to the shadow host TLB */
+ /*
+ * We fault an entry from the guest tlb to the
+ * shadow host TLB
+ */
kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb,
NULL,
NULL);
@@ -1530,7 +1521,10 @@ skip_fault:
flush_dcache_line(va);
#ifdef CONFIG_KVM_MIPS_DYN_TRANS
- /* Replace the CACHE instruction, with a SYNCI, not the same, but avoids a trap */
+ /*
+ * Replace the CACHE instruction, with a SYNCI, not the same,
+ * but avoids a trap
+ */
kvm_mips_trans_cache_va(inst, opc, vcpu);
#endif
} else if (op == MIPS_CACHE_OP_HIT_INV && cache == MIPS_CACHE_ICACHE) {
@@ -1552,28 +1546,23 @@ skip_fault:
preempt_enable();
- dont_update_pc:
- /*
- * Rollback PC
- */
+dont_update_pc:
+ /* Rollback PC */
vcpu->arch.pc = curr_pc;
- done:
+done:
return er;
}
-enum emulation_result
-kvm_mips_emulate_inst(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_inst(unsigned long cause, uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DONE;
uint32_t inst;
- /*
- * Fetch the instruction.
- */
- if (cause & CAUSEF_BD) {
+ /* Fetch the instruction. */
+ if (cause & CAUSEF_BD)
opc += 1;
- }
inst = kvm_get_inst(opc, vcpu);
@@ -1611,9 +1600,10 @@ kvm_mips_emulate_inst(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_emulate_syscall(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_syscall(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -1645,9 +1635,10 @@ kvm_mips_emulate_syscall(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_emulate_tlbmiss_ld(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_tlbmiss_ld(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -1691,9 +1682,10 @@ kvm_mips_emulate_tlbmiss_ld(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_emulate_tlbinv_ld(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_tlbinv_ld(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -1737,9 +1729,10 @@ kvm_mips_emulate_tlbinv_ld(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_emulate_tlbmiss_st(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_tlbmiss_st(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -1781,9 +1774,10 @@ kvm_mips_emulate_tlbmiss_st(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_emulate_tlbinv_st(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_tlbinv_st(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -1826,9 +1820,9 @@ kvm_mips_emulate_tlbinv_st(unsigned long cause, uint32_t *opc,
}
/* TLBMOD: store into address matching TLB with Dirty bit off */
-enum emulation_result
-kvm_mips_handle_tlbmod(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_handle_tlbmod(unsigned long cause, uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DONE;
#ifdef DEBUG
@@ -1837,9 +1831,7 @@ kvm_mips_handle_tlbmod(unsigned long cause, uint32_t *opc,
(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
int index;
- /*
- * If address not in the guest TLB, then we are in trouble
- */
+ /* If address not in the guest TLB, then we are in trouble */
index = kvm_mips_guest_tlb_lookup(vcpu, entryhi);
if (index < 0) {
/* XXXKYMA Invalidate and retry */
@@ -1856,9 +1848,10 @@ kvm_mips_handle_tlbmod(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_emulate_tlbmod(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_tlbmod(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
unsigned long entryhi = (vcpu->arch.host_cp0_badvaddr & VPN2_MASK) |
@@ -1898,9 +1891,10 @@ kvm_mips_emulate_tlbmod(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_emulate_fpu_exc(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_fpu_exc(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -1927,9 +1921,10 @@ kvm_mips_emulate_fpu_exc(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_emulate_ri_exc(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_ri_exc(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -1961,9 +1956,10 @@ kvm_mips_emulate_ri_exc(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_emulate_bp_exc(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_emulate_bp_exc(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -1995,9 +1991,7 @@ kvm_mips_emulate_bp_exc(unsigned long cause, uint32_t *opc,
return er;
}
-/*
- * ll/sc, rdhwr, sync emulation
- */
+/* ll/sc, rdhwr, sync emulation */
#define OPCODE 0xfc000000
#define BASE 0x03e00000
@@ -2012,9 +2006,9 @@ kvm_mips_emulate_bp_exc(unsigned long cause, uint32_t *opc,
#define SYNC 0x0000000f
#define RDHWR 0x0000003b
-enum emulation_result
-kvm_mips_handle_ri(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_handle_ri(unsigned long cause, uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
struct kvm_vcpu_arch *arch = &vcpu->arch;
@@ -2031,9 +2025,7 @@ kvm_mips_handle_ri(unsigned long cause, uint32_t *opc,
if (er == EMULATE_FAIL)
return er;
- /*
- * Fetch the instruction.
