From c8fb436b3b633183a4c2b5a958c01baaf8bc42a7 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Mon, 19 Aug 2019 15:22:56 +0200 Subject: Documentation: Update Documentation for iommu.passthrough This kernel parameter now takes also effect on X86. Signed-off-by: Joerg Roedel --- Documentation/admin-guide/kernel-parameters.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'Documentation') diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 7ccd158b3894..0c59398519be 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1811,7 +1811,7 @@ synchronously. iommu.passthrough= - [ARM64] Configure DMA to bypass the IOMMU by default. + [ARM64, X86] Configure DMA to bypass the IOMMU by default. Format: { "0" | "1" } 0 - Use IOMMU translation for DMA. 1 - Bypass the IOMMU for DMA. -- cgit v1.2.3 From 29746d012588f1de8517fc6921683c3844120989 Mon Sep 17 00:00:00 2001 From: Yong Wu Date: Sat, 24 Aug 2019 11:01:46 +0800 Subject: dt-bindings: mediatek: Add binding for mt8183 IOMMU and SMI This patch adds decriptions for mt8183 IOMMU and SMI. mt8183 has only one M4U like mt8173 and is also MTK IOMMU gen2 which uses ARM Short-Descriptor translation table format. The mt8183 M4U-SMI HW diagram is as below: EMI | M4U | ---------- | | gals0-rx gals1-rx | | | | gals0-tx gals1-tx | | ------------ SMI Common ------------ | +-----+-----+--------+-----+-----+-------+-------+ | | | | | | | | | | gals-rx gals-rx | gals-rx gals-rx gals-rx | | | | | | | | | | | | | | | | | | gals-tx gals-tx | gals-tx gals-tx gals-tx | | | | | | | | larb0 larb1 IPU0 IPU1 larb4 larb5 larb6 CCU disp vdec img cam venc img cam All the connections are HW fixed, SW can NOT adjust it. Compared with mt8173, we add a GALS(Global Async Local Sync) module between SMI-common and M4U, and additional GALS between larb2/3/5/6 and SMI-common. GALS can help synchronize for the modules in different clock frequency, it can be seen as a "asynchronous fifo". GALS can only help transfer the command/data while it doesn't have the configuring register, thus it has the special "smi" clock and it doesn't have the "apb" clock. From the diagram above, we add "gals0" and "gals1" clocks for smi-common and add a "gals" clock for smi-larb. >From the diagram above, IPU0/IPU1(Image Processor Unit) and CCU(Camera Control Unit) is connected with smi-common directly, we can take them as "larb2", "larb3" and "larb7", and their register spaces are different with the normal larb. Signed-off-by: Yong Wu Reviewed-by: Rob Herring Reviewed-by: Evan Green Signed-off-by: Joerg Roedel --- .../devicetree/bindings/iommu/mediatek,iommu.txt | 30 ++++- .../memory-controllers/mediatek,smi-common.txt | 12 +- .../memory-controllers/mediatek,smi-larb.txt | 4 + include/dt-bindings/memory/mt8183-larb-port.h | 130 +++++++++++++++++++++ 4 files changed, 170 insertions(+), 6 deletions(-) create mode 100644 include/dt-bindings/memory/mt8183-larb-port.h (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt b/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt index 