From: Tianyu Lan <tiala@microsoft.com>
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 <mhklinux@outlook.com>
Reviewed-by: Neeraj Upadhyay <Neeraj.Upadhyay@amd.com>
Signed-off-by: Tianyu Lan <tiala@microsoft.com>
---
Change since RFC V3:
- Update title prefix from "x86/Hyper-V" to "x86/hyperv"
---
arch/x86/kernel/cpu/mshyperv.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index c78f860419d6..8f029650f16c 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -463,6 +463,8 @@ static void __init ms_hyperv_init_platform(void)
ms_hyperv.max_vp_index, ms_hyperv.max_lp_index);
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;
--
2.25.1