From nobody Mon Feb 9 07:56:42 2026 Delivered-To: importer@patchew.org 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; Authentication-Results: mx.zohomail.com; spf=pass (zohomail.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=1585542296; cv=none; d=zohomail.com; s=zohoarc; b=C+RrSnPjLswseO209RGNfefijbZ4sMIJW1ijacT1G8SmKqCe4DMpwkVhbCQCDFW6dTRbXylh/qN5g6mS/u6uP/zivK19yR9i60eI02x6RX9ecYkq75RyTxRJDZ36VOdAhEwL28teSly8Lt2ntE7iAfqIKlMfxRqGpMcOB2Go4QU= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1585542296; 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; bh=HU9vST7oS9fL6X7PKxwurjcGEN+PKlpHaweBEaJN7Vw=; b=e2Oe77IQZ63k0GqQnDBOhzBZHFPH6uMuc9EfDlYpb9x7dCiiCYXLlwF5Gi0hjr056HA2q2whimcb5Z84I0cYaHJqb8gXJhx4jwMkvlX5C8aeqJDE40q/BMKXi4SVjUI++Eo2MHXhpPUaxf1ZKjNtCRoRgXhPF3y6WujWUx/AFBM= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.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 158554229695597.65626493569596; Sun, 29 Mar 2020 21:24:56 -0700 (PDT) Received: from localhost ([::1]:44702 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jIlyn-0002cx-Mn for importer@patchew.org; Mon, 30 Mar 2020 00:24:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37990) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jIlty-000228-Tp for qemu-devel@nongnu.org; Mon, 30 Mar 2020 00:19:56 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jIltx-0008K1-FS for qemu-devel@nongnu.org; Mon, 30 Mar 2020 00:19:54 -0400 Received: from mga07.intel.com ([134.134.136.100]:12573) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jIltx-0007o2-2x for qemu-devel@nongnu.org; Mon, 30 Mar 2020 00:19:53 -0400 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 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 IronPort-SDR: WN7Zzx4Ag+jz8bWiUs/IFLrgNX7NLuUsuq8nuuzLtvcvOi/BE6PYrT5Od0mbg9smviyL2QeGYD pq08WIuszjyQ== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False IronPort-SDR: dPsQ4FxPl8pOrtzLBeYAm0lXulIKdIkLzDFxbuk0VTSIzzc0BpHDLASu+KpExAdYvZ5thghLzh 8BWKQhn3Hoyw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,322,1580803200"; d="scan'208";a="327632066" From: Liu Yi L To: qemu-devel@nongnu.org, alex.williamson@redhat.com, peterx@redhat.com Subject: [PATCH v2 18/22] vfio: add support for flush iommu stage-1 cache Date: Sun, 29 Mar 2020 21:24:57 -0700 Message-Id: <1585542301-84087-19-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 , 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, 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 adds flush_stage1_cache() definition in HostIOMUContextClass. And adds corresponding implementation in VFIO. This is to expose a way for vIOMMU to flush stage-1 cache in host side since guest owns stage-1 translation structures in dual stage DMA translation configuration. Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Eric Auger Cc: Yi Sun Cc: David Gibson Cc: Alex Williamson Acked-by: Peter Xu Signed-off-by: Liu Yi L --- hw/iommu/host_iommu_context.c | 19 +++++++++++++++++++ hw/vfio/common.c | 25 +++++++++++++++++++++++++ include/hw/iommu/host_iommu_context.h | 14 ++++++++++++++ 3 files changed, 58 insertions(+) diff --git a/hw/iommu/host_iommu_context.c b/hw/iommu/host_iommu_context.c index 8ae20fe..e884752 100644 --- a/hw/iommu/host_iommu_context.c +++ b/hw/iommu/host_iommu_context.c @@ -113,6 +113,25 @@ int host_iommu_ctx_unbind_stage1_pgtbl(HostIOMMUContex= t *iommu_ctx, return hicxc->unbind_stage1_pgtbl(iommu_ctx, data); } =20 +int host_iommu_ctx_flush_stage1_cache(HostIOMMUContext *iommu_ctx, + DualIOMMUStage1Cache *cache) +{ + HostIOMMUContextClass *hicxc; + + hicxc =3D HOST_IOMMU_CONTEXT_GET_CLASS(iommu_ctx); + + if (!hicxc) { + return -EINVAL; + } + + if (!