The patch titled
KVM: make the guest debugger an arch operation
has been added to the -mm tree. Its filename is
kvm-make-the-guest-debugger-an-arch-operation.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: KVM: make the guest debugger an arch operation
From: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/kvm/kvm.h | 3 ++
drivers/kvm/kvm_main.c | 43 ++++--------------------------------
drivers/kvm/vmx.c | 46 +++++++++++++++++++++++++++++++++++++++
3 files changed, 54 insertions(+), 38 deletions(-)
diff -puN drivers/kvm/kvm.h~kvm-make-the-guest-debugger-an-arch-operation drivers/kvm/kvm.h
--- a/drivers/kvm/kvm.h~kvm-make-the-guest-debugger-an-arch-operation
+++ a/drivers/kvm/kvm.h
@@ -242,6 +242,9 @@ struct kvm_arch_ops {
void (*hardware_disable)(void *dummy);
int (*hardware_setup)(void); /* __init */
void (*hardware_unsetup)(void); /* __exit */
+
+ int (*set_guest_debug)(struct kvm_vcpu *vcpu,
+ struct kvm_debug_guest *dbg);
};
extern struct kvm_stat kvm_stat;
diff -puN drivers/kvm/kvm_main.c~kvm-make-the-guest-debugger-an-arch-operation drivers/kvm/kvm_main.c
--- a/drivers/kvm/kvm_main.c~kvm-make-the-guest-debugger-an-arch-operation
+++ a/drivers/kvm/kvm_main.c
@@ -611,6 +611,7 @@ unsigned long vmcs_readl(unsigned long f
: "=a"(value) : "d"(field) : "cc");
return value;
}
+EXPORT_SYMBOL_GPL(vmcs_readl);
void vmcs_writel(unsigned long field, unsigned long value)
{
@@ -622,6 +623,7 @@ void vmcs_writel(unsigned long field, un
printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
}
+EXPORT_SYMBOL_GPL(vmcs_writel);
static void vmcs_write16(unsigned long field, u16 value)
{
@@ -3230,9 +3232,7 @@ static int kvm_dev_ioctl_debug_guest(str
struct kvm_debug_guest *dbg)
{
struct kvm_vcpu *vcpu;
- unsigned long dr7 = 0x400;
- u32 exception_bitmap;
- int old_singlestep;
+ int r;
if (dbg->vcpu < 0 || dbg->vcpu >= KVM_MAX_VCPUS)
return -EINVAL;
@@ -3240,44 +3240,11 @@ static int kvm_dev_ioctl_debug_guest(str
if (!vcpu)
return -ENOENT;
- exception_bitmap = vmcs_read32(EXCEPTION_BITMAP);
- old_singlestep = vcpu->guest_debug.singlestep;
-
- vcpu->guest_debug.enabled = dbg->enabled;
- if (vcpu->guest_debug.enabled) {
- int i;
-
- dr7 |= 0x200; /* exact */
- for (i = 0; i < 4; ++i) {
- if (!dbg->breakpoints[i].enabled)
- continue;
- vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
- dr7 |= 2 << (i*2); /* global enable */
- dr7 |= 0 << (i*4+16); /* execution breakpoint */
- }
-
- exception_bitmap |= (1u << 1); /* Trap debug exceptions */
-
- vcpu->guest_debug.singlestep = dbg->singlestep;
- } else {
- exception_bitmap &= ~(1u << 1); /* Ignore debug exceptions */
- vcpu->guest_debug.singlestep = 0;
- }
-
- if (old_singlestep && !vcpu->guest_debug.singlestep) {
- unsigned long flags;
-
- flags = vmcs_readl(GUEST_RFLAGS);
- flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
- vmcs_writel(GUEST_RFLAGS, flags);
- }
-
- vmcs_write32(EXCEPTION_BITMAP, exception_bitmap);
- vmcs_writel(GUEST_DR7, dr7);
+ r = kvm_arch_ops->set_guest_debug(vcpu, dbg);
vcpu_put(vcpu);
- return 0;
+ return r;
}
static long kvm_dev_ioctl(struct file *filp,
diff -puN drivers/kvm/vmx.c~kvm-make-the-guest-debugger-an-arch-operation drivers/kvm/vmx.c
--- a/drivers/kvm/vmx.c~kvm-make-the-guest-debugger-an-arch-operation
+++ a/drivers/kvm/vmx.c
@@ -31,6 +31,50 @@ extern struct vmcs_descriptor {
u32 revision_id;
} vmcs_descriptor;
+static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
+{
+ unsigned long dr7 = 0x400;
+ u32 exception_bitmap;
+ int old_singlestep;
+
+ exception_bitmap = vmcs_read32(EXCEPTION_BITMAP);
+ old_singlestep = vcpu->guest_debug.singlestep;
+
+ vcpu->guest_debug.enabled = dbg->enabled;
+ if (vcpu->guest_debug.enabled) {
+ int i;
+
+ dr7 |= 0x200; /* exact */
+ for (i = 0; i < 4; ++i) {
+ if (!dbg->breakpoints[i].enabled)
+ continue;
+ vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
+ dr7 |= 2 << (i*2); /* global enable */
+ dr7 |= 0 << (i*4+16); /* execution breakpoint */
+ }
+
+ exception_bitmap |= (1u << 1); /* Trap debug exceptions */
+
+ vcpu->guest_debug.singlestep = dbg->singlestep;
+ } else {
+ exception_bitmap &= ~(1u << 1); /* Ignore debug exceptions */
+ vcpu->guest_debug.singlestep = 0;
+ }
+
+ if (old_singlestep && !vcpu->guest_debug.singlestep) {
