From nobody Mon Feb 9 09:34:27 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1562412958; cv=none; d=zoho.com; s=zohoarc; b=U6cstsGPUufsfABMjb8wAYHm3ynVRVCMa8jP5KAoS3X/hCS3eyL2BV9TIEOhqDSp89KiffS0CPgeEdfY9pidvYHZ/bv5k8vZHTuYI5pmrLe/UX04skB3zC2f8Yn0jUHnVGqJg50zKJO2ZGydnFo65v3lewnH7z/FWrLeHDJGqYY= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1562412958; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=LE/V7uqubJ7vOdj6PZvfs3p9RY2Cd9wR6zUY7kXc+XM=; b=j+DWr+ikFd7cLkmvC1Q4dyqcR+nr7ovSUAU6k+WvZxzNlETEQGcZ+3t70RfBbxzYcQ5fcSuNPfEG3r3WKP9WPIAlsR3SVegvXJQ8DoD1A7rmlJAgJLQxxdaisd5XHN6ng4e96qFL3u2MqpAEe9gtVdDPYOdBitViEJxOKs4+TPI= ARC-Authentication-Results: i=1; mx.zoho.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1562412958054390.5739392734382; Sat, 6 Jul 2019 04:35:58 -0700 (PDT) Received: from localhost ([::1]:58848 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hjiys-0007mt-F6 for importer@patchew.org; Sat, 06 Jul 2019 07:35:52 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52593) by lists.gnu.org with esmtp (Exim 4.86_2) (envelope-from ) id 1hjijT-0003M6-KG for qemu-devel@nongnu.org; Sat, 06 Jul 2019 07:19:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1hjijR-0006Fb-Ar for qemu-devel@nongnu.org; Sat, 06 Jul 2019 07:19:55 -0400 Received: from mga14.intel.com ([192.55.52.115]:2961) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1hjijM-0005e0-L0 for qemu-devel@nongnu.org; Sat, 06 Jul 2019 07:19:50 -0400 Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 06 Jul 2019 04:19:27 -0700 Received: from yiliu-dev.bj.intel.com ([10.238.156.139]) by fmsmga005.fm.intel.com with ESMTP; 06 Jul 2019 04:19:25 -0700 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.63,458,1557212400"; d="scan'208";a="363355039" From: Liu Yi L To: qemu-devel@nongnu.org, mst@redhat.com, pbonzini@redhat.com, alex.williamson@redhat.com, peterx@redhat.com Date: Fri, 5 Jul 2019 19:01:46 +0800 Message-Id: <1562324511-2910-14-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1562324511-2910-1-git-send-email-yi.l.liu@intel.com> References: <1562324511-2910-1-git-send-email-yi.l.liu@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 192.55.52.115 Subject: [Qemu-devel] [RFC v1 13/18] intel_iommu: flush pasid cache after a DSI context cache flush X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: tianyu.lan@intel.com, kevin.tian@intel.com, yi.l.liu@intel.com, Yi Sun , kvm@vger.kernel.org, jun.j.tian@intel.com, eric.auger@redhat.com, yi.y.sun@intel.com, Jacob Pan , david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" This patch flushes pasid cache after a device selective context cache flush. This is a behavior to ensure safety. Actually, programmer should issue a pasid cache flush following a device selective context cache invalidation. TODO: global and domain selective context cache flush should also be followed with a proper pasid cache flush. Also needs to consider pasid bind replay. Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Yi Sun Signed-off-by: Liu Yi L --- hw/i386/intel_iommu.c | 22 ++++++++++++++++++++++ hw/i386/intel_iommu_internal.h | 2 ++ hw/i386/trace-events | 1 + 3 files changed, 25 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index d897a52..3b213a4 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -70,6 +70,8 @@ static void vtd_pasid_cache_reset(IntelIOMMUState *s); static int vtd_pasid_cache_psi(IntelIOMMUState *s, uint16_t domain_id, uint32_t pasid); +static void vtd_pasid_cache_devsi(IntelIOMMUState *s, + uint16_t devfn); static VTDContextCacheEntry *vtd_find_context_cache(IntelIOMMUState *s, PCIBus *bus, int devfn= ); static void vtd_invalidate_pe_cache(IntelIOMMUState *s, @@ -1955,6 +1957,7 @@ static void vtd_context_device_invalidate(IntelIOMMUS= tate *s, * check if the device has been bound to any pasid * invoke pasid_unbind regards to each bound pasid */ + vtd_pasid_cache_devsi(s, devfn_it); } } } @@ -3686,6 +3689,11 @@ static inline bool vtd_pc_is_pasid_si(struct VTDPASI= DCacheInfo *pc_info) return pc_info->flags & VTD_PASID_CACHE_PASIDSI; } =20 +static inline bool vtd_pc_is_dev_si(struct VTDPASIDCacheInfo *pc_info) +{ + return pc_info->flags & VTD_PASID_CACHE_DEVSI; +} + /** * This function is used to clear pasid_cache_gen of cached pasid * entry in vtd_pasid_as instance. Caller of this function should @@ -3709,6 +3717,7 @@ static gboolean vtd_flush_pasid(gpointer key, gpointe= r value, pasid =3D vtd_pasid_as->pasid; devfn =3D vtd_pasid_as->devfn; if (vtd_pasid_as->pasid_cache_entry.pasid_cache_gen && + (vtd_pc_is_dev_si(pc_info) ? (pc_info->devfn =3D=3D devfn) : 1) && (vtd_pc_is_dom_si(pc_info) ? (pc_info->domain_id =3D=3D did) : 1) = && (vtd_pc_is_pasid_si(pc_info) ? (pc_info->pasid =3D=3D pasid) : 1))= { /* @@ -3917,6 +3926,19 @@ static int vtd_pasid_cache_psi(IntelIOMMUState *s, return 0; } =20 +static void vtd_pasid_cache_devsi(IntelIOMMUState *s, + uint16_t devfn) +{ + VTDPASIDCacheInfo pc_info; + + trace_vtd_pasid_cache_devsi(devfn); + + pc_info.flags =3D VTD_PASID_CACHE_DEVSI; + pc_info.devfn =3D devfn; + + g_hash_table_foreach_remove(s->vtd_pasid_as, vtd_flush_pasid, &pc_info= ); +} + /** * Caller of this function should hold iommu_lock */ diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h index f9a4ac6..021d358 100644 --- a/hw/i386/intel_iommu_internal.h +++ b/hw/i386/intel_iommu_internal.h @@ -485,9 +485,11 @@ typedef enum VTDPASIDOp VTDPASIDOp; struct VTDPASIDCacheInfo { #define VTD_PASID_CACHE_DOMSI (1ULL << 0); #define VTD_PASID_CACHE_PASIDSI (1ULL << 1); +#define VTD_PASID_CACHE_DEVSI (1ULL << 2); uint32_t flags; uint16_t domain_id; uint32_t pasid; + uint16_t devfn; }; typedef struct VTDPASIDCacheInfo VTDPASIDCacheInfo; =20 diff --git a/hw/i386/trace-events b/hw/i386/trace-events index 7912ae1..25bd6a4 100644 --- a/hw/i386/trace-events +++ b/hw/i386/trace-events @@ -26,6 +26,7 @@ vtd_pasid_cache_reset(void) "" vtd_pasid_cache_gsi(void) "" vtd_pasid_cache_dsi(uint16_t domain) "Domian slective PC invalidation doma= in 0x%"PRIx16 vtd_pasid_cache_psi(uint16_t domain, uint32_t pasid) "PASID slective PC in= validation domain 0x%"PRIx16" pasid 0x%"PRIx32 +vtd_pasid_cache_devsi(uint16_t devfn) "Dev slective PC invalidation dev: 0= x%"PRIx16 vtd_re_not_present(uint8_t bus) "Root entry bus %"PRIu8" not present" vtd_ce_not_present(uint8_t bus, uint8_t devfn) "Context entry bus %"PRIu8"= devfn %"PRIu8" not present" vtd_iotlb_page_hit(uint16_t sid, uint64_t addr, uint64_t slpte, uint16_t d= omain) "IOTLB page hit sid 0x%"PRIx16" iova 0x%"PRIx64" slpte 0x%"PRIx64" d= omain 0x%"PRIx16 --=20 2.7.4