From: Tycho Andersen <tycho@kernel.org>
To: David Woodhouse <dwmw2@infradead.org>
Cc: "Sean Christopherson" <seanjc@google.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
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"Thomas Gleixner" <tglx@kernel.org>,
"Ingo Molnar" <mingo@redhat.com>,
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"Dave Hansen" <dave.hansen@linux.intel.com>,
"H . Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, "Jason Gunthorpe" <jgg@ziepe.ca>,
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"David Woodhouse" <dwmw@amazon.co.uk>
Subject: Re: [RFC PATCH 02/11] KVM: selftests: sev_init2_tests: Derive SEV availability from KVM
Date: Fri, 17 Jul 2026 08:49:48 -0600 [thread overview]
Message-ID: <alpBAQiqVObDf2R_@tycho.pizza> (raw)
In-Reply-To: <4710ad35dcfd1a85a24d15fb56dbf233ac05ad49.1784194290.git.dwmw@amazon.co.uk>
On Thu, Jul 16, 2026 at 10:31:22AM +0100, David Woodhouse wrote:
> From: David Woodhouse <dwmw@amazon.co.uk>
>
> The test asserted that the X86_FEATURE_SEV CPUID bit exactly matches
> whether KVM offers KVM_X86_SEV_VM. That is not an invariant: when all
> SEV ASIDs are assigned to SEV-SNP, KVM does not offer the SEV VM type
> even though CPUID reports SEV, so the test aborts on an SNP-only host.
>
> Derive SEV availability from KVM_CAP_VM_TYPES (as already done for SEV-ES
> and SNP), assert only the one-way implication that a type offered by KVM
> is also reported in CPUID, and TEST_REQUIRE() the SEV VM type so the test
> skips cleanly when it is unavailable.
>
> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Tycho Andersen (AMD) <tycho@kernel.org>
next prev parent reply other threads:[~2026-07-17 14:49 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-16 9:31 [RFC PATCH 00/11] KVM: Allow alternative providers of guest_memfd backed by PFNMAP memory David Woodhouse
2026-07-16 9:31 ` [RFC PATCH 01/11] KVM: selftests: sev_smoke_test: Only run VM types the host offers David Woodhouse
2026-07-16 9:31 ` [RFC PATCH 02/11] KVM: selftests: sev_init2_tests: Derive SEV availability from KVM David Woodhouse
2026-07-17 14:49 ` Tycho Andersen [this message]
2026-07-16 9:31 ` [RFC PATCH 03/11] KVM: SEV: Remove struct page dependency from SNP gmem paths David Woodhouse
2026-07-16 15:30 ` sashiko-bot
2026-07-16 9:31 ` [RFC PATCH 04/11] KVM: guest_memfd: Introduce guest memory ops and route native gmem through them David Woodhouse
2026-07-16 15:30 ` sashiko-bot
2026-07-16 9:31 ` [RFC PATCH 05/11] iommufd: Look up private-interconnect phys via exporter symbols David Woodhouse
2026-07-16 15:33 ` sashiko-bot
2026-07-16 9:31 ` [RFC PATCH 06/11] iommufd: Plumb dma-buf memory-type (RAM vs MMIO) through the phys map David Woodhouse
2026-07-16 15:41 ` sashiko-bot
2026-07-16 9:31 ` [RFC PATCH 07/11] KVM: guest_memfd: Add ops-driven page revocation David Woodhouse
2026-07-16 15:42 ` sashiko-bot
2026-07-16 9:31 ` [RFC PATCH 08/11] samples/kvm: Add guest_memfd backing sample David Woodhouse
2026-07-16 15:53 ` sashiko-bot
2026-07-16 9:31 ` [RFC PATCH 09/11] selftests/kvm: gmem_provider KVM-only tests David Woodhouse
2026-07-16 15:46 ` sashiko-bot
2026-07-16 9:31 ` [RFC PATCH 10/11] selftests/kvm: gmem_provider iommufd tests David Woodhouse
2026-07-16 15:48 ` sashiko-bot
2026-07-16 9:31 ` [RFC PATCH 11/11] samples/kvm, selftests/kvm: Allow the gmem_provider NVMe DMA test on arm64 David Woodhouse
2026-07-16 15:54 ` sashiko-bot
2026-07-16 15:31 ` [RFC PATCH 01/11] KVM: selftests: sev_smoke_test: Only run VM types the host offers sashiko-bot
2026-07-17 14:49 ` Tycho Andersen
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