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LoongArch: KVM: Fix "unreliable stack" for kvm_exc_entry

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Insert the appropriate UNWIND hint into the kvm_exc_entry assembly
function to guide the generation of correct ORC table entries, thereby
solving the timeout problem ("unreliable stack") while loading the
livepatch-sample module on a physical machine running virtual machines
with multiple vcpus.

Cc: stable@vger.kernel.org
Signed-off-by: Xianglai Li <lixianglai@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Xianglai Li
2026-05-04 09:00:37 +08:00
committed by Huacai Chen
parent 5203012fa6
commit b323a441da
1 changed files with 1 additions and 1 deletions
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arch/loongarch/kvm/switch.S
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@@ -111,7 +111,7 @@
.p2align PAGE_SHIFT
.cfi_sections .debug_frame
SYM_CODE_START(kvm_exc_entry)
UNWIND_HINT_UNDEFINED
UNWIND_HINT_END_OF_STACK
csrwr a2, KVM_TEMP_KS
csrrd a2, KVM_VCPU_KS
addi.d a2, a2, KVM_VCPU_ARCH