From patchwork Mon Sep 30 09:26:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Duan, Zhenzhong" X-Patchwork-Id: 13815761 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 74D2DCF649E for ; Mon, 30 Sep 2024 09:33:20 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1svCjd-0001Qi-6o; Mon, 30 Sep 2024 05:30:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1svCjW-0000wu-JD for qemu-devel@nongnu.org; Mon, 30 Sep 2024 05:30:26 -0400 Received: from mgamail.intel.com ([198.175.65.21]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1svCjU-000759-11 for qemu-devel@nongnu.org; Mon, 30 Sep 2024 05:30:22 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1727688620; x=1759224620; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=J6R3jnEybu2xjaU4h8pul7wPSvHytISEdK4qub/X37M=; b=OvlFzB2tTjl6ZaCZph0fSIvyNqliRDIWqqlDkz5kug9nfkOFb84ifJN4 NDE+fPMPQQBPND55T59ts+Eg5bza1AC91NyjLrdGkMZcvw/0s8mG+yjaq hh/VHjcI//E9hhI8WYeaSH6YoxLsDT5YtFpo+4UziADSxjNC4T5siIICp OQwbTyFKz79OZCX0VsCcNQxvOLgTIRbUn8IiO53ocokCX+9X/W49DtByn bJr+xARmBe3vfZ3N8aNe+ym/leAxnF8U+Y0CdrFIA6r9Pa4sgq5y8aodU SkhJcIcLGyb579d06wxyZx6aDyabKEXO2TMXSqTEGJ/KuPij/or5KFrut w==; X-CSE-ConnectionGUID: HMLursxKQqmdwlgoKfVlHw== X-CSE-MsgGUID: Jof3Ww6tTqqbM7TSeCLLOw== X-IronPort-AV: E=McAfee;i="6700,10204,11210"; a="26721784" X-IronPort-AV: E=Sophos;i="6.11,165,1725346800"; d="scan'208";a="26721784" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2024 02:30:18 -0700 X-CSE-ConnectionGUID: +bYwufUXRwix3GZs0S0HtQ== X-CSE-MsgGUID: HRemzdvBTFW7UUJclRB6PQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,165,1725346800"; d="scan'208";a="77749826" Received: from spr-s2600bt.bj.intel.com ([10.240.192.127]) by fmviesa004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Sep 2024 02:30:14 -0700 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, peterx@redhat.com, jasowang@redhat.com, jgg@nvidia.com, nicolinc@nvidia.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 , Paolo Bonzini , Richard Henderson , Eduardo Habkost , Marcel Apfelbaum Subject: [PATCH v4 09/17] intel_iommu: Flush stage-1 cache in iotlb invalidation Date: Mon, 30 Sep 2024 17:26:23 +0800 Message-Id: <20240930092631.2997543-10-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240930092631.2997543-1-zhenzhong.duan@intel.com> References: <20240930092631.2997543-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=198.175.65.21; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.095, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org According to spec, Page-Selective-within-Domain Invalidation (11b): 1. IOTLB entries caching second-stage mappings (PGTT=010b) or pass-through (PGTT=100b) mappings associated with the specified domain-id and the input-address range are invalidated. 2. IOTLB entries caching first-stage (PGTT=001b) or nested (PGTT=011b) mapping associated with specified domain-id are invalidated. So per spec definition the Page-Selective-within-Domain Invalidation needs to flush first stage and nested cached IOTLB enties as well. We don't support nested yet and pass-through mapping is never cached, so what in iotlb cache are only first-stage and second-stage mappings. Add a tag pgtt in VTDIOTLBEntry to mark PGTT type of the mapping and invalidate entries based on PGTT type. Signed-off-by: Zhenzhong Duan Reviewed-by: