From: "Naveen N Rao (AMD)" <naveen@kernel.org>
To: Sean Christopherson <seanjc@google.com>, Borislav Petkov <bp@alien8.de>
Cc: <kvm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Nikunj A Dadhania <nikunj@amd.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
Neeraj Upadhyay <neeraj.upadhyay@amd.com>,
Tianyu Lan <tiala@microsoft.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
Thomas Gleixner <tglx@kernel.org>
Subject: [RFC PATCH v3 05/27] x86/cpufeatures: Add Secure AVIC CPU feature
Date: Wed, 8 Jul 2026 12:02:03 +0530 [thread overview]
Message-ID: <0aa478fcd5cdf5f6835b1ff943d9655fdc8822a9.1783490022.git.naveen@kernel.org> (raw)
In-Reply-To: <cover.1783490022.git.naveen@kernel.org>
From: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Add CPU feature detection for Secure AVIC. The Secure AVIC feature
provides hardware acceleration for performance sensitive APIC accesses
and support for managing guest-owned APIC state for the SEV-SNP guests.
Co-developed-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
---
arch/x86/include/asm/cpufeatures.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index 35a2a0f9ab32..d538db618f24 100644
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -457,6 +457,7 @@
#define X86_FEATURE_DEBUG_SWAP (19*32+14) /* "debug_swap" SEV-ES full debug state swap support */
#define X86_FEATURE_RMPREAD (19*32+21) /* RMPREAD instruction */
#define X86_FEATURE_SEGMENTED_RMP (19*32+23) /* Segmented RMP support */
+#define X86_FEATURE_SNP_SECURE_AVIC (19*32+26) /* SEV-SNP Secure AVIC */
#define X86_FEATURE_ALLOWED_SEV_FEATURES (19*32+27) /* Allowed SEV Features */
#define X86_FEATURE_SVSM (19*32+28) /* "svsm" SVSM present */
#define X86_FEATURE_HV_INUSE_WR_ALLOWED (19*32+30) /* Allow Write to in-use hypervisor-owned pages */
--
2.54.0
next prev parent reply other threads:[~2026-07-08 6:35 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-08 6:31 [RFC PATCH v3 00/27] KVM: SVM: Add support for SEV-SNP Secure AVIC Naveen N Rao (AMD)
2026-07-08 6:31 ` [RFC PATCH v3 01/27] x86/apic: Propagate APIC_SPIV writes to hv for " Naveen N Rao (AMD)
2026-07-10 2:03 ` Borislav Petkov
2026-07-10 15:02 ` Naveen N Rao
2026-07-11 4:37 ` Borislav Petkov
2026-07-13 17:38 ` Tom Lendacky
2026-07-14 8:57 ` Naveen N Rao
2026-07-08 6:32 ` [RFC PATCH v3 02/27] x86/apic: Drop savic_eoi() in favor of native_apic_msr_eoi() " Naveen N Rao (AMD)
2026-07-13 17:43 ` Tom Lendacky
2026-07-14 9:02 ` Naveen N Rao
2026-10-06 6:16 ` Sean Christopherson
2026-10-06 3:20 ` Borislav Petkov
2026-07-08 6:32 ` [RFC PATCH v3 03/27] x86/kvm: Disable PV_SEND_IPI if Secure AVIC is enabled Naveen N Rao (AMD)
2026-07-13 17:52 ` Tom Lendacky
2026-07-14 9:42 ` Naveen N Rao
2026-07-08 6:32 ` [RFC PATCH v3 04/27] x86/apic: Use AVIC_INCOMPLETE_IPI VMGEXIT for Secure AVIC IPI handling Naveen N Rao (AMD)
2026-07-13 17:59 ` Tom Lendacky
2026-07-14 10:03 ` Naveen N Rao
2026-07-08 6:32 ` Naveen N Rao (AMD) [this message]
2026-07-13 18:32 ` [RFC PATCH v3 05/27] x86/cpufeatures: Add Secure AVIC CPU feature Tom Lendacky
2026-07-08 6:32 ` [RFC PATCH v3 06/27] KVM: SVM: Add helper to check if Secure AVIC is enabled for a guest Naveen N Rao (AMD)
2026-07-13 18:35 ` Tom Lendacky
2026-07-08 6:32 ` [RFC PATCH v3 07/27] KVM: SVM: Set guest_apic_protected if Secure AVIC is enabled Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 08/27] kvm: irqfd: Have kvm_arch_has_irq_bypass() take struct kvm pointer Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 09/27] KVM: SVM: Disable IRQ bypass for Secure AVIC Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 10/27] KVM: SVM: Add avic_ipiv_is_soft_disabled() as a wrapper around enable_ipiv Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 11/27] KVM: SVM: Disable IPIv for Secure AVIC Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 12/27] KVM: SVM: Short-circuit a few AVIC flows " Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 13/27] KVM: SVM: Warn if we ever receive AVIC_UNACCELERATED_ACCESS #VMEXIT Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 14/27] KVM: SVM: Do not inhibit AVIC for SEV-SNP guests if Secure AVIC is enabled Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 15/27] KVM: SVM: Set VGIF in VMSA area for Secure AVIC guests Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 16/27] KVM: SVM: Add handler for VMGEXIT Secure AVIC NAE event Naveen N Rao (AMD)
2026-08-26 16:09 ` Sean Christopherson
2026-09-22 15:01 ` Naveen N Rao
2026-09-30 14:43 ` Naveen N Rao
2026-09-30 15:45 ` Sean Christopherson
2026-09-30 19:54 ` Naveen N Rao
2026-07-08 6:32 ` [RFC PATCH v3 17/27] KVM: SVM: Do not intercept SECURE_AVIC_CONTROL MSR for Secure AVIC guests Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 18/27] KVM: x86: Add a new kvm_x86_op protected_apic_has_injectable_intr() Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 19/27] KVM: SVM: Implement kvm_x86_ops->protected_apic_has_injectable_intr() for Secure AVIC Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 20/27] KVM: SVM: Implement kvm_x86_ops->protected_apic_has_interrupt() " Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 21/27] KVM: SVM: Add interrupt delivery support for Secure AVIC guests Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 22/27] KVM: SVM: Add support for incomplete IPI handling for Secure AVIC Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 23/27] KVM: SVM: Add support for injecting NMIs for Secure AVIC guests Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 24/27] KVM: SVM: Mandate use of split irqchip for Secure AVIC Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 25/27] KVM: SVM: Do not inject exceptions " Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 26/27] KVM: SVM: Do not intercept exceptions for Secure AVIC guests Naveen N Rao (AMD)
2026-07-08 6:32 ` [RFC PATCH v3 27/27] KVM: SVM: Advertise Secure AVIC support for SEV-SNP guests Naveen N Rao (AMD)
2026-07-08 9:20 ` [RFC PATCH v3 00/27] KVM: SVM: Add support for SEV-SNP Secure AVIC Naveen N Rao
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