From: Tao Cui <cui.tao@linux.dev>
To: zhaotianrui@loongson.cn, maobibo@loongson.cn
Cc: chenhuacai@kernel.org, kernel@xen0n.name, kvm@vger.kernel.org,
loongarch@lists.linux.dev, linux-kernel@vger.kernel.org,
lixianglai@loongson.cn, cuitao@kylinos.cn, cui.tao@linux.dev
Subject: [PATCH v3 0/2] LoongArch: KVM: Fix timer restore issues
Date: Wed, 15 Jul 2026 18:06:38 +0800 [thread overview]
Message-ID: <20260715100640.1454413-1-cui.tao@linux.dev> (raw)
From: Tao Cui <cuitao@kylinos.cn>
Fix two issues in kvm_restore_timer():
Patch 1 fixes a one-shot timer firing immediately after migration because
vcpu->arch.expire is not migrated.
Patch 2 fixes a division-by-zero crash when a guest programs a periodic
timer with a period value of zero.
Both are in the same function (kvm_restore_timer) and are sent as a
series for convenience.
Tao Cui (2):
LoongArch: KVM: Reload one-shot TVAL on migration destination
LoongArch: KVM: Prevent division by zero in periodic timer restore
arch/loongarch/kvm/timer.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
---
Changes in v3:
- Add patch 2 (division by zero fix, found by Sashiko AI review).
- Reuse the existing now timestamp instead of a redundant ktime_get().
Changes in v2:
- Move the expire check before ktime_before() (suggested by Bibo Mao)
- Remove the old else-if branch that was one-shot only.
--
2.43.0
next reply other threads:[~2026-07-15 10:07 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-15 10:06 Tao Cui [this message]
2026-07-15 10:06 ` [PATCH v3 1/2] LoongArch: KVM: Reload one-shot TVAL on migration destination Tao Cui
2026-07-15 10:06 ` [PATCH v3 2/2] LoongArch: KVM: Prevent division by zero in periodic timer restore Tao Cui
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=20260715100640.1454413-1-cui.tao@linux.dev \
--to=cui.tao@linux.dev \
--cc=chenhuacai@kernel.org \
--cc=cuitao@kylinos.cn \
--cc=kernel@xen0n.name \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lixianglai@loongson.cn \
--cc=loongarch@lists.linux.dev \
--cc=maobibo@loongson.cn \
--cc=zhaotianrui@loongson.cn \
/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.