From: Jim Mattson <jmattson@google.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Thomas Gleixner <tglx@kernel.org>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Shuah Khan <shuah@kernel.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org,
Clayton Pence <ctpence@google.com>
Cc: Jim Mattson <jmattson@google.com>
Subject: [PATCH v2 3/3] KVM: selftests: Update hwcr_msr_test for CPUID faulting bit
Date: Fri, 8 May 2026 10:07:04 -0700 [thread overview]
Message-ID: <20260508170714.489136-4-jmattson@google.com> (raw)
In-Reply-To: <20260508170714.489136-1-jmattson@google.com>
Add BIT_ULL(35) (CpuidUserDis) to the valid mask in hwcr_msr_test, now that
KVM accepts writes to this bit when the guest CPUID advertises
CpuidUserDis.
Signed-off-by: Jim Mattson <jmattson@google.com>
---
tools/testing/selftests/kvm/x86/hwcr_msr_test.c | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/tools/testing/selftests/kvm/x86/hwcr_msr_test.c b/tools/testing/selftests/kvm/x86/hwcr_msr_test.c
index 8e20a03b3329..5357281e6e4e 100644
--- a/tools/testing/selftests/kvm/x86/hwcr_msr_test.c
+++ b/tools/testing/selftests/kvm/x86/hwcr_msr_test.c
@@ -10,11 +10,11 @@
void test_hwcr_bit(struct kvm_vcpu *vcpu, unsigned int bit)
{
- const u64 ignored = BIT_ULL(3) | BIT_ULL(6) | BIT_ULL(8);
- const u64 valid = BIT_ULL(18) | BIT_ULL(24);
- const u64 legal = ignored | valid;
- u64 val = BIT_ULL(bit);
- u64 actual;
+ const uint64_t ignored = BIT_ULL(3) | BIT_ULL(6) | BIT_ULL(8);
+ const uint64_t valid = BIT_ULL(18) | BIT_ULL(24) | BIT_ULL(35);
+ const uint64_t legal = ignored | valid;
+ uint64_t val = BIT_ULL(bit);
+ uint64_t actual;
int r;
r = _vcpu_set_msr(vcpu, MSR_K7_HWCR, val);
--
2.54.0.563.g4f69b47b94-goog
prev parent reply other threads:[~2026-05-08 17:07 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-08 17:07 [PATCH v2 0/3] KVM: x86: Virtualize AMD CPUID faulting Jim Mattson
2026-05-08 17:07 ` [PATCH v2 1/3] KVM: x86: Remove supports_cpuid_fault() helper Jim Mattson
2026-05-08 17:07 ` [PATCH v2 2/3] KVM: x86: Virtualize AMD CPUID faulting Jim Mattson
2026-05-12 21:33 ` Sean Christopherson
2026-05-13 0:01 ` Jim Mattson
2026-05-13 0:04 ` Sean Christopherson
2026-05-08 17:07 ` Jim Mattson [this message]
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