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Tue, 06 May 2025 06:07:15 -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, yuehaibing@huawei.com, kvijayab@amd.com, jacob.jun.pan@linux.intel.com, jpoimboe@kernel.org, tiala@microsoft.com Cc: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 1/6] x86/Hyper-V: Not use hv apic driver when Secure AVIC is available Date: Tue, 6 May 2025 09:07:06 -0400 Message-Id: <20250506130712.156583-2-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250506130712.156583-1-ltykernel@gmail.com> References: <20250506130712.156583-1-ltykernel@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Tianyu Lan When Secure AVIC is available, AMD x2apic Secure AVIC driver should be selected and return directly in the hv_apic_init(). Signed-off-by: Tianyu Lan --- arch/x86/hyperv/hv_apic.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c index 6d91ac5f9836..bd8f83923305 100644 --- a/arch/x86/hyperv/hv_apic.c +++ b/arch/x86/hyperv/hv_apic.c @@ -292,6 +292,9 @@ static void hv_send_ipi_self(int vector) =20 void __init hv_apic_init(void) { + if (cc_platform_has(CC_ATTR_SNP_SECURE_AVIC)) + return; + if (ms_hyperv.hints & HV_X64_CLUSTER_IPI_RECOMMENDED) { pr_info("Hyper-V: Using IPI hypercalls\n"); /* --=20 2.25.1