- */
+ /* Fetch the instruction. */
if (cause & CAUSEF_BD)
opc += 1;
@@ -2099,8 +2091,8 @@ emulate_ri:
return kvm_mips_emulate_ri_exc(cause, opc, run, vcpu);
}
-enum emulation_result
-kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run)
+enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu,
+ struct kvm_run *run)
{
unsigned long *gpr = &vcpu->arch.gprs[vcpu->arch.io_gpr];
enum emulation_result er = EMULATE_DONE;
@@ -2142,18 +2134,18 @@ kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run)
}
if (vcpu->arch.pending_load_cause & CAUSEF_BD)
- kvm_debug
- ("[%#lx] Completing %d byte BD Load to gpr %d (0x%08lx) type %d\n",
- vcpu->arch.pc, run->mmio.len, vcpu->arch.io_gpr, *gpr,
- vcpu->mmio_needed);
+ kvm_debug("[%#lx] Completing %d byte BD Load to gpr %d (0x%08lx) type %d\n",
+ vcpu->arch.pc, run->mmio.len, vcpu->arch.io_gpr, *gpr,
+ vcpu->mmio_needed);
done:
return er;
}
-static enum emulation_result
-kvm_mips_emulate_exc(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+static enum emulation_result kvm_mips_emulate_exc(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f;
struct mips_coproc *cop0 = vcpu->arch.cop0;
@@ -2188,9 +2180,10 @@ kvm_mips_emulate_exc(unsigned long cause, uint32_t *opc,
return er;
}
-enum emulation_result
-kvm_mips_check_privilege(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_check_privilege(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DONE;
uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f;
@@ -2215,7 +2208,10 @@ kvm_mips_check_privilege(unsigned long cause, uint32_t *opc,
break;
case T_TLB_LD_MISS:
- /* We we are accessing Guest kernel space, then send an address error exception to the guest */
+ /*
+ * We we are accessing Guest kernel space, then send an
+ * address error exception to the guest
+ */
if (badvaddr >= (unsigned long) KVM_GUEST_KSEG0) {
printk("%s: LD MISS @ %#lx\n", __func__,
badvaddr);
@@ -2226,7 +2222,10 @@ kvm_mips_check_privilege(unsigned long cause, uint32_t *opc,
break;
case T_TLB_ST_MISS:
- /* We we are accessing Guest kernel space, then send an address error exception to the guest */
+ /*
+ * We we are accessing Guest kernel space, then send an
+ * address error exception to the guest
+ */
if (badvaddr >= (unsigned long) KVM_GUEST_KSEG0) {
printk("%s: ST MISS @ %#lx\n", __func__,
badvaddr);
@@ -2260,21 +2259,23 @@ kvm_mips_check_privilege(unsigned long cause, uint32_t *opc,
}
}
- if (er == EMULATE_PRIV_FAIL) {
+ if (er == EMULATE_PRIV_FAIL)
kvm_mips_emulate_exc(cause, opc, run, vcpu);
- }
+
return er;
}
-/* User Address (UA) fault, this could happen if
+/*
+ * User Address (UA) fault, this could happen if
* (1) TLB entry not present/valid in both Guest and shadow host TLBs, in this
* case we pass on the fault to the guest kernel and let it handle it.
* (2) TLB entry is present in the Guest TLB but not in the shadow, in this
* case we inject the TLB from the Guest TLB into the shadow host TLB
*/
-enum emulation_result
-kvm_mips_handle_tlbmiss(unsigned long cause, uint32_t *opc,
- struct kvm_run *run, struct kvm_vcpu *vcpu)
+enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause,
+ uint32_t *opc,
+ struct kvm_run *run,
+ struct kvm_vcpu *vcpu)
{
enum emulation_result er = EMULATE_DONE;
uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f;
@@ -2284,10 +2285,11 @@ kvm_mips_handle_tlbmiss(unsigned long cause, uint32_t *opc,
kvm_debug("kvm_mips_handle_tlbmiss: badvaddr: %#lx, entryhi: %#lx\n",
vcpu->arch.host_cp0_badvaddr, vcpu->arch.host_cp0_entryhi);
- /* KVM would not have got the exception if this entry was valid in the shadow host TLB
- * Check the Guest TLB, if the entry is not there then send the guest an
- * exception. The guest exc handler should then inject an entry into the
- * guest TLB
+ /*
+ * KVM would not have got the exception if this entry was valid in the
+ * shadow host TLB. Check the Guest TLB, if the entry is not there then
+ * send the guest an exception. The guest exc handler should then inject
+ * an entry into the guest TLB.
*/
index = kvm_mips_guest_tlb_lookup(vcpu,
(va & VPN2_MASK) |
@@ -2305,7 +2307,10 @@ kvm_mips_handle_tlbmiss(unsigned long cause, uint32_t *opc,
} else {
struct kvm_mips_tlb *tlb = &vcpu->arch.guest_tlb[index];
- /* Check if the entry is valid, if not then setup a TLB invalid exception to the guest */
+ /*
+ * Check if the entry is valid, if not then setup a TLB invalid
+ * exception to the guest
+ */
if (!TLB_IS_VALID(*tlb, va)) {
if (exccode == T_TLB_LD_MISS) {
