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a="84804135" X-IronPort-AV: E=Sophos;i="6.19,215,1754982000"; d="scan'208";a="84804135" X-CSE-ConnectionGUID: NTDe3AgXTLy1/i4THWbCyQ== X-CSE-MsgGUID: /nXASSMWSNqLMlCvYYJGcw== X-ExtLoop1: 1 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, levon@movementarian.org, Zhenzhong Duan Subject: [PATCH v2 2/3] vfio/iommufd: Support unmap all in one ioctl() Date: Thu, 9 Oct 2025 00:01:33 -0400 Message-ID: <20251009040134.334251-3-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20251009040134.334251-1-zhenzhong.duan@intel.com> References: <20251009040134.334251-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=198.175.65.9; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -47 X-Spam_score: -4.8 X-Spam_bar: ---- X-Spam_report: (-4.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.442, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=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 @intel.com) X-ZM-MESSAGEID: 1759982655147154100 Content-Type: text/plain; charset="utf-8" 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 --- 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 68470d552e..336f8fdb04 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 2.47.1