(iommu_ctx->flags & HOST_IOMMU_NESTING) || + !hicxc->flush_stage1_cache) { + return -EINVAL; + } + + return hicxc->flush_stage1_cache(iommu_ctx, cache); +} + void host_iommu_ctx_init(void *_iommu_ctx, size_t instance_size, const char *mrtypename, uint64_t flags, uint32_t formats) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 465e4d8..6b730b6 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1274,6 +1274,30 @@ static int vfio_host_iommu_ctx_unbind_stage1_pgtbl(H= ostIOMMUContext *iommu_ctx, return ret; } =20 +static int vfio_host_iommu_ctx_flush_stage1_cache(HostIOMMUContext *iommu_= ctx, + DualIOMMUStage1Cache *cache) +{ + VFIOContainer *container =3D container_of(iommu_ctx, + VFIOContainer, iommu_ctx); + struct vfio_iommu_type1_cache_invalidate *cache_inv; + unsigned long argsz; + int ret =3D 0; + + argsz =3D sizeof(*cache_inv) + sizeof(cache->cache_info); + cache_inv =3D g_malloc0(argsz); + cache_inv->argsz =3D argsz; + cache_inv->flags =3D 0; + memcpy(&cache_inv->cache_info, &cache->cache_info, + sizeof(cache->cache_info)); + + if (ioctl(container->fd, VFIO_IOMMU_CACHE_INVALIDATE, cache_inv)) { + error_report("%s: iommu cache flush failed: %d", __func__, -errno); + ret =3D -errno; + } + g_free(cache_inv); + return ret; +} + /** * Get iommu info from host. Caller of this funcion should free * the memory pointed by the returned pointer stored in @info @@ -1998,6 +2022,7 @@ static void vfio_host_iommu_context_class_init(Object= Class *klass, hicxc->pasid_free =3D vfio_host_iommu_ctx_pasid_free; hicxc->bind_stage1_pgtbl =3D vfio_host_iommu_ctx_bind_stage1_pgtbl; hicxc->unbind_stage1_pgtbl =3D vfio_host_iommu_ctx_unbind_stage1_pgtbl; + hicxc->flush_stage1_cache =3D vfio_host_iommu_ctx_flush_stage1_cache; } =20 static const TypeInfo vfio_host_iommu_context_info =3D { diff --git a/include/hw/iommu/host_iommu_context.h b/include/hw/iommu/host_= iommu_context.h index 44daca9..69b1b7b 100644 --- a/include/hw/iommu/host_iommu_context.h +++ b/include/hw/iommu/host_iommu_context.h @@ -42,6 +42,7 @@ =20 typedef struct HostIOMMUContext HostIOMMUContext; typedef struct DualIOMMUStage1BindData DualIOMMUStage1BindData; +typedef struct DualIOMMUStage1Cache DualIOMMUStage1Cache; =20 typedef struct HostIOMMUContextClass { /* private */ @@ -65,6 +66,12 @@ typedef struct HostIOMMUContextClass { /* Undo a previous bind. @bind_data specifies the unbind info. */ int (*unbind_stage1_pgtbl)(HostIOMMUContext *iommu_ctx, DualIOMMUStage1BindData *bind_data); + /* + * Propagate stage-1 cache flush to host IOMMU, cache + * info specifid in @cache + */ + int (*flush_stage1_cache)(HostIOMMUContext *iommu_ctx, + DualIOMMUStage1Cache *cache); } HostIOMMUContextClass; =20 /* @@ -86,6 +93,11 @@ struct DualIOMMUStage1BindData { } bind_data; }; =20 +struct DualIOMMUStage1Cache { + uint32_t pasid; + struct iommu_cache_invalidate_info cache_info; +}; + int host_iommu_ctx_pasid_alloc(HostIOMMUContext *iommu_ctx, uint32_t min, uint32_t max, uint32_t *pasid); int host_iommu_ctx_pasid_free(HostIOMMUContext *iommu_ctx, uint32_t pasid); @@ -93,6 +105,8 @@ int host_iommu_ctx_bind_stage1_pgtbl(HostIOMMUContext *i= ommu_ctx, DualIOMMUStage1BindData *data); int host_iommu_ctx_unbind_stage1_pgtbl(HostIOMMUContext *iommu_ctx, DualIOMMUStage1BindData *data); +int host_iommu_ctx_flush_stage1_cache(HostIOMMUContext *iommu_ctx, + DualIOMMUStage1Cache *cache); =20 void host_iommu_ctx_init(void *_iommu_ctx, size_t instance_size, const char *mrtypename, --=20 2.7.4