From c52c957e41e75d3f74157acffc53cefa3089ffa7 Mon Sep 17 00:00:00 2001 From: Tianyu Lan Date: Thu, 18 Sep 2025 11:00:21 -0400 Subject: [PATCH] x86/hyperv: Don't use auto-eoi when Secure AVIC is available Hyper-V doesn't support auto-eoi with Secure AVIC. So set the HV_DEPRECATING_AEOI_RECOMMENDED flag to force writing the EOI register after handling an interrupt. Reviewed-by: Michael Kelley Reviewed-by: Neeraj Upadhyay Signed-off-by: Tianyu Lan Signed-off-by: Wei Liu --- arch/x86/kernel/cpu/mshyperv.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index c4febdbcfe4d8..217a41b63df36 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -470,6 +470,9 @@ static void __init ms_hyperv_init_platform(void) hv_identify_partition_type(); + if (cc_platform_has(CC_ATTR_SNP_SECURE_AVIC)) + ms_hyperv.hints |= HV_DEPRECATING_AEOI_RECOMMENDED; + if (ms_hyperv.hints & HV_X64_HYPERV_NESTED) { hv_nested = true; pr_info("Hyper-V: running on a nested hypervisor\n"); -- 2.47.3