From patchwork Mon Mar 30 04:24:59 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 11464599 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 7916113A4 for ; Mon, 30 Mar 2020 04:28:58 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 5693C206F6 for ; Mon, 30 Mar 2020 04:28:58 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5693C206F6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:44766 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jIm2j-0001Vl-Fd for patchwork-qemu-devel@patchwork.kernel.org; Mon, 30 Mar 2020 00:28:57 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:38023) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jIlu9-0002D2-Nj for qemu-devel@nongnu.org; Mon, 30 Mar 2020 00:20:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jIlu7-0008Ul-RK for qemu-devel@nongnu.org; Mon, 30 Mar 2020 00:20:05 -0400 Received: from mga07.intel.com ([134.134.136.100]:12574) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jIlu7-0007ph-JR for qemu-devel@nongnu.org; Mon, 30 Mar 2020 00:20:03 -0400 IronPort-SDR: M6kRrJMeU37LIEFjFqYvm6ShzlBbNX1LC67UsafFKOCRrP2/OvAyjfb6MWTh9m6v/gDbJVy1mD /n6IonmZZGIQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2020 21:19:16 -0700 IronPort-SDR: wOgM4EatcQOrvGteBb4pGpHWeGaB0HRittS2zv5UqECBTSjiHpIC/c2gweZ9D9nSAkYobGP1Wx odtMhe2MdkjQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,322,1580803200"; d="scan'208";a="327632072" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga001.jf.intel.com with ESMTP; 29 Mar 2020 21:19:16 -0700 From: Liu Yi L To: qemu-devel@nongnu.org, alex.williamson@redhat.com, peterx@redhat.com Subject: [PATCH v2 20/22] intel_iommu: propagate PASID-based iotlb invalidation to host Date: Sun, 29 Mar 2020 21:24:59 -0700 Message-Id: <1585542301-84087-21-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1585542301-84087-1-git-send-email-yi.l.liu@intel.com> References: <1585542301-84087-1-git-send-email-yi.l.liu@intel.com> X-detected-operating-system: by eggs.gnu.org: FreeBSD 9.x [fuzzy] X-Received-From: 134.134.136.100 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: jean-philippe@linaro.org, kevin.tian@intel.com, yi.l.liu@intel.com, Yi Sun , Eduardo Habkost , kvm@vger.kernel.org, mst@redhat.com, jun.j.tian@intel.com, eric.auger@redhat.com, yi.y.sun@intel.com, Jacob Pan , pbonzini@redhat.com, hao.wu@intel.com, Richard Henderson , david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" This patch propagates PASID-based iotlb invalidation to host. Intel VT-d 3.0 supports nested translation in PASID granular. Guest SVA support could be implemented by configuring nested translation on specific PASID. This is also known as dual stage DMA translation. Under such configuration, guest owns the GVA->GPA translation which is configured as first level page table in host side for a specific pasid, and host owns GPA->HPA translation. As guest owns first level translation table, piotlb invalidation should be propagated to host since host IOMMU will cache first level page table related mappings during DMA address translation. This patch traps the guest PASID-based iotlb flush and propagate it to host. v1 -> v2: removed the valid check to vtd_pasid_as instance as v2 ensures all vtd_pasid_as instance should be valid Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Yi Sun Cc: Paolo Bonzini Cc: Richard Henderson Cc: Eduardo Habkost Signed-off-by: Liu Yi L --- hw/i386/intel_iommu.c | 117 +++++++++++++++++++++++++++++++++++++++++ hw/i386/intel_iommu_internal.h | 7 +++ 2 files changed, 124 insertions(+) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 6114dd8..02ad90a 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -3045,16 +3045,133 @@ static bool vtd_process_pasid_desc(IntelIOMMUState *s, return true; } +/** + * Caller of this function should hold iommu_lock. + */ +static void vtd_invalidate_piotlb(IntelIOMMUState *s, + VTDBus *vtd_bus, + int devfn, + DualIOMMUStage1Cache *stage1_cache) +{ + VTDHostIOMMUContext *vtd_dev_icx; + HostIOMMUContext *iommu_ctx; + + vtd_dev_icx = vtd_bus->dev_icx[devfn]; + if (!vtd_dev_icx) { + goto