DCR handling was only needed for 440 KVM. Since we removed it, we can also
remove handling of DCR accesses.
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
---
Documentation/virtual/kvm/api.txt | 6 +++---
arch/powerpc/include/asm/kvm_host.h | 4 ----
arch/powerpc/include/asm/kvm_ppc.h | 1 -
arch/powerpc/kvm/booke.c | 5 -----
arch/powerpc/kvm/powerpc.c | 10 ----------
arch/powerpc/kvm/timing.c | 1 -
arch/powerpc/kvm/timing.h | 3 ---
include/uapi/linux/kvm.h | 4 ++--
8 files changed, 5 insertions(+), 29 deletions(-)
diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
index 8898caf..a21ff22 100644
--- a/Documentation/virtual/kvm/api.txt
+++ b/Documentation/virtual/kvm/api.txt
@@ -2613,8 +2613,8 @@ The 'data' member contains, in its first 'len' bytes, the value as it would
appear if the VCPU performed a load or store of the appropriate width directly
to the byte array.
-NOTE: For KVM_EXIT_IO, KVM_EXIT_MMIO, KVM_EXIT_OSI, KVM_EXIT_DCR,
- KVM_EXIT_PAPR and KVM_EXIT_EPR the corresponding
+NOTE: For KVM_EXIT_IO, KVM_EXIT_MMIO, KVM_EXIT_OSI KVM_EXIT_PAPR and
+ KVM_EXIT_EPR the corresponding
operations are complete (and guest state is consistent) only after userspace
has re-entered the kernel with KVM_RUN. The kernel side will first finish
incomplete operations and then check for pending signals. Userspace
@@ -2685,7 +2685,7 @@ Principles of Operation Book in the Chapter for Dynamic Address Translation
__u8 is_write;
} dcr;
-powerpc specific.
+Deprecated - was used for 440 KVM.
/* KVM_EXIT_OSI */
struct {
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 66f5b59..98d9dd5 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -94,7 +94,6 @@ struct kvm_vm_stat {
struct kvm_vcpu_stat {
u32 sum_exits;
u32 mmio_exits;
- u32 dcr_exits;
u32 signal_exits;
u32 light_exits;
/* Account for special types of light exits: */
@@ -126,7 +125,6 @@ struct kvm_vcpu_stat {
enum kvm_exit_types {
MMIO_EXITS,
- DCR_EXITS,
SIGNAL_EXITS,
ITLB_REAL_MISS_EXITS,
ITLB_VIRT_MISS_EXITS,
@@ -601,8 +599,6 @@ struct kvm_vcpu_arch {
u8 io_gpr; /* GPR used as IO source/target */
u8 mmio_is_bigendian;
u8 mmio_sign_extend;
- u8 dcr_needed;
- u8 dcr_is_write;
u8 osi_needed;
u8 osi_enabled;
u8 papr_enabled;
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index cbee453..8e36c1e 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -41,7 +41,6 @@
enum emulation_result {
EMULATE_DONE, /* no further processing */
EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
- EMULATE_DO_DCR, /* kvm_run filled with DCR request */
EMULATE_FAIL, /* can't emulate this instruction */
EMULATE_AGAIN, /* something went wrong. go again */
EMULATE_EXIT_USER, /* emulation requires exit to user-space */
diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
index f30948a..b4c89fa 100644
--- a/arch/powerpc/kvm/booke.c
+++ b/arch/powerpc/kvm/booke.c
@@ -51,7 +51,6 @@ unsigned long kvmppc_booke_handlers;
struct kvm_stats_debugfs_item debugfs_entries[] = {
{ "mmio", VCPU_STAT(mmio_exits) },
- { "dcr", VCPU_STAT(dcr_exits) },
{ "sig", VCPU_STAT(signal_exits) },
{ "itlb_r", VCPU_STAT(itlb_real_miss_exits) },
{ "itlb_v", VCPU_STAT(itlb_virt_miss_exits) },
@@ -709,10 +708,6 @@ static int emulation_exit(struct kvm_run *run, struct kvm_vcpu *vcpu)
case EMULATE_AGAIN:
return RESUME_GUEST;
- case EMULATE_DO_DCR:
- run->exit_reason = KVM_EXIT_DCR;
- return RESUME_HOST;
-
case EMULATE_FAIL:
printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
__func__, vcpu->arch.pc, vcpu->arch.last_inst);
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index c14ed15..288b4bb 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -743,12 +743,6 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
#endif
}
-static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
- struct kvm_run *run)
-{
- kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
-}
-
static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
struct kvm_run *run)
{
@@ -945,10 +939,6 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
if (!vcpu->mmio_is_write)
kvmppc_complete_mmio_load(vcpu, run);
vcpu->mmio_needed = 0;
- } else if (vcpu->arch.dcr_needed) {
- if (!vcpu->arch.dcr_is_write)
- kvmppc_complete_dcr_load(vcpu, run);
- vcpu->arch.dcr_needed = 0;
} else if (vcpu->arch.osi_needed) {
u64 *gprs = run->osi.gprs;
int i;
diff --git a/arch/powerpc/kvm/timing.c b/arch/powerpc/kvm/timing.c
index 07b6110..e44d2b2 100644
--- a/arch/powerpc/kvm/timing.c
+++ b/arch/powerpc/kvm/timing.c
@@ -110,7 +110,6 @@ void kvmppc_update_timing_stats(struct kvm_vcpu *vcpu)
static const char *kvm_exit_names[__NUMBER_OF_KVM_EXIT_TYPES] = {
[MMIO_EXITS] = "MMIO",
- [DCR_EXITS] = "DCR",
[SIGNAL_EXITS] = "SIGNAL",
[ITLB_REAL_MISS_EXITS] = "ITLBREAL",
[ITLB_VIRT_MISS_EXITS] = "ITLBVIRT",
diff --git a/arch/powerpc/kvm/timing.h b/arch/powerpc/kvm/timing.h
index bf191e7..3123690 100644
--- a/arch/powerpc/kvm/timing.h
+++ b/arch/powerpc/kvm/timing.h
@@ -63,9 +63,6 @@ static inline void kvmppc_account_exit_stat(struct kvm_vcpu *vcpu, int type)
case EMULATED_INST_EXITS:
vcpu->stat.emulated_inst_exits++;
break;
- case DCR_EXITS:
- vcpu->stat.dcr_exits++;
- break;
case DSI_EXITS:
vcpu->stat.dsi_exits++;
break;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 51776ca..f6f24ae 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -162,7 +162,7 @@ struct kvm_pit_config {
#define KVM_EXIT_TPR_ACCESS 12
#define KVM_EXIT_S390_SIEIC 13
#define KVM_EXIT_S390_RESET 14
-#define KVM_EXIT_DCR 15
+#define KVM_EXIT_DCR 15 /* deprecated */
#define KVM_EXIT_NMI 16
#define KVM_EXIT_INTERNAL_ERROR 17
#define KVM_EXIT_OSI 18
@@ -268,7 +268,7 @@ struct kvm_run {
__u64 trans_exc_code;
__u32 pgm_code;
} s390_ucontrol;
- /* KVM_EXIT_DCR */
+ /* KVM_EXIT_DCR (deprecated) */
struct {
__u32 dcrn;
__u32 data;
--
1.8.1.4
--
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