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| author | Louis Burda <quent.burda@gmail.com> | 2023-02-07 08:25:55 -0600 |
|---|---|---|
| committer | Louis Burda <quent.burda@gmail.com> | 2023-02-07 08:25:55 -0600 |
| commit | 1caab14ce3bf1ed6ea1074e5ced4b3e5bd4e4b89 (patch) | |
| tree | 62abdfc4fd1e73ca146f963d531e54a3824eb49d | |
| parent | aa27d3b55fb46c7eb44e8a61aaaaae2aa6eed63c (diff) | |
| download | cachepc-linux-1caab14ce3bf1ed6ea1074e5ced4b3e5bd4e4b89.tar.gz cachepc-linux-1caab14ce3bf1ed6ea1074e5ced4b3e5bd4e4b89.zip | |
Add counter for L1 misses in guest
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 4 | ||||
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 12 |
2 files changed, 13 insertions, 3 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index ba212342528e..d8400ed8aa72 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -3957,8 +3957,8 @@ static bool page_fault_handle_page_track(struct kvm_vcpu *vcpu, case CPC_TRACK_FAULT_NO_RUN: BUG_ON(modes[i] != KVM_PAGE_TRACK_ACCESS); - cpc_send_track_step_event_single( - fault->gfn, fault->error_code, cpc_retinst); + cpc_send_track_step_event_single(fault->gfn, fault->error_code, + cpc_retinst, cpc_guest_misses); return true; case CPC_TRACK_STEPS: diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 3534fcc6a45a..865fcd534407 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -2178,7 +2178,7 @@ static int intr_interception(struct kvm_vcpu *vcpu) break; } - cpc_send_track_step_event(&cpc_faults); + cpc_send_track_step_event(&cpc_faults, cpc_guest_misses); list_for_each_entry_safe(fault, next, &cpc_faults, list) { if (cpc_track_steps.with_data && cpc_track_steps.stepping) cpc_track_single(vcpu, fault->gfn, KVM_PAGE_TRACK_ACCESS); @@ -3974,6 +3974,7 @@ static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu) cpc_retinst = cpc_read_pmc(CPC_RETINST_PMC); cpc_retinst_user = cpc_read_pmc(CPC_RETINST_USER_PMC); + cpc_guest_misses = cpc_read_pmc(CPC_L1MISS_GUEST_PMC); if (sev_es_guest(vcpu->kvm)) { __svm_sev_es_vcpu_run(vmcb_pa); @@ -3995,6 +3996,15 @@ static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu) cpc_retinst = cpc_read_pmc(CPC_RETINST_PMC) - cpc_retinst; cpc_retinst_user = cpc_read_pmc(CPC_RETINST_USER_PMC) - cpc_retinst_user; + cpc_guest_misses = cpc_read_pmc(CPC_L1MISS_GUEST_PMC) - cpc_guest_misses; + + if (cpc_baseline_measure && cpc_guest_misses < cpc_baseline_guest_misses) + cpc_baseline_guest_misses = cpc_guest_misses; + + if (cpc_baseline_active) { + WARN_ON_ONCE(cpc_guest_misses < cpc_baseline_guest_misses); + cpc_guest_misses -= cpc_baseline_guest_misses; + } if (cpc_prime_probe) cpc_save_msrmts(cpc_ds); |