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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1761135553; 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=nYk2A4wVmkBhIJRz+4s4bB8w/6H5fxKaUobwydL0CgU=; b=DHbVhc6R/vVZctxeliqsw+hcHdGxldO2D4gyyj1/WnjvL0DlYlc+VFM0f6MwyIL8pSxltT 0X9s1OWyKhanYmLpu45RoRUx/wNTo/eAisWs28598NuKIHmcFKwVOESqhcUak5/yeAXy0I tFKYQzti0p4thF7cPX68iFrmqObUc90= X-MC-Unique: xsQ_4BYwN_ypD3DGopRlUQ-1 X-Mimecast-MFC-AGG-ID: xsQ_4BYwN_ypD3DGopRlUQ_1761135549 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , Zhenzhong Duan , =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Subject: [PULL 07/12] vfio/iommufd: Support unmap all in one ioctl() Date: Wed, 22 Oct 2025 14:18:41 +0200 Message-ID: <20251022121846.874152-8-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=170.10.129.124; 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: 1761135698018158500 From: Zhenzhong Duan IOMMUFD kernel uAPI supports unmapping whole address space in one call with [iova, size] set to [0, UINT64_MAX], this can simplify iommufd_cdev_unmap() a bit. See iommufd_ioas_unmap() in kernel for details. Signed-off-by: Zhenzhong Duan Reviewed-by: C=C3=A9dric Le Goater Link: https://lore.kernel.org/qemu-devel/20251009040134.334251-3-zhenzhong.= duan@intel.com Signed-off-by: C=C3=A9dric Le Goater --- hw/vfio/iommufd.c | 15 +-------------- 1 file changed, 1 insertion(+), 14 deletions(-) diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c index 24a99efa87f4df268d0df7198f26bba37976874b..fc9cd9d22ff2d6f126d3c0964d7= 033eee33ed9f2 100644 --- a/hw/vfio/iommufd.c +++ b/hw/vfio/iommufd.c @@ -62,21 +62,8 @@ static int iommufd_cdev_unmap(const VFIOContainer *bcont= ainer, { const VFIOIOMMUFDContainer *container =3D VFIO_IOMMU_IOMMUFD(bcontaine= r); =20 - /* unmap in halves */ if (unmap_all) { - Int128 llsize =3D int128_rshift(int128_2_64(), 1); - int ret; - - ret =3D iommufd_backend_unmap_dma(container->be, container->ioas_i= d, - 0, int128_get64(llsize)); - - if (ret =3D=3D 0) { - ret =3D iommufd_backend_unmap_dma(container->be, container->io= as_id, - int128_get64(llsize), - int128_get64(llsize)); - } - - return ret; + size =3D UINT64_MAX; } =20 /* TODO: Handle dma_unmap_bitmap with iotlb args (migration) */ --=20 2.51.0