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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1761135546; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=A5Ad/N+nePZpXSyZ1Bg+sV63303rHbg2A64+yZ90JzY=; b=adkJtzeZXAjVaC/Gj0tKOCcjXnfzY3VcbmLWgQcl2c+3+WsCM/fEhCj6h6fwGPXjZICyia 5H9WHkGxT8xyiyjgasML3yTkSd95a+Sw5KBy/qyfAGnxKhtTeJnqi6W8YaN6k5hC7KQ/rl 7gW5viBzH0t5axPaVGbdLuvhjCJY6P8= X-MC-Unique: OnecN58qMZOwA-7dlW0rjQ-1 X-Mimecast-MFC-AGG-ID: OnecN58qMZOwA-7dlW0rjQ_1761135543 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , Zhenzhong Duan , Markus Armbruster , Steve Sistare , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PULL 05/12] accel/kvm: Fix an erroneous check on coalesced_mmio_ring Date: Wed, 22 Oct 2025 14:18:39 +0200 Message-ID: <20251022121846.874152-6-clg@redhat.com> In-Reply-To: <20251022121846.874152-1-clg@redhat.com> References: <20251022121846.874152-1-clg@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1761135700654154100 From: Zhenzhong Duan According to KVM uAPI, coalesced mmio page is KVM_COALESCED_MMIO_PAGE_OFFSET offset from kvm_run pages. For x86 it's 2 pages offset, for arm it's 1 page offset currently. We shouldn't presume it's hardcoded 1 page or else coalesced_mmio_ring will not be cleared in do_kvm_destroy_vcpu() in x86. Fixes: 7ed0919119b0 ("migration: close kvm after cpr") Cc: Markus Armbruster Signed-off-by: Zhenzhong Duan Reviewed-by: Steve Sistare Link: https://lore.kernel.org/qemu-devel/20250928085432.40107-6-zhenzhong.d= uan@intel.com Signed-off-by: C=C3=A9dric Le Goater --- accel/kvm/kvm-all.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 56031925c4e9e6d46fb0e026e7b8dede2dabc7d2..f9254ae6546671e4569c190a098= 447becbdac0e0 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -525,7 +525,8 @@ static int do_kvm_destroy_vcpu(CPUState *cpu) } =20 /* If I am the CPU that created coalesced_mmio_ring, then discard it */ - if (s->coalesced_mmio_ring =3D=3D (void *)cpu->kvm_run + PAGE_SIZE) { + if (s->coalesced_mmio_ring =3D=3D + (void *)cpu->kvm_run + s->coalesced_mmio * PAGE_SIZE) { s->coalesced_mmio_ring =3D NULL; } =20 --=20 2.51.0