From: Zenghui Yu <zenghui.yu@linux.dev>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org
Cc: maz@kernel.org, oupton@kernel.org, joey.gouly@arm.com,
suzuki.poulose@arm.com,
"Zenghui Yu (Huawei)" <zenghui.yu@linux.dev>
Subject: [PATCH] KVM: arm64: Remove the redundant ISB in __kvm_at_s1e2()
Date: Fri, 6 Mar 2026 15:44:22 +0800 [thread overview]
Message-ID: <20260306074422.47694-1-zenghui.yu@linux.dev> (raw)
From: "Zenghui Yu (Huawei)" <zenghui.yu@linux.dev>
We already have an ISB in __kvm_at() to make the address translation result
visible to subsequent reads of PAR_EL1. Remove the redundant one right
after it.
Signed-off-by: Zenghui Yu (Huawei) <zenghui.yu@linux.dev>
---
arch/arm64/kvm/at.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/arch/arm64/kvm/at.c b/arch/arm64/kvm/at.c
index 6588ea251ed7..c5c5644b1878 100644
--- a/arch/arm64/kvm/at.c
+++ b/arch/arm64/kvm/at.c
@@ -1504,8 +1504,6 @@ int __kvm_at_s1e2(struct kvm_vcpu *vcpu, u32 op, u64 vaddr)
fail = true;
}
- isb();
-
if (!fail)
par = read_sysreg_par();
--
2.53.0
next reply other threads:[~2026-03-06 7:44 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-06 7:44 Zenghui Yu [this message]
2026-03-06 10:48 ` [PATCH] KVM: arm64: Remove the redundant ISB in __kvm_at_s1e2() Marc Zyngier
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