All of lore.kernel.org
 help / color / mirror / Atom feed
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


             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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20260306074422.47694-1-zenghui.yu@linux.dev \
    --to=zenghui.yu@linux.dev \
    --cc=joey.gouly@arm.com \
    --cc=kvmarm@lists.linux.dev \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=maz@kernel.org \
    --cc=oupton@kernel.org \
    --cc=suzuki.poulose@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.