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Tue, 06 May 2025 06:07:14 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:72:2835:d413:5ee2:7e6a]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-22e15229384sm72628275ad.206.2025.05.06.06.07.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 May 2025 06:07:14 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, Neeraj.Upadhyay@amd.com, kvijayab@amd.com, yuehaibing@huawei.com, peterz@infradead.org, jpoimboe@kernel.org, jacob.jun.pan@linux.intel.com, tiala@microsoft.com Cc: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 0/6] x86/Hyper-V: Add AMD Secure AVIC for Hyper-V platform Date: Tue, 6 May 2025 09:07:05 -0400 Message-Id: <20250506130712.156583-1-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Tianyu Lan Secure AVIC is a new hardware feature in the AMD64 architecture to allow SEV-SNP guests to prevent the hypervisor from generating unexpected interrupts to a vCPU or otherwise violate architectural assumptions around APIC behavior. Each vCPU has a guest-allocated APIC backing page of size 4K, which maintains APIC state for that vCPU. APIC backing page's ALLOWED_IRR field indicates the interrupt vectors which the guest allows the hypervisor to send. This patchset is to enable the feature for Hyper-V platform. Patch "Expose x2apic_savic_update_vector()" is to expose new fucntion and device driver and arch code may update AVIC backing page ALLOWED_IRR field to allow Hyper-V inject associated vector. This patchset is based on the AMD patchset "AMD: Add Secure AVIC Guest Support" https://lkml.org/lkml/2025/4/17/585 Tianyu Lan (6): x86/Hyper-V: Not use hv apic driver when Secure AVIC is available x86/x2apic-savic: Expose x2apic_savic_update_vector() drivers/hv: Allow vmbus message synic interrupt injected from Hyper-V x86/Hyper-V: Allow Hyper-V to inject Hyper-V vectors x86/Hyper-V: Not use auto-eoi when Secure AVIC is available x86/x2apic-savic: Not set APIC backing page if Secure AVIC is not enabled. arch/x86/hyperv/hv_apic.c | 3 +++ arch/x86/hyperv/hv_init.c | 12 ++++++++++++ arch/x86/include/asm/apic.h | 9 +++++++++ arch/x86/kernel/apic/x2apic_savic.c | 13 ++++++++++++- arch/x86/kernel/cpu/mshyperv.c | 3 +++ drivers/hv/hv.c | 2 ++ 6 files changed, 41 insertions(+), 1 deletion(-) -- 2.25.1