6922db598def..ce59a505f5a4 100644 --- a/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt +++ b/Documentation/devicetree/bindings/iommu/mediatek,iommu.txt @@ -11,10 +11,23 @@ ARM Short-Descriptor translation table format for address translation. | m4u (Multimedia Memory Management Unit) | + +--------+ + | | + gals0-rx gals1-rx (Global Async Local Sync rx) + | | + | | + gals0-tx gals1-tx (Global Async Local Sync tx) + | | Some SoCs may have GALS. + +--------+ + | SMI Common(Smart Multimedia Interface Common) | +----------------+------- | | + | gals-rx There may be GALS in some larbs. + | | + | | + | gals-tx | | SMI larb0 SMI larb1 ... SoCs have several SMI local arbiter(larb). (display) (vdec) @@ -36,6 +49,10 @@ each local arbiter. like display, video decode, and camera. And there are different ports in each larb. Take a example, There are many ports like MC, PP, VLD in the video decode local arbiter, all these ports are according to the video HW. + In some SoCs, there may be a GALS(Global Async Local Sync) module between +smi-common and m4u, and additional GALS module between smi-larb and +smi-common. GALS can been seen as a "asynchronous fifo" which could help +synchronize for the modules in different clock frequency. Required properties: - compatible : must be one of the following string: @@ -44,18 +61,25 @@ Required properties: "mediatek,mt7623-m4u", "mediatek,mt2701-m4u" for mt7623 which uses generation one m4u HW. "mediatek,mt8173-m4u" for mt8173 which uses generation two m4u HW. + "mediatek,mt8183-m4u" for mt8183 which uses generation two m4u HW. - reg : m4u register base and size. - interrupts : the interrupt of m4u. - clocks : must contain one entry for each clock-names. -- clock-names : must be "bclk", It is the block clock of m4u. +- clock-names : Only 1 optional clock: + - "bclk": the block clock of m4u. + Here is the list which require this "bclk": + - mt2701, mt2712, mt7623 and mt8173. + Note that m4u use the EMI clock which always has been enabled before kernel + if there is no this "bclk". - mediatek,larbs : List of phandle to the local arbiters in the current Socs. Refer to bindings/memory-controllers/mediatek,smi-larb.txt. It must sort according to the local arbiter index, like larb0, larb1, larb2... - iommu-cells : must be 1. This is the mtk_m4u_id according to the HW. Specifies the mtk_m4u_id as defined in dt-binding/memory/mt2701-larb-port.h for mt2701, mt7623 - dt-binding/memory/mt2712-larb-port.h for mt2712, and - dt-binding/memory/mt8173-larb-port.h for mt8173. + dt-binding/memory/mt2712-larb-port.h for mt2712, + dt-binding/memory/mt8173-larb-port.h for mt8173, and + dt-binding/memory/mt8183-larb-port.h for mt8183. Example: iommu: iommu@10205000 { diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt index e937ddd871a6..b478ade4da65 100644 --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.txt @@ -2,9 +2,10 @@ SMI (Smart Multimedia Interface) Common The hardware block diagram please check bindings/iommu/mediatek,iommu.txt -Mediatek SMI have two