From patchwork Sat Feb 22 08:07:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 11397849 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 685921921 for ; Sat, 22 Feb 2020 08:02:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 51E0E208C3 for ; Sat, 22 Feb 2020 08:02:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727201AbgBVICC (ORCPT ); Sat, 22 Feb 2020 03:02:02 -0500 Received: from mga05.intel.com ([192.55.52.43]:63018 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727164AbgBVICB (ORCPT ); Sat, 22 Feb 2020 03:02:01 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga105.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Feb 2020 00:01:58 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,471,1574150400"; d="scan'208";a="240547704" Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga006.jf.intel.com with ESMTP; 22 Feb 2020 00:01:57 -0800 From: Liu Yi L To: qemu-devel@nongnu.org, alex.williamson@redhat.com, peterx@redhat.com Cc: pbonzini@redhat.com, mst@redhat.com, eric.auger@redhat.com, david@gibson.dropbear.id.au, kevin.tian@intel.com, yi.l.liu@intel.com, jun.j.tian@intel.com, yi.y.sun@intel.com, kvm@vger.kernel.org, Jacob Pan , Yi Sun Subject: [RFC v3.1 18/22] vfio/common: add support for flush iommu stage-1 cache Date: Sat, 22 Feb 2020 00:07:19 -0800 Message-Id: <1582358843-51931-19-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1582358843-51931-1-git-send-email-yi.l.liu@intel.com> References: <1582358843-51931-1-git-send-email-yi.l.liu@intel.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org This patch adds flush_stage1_cache() definition in HostIOMMUOps. 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. Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Eric Auger Cc: Yi Sun Cc: David Gibson Cc: Alex Williamson Signed-off-by: Liu Yi L --- hw/iommu/host_iommu_context.c | 10 ++++++++++ hw/vfio/common.c | 24 ++++++++++++++++++++++++ include/hw/iommu/host_iommu_context.h | 14 ++++++++++++++ 3 files changed, 48 insertions(+) diff --git a/hw/iommu/host_iommu_context.c b/hw/iommu/host_iommu_context.c index 5f7eb92..90be684 100644 --- a/hw/iommu/host_iommu_context.c +++ b/hw/iommu/host_iommu_context.c @@ -61,6 +61,16 @@ int host_iommu_ctx_unbind_stage1_pgtbl(HostIOMMUContext *host_icx, return -ENOENT; } +int host_iommu_ctx_flush_stage1_cache(HostIOMMUContext *host_icx, + DualIOMMUStage1Cache *cache) +{ + if (host_icx && (host_icx->flags & HOST_IOMMU_NESTING) && + host_icx && host_icx->ops && host_icx->ops->flush_stage1_cache) { + return host_icx->ops->flush_stage1_cache(host_icx, cache); + } + return -ENOENT; +} + void host_iommu_ctx_init(HostIOMMUContext *host_icx, uint64_t flags, HostIOMMUOps *ops, HostIOMMUInfo *uinfo) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index b560fdb..305796b 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -1269,11 +1269,35 @@ static int vfio_host_icx_unbind_stage1_pgtbl(HostIOMMUContext *host_icx, return ret; } +static int vfio_host_iommu_ctx_flush_stage1_cache(HostIOMMUContext *host_icx, + DualIOMMUStage1Cache *cache) +{ + VFIOContainer *container = container_of(host_icx, VFIOContainer, host_icx); + struct vfio_iommu_type1_cache_invalidate *cache_inv; + unsigned long argsz; + int ret = 0; + + argsz = sizeof(*cache_inv) + sizeof(cache->cache_info); + cache_inv = g_malloc0(argsz); + cache_inv->argsz = argsz; + cache_inv->flags = 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 = -errno; + } + g_free(cache_inv); + return ret; +} + static struct HostIOMMUOps vfio_host_icx_ops = { .pasid_alloc = vfio_host_icx_pasid_alloc, .pasid_free = vfio_host_icx_pasid_free, .bind_stage1_pgtbl = vfio_host_icx_bind_stage1_pgtbl, .unbind_stage1_pgtbl = vfio_host_icx_unbind_stage1_pgtbl, + .flush_stage1_cache = vfio_host_iommu_ctx_flush_stage1_cache, }; /** diff --git a/include/hw/iommu/host_iommu_context.h b/include/hw/iommu/host_iommu_context.h index 660fab8..a55d49a 100644 --- a/include/hw/iommu/host_iommu_context.h +++ b/include/hw/iommu/host_iommu_context.h @@ -32,6 +32,7 @@ typedef struct HostIOMMUContext HostIOMMUContext; typedef struct HostIOMMUOps HostIOMMUOps; typedef struct HostIOMMUInfo HostIOMMUInfo; typedef struct DualIOMMUStage1BindData DualIOMMUStage1BindData; +typedef struct DualIOMMUStage1Cache DualIOMMUStage1Cache; struct HostIOMMUOps { /* Allocate pasid from HostIOMMUContext (a.k.a. host software) */ @@ -52,6 +53,12 @@ struct HostIOMMUOps { /* Undo a previous bind. @bind_data specifies the unbind info. */ int (*unbind_stage1_pgtbl)(HostIOMMUContext *dsi_obj, DualIOMMUStage1BindData *bind_data); + /* + * Propagate stage-1 cache flush to host IOMMU, cache + * info specifid in @cache + */ + int (*flush_stage1_cache)(HostIOMMUContext *host_icx, + DualIOMMUStage1Cache *cache); }; struct HostIOMMUInfo { @@ -76,6 +83,11 @@ struct DualIOMMUStage1BindData { } bind_data; }; +struct DualIOMMUStage1Cache { + uint32_t pasid; + struct iommu_cache_invalidate_info cache_info; +}; + int host_iommu_ctx_pasid_alloc(HostIOMMUContext *host_icx, uint32_t min, uint32_t max, uint32_t *pasid); int host_iommu_ctx_pasid_free(HostIOMMUContext *host_icx, uint32_t pasid); @@ -83,6 +95,8 @@ int host_iommu_ctx_bind_stage1_pgtbl(HostIOMMUContext *host_icx, DualIOMMUStage1BindData *data); int host_iommu_ctx_unbind_stage1_pgtbl(HostIOMMUContext *host_icx, DualIOMMUStage1BindData *data); +int host_iommu_ctx_flush_stage1_cache(HostIOMMUContext *host_icx, + DualIOMMUStage1Cache *cache); void host_iommu_ctx_init(HostIOMMUContext *host_icx, uint64_t flags, HostIOMMUOps *ops,