The leagcy pmu_ops->msr_idx_to_pmc is only called in kvm_pmu_rdpmc, so
this name is restrictedly limited to rdpmc_idx which could be indexed
exactly to a kvm_pmc. Let's restrict its semantic by renaming the
existing msr_idx_to_pmc to rdpmc_idx_to_pmc, and is_valid_msr_idx to
is_valid_rdpmc_idx (likewise for kvm_pmu_is_valid_msr_idx).
Suggested-by: Paolo Bonzini <[email protected]>
Signed-off-by: Like Xu <[email protected]>
---
arch/x86/kvm/pmu.c | 6 +++---
arch/x86/kvm/pmu.h | 8 ++++----
arch/x86/kvm/pmu_amd.c | 9 +++++----
arch/x86/kvm/vmx/pmu_intel.c | 10 +++++-----
arch/x86/kvm/x86.c | 2 +-
5 files changed, 18 insertions(+), 17 deletions(-)
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
index 46875bbd0419..de362ba0df01 100644
--- a/arch/x86/kvm/pmu.c
+++ b/arch/x86/kvm/pmu.c
@@ -271,9 +271,9 @@ void kvm_pmu_handle_event(struct kvm_vcpu *vcpu)
}
/* check if idx is a valid index to access PMU */
-int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx)
+int kvm_pmu_is_valid_rdpmc_idx(struct kvm_vcpu *vcpu, unsigned int idx)
{
- return kvm_x86_ops->pmu_ops->is_valid_msr_idx(vcpu, idx);
+ return kvm_x86_ops->pmu_ops->is_valid_rdpmc_idx(vcpu, idx);
}
bool is_vmware_backdoor_pmc(u32 pmc_idx)
@@ -323,7 +323,7 @@ int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned idx, u64 *data)
if (is_vmware_backdoor_pmc(idx))
return kvm_pmu_rdpmc_vmware(vcpu, idx, data);
- pmc = kvm_x86_ops->pmu_ops->msr_idx_to_pmc(vcpu, idx, &mask);
+ pmc = kvm_x86_ops->pmu_ops->rdpmc_idx_to_pmc(vcpu, idx, &mask);
if (!pmc)
return 1;
diff --git a/arch/x86/kvm/pmu.h b/arch/x86/kvm/pmu.h
index 58265f761c3b..c3faa70d9886 100644
--- a/arch/x86/kvm/pmu.h
+++ b/arch/x86/kvm/pmu.h
@@ -25,9 +25,9 @@ struct kvm_pmu_ops {
unsigned (*find_fixed_event)(int idx);
bool (*pmc_is_enabled)(struct kvm_pmc *pmc);
struct kvm_pmc *(*pmc_idx_to_pmc)(struct kvm_pmu *pmu, int pmc_idx);
- struct kvm_pmc *(*msr_idx_to_pmc)(struct kvm_vcpu *vcpu, unsigned idx,
- u64 *mask);
- int (*is_valid_msr_idx)(struct kvm_vcpu *vcpu, unsigned idx);
+ struct kvm_pmc *(*rdpmc_idx_to_pmc)(struct kvm_vcpu *vcpu,
+ unsigned int idx, u64 *mask);
+ int (*is_valid_rdpmc_idx)(struct kvm_vcpu *vcpu, unsigned int idx);
bool (*is_valid_msr)(struct kvm_vcpu *vcpu, u32 msr);
int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
int (*set_msr)(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
@@ -110,7 +110,7 @@ void reprogram_counter(struct kvm_pmu *pmu, int pmc_idx);
void kvm_pmu_deliver_pmi(struct kvm_vcpu *vcpu);
void kvm_pmu_handle_event(struct kvm_vcpu *vcpu);
int kvm_pmu_rdpmc(struct kvm_vcpu *vcpu, unsigned pmc, u64 *data);
-int kvm_pmu_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx);
+int kvm_pmu_is_valid_rdpmc_idx(struct kvm_vcpu *vcpu, unsigned int idx);
bool kvm_pmu_is_valid_msr(struct kvm_vcpu *vcpu, u32 msr);
int kvm_pmu_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
int kvm_pmu_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info);
diff --git a/arch/x86/kvm/pmu_amd.c b/arch/x86/kvm/pmu_amd.c
index c8388389a3b0..759b090f8140 100644
--- a/arch/x86/kvm/pmu_amd.c
+++ b/arch/x86/kvm/pmu_amd.c
@@ -174,7 +174,7 @@ static struct kvm_pmc *amd_pmc_idx_to_pmc(struct kvm_pmu *pmu, int pmc_idx)
}
/* returns 0 if idx's corresponding MSR exists; otherwise returns 1. */
-static int amd_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx)
+static int amd_is_valid_rdpmc_idx(struct kvm_vcpu *vcpu, unsigned int idx)
{
struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
