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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1719823840; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=FLOs2MLWeFfGVRFiNyOnYfkh03vw78pTCpOtytRgy10=; b=IXjY1dSJcWDTHUzc+IcrjktsmkOKWl5ZHpe6o4NdUjgEGVXYLZ4UfjAO7fiwrx/uNepsgu Hdl/M4hz4WmKMpesMeF4qUcIFCPzZV+EaT2WQ70KoCd1owhQTE++PdpWdV8DkpiqMV+8r1 FiMbRYEUGZaNbcMYdLkbiR5j8inWrcs= X-MC-Unique: pGNGqp9TO1CkJC1Yzj2Yow-1 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, mst@redhat.com, jean-philippe@linaro.org, peter.maydell@linaro.org, clg@redhat.com, yanghliu@redhat.com, zhenzhong.duan@intel.com, alex.williamson@redhat.com Subject: [PATCH v2 7/7] virtio-iommu: Revert transient enablement of IOMMU MR in bypass mode Date: Mon, 1 Jul 2024 10:48:59 +0200 Message-ID: <20240701084957.1567641-8-eric.auger@redhat.com> In-Reply-To: <20240701084957.1567641-1-eric.auger@redhat.com> References: <20240701084957.1567641-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.15 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=170.10.129.124; envelope-from=eric.auger@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_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable 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: 1719823994602100005 In 94df5b2180d6 ("virtio-iommu: Fix 64kB host page size VFIO device assignment"), in case of bypass mode, we transiently enabled the IOMMU MR to allow the set_page_size_mask() to be called and pass information about the page size mask constraint of cold plugged VFIO devices. Now we do not use the IOMMU MR callback anymore, we can just get rid of this hack. Signed-off-by: Eric Auger Reviewed-by: C=C3=A9dric Le Goater Reviewed-by: Zhenzhong Duan --- hw/virtio/virtio-iommu.c | 12 ------------ 1 file changed, 12 deletions(-) diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index dc337a6805..72011d2d11 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -1387,18 +1387,6 @@ static void virtio_iommu_freeze_granule(Notifier *no= tifier, void *data) VirtIOIOMMU *s =3D container_of(notifier, VirtIOIOMMU, machine_done); int granule; =20 - if (likely(s->config.bypass)) { - /* - * Transient IOMMU MR enable to collect page_size_mask requirements - * through memory_region_iommu_set_page_size_mask() called by - * VFIO region_add() callback - */ - s->config.bypass =3D false; - virtio_iommu_switch_address_space_all(s); - /* restore default */ - s->config.bypass =3D true; - virtio_iommu_switch_address_space_all(s); - } s->granule_frozen =3D true; granule =3D ctz64(s->config.page_size_mask); trace_virtio_iommu_freeze_granule(BIT_ULL(granule)); --=20 2.41.0