From: "Chang S. Bae" <chang.seok.bae@intel.com>
To: pbonzini@redhat.com, seanjc@google.com
Cc: kvm@vger.kernel.org, x86@kernel.org,
linux-kernel@vger.kernel.org, chang.seok.bae@intel.com
Subject: [PATCH v7 16/20] KVM: x86: Add APX to supported XCR0
Date: Wed, 2 Sep 2026 02:18:00 +0000 [thread overview]
Message-ID: <20260902021804.718676-17-chang.seok.bae@intel.com> (raw)
In-Reply-To: <20260902021804.718676-1-chang.seok.bae@intel.com>
Set kvm_caps.supported_xcr0[APX] when the host has enabled the APX state
along with CONFIG_KVM_APX=y.
Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com>
---
arch/x86/kvm/x86.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 76f70d2631f6..8c6365122efb 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7132,6 +7132,8 @@ int kvm_x86_vendor_init(struct kvm_x86_init_ops *ops)
if (boot_cpu_has(X86_FEATURE_XSAVE)) {
kvm_host.xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK);
kvm_caps.supported_xcr0 = kvm_host.xcr0 & KVM_SUPPORTED_XCR0;
+ if (IS_ENABLED(CONFIG_KVM_APX))
+ kvm_caps.supported_xcr0 |= kvm_host.xcr0 & XFEATURE_MASK_APX;
}
if (boot_cpu_has(X86_FEATURE_XSAVES)) {
--
2.53.0
next prev parent reply other threads:[~2026-09-02 2:45 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-02 2:17 [PATCH v7 00/20] KVM: x86: Enable APX for guests Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 01/20] KVM: x86: Extend VCPU registers for EGPRs Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 02/20] KVM: VMX: Save guest EGPRs in VCPU cache Chang S. Bae
2026-09-02 3:26 ` sashiko-bot
2026-09-02 2:17 ` [PATCH v7 03/20] KVM: x86: Support APX state for XSAVE ABI Chang S. Bae
2026-09-02 3:08 ` sashiko-bot
2026-09-02 2:17 ` [PATCH v7 04/20] KVM: VMX: Refactor VMX instruction information access Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 05/20] KVM: VMX: Refactor instruction information decoding Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 06/20] KVM: VMX: Remove unused control-register access defines Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 07/20] KVM: VMX: Refactor register index retrieval from exit qualification Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 08/20] KVM: VMX: Support instruction information extension Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 09/20] KVM: nVMX: Propagate extended instruction information Chang S. Bae
2026-09-02 3:07 ` sashiko-bot
2026-09-02 2:17 ` [PATCH v7 10/20] KVM: x86: Support EGPR accessing and tracking for emulator Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 11/20] KVM: x86: Handle EGPR index and REX2-incompatible opcodes Chang S. Bae
2026-09-02 3:06 ` sashiko-bot
2026-09-02 2:17 ` [PATCH v7 12/20] KVM: x86: Support REX2-prefixed opcode decode Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 13/20] KVM: x86: Reject EVEX-prefixed instructions Chang S. Bae
2026-09-02 2:59 ` sashiko-bot
2026-09-02 2:17 ` [PATCH v7 14/20] KVM: x86: Move KVM_SUPPORTED_{XCR0,XSS} into kvm_x86_vendor_init() Chang S. Bae
2026-09-02 2:17 ` [PATCH v7 15/20] KVM: x86: Guard valid XCR0.APX settings Chang S. Bae
2026-09-02 2:18 ` Chang S. Bae [this message]
2026-09-02 3:07 ` [PATCH v7 16/20] KVM: x86: Add APX to supported XCR0 sashiko-bot
2026-09-02 2:18 ` [PATCH v7 17/20] KVM: x86: Expose APX foundation feature to userspace Chang S. Bae
2026-09-02 2:18 ` [PATCH v7 18/20] KVM: x86: Expose APX sub-features " Chang S. Bae
2026-09-02 3:00 ` sashiko-bot
2026-09-02 2:18 ` [PATCH v7 19/20] KVM: x86: selftests: Add APX state and ABI test Chang S. Bae
2026-09-02 3:07 ` sashiko-bot
2026-09-02 2:18 ` [PATCH v7 20/20] KVM: x86: selftests: Add APX state handling and XCR0 sanity checks Chang S. Bae
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