+ unsigned long flags;
+
+ flags = vmcs_readl(GUEST_RFLAGS);
+ flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
+ vmcs_writel(GUEST_RFLAGS, flags);
+ }
+
+ vmcs_write32(EXCEPTION_BITMAP, exception_bitmap);
+ vmcs_writel(GUEST_DR7, dr7);
+
+ return 0;
+}
+
static __init int cpu_has_kvm_support(void)
{
unsigned long ecx = cpuid_ecx(1);
@@ -123,6 +167,8 @@ static struct kvm_arch_ops vmx_arch_ops
.hardware_unsetup = hardware_unsetup,
.hardware_enable = hardware_enable,
.hardware_disable = hardware_disable,
+
+ .set_guest_debug = set_guest_debug,
};
static int __init vmx_init(void)
_
Patches currently in -mm which might be from avi@xxxxxxxxxxxx are
kvm-userspace-interface.patch
kvm-userspace-interface-make-enum-values-in-userspace-interface-explicit.patch
kvm-intel-virtual-mode-extensions-definitions.patch
kvm-kvm-data-structures.patch
kvm-random-accessors-and-constants.patch
kvm-virtualization-infrastructure.patch
kvm-virtualization-infrastructure-kvm-fix-guest-cr4-corruption.patch
kvm-virtualization-infrastructure-include-desch.patch
kvm-virtualization-infrastructure-fix-segment-state-changes-across-processor-mode-switches.patch
kvm-virtualization-infrastructure-fix-asm-constraints-for-segment-loads.patch
kvm-virtualization-infrastructure-fix-mmu-reset-locking-when-setting-cr0.patch
kvm-memory-slot-management.patch
kvm-vcpu-creation-and-maintenance.patch
kvm-vcpu-creation-and-maintenance-segment-access-cleanup.patch
kvm-workaround-cr0cd-cache-disable-bit-leak-from-guest-to.patch
kvm-vcpu-execution-loop.patch
kvm-define-exit-handlers.patch
kvm-define-exit-handlers-pass-fs-gs-segment-bases-to-x86-emulator.patch
kvm-less-common-exit-handlers.patch
kvm-less-common-exit-handlers-handle-rdmsrmsr_efer.patch
kvm-mmu.patch
kvm-x86-emulator.patch
kvm-clarify-licensing.patch
kvm-x86-emulator-fix-emulator-mov-cr-decoding.patch
kvm-plumbing.patch
kvm-dynamically-determine-which-msrs-to-load-and-save.patch
kvm-fix-calculation-of-initial-value-of-rdx-register.patch
kvm-avoid-using-vmx-instruction-directly.patch
kvm-avoid-using-vmx-instruction-directly-fix-asm-constraints.patch
kvm-expose-interrupt-bitmap.patch
kvm-add-time-stamp-counter-msr-and-accessors.patch
kvm-expose-msrs-to-userspace.patch
kvm-expose-msrs-to-userspace-v2.patch
kvm-create-kvm-intelko-module.patch
kvm-make-dev-registration-happen-when-the-arch.patch
kvm-make-hardware-detection-an-arch-operation.patch
kvm-make-the-per-cpu-enable-disable-functions-arch.patch
kvm-make-the-hardware-setup-operations-non-percpu.patch
kvm-make-the-guest-debugger-an-arch-operation.patch
kvm-make-msr-accessors-arch-operations.patch
kvm-make-the-segment-accessors-arch-operations.patch
kvm-cache-guest-cr4-in-vcpu-structure.patch
kvm-cache-guest-cr0-in-vcpu-structure.patch
kvm-add-get_segment_base-arch-accessor.patch
kvm-add-idt-and-gdt-descriptor-accessors.patch
kvm-make-syncing-the-register-file-to-the-vcpu.patch
kvm-make-the-vcpu-execution-loop-an-arch-operation.patch
kvm-move-the-vmx-exit-handlers-to-vmxc.patch
kvm-make-vcpu_setup-an-arch-operation.patch
kvm-make-__set_cr0-and-dependencies-arch-operations.patch
kvm-make-__set_cr4-an-arch-operation.patch
kvm-make-__set_efer-an-arch-operation.patch
kvm-make-set_cr3-and-tlb-flushing-arch-operations.patch
kvm-make-inject_page_fault-an-arch-operation.patch
kvm-make-inject_gp-an-arch-operation.patch
kvm-use-the-idt-and-gdt-accessors-in-realmode-emulation.patch
kvm-use-the-general-purpose-register-accessors-rather.patch
kvm-move-the-vmx-tsc-accessors-to-vmxc.patch
kvm-access-rflags-through-an-arch-operation.patch
kvm-move-the-vmx-segment-field-definitions-to-vmxc.patch
kvm-add-an-arch-accessor-for-cs-d-b-and-l-bits.patch
kvm-add-a-set_cr0_no_modeswitch-arch-accessor.patch
kvm-make-vcpu_load-and-vcpu_put-arch-operations.patch
kvm-make-vcpu-creation-and-destruction-arch-operations.patch
kvm-move-vmcs-static-variables-to-vmxc.patch
kvm-make-is_long_mode-an-arch-operation.patch
kvm-use-the-tlb-flush-arch-operation-instead-of-an.patch
kvm-remove-guest_cpl.patch
kvm-move-vmcs-accessors-to-vmxc.patch
kvm-move-vmx-helper-inlines-to-vmxc.patch
kvm-remove-vmx-includes-from-arch-independent-code.patch
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