er = kvm_mips_emulate_tlbinv_ld(cause, opc, run,
@@ -2319,10 +2324,12 @@ kvm_mips_handle_tlbmiss(unsigned long cause, uint32_t *opc,
er = EMULATE_FAIL;
}
} else {
- kvm_debug
- ("Injecting hi: %#lx, lo0: %#lx, lo1: %#lx into shadow host TLB\n",
- tlb->tlb_hi, tlb->tlb_lo0, tlb->tlb_lo1);
- /* OK we have a Guest TLB entry, now inject it into the shadow host TLB */
+ kvm_debug("Injecting hi: %#lx, lo0: %#lx, lo1: %#lx into shadow host TLB\n",
+ tlb->tlb_hi, tlb->tlb_lo0, tlb->tlb_lo1);
+ /*
+ * OK we have a Guest TLB entry, now inject it into the
+ * shadow host TLB
+ */
kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb, NULL,
NULL);
}
diff --git a/arch/mips/kvm/kvm_mips_int.c b/arch/mips/kvm/kvm_mips_int.c
index 1e5de16..d458c04 100644
--- a/arch/mips/kvm/kvm_mips_int.c
+++ b/arch/mips/kvm/kvm_mips_int.c
@@ -1,13 +1,13 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* KVM/MIPS: Interrupt delivery
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS: Interrupt delivery
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
#include <linux/errno.h>
#include <linux/err.h>
@@ -34,7 +34,8 @@ void kvm_mips_dequeue_irq(struct kvm_vcpu *vcpu, uint32_t priority)
void kvm_mips_queue_timer_int_cb(struct kvm_vcpu *vcpu)
{
- /* Cause bits to reflect the pending timer interrupt,
+ /*
+ * Cause bits to reflect the pending timer interrupt,
* the EXC code will be set when we are actually
* delivering the interrupt:
*/
@@ -51,12 +52,13 @@ void kvm_mips_dequeue_timer_int_cb(struct kvm_vcpu *vcpu)
kvm_mips_dequeue_irq(vcpu, MIPS_EXC_INT_TIMER);
}
-void
-kvm_mips_queue_io_int_cb(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq)
+void kvm_mips_queue_io_int_cb(struct kvm_vcpu *vcpu,
+ struct kvm_mips_interrupt *irq)
{
int intr = (int)irq->irq;
- /* Cause bits to reflect the pending IO interrupt,
+ /*
+ * Cause bits to reflect the pending IO interrupt,
* the EXC code will be set when we are actually
* delivering the interrupt:
*/
@@ -83,11 +85,11 @@ kvm_mips_queue_io_int_cb(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq)
}
-void
-kvm_mips_dequeue_io_int_cb(struct kvm_vcpu *vcpu,
- struct kvm_mips_interrupt *irq)
+void kvm_mips_dequeue_io_int_cb(struct kvm_vcpu *vcpu,
+ struct kvm_mips_interrupt *irq)
{
int intr = (int)irq->irq;
+
switch (intr) {
case -2:
kvm_clear_c0_guest_cause(vcpu->arch.cop0, (C_IRQ0));
@@ -111,9 +113,8 @@ kvm_mips_dequeue_io_int_cb(struct kvm_vcpu *vcpu,
}
/* Deliver the interrupt of the corresponding priority, if possible. */
-int
-kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority,
- uint32_t cause)
+int kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority,
+ uint32_t cause)
{
int allowed = 0;
uint32_t exccode;
@@ -164,7 +165,6 @@ kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority,
/* Are we allowed to deliver the interrupt ??? */
if (allowed) {
-
if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
/* save old pc */
kvm_write_c0_guest_epc(cop0, arch->pc);
@@ -195,9 +195,8 @@ kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority,
return allowed;
}
-int
-kvm_mips_irq_clear_cb(struct kvm_vcpu *vcpu, unsigned int priority,
- uint32_t cause)
+int kvm_mips_irq_clear_cb(struct kvm_vcpu *vcpu, unsigned int priority,
+ uint32_t cause)
{
return 1;
}
diff --git a/arch/mips/kvm/kvm_mips_int.h b/arch/mips/kvm/kvm_mips_int.h
index 20da7d2..4ab4bdf 100644
--- a/arch/mips/kvm/kvm_mips_int.h
+++ b/arch/mips/kvm/kvm_mips_int.h
@@ -1,14 +1,15 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* KVM/MIPS: Interrupts
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS: Interrupts
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
-/* MIPS Exception Priorities, exceptions (including interrupts) are queued up
+/*
+ * MIPS Exception Priorities, exceptions (including interrupts) are queued up
* for the guest in the order specified by their priorities
*/
@@ -27,6 +28,9 @@
#define MIPS_EXC_MAX 12
/* XXXSL More to follow */
+extern char mips32_exception[], mips32_exceptionEnd[];
+extern char mips32_GuestException[], mips32_GuestExceptionEnd[];
+
#define C_TI (_ULCAST_(1) << 30)
#define KVM_MIPS_IRQ_DELIVER_ALL_AT_ONCE (0)
diff --git a/arch/mips/kvm/kvm_mips_opcode.h b/arch/mips/kvm/kvm_mips_opcode.h
index 86d3b4c..03a6ae8 100644
--- a/arch/mips/kvm/kvm_mips_opcode.h
+++ b/arch/mips/kvm/kvm_mips_opcode.h
@@ -1,24 +1,22 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
-
-/*
- * Define opcode values not defined in <asm/isnt.h>
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
*/
