linux-kernel - [PATCH] KVM: arm64: nested: Fix VA sign extension in VNCR/TLBI paths

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Message-ID: <20250901124520.54259-1-wlsrbwjd7232@gmail.com>
Date: Mon,  1 Sep 2025 21:45:20 +0900
From: Gyujeong Jin <wlsrbwjd7232@...il.com>
To: maz@...nel.org,
	oliver.upton@...ux.dev
Cc: joey.gouly@....com,
	suzuki.poulose@....com,
	yuzenghui@...wei.com,
	catalin.marinas@....com,
	will@...nel.org,
	kvmarm@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	wlsrbwjd7232@...il.com,
	gyutrange <wlsrbwjd643@...er.com>
Subject: [PATCH] KVM: arm64: nested: Fix VA sign extension in VNCR/TLBI paths

From: gyutrange <wlsrbwjd643@...er.com>

Signed-off-by: gyutrange <wlsrbwjd643@...er.com>
---
 arch/arm64/kvm/nested.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/kvm/nested.c b/arch/arm64/kvm/nested.c
index 77db81bae86f..eaa6dd9da086 100644
--- a/arch/arm64/kvm/nested.c
+++ b/arch/arm64/kvm/nested.c
@@ -1169,7 +1169,7 @@ int kvm_vcpu_allocate_vncr_tlb(struct kvm_vcpu *vcpu)
 
 static u64 read_vncr_el2(struct kvm_vcpu *vcpu)
 {
-	return (u64)sign_extend64(__vcpu_sys_reg(vcpu, VNCR_EL2), 48);
+	return (u64)sign_extend64(__vcpu_sys_reg(vcpu, VNCR_EL2), 47);
 }
 
 static int kvm_translate_vncr(struct kvm_vcpu *vcpu)
-- 
2.43.0