generations of HW architecture, mt2712 and mt8173 use -the second generation of SMI HW while mt2701 uses the first generation HW of -SMI. +Mediatek SMI have two generations of HW architecture, here is the list +which generation the SoCs use: +generation 1: mt2701 and mt7623. +generation 2: mt2712, mt8173 and mt8183. There's slight differences between the two SMI, for generation 2, the register which control the iommu port is at each larb's register base. But @@ -19,6 +20,7 @@ Required properties: "mediatek,mt2712-smi-common" "mediatek,mt7623-smi-common", "mediatek,mt2701-smi-common" "mediatek,mt8173-smi-common" + "mediatek,mt8183-smi-common" - reg : the register and size of the SMI block. - power-domains : a phandle to the power domain of this local arbiter. - clocks : Must contain an entry for each entry in clock-names. @@ -30,6 +32,10 @@ Required properties: They may be the same if both source clocks are the same. - "async" : asynchronous clock, it help transform the smi clock into the emi clock domain, this clock is only needed by generation 1 smi HW. + and these 2 option clocks for generation 2 smi HW: + - "gals0": the path0 clock of GALS(Global Async Local Sync). + - "gals1": the path1 clock of GALS(Global Async Local Sync). + Here is the list which has this GALS: mt8183. Example: smi_common: smi@14022000 { diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt index 94eddcae77ab..4b369b3e1a69 100644 --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt @@ -8,6 +8,7 @@ Required properties: "mediatek,mt2712-smi-larb" "mediatek,mt7623-smi-larb", "mediatek,mt2701-smi-larb" "mediatek,mt8173-smi-larb" + "mediatek,mt8183-smi-larb" - reg : the register and size of this local arbiter. - mediatek,smi : a phandle to the smi_common node. - power-domains : a phandle to the power domain of this local arbiter. @@ -16,6 +17,9 @@ Required properties: - "apb" : Advanced Peripheral Bus clock, It's the clock for setting the register. - "smi" : It's the clock for transfer data and command. + and this optional clock name: + - "gals": the clock for GALS(Global Async Local Sync). + Here is the list which has this GALS: mt8183. Required property for mt2701, mt2712 and mt7623: - mediatek,larb-id :the hardware id of this larb. diff --git a/include/dt-bindings/memory/mt8183-larb-port.h b/include/dt-bindings/memory/mt8183-larb-port.h new file mode 100644 index 000000000000..2c579f305162 --- /dev/null +++ b/include/dt-bindings/memory/mt8183-larb-port.h @@ -0,0 +1,130 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2018 MediaTek Inc. + * Author: Yong Wu + */ +#ifndef __DTS_IOMMU_PORT_MT8183_H +#define __DTS_IOMMU_PORT_MT8183_H + +#define MTK_M4U_ID(larb, port) (((larb) << 5) | (port)) + +#define M4U_LARB0_ID 0 +#define M4U_LARB1_ID 1 +#define M4U_LARB2_ID 2 +#define M4U_LARB3_ID 3 +#define M4U_LARB4_ID 4 +#define M4U_LARB5_ID 5 +#define M4U_LARB6_ID 6 +#define M4U_LARB7_ID 7 + +/* larb0 */ +#define M4U_PORT_DISP_OVL0 MTK_M4U_ID(M4U_LARB0_ID, 0) +#define M4U_PORT_DISP_2L_OVL0_LARB0 MTK_M4U_ID(M4U_LARB0_ID, 