@@ -184,7 +184,8 @@ static int amd_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx)
}
/* idx is the ECX register of RDPMC instruction */
-static struct kvm_pmc *amd_msr_idx_to_pmc(struct kvm_vcpu *vcpu, unsigned idx, u64 *mask)
+static struct kvm_pmc *amd_rdpmc_idx_to_pmc(struct kvm_vcpu *vcpu,
+ unsigned int idx, u64 *mask)
{
struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
struct kvm_pmc *counters;
@@ -306,8 +307,8 @@ struct kvm_pmu_ops amd_pmu_ops = {
.find_fixed_event = amd_find_fixed_event,
.pmc_is_enabled = amd_pmc_is_enabled,
.pmc_idx_to_pmc = amd_pmc_idx_to_pmc,
- .msr_idx_to_pmc = amd_msr_idx_to_pmc,
- .is_valid_msr_idx = amd_is_valid_msr_idx,
+ .rdpmc_idx_to_pmc = amd_rdpmc_idx_to_pmc,
+ .is_valid_rdpmc_idx = amd_is_valid_rdpmc_idx,
.is_valid_msr = amd_is_valid_msr,
.get_msr = amd_pmu_get_msr,
.set_msr = amd_pmu_set_msr,
diff --git a/arch/x86/kvm/vmx/pmu_intel.c b/arch/x86/kvm/vmx/pmu_intel.c
index 3e9c059099e9..8b999dae15f2 100644
--- a/arch/x86/kvm/vmx/pmu_intel.c
+++ b/arch/x86/kvm/vmx/pmu_intel.c
@@ -111,7 +111,7 @@ static struct kvm_pmc *intel_pmc_idx_to_pmc(struct kvm_pmu *pmu, int pmc_idx)
}
/* returns 0 if idx's corresponding MSR exists; otherwise returns 1. */
-static int intel_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx)
+static int intel_is_valid_rdpmc_idx(struct kvm_vcpu *vcpu, unsigned int idx)
{
struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
bool fixed = idx & (1u << 30);
@@ -122,8 +122,8 @@ static int intel_is_valid_msr_idx(struct kvm_vcpu *vcpu, unsigned idx)
(fixed && idx >= pmu->nr_arch_fixed_counters);
}
-static struct kvm_pmc *intel_msr_idx_to_pmc(struct kvm_vcpu *vcpu,
- unsigned idx, u64 *mask)
+static struct kvm_pmc *intel_rdpmc_idx_to_pmc(struct kvm_vcpu *vcpu,
+ unsigned int idx, u64 *mask)
{
struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
bool fixed = idx & (1u << 30);
@@ -366,8 +366,8 @@ struct kvm_pmu_ops intel_pmu_ops = {
.find_fixed_event = intel_find_fixed_event,
.pmc_is_enabled = intel_pmc_is_enabled,
.pmc_idx_to_pmc = intel_pmc_idx_to_pmc,
- .msr_idx_to_pmc = intel_msr_idx_to_pmc,
- .is_valid_msr_idx = intel_is_valid_msr_idx,
+ .rdpmc_idx_to_pmc = intel_rdpmc_idx_to_pmc,
+ .is_valid_rdpmc_idx = intel_is_valid_rdpmc_idx,
.is_valid_msr = intel_is_valid_msr,
.get_msr = intel_pmu_get_msr,
.set_msr = intel_pmu_set_msr,
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 661e2bf38526..72ce691fd45d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6111,7 +6111,7 @@ static void emulator_set_smbase(struct x86_emulate_ctxt *ctxt, u64 smbase)
static int emulator_check_pmc(struct x86_emulate_ctxt *ctxt,
u32 pmc)
{
- return kvm_pmu_is_valid_msr_idx(emul_to_vcpu(ctxt), pmc);
+ return kvm_pmu_is_valid_rdpmc_idx(emul_to_vcpu(ctxt), pmc);
}
static int emulator_read_pmc(struct x86_emulate_ctxt *ctxt,
--
2.21.0
On Tue, Oct 22, 2019 at 1:12 AM Like Xu <[email protected]> wrote:
>
> The leagcy pmu_ops->msr_idx_to_pmc is only called in kvm_pmu_rdpmc, so
> this name is restrictedly limited to rdpmc_idx which could be indexed
> exactly to a kvm_pmc. Let's restrict its semantic by renaming the
> existing msr_idx_to_pmc to rdpmc_idx_to_pmc, and is_valid_msr_idx to
> is_valid_rdpmc_idx (likewise for kvm_pmu_is_valid_msr_idx).
>
> Suggested-by: Paolo Bonzini <[email protected]>
> Signed-off-by: Like Xu <[email protected]>
Nit: The ECX argument to RDPMC is more than just an index (in fact,
intel_is_valid_msr_idx() extracts the index from the provided ECX
value), so I'd suggest s/rdpmc_idx/rdpmc_ecx/g.
Reviewed-by: Jim Mattson <[email protected]>