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a="49895175" X-IronPort-AV: E=Sophos;i="6.15,303,1739865600"; d="scan'208";a="49895175" X-CSE-ConnectionGUID: VdAQK/qJQt6eG+5sb+49/Q== X-CSE-MsgGUID: q/60nqvvSVycJXzm5Fz3FQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.15,303,1739865600"; d="scan'208";a="145158488" From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, jasowang@redhat.com, peterx@redhat.com, ddutile@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, shameerali.kolothum.thodi@huawei.com, joao.m.martins@oracle.com, clement.mathieu--drif@eviden.com, kevin.tian@intel.com, yi.l.liu@intel.com, chao.p.peng@intel.com, Zhenzhong Duan , Marcel Apfelbaum , Paolo Bonzini , Richard Henderson , Eduardo Habkost Subject: [PATCH rfcv3 19/21] intel_iommu: Refresh pasid bind when either SRTP or TE bit is changed Date: Wed, 21 May 2025 19:14:49 +0800 Message-Id: <20250521111452.3316354-20-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250521111452.3316354-1-zhenzhong.duan@intel.com> References: <20250521111452.3316354-1-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=192.198.163.14; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -45 X-Spam_score: -4.6 X-Spam_bar: ---- X-Spam_report: (-4.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.184, 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_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_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: 1747826460092116600 Content-Type: text/plain; charset="utf-8" From: Yi Liu When either 'Set Root Table Pointer' or 'Translation Enable' bit is changed, the pasid bindings on host side become stale and need to be updated. Introduce a helper function vtd_refresh_pasid_bind() for that purpose. Signed-off-by: Yi Liu Signed-off-by: Zhenzhong Duan --- hw/i386/intel_iommu.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index bb21060d7e..b8f3b8effa 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -89,6 +89,7 @@ struct vtd_iotlb_key { =20 static void vtd_address_space_refresh_all(IntelIOMMUState *s); static void vtd_address_space_unmap(VTDAddressSpace *as, IOMMUNotifier *n); +static void vtd_refresh_pasid_bind(IntelIOMMUState *s); =20 static void vtd_pasid_cache_reset_locked(IntelIOMMUState *s); static void vtd_pasid_cache_sync(IntelIOMMUState *s, @@ -3362,6 +3363,7 @@ static void vtd_handle_gcmd_srtp(IntelIOMMUState *s) vtd_set_clear_mask_long(s, DMAR_GSTS_REG, 0, VTD_GSTS_RTPS); vtd_reset_caches(s); vtd_address_space_refresh_all(s); + vtd_refresh_pasid_bind(s); } =20 /* Set Interrupt Remap Table Pointer */ @@ -3396,6 +3398,7 @@ static void vtd_handle_gcmd_te(IntelIOMMUState *s, bo= ol en) =20 vtd_reset_caches(s); vtd_address_space_refresh_all(s); + vtd_refresh_pasid_bind(s); } =20 /* Handle Interrupt Remap Enable/Disable */ @@ -4111,6 +4114,26 @@ static void vtd_replay_guest_pasid_bindings(IntelIOM= MUState *s, } } =20 +static void vtd_refresh_pasid_bind(IntelIOMMUState *s) +{ + VTDPASIDCacheInfo pc_info =3D { .error_happened =3D false, + .type =3D VTD_PASID_CACHE_GLOBAL_INV }; + + /* + * Only when dmar is enabled, should pasid bindings replayed, + * otherwise no need to replay. + */ + if (!s->dmar_enabled) { + return; + } + + if (!s->flts || !s->root_scalable) { + return; + } + + vtd_replay_guest_pasid_bindings(s, &pc_info); +} + /* * This function syncs the pasid bindings between guest and host. * It includes updating the pasid cache in vIOMMU and updating the --=20 2.34.1