1) +#define M4U_PORT_DISP_2L_OVL1_LARB0 MTK_M4U_ID(M4U_LARB0_ID, 2) +#define M4U_PORT_DISP_RDMA0 MTK_M4U_ID(M4U_LARB0_ID, 3) +#define M4U_PORT_DISP_RDMA1 MTK_M4U_ID(M4U_LARB0_ID, 4) +#define M4U_PORT_DISP_WDMA0 MTK_M4U_ID(M4U_LARB0_ID, 5) +#define M4U_PORT_MDP_RDMA0 MTK_M4U_ID(M4U_LARB0_ID, 6) +#define M4U_PORT_MDP_WROT0 MTK_M4U_ID(M4U_LARB0_ID, 7) +#define M4U_PORT_MDP_WDMA0 MTK_M4U_ID(M4U_LARB0_ID, 8) +#define M4U_PORT_DISP_FAKE0 MTK_M4U_ID(M4U_LARB0_ID, 9) + +/* larb1 */ +#define M4U_PORT_HW_VDEC_MC_EXT MTK_M4U_ID(M4U_LARB1_ID, 0) +#define M4U_PORT_HW_VDEC_PP_EXT MTK_M4U_ID(M4U_LARB1_ID, 1) +#define M4U_PORT_HW_VDEC_VLD_EXT MTK_M4U_ID(M4U_LARB1_ID, 2) +#define M4U_PORT_HW_VDEC_AVC_MV_EXT MTK_M4U_ID(M4U_LARB1_ID, 3) +#define M4U_PORT_HW_VDEC_PRED_RD_EXT MTK_M4U_ID(M4U_LARB1_ID, 4) +#define M4U_PORT_HW_VDEC_PRED_WR_EXT MTK_M4U_ID(M4U_LARB1_ID, 5) +#define M4U_PORT_HW_VDEC_PPWRAP_EXT MTK_M4U_ID(M4U_LARB1_ID, 6) + +/* larb2 VPU0 */ +#define M4U_PORT_IMG_IPUO MTK_M4U_ID(M4U_LARB2_ID, 0) +#define M4U_PORT_IMG_IPU3O MTK_M4U_ID(M4U_LARB2_ID, 1) +#define M4U_PORT_IMG_IPUI MTK_M4U_ID(M4U_LARB2_ID, 2) + +/* larb3 VPU1 */ +#define M4U_PORT_CAM_IPUO MTK_M4U_ID(M4U_LARB3_ID, 0) +#define M4U_PORT_CAM_IPU2O MTK_M4U_ID(M4U_LARB3_ID, 1) +#define M4U_PORT_CAM_IPU3O MTK_M4U_ID(M4U_LARB3_ID, 2) +#define M4U_PORT_CAM_IPUI MTK_M4U_ID(M4U_LARB3_ID, 3) +#define M4U_PORT_CAM_IPU2I MTK_M4U_ID(M4U_LARB3_ID, 4) + +/* larb4 */ +#define M4U_PORT_VENC_RCPU MTK_M4U_ID(M4U_LARB4_ID, 0) +#define M4U_PORT_VENC_REC MTK_M4U_ID(M4U_LARB4_ID, 1) +#define M4U_PORT_VENC_BSDMA MTK_M4U_ID(M4U_LARB4_ID, 2) +#define M4U_PORT_VENC_SV_COMV MTK_M4U_ID(M4U_LARB4_ID, 3) +#define M4U_PORT_VENC_RD_COMV MTK_M4U_ID(M4U_LARB4_ID, 4) +#define M4U_PORT_JPGENC_RDMA MTK_M4U_ID(M4U_LARB4_ID, 5) +#define M4U_PORT_JPGENC_BSDMA MTK_M4U_ID(M4U_LARB4_ID, 6) +#define M4U_PORT_VENC_CUR_LUMA MTK_M4U_ID(M4U_LARB4_ID, 7) +#define M4U_PORT_VENC_CUR_CHROMA MTK_M4U_ID(M4U_LARB4_ID, 8) +#define M4U_PORT_VENC_REF_LUMA MTK_M4U_ID(M4U_LARB4_ID, 9) +#define M4U_PORT_VENC_REF_CHROMA MTK_M4U_ID(M4U_LARB4_ID, 10) + +/* larb5 */ +#define M4U_PORT_CAM_IMGI MTK_M4U_ID(M4U_LARB5_ID, 0) +#define M4U_PORT_CAM_IMG2O MTK_M4U_ID(M4U_LARB5_ID, 1) +#define M4U_PORT_CAM_IMG3O MTK_M4U_ID(M4U_LARB5_ID, 2) +#define M4U_PORT_CAM_VIPI MTK_M4U_ID(M4U_LARB5_ID, 3) +#define M4U_PORT_CAM_LCEI MTK_M4U_ID(M4U_LARB5_ID, 4) +#define M4U_PORT_CAM_SMXI MTK_M4U_ID(M4U_LARB5_ID, 5) +#define M4U_PORT_CAM_SMXO MTK_M4U_ID(M4U_LARB5_ID, 6) +#define M4U_PORT_CAM_WPE0_RDMA1 MTK_M4U_ID(M4U_LARB5_ID, 7) +#define M4U_PORT_CAM_WPE0_RDMA0 MTK_M4U_ID(M4U_LARB5_ID, 8) +#define M4U_PORT_CAM_WPE0_WDMA MTK_M4U_ID(M4U_LARB5_ID, 9) +#define M4U_PORT_CAM_FDVT_RP MTK_M4U_ID(M4U_LARB5_ID, 10) +#define M4U_PORT_CAM_FDVT_WR MTK_M4U_ID(M4U_LARB5_ID, 11) +#define M4U_PORT_CAM_FDVT_RB MTK_M4U_ID(M4U_LARB5_ID, 12) +#define M4U_PORT_CAM_WPE1_RDMA0 MTK_M4U_ID(M4U_LARB5_ID, 13) +#define M4U_PORT_CAM_WPE1_RDMA1 MTK_M4U_ID(M4U_LARB5_ID, 14) +#define M4U_PORT_CAM_WPE1_WDMA MTK_M4U_ID(M4U_LARB5_ID, 15) +#define