From: "Thomas Hellström (VMware)" <thomas_os@shipmail.org> To: dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, linux-graphics-maintainer@vmware.com, Thomas Hellstrom <thellstrom@vmware.com>, Brian Paul <brianp@vmware.com> Subject: [PATCH 2/2] drm/vmwgfx: Refuse DMA operation when SEV encryption is active Date: Wed, 11 Mar 2020 18:08:39 +0100 [thread overview] Message-ID: <20200311170839.3617-2-thomas_os@shipmail.org> (raw) In-Reply-To: <20200311170839.3617-1-thomas_os@shipmail.org> From: Thomas Hellstrom <thellstrom@vmware.com> TTM doesn't yet fully support mapping of DMA memory when SEV is active, so in that case, refuse DMA operation. For guest-backed object operation this means 3D acceleration will be disabled. For host-backed, VRAM will be used for data transfer between the guest and the device. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> --- drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c index f2ec3155468d..4f58364421ce 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c @@ -29,6 +29,7 @@ #include <linux/dma-mapping.h> #include <linux/module.h> #include <linux/pci.h> +#include <linux/mem_encrypt.h> #include <drm/drm_drv.h> #include <drm/drm_ioctl.h> @@ -575,6 +576,10 @@ static int vmw_dma_select_mode(struct vmw_private *dev_priv) [vmw_dma_map_populate] = "Caching DMA mappings.", [vmw_dma_map_bind] = "Giving up DMA mappings early."}; + /* TTM currently doesn't fully support SEV encryption. */ + if (mem_encrypt_active()) + return -EINVAL; + if (vmw_force_coherent) dev_priv->map_mode = vmw_dma_alloc_coherent; else if (vmw_restrict_iommu) -- 2.21.1
WARNING: multiple messages have this Message-ID (diff)
From: "Thomas Hellström (VMware)" <thomas_os@shipmail.org> To: dri-devel@lists.freedesktop.org Cc: Brian Paul <brianp@vmware.com>, Thomas Hellstrom <thellstrom@vmware.com>, linux-graphics-maintainer@vmware.com, linux-kernel@vger.kernel.org Subject: [PATCH 2/2] drm/vmwgfx: Refuse DMA operation when SEV encryption is active Date: Wed, 11 Mar 2020 18:08:39 +0100 [thread overview] Message-ID: <20200311170839.3617-2-thomas_os@shipmail.org> (raw) In-Reply-To: <20200311170839.3617-1-thomas_os@shipmail.org> From: Thomas Hellstrom <thellstrom@vmware.com> TTM doesn't yet fully support mapping of DMA memory when SEV is active, so in that case, refuse DMA operation. For guest-backed object operation this means 3D acceleration will be disabled. For host-backed, VRAM will be used for data transfer between the guest and the device. Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Brian Paul <brianp@vmware.com> --- drivers/gpu/drm/vmwgfx/vmwgfx_drv.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c index f2ec3155468d..4f58364421ce 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_drv.c @@ -29,6 +29,7 @@ #include <linux/dma-mapping.h> #include <linux/module.h> #include <linux/pci.h> +#include <linux/mem_encrypt.h> #include <drm/drm_drv.h> #include <drm/drm_ioctl.h> @@ -575,6 +576,10 @@ static int vmw_dma_select_mode(struct vmw_private *dev_priv) [vmw_dma_map_populate] = "Caching DMA mappings.", [vmw_dma_map_bind] = "Giving up DMA mappings early."}; + /* TTM currently doesn't fully support SEV encryption. */ + if (mem_encrypt_active()) + return -EINVAL; + if (vmw_force_coherent) dev_priv->map_mode = vmw_dma_alloc_coherent; else if (vmw_restrict_iommu) -- 2.21.1 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2020-03-11 17:09 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-03-11 17:08 [PATCH 1/2] drm/vmwgfx: Fix the refuse_dma mode when using guest-backed objects Thomas Hellström (VMware) 2020-03-11 17:08 ` Thomas Hellström (VMware) 2020-03-11 17:08 ` Thomas Hellström (VMware) [this message] 2020-03-11 17:08 ` [PATCH 2/2] drm/vmwgfx: Refuse DMA operation when SEV encryption is active Thomas Hellström (VMware)
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