+/* Define opcode values not defined in <asm/isnt.h> */
+
#ifndef __KVM_MIPS_OPCODE_H__
#define __KVM_MIPS_OPCODE_H__
/* COP0 Ops */
-#define mfmcz_op 0x0b /* 01011 */
-#define wrpgpr_op 0x0e /* 01110 */
+#define mfmcz_op 0x0b /* 01011 */
+#define wrpgpr_op 0x0e /* 01110 */
-/* COP0 opcodes (only if COP0 and CO=1): */
-#define wait_op 0x20 /* 100000 */
+/* COP0 opcodes (only if COP0 and CO=1): */
+#define wait_op 0x20 /* 100000 */
#endif /* __KVM_MIPS_OPCODE_H__ */
diff --git a/arch/mips/kvm/kvm_mips_stats.c b/arch/mips/kvm/kvm_mips_stats.c
index 075904b..6efef38 100644
--- a/arch/mips/kvm/kvm_mips_stats.c
+++ b/arch/mips/kvm/kvm_mips_stats.c
@@ -1,13 +1,13 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* KVM/MIPS: COP0 access histogram
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS: COP0 access histogram
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
#include <linux/kvm_host.h>
diff --git a/arch/mips/kvm/kvm_tlb.c b/arch/mips/kvm/kvm_tlb.c
index 8a5a700..bb7418b 100644
--- a/arch/mips/kvm/kvm_tlb.c
+++ b/arch/mips/kvm/kvm_tlb.c
@@ -1,14 +1,14 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* KVM/MIPS TLB handling, this file is part of the Linux host kernel so that
-* TLB handlers run from KSEG0
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS TLB handling, this file is part of the Linux host kernel so that
+ * TLB handlers run from KSEG0
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
#include <linux/sched.h>
#include <linux/smp.h>
@@ -18,7 +18,6 @@
#include <linux/kvm_host.h>
#include <linux/srcu.h>
-
#include <asm/cpu.h>
#include <asm/bootinfo.h>
#include <asm/mmu_context.h>
@@ -39,13 +38,13 @@ atomic_t kvm_mips_instance;
EXPORT_SYMBOL(kvm_mips_instance);
/* These function pointers are initialized once the KVM module is loaded */
-pfn_t(*kvm_mips_gfn_to_pfn) (struct kvm *kvm, gfn_t gfn);
+pfn_t (*kvm_mips_gfn_to_pfn)(struct kvm *kvm, gfn_t gfn);
EXPORT_SYMBOL(kvm_mips_gfn_to_pfn);
-void (*kvm_mips_release_pfn_clean) (pfn_t pfn);
+void (*kvm_mips_release_pfn_clean)(pfn_t pfn);
EXPORT_SYMBOL(kvm_mips_release_pfn_clean);
-bool(*kvm_mips_is_error_pfn) (pfn_t pfn);
+bool (*kvm_mips_is_error_pfn)(pfn_t pfn);
EXPORT_SYMBOL(kvm_mips_is_error_pfn);
uint32_t kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu)
@@ -53,21 +52,17 @@ uint32_t kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu)
return vcpu->arch.guest_kernel_asid[smp_processor_id()] & ASID_MASK;
}
-
uint32_t kvm_mips_get_user_asid(struct kvm_vcpu *vcpu)
{
return vcpu->arch.guest_user_asid[smp_processor_id()] & ASID_MASK;
}
-inline uint32_t kvm_mips_get_commpage_asid (struct kvm_vcpu *vcpu)
+inline uint32_t kvm_mips_get_commpage_asid(struct kvm_vcpu *vcpu)
{
return vcpu->kvm->arch.commpage_tlb;
}
-
-/*
- * Structure defining an tlb entry data set.
- */
+/* Structure defining an tlb entry data set. */
void kvm_mips_dump_host_tlbs(void)
{
@@ -116,6 +111,7 @@ void kvm_mips_dump_host_tlbs(void)
mtc0_tlbw_hazard();
local_irq_restore(flags);
}
+EXPORT_SYMBOL(kvm_mips_dump_host_tlbs);
void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu)
{
@@ -143,6 +139,7 @@ void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu)
(tlb.tlb_lo1 >> 3) & 7, tlb.tlb_mask);
}
}
+EXPORT_SYMBOL(kvm_mips_dump_guest_tlbs);
static int kvm_mips_map_page(struct kvm *kvm, gfn_t gfn)
{
@@ -152,7 +149,7 @@ static int kvm_mips_map_page(struct kvm *kvm, gfn_t gfn)
if (kvm->arch.guest_pmap[gfn] != KVM_INVALID_PAGE)
return 0;
- srcu_idx = srcu_read_lock(&kvm->srcu);
+ srcu_idx = srcu_read_lock(&kvm->srcu);
pfn = kvm_mips_gfn_to_pfn(kvm, gfn);
if (kvm_mips_is_error_pfn(pfn)) {
@@ -169,7 +166,7 @@ out:
/* Translate guest KSEG0 addresses to Host PA */
unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu,
- unsigned long gva)
+ unsigned long gva)
{
gfn_t gfn;
uint32_t offset = gva & ~PAGE_MASK;
@@ -194,12 +191,13 @@ unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu,
return (kvm->arch.guest_pmap[gfn] << PAGE_SHIFT) + offset;
}
+EXPORT_SYMBOL(kvm_mips_translate_guest_kseg0_to_hpa);
/* XXXKYMA: Must be called with interrupts disabled */
/* set flush_dcache_mask == 0 if no dcache flush required */
-int
-kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi,
- unsigned long entrylo0, unsigned long entrylo1, int flush_dcache_mask)
+int kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi,
+ unsigned long entrylo0, unsigned long entrylo1,
+ int flush_dcache_mask)
{
unsigned long flags;
unsigned long old_entryhi;
