From: Will Deacon <will@kernel.org>
To: kvmarm@lists.linux.dev
Cc: linux-arm-kernel@lists.infradead.org,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Oliver Upton <oupton@kernel.org>, Joey Gouly <joey.gouly@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Quentin Perret <qperret@google.com>,
Fuad Tabba <tabba@google.com>,
Vincent Donnefort <vdonnefort@google.com>,
Mostafa Saleh <smostafa@google.com>
Subject: [PATCH 04/30] KVM: arm64: Don't advertise unsupported features for protected guests
Date: Mon, 5 Jan 2026 15:49:12 +0000 [thread overview]
Message-ID: <20260105154939.11041-5-will@kernel.org> (raw)
In-Reply-To: <20260105154939.11041-1-will@kernel.org>
Both SVE and PMUv3 are treated as "restricted" features for protected
guests and attempts to access their corresponding architectural state
from a protected guest result in an undefined exception being injected
by the hypervisor.
Since these exceptions are unexpected and typically fatal for the guest,
don't advertise these features for protected guests.
Signed-off-by: Will Deacon <will@kernel.org>
---
arch/arm64/include/asm/kvm_pkvm.h | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_pkvm.h b/arch/arm64/include/asm/kvm_pkvm.h
index 0aecd4ac5f45..5a71d25febca 100644
--- a/arch/arm64/include/asm/kvm_pkvm.h
+++ b/arch/arm64/include/asm/kvm_pkvm.h
@@ -37,8 +37,6 @@ static inline bool kvm_pvm_ext_allowed(long ext)
case KVM_CAP_MAX_VCPU_ID:
case KVM_CAP_MSI_DEVID:
case KVM_CAP_ARM_VM_IPA_SIZE:
- case KVM_CAP_ARM_PMU_V3:
- case KVM_CAP_ARM_SVE:
case KVM_CAP_ARM_PTRAUTH_ADDRESS:
case KVM_CAP_ARM_PTRAUTH_GENERIC:
return true;
--
2.52.0.351.gbe84eed79e-goog
next prev parent reply other threads:[~2026-01-05 15:50 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-05 15:49 [PATCH 00/30] KVM: arm64: Add support for protected guest memory with pKVM Will Deacon
2026-01-05 15:49 ` [PATCH 01/30] KVM: arm64: Invert KVM_PGTABLE_WALK_HANDLE_FAULT to fix pKVM walkers Will Deacon
2026-01-06 14:33 ` Quentin Perret
2026-01-05 15:49 ` [PATCH 02/30] KVM: arm64: Remove redundant 'pgt' pointer checks from MMU notifiers Will Deacon
2026-01-06 14:32 ` Quentin Perret
2026-01-09 14:31 ` Will Deacon
2026-01-09 17:31 ` Will Deacon
2026-01-05 15:49 ` [PATCH 03/30] KVM: arm64: Rename __pkvm_pgtable_stage2_unmap() Will Deacon
2026-01-05 15:49 ` Will Deacon [this message]
2026-01-05 15:49 ` [PATCH 05/30] KVM: arm64: Expose self-hosted debug regs as RAZ/WI for protected guests Will Deacon
2026-01-05 15:49 ` [PATCH 06/30] KVM: arm64: Remove pointless is_protected_kvm_enabled() checks from hyp Will Deacon
2026-01-06 14:40 ` Quentin Perret
2026-01-09 14:23 ` Will Deacon
2026-01-05 15:49 ` [PATCH 07/30] KVM: arm64: Ignore MMU notifier callbacks for protected VMs Will Deacon
2026-01-05 15:49 ` [PATCH 08/30] KVM: arm64: Prevent unsupported memslot operations on " Will Deacon
2026-01-05 15:49 ` [PATCH 09/30] KVM: arm64: Split teardown hypercall into two phases Will Deacon