Clément Mathieu--Drif Acked-by: Jason Wang Reviewed-by: Yi Liu --- include/hw/i386/intel_iommu.h | 1 + hw/i386/intel_iommu.c | 27 +++++++++++++++++++++------ 2 files changed, 22 insertions(+), 6 deletions(-) diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h index fe9057c50d..b843d069cc 100644 --- a/include/hw/i386/intel_iommu.h +++ b/include/hw/i386/intel_iommu.h @@ -155,6 +155,7 @@ struct VTDIOTLBEntry { uint64_t pte; uint64_t mask; uint8_t access_flags; + uint8_t pgtt; }; /* VT-d Source-ID Qualifier types */ diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 99bb3f42ea..46bde1ad40 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -305,9 +305,21 @@ static gboolean vtd_hash_remove_by_page(gpointer key, gpointer value, VTDIOTLBPageInvInfo *info = (VTDIOTLBPageInvInfo *)user_data; uint64_t gfn = (info->addr >> VTD_PAGE_SHIFT_4K) & info->mask; uint64_t gfn_tlb = (info->addr & entry->mask) >> VTD_PAGE_SHIFT_4K; - return (entry->domain_id == info->domain_id) && - (((entry->gfn & info->mask) == gfn) || - (entry->gfn == gfn_tlb)); + + if (entry->domain_id != info->domain_id) { + return false; + } + + /* + * According to spec, IOTLB entries caching first-stage (PGTT=001b) or + * nested (PGTT=011b) mapping associated with specified domain-id are + * invalidated. Nested isn't supported yet, so only need to check 001b. + */ + if (entry->pgtt == VTD_SM_PASID_ENTRY_FLT) { + return true; + } + + return (entry->gfn & info->mask) == gfn || entry->gfn == gfn_tlb; } /* Reset all the gen of VTDAddressSpace to zero and set the gen of @@ -382,7 +394,7 @@ out: static void vtd_update_iotlb(IntelIOMMUState *s, uint16_t source_id, uint16_t domain_id, hwaddr addr, uint64_t pte, uint8_t access_flags, uint32_t level, - uint32_t pasid) + uint32_t pasid, uint8_t pgtt) { VTDIOTLBEntry *entry = g_malloc(sizeof(*entry)); struct vtd_iotlb_key *key = g_malloc(sizeof(*key)); @@ -400,6 +412,7 @@ static void vtd_update_iotlb(IntelIOMMUState *s, uint16_t source_id, entry->access_flags = access_flags; entry->mask = vtd_pt_level_page_mask(level); entry->pasid = pasid; + entry->pgtt = pgtt; key->gfn = gfn; key->sid = source_id; @@ -2069,7 +2082,7 @@ static bool vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus, bool is_fpd_set = false; bool reads = true; bool writes = true; - uint8_t access_flags; + uint8_t access_flags, pgtt; bool rid2pasid = (pasid == PCI_NO_PASID) && s->root_scalable; VTDIOTLBEntry *iotlb_entry; @@ -2177,9 +2190,11 @@ static bool vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus, if (s->scalable_modern && s->root_scalable) { ret_fr = vtd_iova_to_flpte(s, &ce, addr, is_write, &pte, &level, &reads, &writes, s->aw_bits, pasid); + pgtt = VTD_SM_PASID_ENTRY_FLT; } else { ret_fr = vtd_iova_to_slpte(s, &ce, addr, is_write, &pte, &level, &reads, &writes, s->aw_bits, pasid); + pgtt = VTD_SM_PASID_ENTRY_SLT; } if (ret_fr) { vtd_report_fault(s, -ret_fr, is_fpd_set, source_id, @@ -2190,7 +2205,7 @@ static bool vtd_do_iommu_translate(VTDAddressSpace *vtd_as, PCIBus *bus, page_mask = vtd_pt_level_page_mask(level); access_flags = IOMMU_ACCESS_FLAG(reads, writes); vtd_update_iotlb(s, source_id, vtd_get_domain_id(s, &ce, pasid), - addr, pte, access_flags, level, pasid); + addr, pte, access_flags, level, pasid, pgtt); out: vtd_iommu_unlock(s); entry->iova = addr & page_mask;