@@ -207,7 +205,6 @@ kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi,
local_irq_save(flags);
-
old_entryhi = read_c0_entryhi();
write_c0_entryhi(entryhi);
mtc0_tlbw_hazard();
@@ -240,12 +237,14 @@ kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi,
if (flush_dcache_mask) {
if (entrylo0 & MIPS3_PG_V) {
++vcpu->stat.flush_dcache_exits;
- flush_data_cache_page((entryhi & VPN2_MASK) & ~flush_dcache_mask);
+ flush_data_cache_page((entryhi & VPN2_MASK) &
+ ~flush_dcache_mask);
}
if (entrylo1 & MIPS3_PG_V) {
++vcpu->stat.flush_dcache_exits;
- flush_data_cache_page(((entryhi & VPN2_MASK) & ~flush_dcache_mask) |
- (0x1 << PAGE_SHIFT));
+ flush_data_cache_page(((entryhi & VPN2_MASK) &
+ ~flush_dcache_mask) |
+ (0x1 << PAGE_SHIFT));
}
}
@@ -257,10 +256,9 @@ kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi,
return 0;
}
-
/* XXXKYMA: Must be called with interrupts disabled */
int kvm_mips_handle_kseg0_tlb_fault(unsigned long badvaddr,
- struct kvm_vcpu *vcpu)
+ struct kvm_vcpu *vcpu)
{
gfn_t gfn;
pfn_t pfn0, pfn1;
@@ -270,7 +268,6 @@ int kvm_mips_handle_kseg0_tlb_fault(unsigned long badvaddr,
struct kvm *kvm = vcpu->kvm;
const int flush_dcache_mask = 0;
-
if (KVM_GUEST_KSEGX(badvaddr) != KVM_GUEST_KSEG0) {
kvm_err("%s: Invalid BadVaddr: %#lx\n", __func__, badvaddr);
kvm_mips_dump_host_tlbs();
@@ -302,14 +299,15 @@ int kvm_mips_handle_kseg0_tlb_fault(unsigned long badvaddr,
}
entryhi = (vaddr | kvm_mips_get_kernel_asid(vcpu));
- entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) | (1 << 2) |
- (0x1 << 1);
- entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | (0x3 << 3) | (1 << 2) |
- (0x1 << 1);
+ entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) |
+ (1 << 2) | (0x1 << 1);
+ entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | (0x3 << 3) |
+ (1 << 2) | (0x1 << 1);
return kvm_mips_host_tlb_write(vcpu, entryhi, entrylo0, entrylo1,
flush_dcache_mask);
}
+EXPORT_SYMBOL(kvm_mips_handle_kseg0_tlb_fault);
int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
struct kvm_vcpu *vcpu)
@@ -318,11 +316,10 @@ int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
unsigned long flags, old_entryhi = 0, vaddr = 0;
unsigned long entrylo0 = 0, entrylo1 = 0;
-
pfn0 = CPHYSADDR(vcpu->arch.kseg0_commpage) >> PAGE_SHIFT;
pfn1 = 0;
- entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) | (1 << 2) |
- (0x1 << 1);
+ entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) |
+ (1 << 2) | (0x1 << 1);
entrylo1 = 0;
local_irq_save(flags);
@@ -341,9 +338,9 @@ int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
mtc0_tlbw_hazard();
tlbw_use_hazard();
- kvm_debug ("@ %#lx idx: %2d [entryhi(R): %#lx] entrylo0 (R): 0x%08lx, entrylo1(R): 0x%08lx\n",
- vcpu->arch.pc, read_c0_index(), read_c0_entryhi(),
- read_c0_entrylo0(), read_c0_entrylo1());
+ kvm_debug("@ %#lx idx: %2d [entryhi(R): %#lx] entrylo0 (R): 0x%08lx, entrylo1(R): 0x%08lx\n",
+ vcpu->arch.pc, read_c0_index(), read_c0_entryhi(),
+ read_c0_entrylo0(), read_c0_entrylo1());
/* Restore old ASID */
write_c0_entryhi(old_entryhi);
@@ -353,28 +350,33 @@ int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
return 0;
}
+EXPORT_SYMBOL(kvm_mips_handle_commpage_tlb_fault);
-int
-kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu,
- struct kvm_mips_tlb *tlb, unsigned long *hpa0, unsigned long *hpa1)
+int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu,
+ struct kvm_mips_tlb *tlb,
+ unsigned long *hpa0,
+ unsigned long *hpa1)
{
unsigned long entryhi = 0, entrylo0 = 0, entrylo1 = 0;
struct kvm *kvm = vcpu->kvm;
pfn_t pfn0, pfn1;
-
if ((tlb->tlb_hi & VPN2_MASK) == 0) {
pfn0 = 0;
pfn1 = 0;
} else {
- if (kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo0) >> PAGE_SHIFT) < 0)
+ if (kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo0)
+ >> PAGE_SHIFT) < 0)
return -1;
- if (kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo1) >> PAGE_SHIFT) < 0)
+ if (kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo1)
+ >> PAGE_SHIFT) < 0)
return -1;
- pfn0 = kvm->arch.guest_pmap[mips3_tlbpfn_to_paddr(tlb->tlb_lo0) >> PAGE_SHIFT];
- pfn1 = kvm->arch.guest_pmap[mips3_tlbpfn_to_paddr(tlb->tlb_lo1) >> PAGE_SHIFT];
+ pfn0 = kvm->arch.guest_pmap[mips3_tlbpfn_to_paddr(tlb->tlb_lo0)
+ >> PAGE_SHIFT];
+ pfn1 = kvm->arch.guest_pmap[mips3_tlbpfn_to_paddr(tlb->tlb_lo1)
+ >> PAGE_SHIFT];
}
if (hpa0)
@@ -385,11 +387,12 @@ kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu,
/* Get attributes from the Guest TLB */
entryhi = (tlb->tlb_hi & VPN2_MASK) | (KVM_GUEST_KERNEL_MODE(vcpu) ?
