From: Sean Christopherson <seanjc@google.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
Kan Liang <kan.liang@linux.intel.com>,
Dapeng Mi <dapeng1.mi@linux.intel.com>,
Jim Mattson <jmattson@google.com>,
Jinrong Liang <cloudliang@tencent.com>,
Aaron Lewis <aaronlewis@google.com>, Like Xu <likexu@tencent.com>
Subject: [PATCH v9 06/28] KVM: x86/pmu: Don't ignore bits 31:30 for RDPMC index on AMD
Date: Fri, 1 Dec 2023 16:03:55 -0800 [thread overview]
Message-ID: <20231202000417.922113-7-seanjc@google.com> (raw)
In-Reply-To: <20231202000417.922113-1-seanjc@google.com>
Stop stripping bits 31:30 prior to validating/consuming the RDPMC index on
AMD. Per the APM's documentation of RDPMC, *values* greater than 27 are
reserved. The behavior of upper bits being flags is firmly Intel-only.
Fixes: ca724305a2b0 ("KVM: x86/vPMU: Implement AMD vPMU code for KVM")
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/svm/pmu.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/x86/kvm/svm/pmu.c b/arch/x86/kvm/svm/pmu.c
index 1475d47c821c..1fafc46f61c9 100644
--- a/arch/x86/kvm/svm/pmu.c
+++ b/arch/x86/kvm/svm/pmu.c
@@ -77,8 +77,6 @@ static bool amd_is_valid_rdpmc_ecx(struct kvm_vcpu *vcpu, unsigned int idx)
{
struct kvm_pmu *pmu = vcpu_to_pmu(vcpu);
- idx &= ~(3u << 30);
-
return idx < pmu->nr_arch_gp_counters;
}
@@ -86,7 +84,7 @@ static bool amd_is_valid_rdpmc_ecx(struct kvm_vcpu *vcpu, unsigned int idx)
static struct kvm_pmc *amd_rdpmc_ecx_to_pmc(struct kvm_vcpu *vcpu,
unsigned int idx, u64 *mask)
{
- return amd_pmc_idx_to_pmc(vcpu_to_pmu(vcpu), idx & ~(3u << 30));
+ return amd_pmc_idx_to_pmc(vcpu_to_pmu(vcpu), idx);
}
static struct kvm_pmc *amd_msr_idx_to_pmc(struct kvm_vcpu *vcpu, u32 msr)
--
2.43.0.rc2.451.g8631bc7472-goog
next prev parent reply other threads:[~2023-12-02 0:04 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-02 0:03 [PATCH v9 00/28] KVM: x86/pmu: selftests: Fixes and new tests Sean Christopherson
2023-12-02 0:03 ` [PATCH v9 01/28] KVM: x86/pmu: Always treat Fixed counters as available when supported Sean Christopherson
2023-12-02 0:03 ` [PATCH v9 02/28] KVM: x86/pmu: Allow programming events that match unsupported arch events Sean Christopherson
2023-12-02 0:03 ` [PATCH v9 03/28] KVM: x86/pmu: Remove KVM's enumeration of Intel's architectural encodings Sean Christopherson
2023-12-02 0:03 ` [PATCH v9 04/28] KVM: x86/pmu: Setup fixed counters' eventsel during PMU initialization Sean Christopherson
2023-12-02 0:03 ` [PATCH v9 05/28] KVM: x86/pmu: Get eventsel for fixed counters from perf Sean Christopherson
2023-12-02 0:03 ` Sean Christopherson [this message]
2023-12-02 0:03 ` [PATCH v9 07/28] KVM: x86/pmu: Prioritize VMX interception over #GP on RDPMC due to bad index Sean Christopherson
2023-12-02 0:03 ` [PATCH v9 08/28] KVM: x86/pmu: Apply "fast" RDPMC only to Intel PMUs Sean Christopherson
2023-12-02 0:03 ` [PATCH v9 09/28] KVM: x86/pmu: Disallow "fast" RDPMC for architectural " Sean Christopherson
2023-12-11 6:03 ` Mi, Dapeng
2023-12-02 0:03 ` [PATCH v9 10/28] KVM: x86/pmu: Explicitly check for RDPMC of unsupported Intel PMC types Sean Christopherson
2023-12-11 6:26 ` Mi, Dapeng
2023-12-11 21:33 ` Jim Mattson
2023-12-11 23:43 ` Sean Christopherson
2023-12-12 2:26 ` Jim Mattson
2023-12-13 2:25 ` Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 11/28] KVM: selftests: Add vcpu_set_cpuid_property() to set properties Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 12/28] KVM: selftests: Drop the "name" param from KVM_X86_PMU_FEATURE() Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 13/28] KVM: selftests: Extend {kvm,this}_pmu_has() to support fixed counters Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 14/28] KVM: selftests: Add pmu.h and lib/pmu.c for common PMU assets Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 15/28] KVM: selftests: Test Intel PMU architectural events on gp counters Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 16/28] KVM: selftests: Test Intel PMU architectural events on fixed counters Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 17/28] KVM: selftests: Test consistency of CPUID with num of gp counters Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 18/28] KVM: selftests: Test consistency of CPUID with num of fixed counters Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 19/28] KVM: selftests: Add functional test for Intel's fixed PMU counters Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 20/28] KVM: selftests: Expand PMU counters test to verify LLC events Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 21/28] KVM: selftests: Add a helper to query if the PMU module param is enabled Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 22/28] KVM: selftests: Add helpers to read integer module params Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 23/28] KVM: selftests: Query module param to detect FEP in MSR filtering test Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 24/28] KVM: selftests: Move KVM_FEP macro into common library header Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 25/28] KVM: selftests: Test PMC virtualization with forced emulation Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 26/28] KVM: selftests: Add a forced emulation variation of KVM_ASM_SAFE() Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 27/28] KVM: selftests: Add helpers for safe and safe+forced RDMSR, RDPMC, and XGETBV Sean Christopherson
2023-12-02 0:04 ` [PATCH v9 28/28] KVM: selftests: Extend PMU counters test to validate RDPMC after WRMSR Sean Christopherson
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