2026-01-05 15:49 ` [PATCH 10/30] KVM: arm64: Introduce __pkvm_host_donate_guest() Will Deacon
2026-01-06 14:48 ` Quentin Perret
2026-01-09 14:30 ` Will Deacon
2026-01-09 15:10 ` Quentin Perret
2026-01-05 15:49 ` [PATCH 11/30] KVM: arm64: Hook up donation hypercall to pkvm_pgtable_stage2_map() Will Deacon
2026-01-05 15:49 ` [PATCH 12/30] KVM: arm64: Handle aborts from protected VMs Will Deacon
2026-01-05 15:49 ` [PATCH 13/30] KVM: arm64: Introduce __pkvm_reclaim_dying_guest_page() Will Deacon
2026-01-06 16:26 ` Vincent Donnefort
2026-01-05 15:49 ` [PATCH 14/30] KVM: arm64: Hook up reclaim hypercall to pkvm_pgtable_stage2_destroy() Will Deacon
2026-01-06 14:59 ` Quentin Perret
2026-01-09 14:35 ` Will Deacon
2026-01-09 14:57 ` Quentin Perret
2026-01-05 15:49 ` [PATCH 15/30] KVM: arm64: Refactor enter_exception64() Will Deacon
2026-01-05 15:49 ` [PATCH 16/30] KVM: arm64: Inject SIGSEGV on illegal accesses Will Deacon
2026-01-05 15:49 ` [PATCH 17/30] KVM: arm64: Generalise kvm_pgtable_stage2_set_owner() Will Deacon
2026-01-06 15:20 ` Quentin Perret
2026-01-09 18:46 ` Will Deacon
2026-01-05 15:49 ` [PATCH 18/30] KVM: arm64: Introduce host_stage2_set_owner_metadata_locked() Will Deacon
2026-01-05 15:49 ` [PATCH 19/30] KVM: arm64: Annotate guest donations with handle and gfn in host stage-2 Will Deacon
2026-01-06 16:01 ` Fuad Tabba
2026-01-09 14:42 ` Will Deacon
2026-01-05 15:49 ` [PATCH 20/30] KVM: arm64: Introduce hypercall to force reclaim of a protected page Will Deacon
2026-01-06 15:44 ` Quentin Perret
2026-01-09 17:47 ` Will Deacon
2026-01-05 15:49 ` [PATCH 21/30] KVM: arm64: Reclaim faulting page from pKVM in spurious fault handler Will Deacon
2026-01-05 15:49 ` [PATCH 22/30] KVM: arm64: Return -EFAULT from VCPU_RUN on access to a poisoned pte Will Deacon
2026-01-06 15:54 ` Quentin Perret
2026-01-09 14:57 ` Will Deacon
2026-01-09 15:29 ` Quentin Perret
2026-01-09 17:35 ` Will Deacon
2026-01-05 15:49 ` [PATCH 23/30] KVM: arm64: Add hvc handler at EL2 for hypercalls from protected VMs Will Deacon
2026-01-06 15:52 ` Vincent Donnefort
2026-01-05 15:49 ` [PATCH 24/30] KVM: arm64: Implement the MEM_SHARE hypercall for " Will Deacon
2026-01-06 15:45 ` Vincent Donnefort
2026-01-09 15:01 ` Will Deacon
2026-01-05 15:49 ` [PATCH 25/30] KVM: arm64: Implement the MEM_UNSHARE " Will Deacon
2026-01-06 15:50 ` Vincent Donnefort
2026-01-05 15:49 ` [PATCH 26/30] KVM: arm64: Allow userspace to create protected VMs when pKVM is enabled Will Deacon
2026-01-05 15:49 ` [PATCH 27/30] KVM: arm64: Add some initial documentation for pKVM Will Deacon
2026-01-06 15:59 ` Vincent Donnefort
2026-01-09 15:04 ` Will Deacon
2026-01-05 15:49 ` [PATCH 28/30] KVM: arm64: Extend pKVM page ownership selftests to cover guest donation Will Deacon
2026-01-05 15:49 ` [PATCH 29/30] KVM: arm64: Register 'selftest_vm' in the VM table Will Deacon
2026-01-05 15:49 ` [PATCH 30/30] KVM: arm64: Extend pKVM page ownership selftests to cover forced reclaim Will Deacon
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