- kvm_mips_get_kernel_asid(vcpu) : kvm_mips_get_user_asid(vcpu));
+ kvm_mips_get_kernel_asid(vcpu) :
+ kvm_mips_get_user_asid(vcpu));
entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) |
- (tlb->tlb_lo0 & MIPS3_PG_D) | (tlb->tlb_lo0 & MIPS3_PG_V);
+ (tlb->tlb_lo0 & MIPS3_PG_D) | (tlb->tlb_lo0 & MIPS3_PG_V);
entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | (0x3 << 3) |
- (tlb->tlb_lo1 & MIPS3_PG_D) | (tlb->tlb_lo1 & MIPS3_PG_V);
+ (tlb->tlb_lo1 & MIPS3_PG_D) | (tlb->tlb_lo1 & MIPS3_PG_V);
kvm_debug("@ %#lx tlb_lo0: 0x%08lx tlb_lo1: 0x%08lx\n", vcpu->arch.pc,
tlb->tlb_lo0, tlb->tlb_lo1);
@@ -397,6 +400,7 @@ kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu,
return kvm_mips_host_tlb_write(vcpu, entryhi, entrylo0, entrylo1,
tlb->tlb_mask);
}
+EXPORT_SYMBOL(kvm_mips_handle_mapped_seg_tlb_fault);
int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long entryhi)
{
@@ -404,10 +408,9 @@ int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long entryhi)
int index = -1;
struct kvm_mips_tlb *tlb = vcpu->arch.guest_tlb;
-
for (i = 0; i < KVM_MIPS_GUEST_TLB_SIZE; i++) {
- if (((TLB_VPN2(tlb[i]) & ~tlb[i].tlb_mask) == ((entryhi & VPN2_MASK) & ~tlb[i].tlb_mask)) &&
- (TLB_IS_GLOBAL(tlb[i]) || (TLB_ASID(tlb[i]) == (entryhi & ASID_MASK)))) {
+ if (TLB_HI_VPN2_HIT(tlb[i], entryhi) &&
+ TLB_HI_ASID_HIT(tlb[i], entryhi)) {
index = i;
break;
}
@@ -418,21 +421,23 @@ int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long entryhi)
return index;
}
+EXPORT_SYMBOL(kvm_mips_guest_tlb_lookup);
int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr)
{
unsigned long old_entryhi, flags;
volatile int idx;
-
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
if (KVM_GUEST_KERNEL_MODE(vcpu))
- write_c0_entryhi((vaddr & VPN2_MASK) | kvm_mips_get_kernel_asid(vcpu));
+ write_c0_entryhi((vaddr & VPN2_MASK) |
+ kvm_mips_get_kernel_asid(vcpu));
else {
- write_c0_entryhi((vaddr & VPN2_MASK) | kvm_mips_get_user_asid(vcpu));
+ write_c0_entryhi((vaddr & VPN2_MASK) |
+ kvm_mips_get_user_asid(vcpu));
}
mtc0_tlbw_hazard();
@@ -452,6 +457,7 @@ int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr)
return idx;
}
+EXPORT_SYMBOL(kvm_mips_host_tlb_lookup);
int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long va)
{
@@ -460,7 +466,6 @@ int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long va)
local_irq_save(flags);
-
old_entryhi = read_c0_entryhi();
write_c0_entryhi((va & VPN2_MASK) | kvm_mips_get_user_asid(vcpu));
@@ -499,8 +504,9 @@ int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long va)
return 0;
}
+EXPORT_SYMBOL(kvm_mips_host_tlb_inv);
-/* XXXKYMA: Fix Guest USER/KERNEL no longer share the same ASID*/
+/* XXXKYMA: Fix Guest USER/KERNEL no longer share the same ASID */
int kvm_mips_host_tlb_inv_index(struct kvm_vcpu *vcpu, int index)
{
unsigned long flags, old_entryhi;
@@ -510,7 +516,6 @@ int kvm_mips_host_tlb_inv_index(struct kvm_vcpu *vcpu, int index)
local_irq_save(flags);
-
old_entryhi = read_c0_entryhi();
write_c0_entryhi(UNIQUE_ENTRYHI(index));
@@ -546,7 +551,6 @@ void kvm_mips_flush_host_tlb(int skip_kseg0)
int entry = 0;
int maxentry = current_cpu_data.tlbsize;
-
local_irq_save(flags);
old_entryhi = read_c0_entryhi();
@@ -554,7 +558,6 @@ void kvm_mips_flush_host_tlb(int skip_kseg0)
/* Blast 'em all away. */
for (entry = 0; entry < maxentry; entry++) {
-
write_c0_index(entry);
mtc0_tlbw_hazard();
@@ -565,9 +568,8 @@ void kvm_mips_flush_host_tlb(int skip_kseg0)
entryhi = read_c0_entryhi();
/* Don't blow away guest kernel entries */
- if (KVM_GUEST_KSEGX(entryhi) == KVM_GUEST_KSEG0) {
+ if (KVM_GUEST_KSEGX(entryhi) == KVM_GUEST_KSEG0)
continue;
- }
}
/* Make sure all entries differ. */
@@ -591,17 +593,17 @@ void kvm_mips_flush_host_tlb(int skip_kseg0)
local_irq_restore(flags);
}
+EXPORT_SYMBOL(kvm_mips_flush_host_tlb);
-void
-kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu,
- struct kvm_vcpu *vcpu)
+void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu,
+ struct kvm_vcpu *vcpu)
{
unsigned long asid = asid_cache(cpu);
- if (!((asid += ASID_INC) & ASID_MASK)) {
- if (cpu_has_vtag_icache) {
+ asid += ASID_INC;
+ if (!(asid & ASID_MASK)) {
+ if (cpu_has_vtag_icache)
flush_icache_all();
- }
kvm_local_flush_tlb_all(); /* start new asid cycle */
@@ -639,6 +641,7 @@ void kvm_local_flush_tlb_all(void)
local_irq_restore(flags);
}
+EXPORT_SYMBOL(kvm_local_flush_tlb_all);
/**
* kvm_mips_migrate_count() - Migrate timer.
@@ -699,7 +702,10 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
}
if (!newasid) {
- /* If we preempted while the guest was executing, then reload the pre-empted ASID */
+ /*
+ * If we preempted while the guest was executing, then reload
+ * the pre-empted ASID
+ */
if (current->flags & PF_VCPU) {
write_c0_entryhi(vcpu->arch.