out; + } + iommu_ctx = vtd_dev_icx->iommu_ctx; + if (!iommu_ctx) { + goto out; + } + if (host_iommu_ctx_flush_stage1_cache(iommu_ctx, stage1_cache)) { + error_report("Cache flush failed"); + } +out: + return; +} + +/** + * This function is a loop function for the s->vtd_pasid_as + * list with VTDPIOTLBInvInfo as execution filter. It propagates + * the piotlb invalidation to host. Caller of this function + * should hold iommu_lock. + */ +static void vtd_flush_pasid_iotlb(gpointer key, gpointer value, + gpointer user_data) +{ + VTDPIOTLBInvInfo *piotlb_info = user_data; + VTDPASIDAddressSpace *vtd_pasid_as = value; + VTDPASIDCacheEntry *pc_entry = &vtd_pasid_as->pasid_cache_entry; + uint16_t did; + + did = vtd_pe_get_domain_id(&pc_entry->pasid_entry); + + if ((piotlb_info->domain_id == did) && + (piotlb_info->pasid == vtd_pasid_as->pasid)) { + vtd_invalidate_piotlb(vtd_pasid_as->iommu_state, + vtd_pasid_as->vtd_bus, + vtd_pasid_as->devfn, + piotlb_info->stage1_cache); + } + + /* + * TODO: needs to add QEMU piotlb flush when QEMU piotlb + * infrastructure is ready. For now, it is enough for passthru + * devices. + */ +} + static void vtd_piotlb_pasid_invalidate(IntelIOMMUState *s, uint16_t domain_id, uint32_t pasid) { + VTDPIOTLBInvInfo piotlb_info; + DualIOMMUStage1Cache *stage1_cache; + struct iommu_cache_invalidate_info *cache_info; + + stage1_cache = g_malloc0(sizeof(*stage1_cache)); + stage1_cache->pasid = pasid; + + cache_info = &stage1_cache->cache_info; + cache_info->version = IOMMU_UAPI_VERSION; + cache_info->cache = IOMMU_CACHE_INV_TYPE_IOTLB; + cache_info->granularity = IOMMU_INV_GRANU_PASID; + cache_info->pasid_info.pasid = pasid; + cache_info->pasid_info.flags = IOMMU_INV_PASID_FLAGS_PASID; + + piotlb_info.domain_id = domain_id; + piotlb_info.pasid = pasid; + piotlb_info.stage1_cache = stage1_cache; + + vtd_iommu_lock(s); + /* + * Here loops all the vtd_pasid_as instances in s->vtd_pasid_as + * to find out the affected devices since piotlb invalidation + * should check pasid cache per architecture point of view. + */ + g_hash_table_foreach(s->vtd_pasid_as, + vtd_flush_pasid_iotlb, &piotlb_info); + vtd_iommu_unlock(s); + g_free(stage1_cache); } static void vtd_piotlb_page_invalidate(IntelIOMMUState *s, uint16_t domain_id, uint32_t pasid, hwaddr addr, uint8_t am, bool ih) { + VTDPIOTLBInvInfo piotlb_info; + DualIOMMUStage1Cache *stage1_cache; + struct iommu_cache_invalidate_info *cache_info; + + stage1_cache = g_malloc0(sizeof(*stage1_cache)); + stage1_cache->pasid = pasid; + + cache_info = &stage1_cache->cache_info; + cache_info->version = IOMMU_UAPI_VERSION; + cache_info->cache = IOMMU_CACHE_INV_TYPE_IOTLB; + cache_info->granularity = IOMMU_INV_GRANU_ADDR; + cache_info->addr_info.flags = IOMMU_INV_ADDR_FLAGS_PASID; + cache_info->addr_info.flags |= ih ? IOMMU_INV_ADDR_FLAGS_LEAF : 0; + cache_info->addr_info.pasid = pasid; + cache_info->addr_info.addr = addr; + cache_info->addr_info.granule_size = 1 << (12 + am); + cache_info->addr_info.nb_granules = 1; + + piotlb_info.domain_id = domain_id; + piotlb_info.pasid = pasid; + piotlb_info.stage1_cache = stage1_cache; + + vtd_iommu_lock(s); + /* + * Here loops all the vtd_pasid_as instances in s->vtd_pasid_as + * to find out the affected devices since piotlb invalidation + * should check pasid cache per architecture point of view. + */ + g_hash_table_foreach(s->vtd_pasid_as, + vtd_flush_pasid_iotlb, &piotlb_info); + vtd_iommu_unlock(s); + g_free(stage1_cache); } static bool vtd_process_piotlb_desc(IntelIOMMUState *s, diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h index 5a49d5b..85ebaa5 100644 --- a/hw/i386/intel_iommu_internal.h +++ b/hw/i386/intel_iommu_internal.h @@ -556,6 +556,13 @@ struct VTDPASIDCacheInfo { VTD_PASID_CACHE_DEVSI) typedef struct VTDPASIDCacheInfo VTDPASIDCacheInfo; +struct VTDPIOTLBInvInfo { + uint16_t domain_id; + uint32_t pasid; + DualIOMMUStage1Cache *stage1_cache; +}; +typedef struct VTDPIOTLBInvInfo VTDPIOTLBInvInfo; + /* PASID Table Related Definitions */ #define VTD_PASID_DIR_BASE_ADDR_MASK (~0xfffULL) #define VTD_PASID_TABLE_BASE_ADDR_MASK (~0xfffULL)