From: Tianyu Lan <ltykernel@gmail.com>
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, arnd@arndb.de, Neeraj.Upadhyay@amd.com,
tiala@microsoft.com, kvijayab@amd.com,
romank@linux.microsoft.com
Cc: linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org,
linux-kernel@vger.kernel.org,
Michael Kelley <mhklinux@outlook.com>
Subject: [PATCH 1/5] x86/hyperv: Don't use hv apic driver when Secure AVIC is available
Date: Thu, 18 Sep 2025 11:00:19 -0400 [thread overview]
Message-ID: <20250918150023.474021-2-tiala@microsoft.com> (raw)
In-Reply-To: <20250918150023.474021-1-tiala@microsoft.com>
When Secure AVIC is available, the AMD x2apic Secure
AVIC driver will be selected. In that case, have
hv_apic_init() return immediately without doing
anything.
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Signed-off-by: Tianyu Lan <tiala@microsoft.com>
---
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 bfde0a3498b9..e669053b637d 100644
--- a/arch/x86/hyperv/hv_apic.c
+++ b/arch/x86/hyperv/hv_apic.c
@@ -293,6 +293,9 @@ static void hv_send_ipi_self(int vector)
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");
/*
--
2.25.1
next parent reply other threads:[~2025-09-18 15:01 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20250918150023.474021-1-tiala@microsoft.com>
2025-09-18 15:00 ` Tianyu Lan [this message]
2025-09-18 15:00 ` [PATCH 2/5] drivers: hv: Allow vmbus message synic interrupt injected from Hyper-V Tianyu Lan
2025-09-18 15:00 ` [PATCH 3/5] x86/hyperv: Don't use auto-eoi when Secure AVIC is available Tianyu Lan
2025-09-18 15:00 ` [PATCH 4/5] x86/hyperv: Allow Hyper-V to inject STIMER0 interrupts Tianyu Lan
2025-09-18 15:00 ` [PATCH 5/5] x86/Hyper-V: Add Hyper-V specific hvcall to set backing page Tianyu Lan
2025-09-18 15:09 ` Borislav Petkov
2025-09-18 17:11 ` Tianyu Lan
2025-09-18 19:59 ` Borislav Petkov
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