preempt_entryhi & ASID_MASK);
@@ -708,9 +714,10 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
} else {
/* New ASIDs were allocated for the VM */
- /* Were we in guest context? If so then the pre-empted ASID is no longer
- * valid, we need to set it to what it should be based on the mode of
- * the Guest (Kernel/User)
+ /*
+ * Were we in guest context? If so then the pre-empted ASID is
+ * no longer valid, we need to set it to what it should be based
+ * on the mode of the Guest (Kernel/User)
*/
if (current->flags & PF_VCPU) {
if (KVM_GUEST_KERNEL_MODE(vcpu))
@@ -728,6 +735,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
local_irq_restore(flags);
}
+EXPORT_SYMBOL(kvm_arch_vcpu_load);
/* ASID can change if another task is scheduled during preemption */
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
@@ -739,7 +747,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
cpu = smp_processor_id();
-
vcpu->arch.preempt_entryhi = read_c0_entryhi();
vcpu->arch.last_sched_cpu = cpu;
@@ -754,11 +761,12 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
local_irq_restore(flags);
}
+EXPORT_SYMBOL(kvm_arch_vcpu_put);
uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu)
{
struct mips_coproc *cop0 = vcpu->arch.cop0;
- unsigned long paddr, flags;
+ unsigned long paddr, flags, vpn2, asid;
uint32_t inst;
int index;
@@ -769,16 +777,12 @@ uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu)
if (index >= 0) {
inst = *(opc);
} else {
- index =
- kvm_mips_guest_tlb_lookup(vcpu,
- ((unsigned long) opc & VPN2_MASK)
- |
- (kvm_read_c0_guest_entryhi
- (cop0) & ASID_MASK));
+ vpn2 = (unsigned long) opc & VPN2_MASK;
+ asid = kvm_read_c0_guest_entryhi(cop0) & ASID_MASK;
+ index = kvm_mips_guest_tlb_lookup(vcpu, vpn2 | asid);
if (index < 0) {
- kvm_err
- ("%s: get_user_failed for %p, vcpu: %p, ASID: %#lx\n",
- __func__, opc, vcpu, read_c0_entryhi());
+ kvm_err("%s: get_user_failed for %p, vcpu: %p, ASID: %#lx\n",
+ __func__, opc, vcpu, read_c0_entryhi());
kvm_mips_dump_host_tlbs();
local_irq_restore(flags);
return KVM_INVALID_INST;
@@ -793,7 +797,7 @@ uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu)
} else if (KVM_GUEST_KSEGX(opc) == KVM_GUEST_KSEG0) {
paddr =
kvm_mips_translate_guest_kseg0_to_hpa(vcpu,
- (unsigned long) opc);
+ (unsigned long) opc);
inst = *(uint32_t *) CKSEG0ADDR(paddr);
} else {
kvm_err("%s: illegal address: %p\n", __func__, opc);
@@ -802,18 +806,4 @@ uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu)
return inst;
}
-
-EXPORT_SYMBOL(kvm_local_flush_tlb_all);
-EXPORT_SYMBOL(kvm_mips_handle_mapped_seg_tlb_fault);
-EXPORT_SYMBOL(kvm_mips_handle_commpage_tlb_fault);
-EXPORT_SYMBOL(kvm_mips_dump_host_tlbs);
-EXPORT_SYMBOL(kvm_mips_handle_kseg0_tlb_fault);
-EXPORT_SYMBOL(kvm_mips_host_tlb_lookup);
-EXPORT_SYMBOL(kvm_mips_flush_host_tlb);
-EXPORT_SYMBOL(kvm_mips_guest_tlb_lookup);
-EXPORT_SYMBOL(kvm_mips_host_tlb_inv);
-EXPORT_SYMBOL(kvm_mips_translate_guest_kseg0_to_hpa);
-EXPORT_SYMBOL(kvm_mips_dump_guest_tlbs);
EXPORT_SYMBOL(kvm_get_inst);
-EXPORT_SYMBOL(kvm_arch_vcpu_load);
-EXPORT_SYMBOL(kvm_arch_vcpu_put);
diff --git a/arch/mips/kvm/kvm_trap_emul.c b/arch/mips/kvm/kvm_trap_emul.c
index 693f952..baf6577 100644
--- a/arch/mips/kvm/kvm_trap_emul.c
+++ b/arch/mips/kvm/kvm_trap_emul.c
@@ -1,13 +1,13 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* KVM/MIPS: Deliver/Emulate exceptions to the guest kernel
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * KVM/MIPS: Deliver/Emulate exceptions to the guest kernel
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
#include <linux/errno.h>
#include <linux/err.h>
@@ -37,7 +37,6 @@ static gpa_t kvm_trap_emul_gva_to_gpa_cb(gva_t gva)
return gpa;
}
-
static int kvm_trap_emul_handle_cop_unusable(struct kvm_vcpu *vcpu)
{
struct kvm_run *run = vcpu->run;
@@ -46,9 +45,9 @@ static int kvm_trap_emul_handle_cop_unusable(struct kvm_vcpu *vcpu)
enum emulation_result er = EMULATE_DONE;
int ret = RESUME_GUEST;
- if (((cause & CAUSEF_CE) >> CAUSEB_CE) == 1) {
+ if (((cause & CAUSEF_CE) >> CAUSEB_CE) == 1)
er = kvm_mips_emulate_fpu_exc(cause, opc, run, vcpu);
- } else
+ else
er = kvm_mips_emulate_inst(cause, opc, run, vcpu);
switch (er) {
@@ -83,9 +82,8 @@ static int kvm_trap_emul_handle_tlb_mod(struct kvm_vcpu *vcpu)
if (KVM_GUEST_KSEGX(badvaddr) < KVM_GUEST_KSEG0
|| KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG23) {
- kvm_debug
- ("USER/KSEG23 ADDR TLB MOD fault: cause %#lx, PC: %p, BadVaddr: %#lx\n",
- cause, opc, badvaddr);
+ kvm_debug("USER/KSEG23 ADDR TLB MOD fault: cause %#lx, PC: %p, BadVaddr: %#lx\n",
+ cause, opc, badvaddr);
er = kvm_mips_handle_tlbmod(cause, opc, run, vcpu);
if (er == EMULATE_DONE)
@@ -95,8 +93,10 @@ static int kvm_trap_emul_handle_tlb_mod(struct kvm_vcpu *vcpu)
ret = RESUME_HOST;
}
} else if (KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG0) {
- /* XXXKYMA: The guest kernel does not expect to get this fault when we are not
- * using HIGHMEM. Need to address this in a HIGHMEM kernel
+ /*
+ * XXXKYMA: The guest kernel does not expect to get this fault
+ * when we are not using HIGHMEM. Need to address this in a
+ * HIGHMEM kernel
*/
printk
("TLB MOD fault not handled, cause %#lx, PC: %p, BadVaddr: %#lx\n",
@@ -134,9 +134,8 @@ static int kvm_trap_emul_handle_tlb_st_miss(struct kvm_vcpu *vcpu)
}
} else if (KVM_GUEST_KSEGX(badvaddr) < KVM_GUEST_KSEG0
|| KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG23) {
- kvm_debug
- ("USER ADDR TLB LD fault: cause %#lx, PC: %p, BadVaddr: %#lx\n",
- cause, opc, badvaddr);
+ kvm_debug("USER ADDR TLB LD fault: cause %#lx, PC: %p, BadVaddr: %#lx\n",
+ cause, opc, badvaddr);
er = kvm_mips_handle_tlbmiss(cause, opc, run, vcpu);
if (er == EMULATE_DONE)
ret = RESUME_GUEST;
@@ -145,8 +144,9 @@ static int kvm_trap_emul_handle_tlb_st_miss(struct kvm_vcpu *vcpu)
ret = RESUME_HOST;
}
} else if (KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG0) {
- /* All KSEG0 faults are handled by KVM, as the guest kernel does not
- * expect to ever get them
+ /*
+ * All KSEG0 faults are handled by KVM, as the guest kernel does
+ * not expect to ever get them
*/
if (kvm_mips_handle_kseg0_tlb_fault
(vcpu->arch.host_cp0_badvaddr, vcpu) < 0) {
@@ -154,9 +154,8 @@ static int kvm_trap_emul_handle_tlb_st_miss(struct kvm_vcpu *vcpu)
ret = RESUME_HOST;
}
} else {
- kvm_err
- ("Illegal TLB LD fault address , cause %#lx, PC: %p, BadVaddr: %#lx\n",
- cause, opc, badvaddr);
+ kvm_err("Illegal TLB LD fault address , cause %#lx, PC: %p, BadVaddr: %#lx\n",
+ cause, opc, badvaddr);
kvm_mips_dump_host_tlbs();
kvm_arch_vcpu_dump_regs(vcpu);
run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
@@ -186,10 +185,12 @@ static int kvm_trap_emul_handle_tlb_ld_miss(struct kvm_vcpu *vcpu)
vcpu->arch.pc, badvaddr);
/* User Address (UA) fault, this could happen if
- * (1) TLB entry not present/valid in both Guest and shadow host TLBs, in this
- * case we pass on the fault to the guest kernel and let it handle it.
- * (2) TLB entry is present in the Guest TLB but not in the shadow, in this
- * case we inject the TLB from the Guest TLB into the shadow host TLB
+ * (1) TLB entry not present/valid in both Guest and shadow host
+ * TLBs, in this case we pass on the fault to the guest
+ * kernel and let it handle it.
+ * (2) TLB entry is present in the Guest TLB but not in the
+ * shadow, in this case we inject the TLB from the Guest TLB
+ * into the shadow host TLB
*/
er = kvm_mips_handle_tlbmiss(cause, opc, run, vcpu);
@@ -349,9 +350,9 @@ static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu)
uint32_t config1;
int vcpu_id = vcpu->vcpu_id;
- /* Arch specific stuff, set up config registers properly so that the
- * guest will come up as expected, for now we simulate a
- * MIPS 24kc
+ /*
+ * Arch specific stuff, set up config registers properly so that the
+ * guest will come up as expected, for now we simulate a MIPS 24kc
*/
kvm_write_c0_guest_prid(cop0, 0x00019300);
kvm_write_c0_guest_config(cop0,
@@ -373,14 +374,15 @@ static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu)
kvm_write_c0_guest_config2(cop0, MIPS_CONFIG2);
/* MIPS_CONFIG2 | (read_c0_config2() & 0xfff) */
- kvm_write_c0_guest_config3(cop0,
- MIPS_CONFIG3 | (0 << CP0C3_VInt) | (1 <<
- CP0C3_ULRI));
+ kvm_write_c0_guest_config3(cop0, MIPS_CONFIG3 | (0 << CP0C3_VInt) |
+ (1 << CP0C3_ULRI));
/* Set Wait IE/IXMT Ignore in Config7, IAR, AR */
kvm_write_c0_guest_config7(cop0, (MIPS_CONF7_WII) | (1 << 10));
- /* Setup IntCtl defaults, compatibilty mode for timer interrupts (HW5) */
+ /*
+ * Setup IntCtl defaults, compatibilty mode for timer interrupts (HW5)
+ */
kvm_write_c0_guest_intctl(cop0, 0xFC000000);
/* Put in vcpu id as CPUNum into Ebase Reg to handle SMP Guests */
diff --git a/arch/mips/kvm/trace.h b/arch/mips/kvm/trace.h
index bc9e0f4..c1388d4 100644
--- a/arch/mips/kvm/trace.h
+++ b/arch/mips/kvm/trace.h
@@ -1,11 +1,11 @@
/*
-* This file is subject to the terms and conditions of the GNU General Public
-* License. See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
-* Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved.
+ * Authors: Sanjay Lal <sanjayl@xxxxxxxxxxx>
+ */
#if !defined(_TRACE_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_KVM_H
@@ -17,9 +17,7 @@
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE trace
-/*
- * Tracepoints for VM eists
- */
+/* Tracepoints for VM eists */
extern char *kvm_mips_exit_types_str[MAX_KVM_MIPS_EXIT_TYPES];
TRACE_EVENT(kvm_exit,
--
1.8.5.3
--
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