M4U_PORT_CAM_DPE_RDMA MTK_M4U_ID(M4U_LARB5_ID, 16) +#define M4U_PORT_CAM_DPE_WDMA MTK_M4U_ID(M4U_LARB5_ID, 17) +#define M4U_PORT_CAM_MFB_RDMA0 MTK_M4U_ID(M4U_LARB5_ID, 18) +#define M4U_PORT_CAM_MFB_RDMA1 MTK_M4U_ID(M4U_LARB5_ID, 19) +#define M4U_PORT_CAM_MFB_WDMA MTK_M4U_ID(M4U_LARB5_ID, 20) +#define M4U_PORT_CAM_RSC_RDMA0 MTK_M4U_ID(M4U_LARB5_ID, 21) +#define M4U_PORT_CAM_RSC_WDMA MTK_M4U_ID(M4U_LARB5_ID, 22) +#define M4U_PORT_CAM_OWE_RDMA MTK_M4U_ID(M4U_LARB5_ID, 23) +#define M4U_PORT_CAM_OWE_WDMA MTK_M4U_ID(M4U_LARB5_ID, 24) + +/* larb6 */ +#define M4U_PORT_CAM_IMGO MTK_M4U_ID(M4U_LARB6_ID, 0) +#define M4U_PORT_CAM_RRZO MTK_M4U_ID(M4U_LARB6_ID, 1) +#define M4U_PORT_CAM_AAO MTK_M4U_ID(M4U_LARB6_ID, 2) +#define M4U_PORT_CAM_AFO MTK_M4U_ID(M4U_LARB6_ID, 3) +#define M4U_PORT_CAM_LSCI0 MTK_M4U_ID(M4U_LARB6_ID, 4) +#define M4U_PORT_CAM_LSCI1 MTK_M4U_ID(M4U_LARB6_ID, 5) +#define M4U_PORT_CAM_PDO MTK_M4U_ID(M4U_LARB6_ID, 6) +#define M4U_PORT_CAM_BPCI MTK_M4U_ID(M4U_LARB6_ID, 7) +#define M4U_PORT_CAM_LCSO MTK_M4U_ID(M4U_LARB6_ID, 8) +#define M4U_PORT_CAM_CAM_RSSO_A MTK_M4U_ID(M4U_LARB6_ID, 9) +#define M4U_PORT_CAM_UFEO MTK_M4U_ID(M4U_LARB6_ID, 10) +#define M4U_PORT_CAM_SOCO MTK_M4U_ID(M4U_LARB6_ID, 11) +#define M4U_PORT_CAM_SOC1 MTK_M4U_ID(M4U_LARB6_ID, 12) +#define M4U_PORT_CAM_SOC2 MTK_M4U_ID(M4U_LARB6_ID, 13) +#define M4U_PORT_CAM_CCUI MTK_M4U_ID(M4U_LARB6_ID, 14) +#define M4U_PORT_CAM_CCUO MTK_M4U_ID(M4U_LARB6_ID, 15) +#define M4U_PORT_CAM_RAWI_A MTK_M4U_ID(M4U_LARB6_ID, 16) +#define M4U_PORT_CAM_CCUG MTK_M4U_ID(M4U_LARB6_ID, 17) +#define M4U_PORT_CAM_PSO MTK_M4U_ID(M4U_LARB6_ID, 18) +#define M4U_PORT_CAM_AFO_1 MTK_M4U_ID(M4U_LARB6_ID, 19) +#define M4U_PORT_CAM_LSCI_2 MTK_M4U_ID(M4U_LARB6_ID, 20) +#define M4U_PORT_CAM_PDI MTK_M4U_ID(M4U_LARB6_ID, 21) +#define M4U_PORT_CAM_FLKO MTK_M4U_ID(M4U_LARB6_ID, 22) +#define M4U_PORT_CAM_LMVO MTK_M4U_ID(M4U_LARB6_ID, 23) +#define M4U_PORT_CAM_UFGO MTK_M4U_ID(M4U_LARB6_ID, 24) +#define M4U_PORT_CAM_SPARE MTK_M4U_ID(M4U_LARB6_ID, 25) +#define M4U_PORT_CAM_SPARE_2 MTK_M4U_ID(M4U_LARB6_ID, 26) +#define M4U_PORT_CAM_SPARE_3 MTK_M4U_ID(M4U_LARB6_ID, 27) +#define M4U_PORT_CAM_SPARE_4 MTK_M4U_ID(M4U_LARB6_ID, 28) +#define M4U_PORT_CAM_SPARE_5 MTK_M4U_ID(M4U_LARB6_ID, 29) +#define M4U_PORT_CAM_SPARE_6 MTK_M4U_ID(M4U_LARB6_ID, 30) + +/* CCU */ +#define M4U_PORT_CCU0 MTK_M4U_ID(M4U_LARB7_ID, 0) +#define M4U_PORT_CCU1 MTK_M4U_ID(M4U_LARB7_ID, 1) + +#endif -- cgit v1.2.3 From e5e04d051979dbd636a99099b7a595093c50a4bc Mon Sep 17 00:00:00 2001 From: Lu Baolu Date: Fri, 6 Sep 2019 14:14:49 +0800 Subject: iommu/vt-d: Check whether device requires bounce buffer This adds a helper to check whether a device needs to use bounce buffer. It also provides a boot time option to disable the bounce buffer. Users can use this to prevent the iommu driver from using the bounce buffer for performance gain. Cc: Ashok Raj Cc: Jacob Pan Cc: Kevin Tian Signed-off-by: Lu Baolu Tested-by: Xu Pengfei Tested-by: Mika Westerberg Signed-off-by: Joerg Roedel --- Documentation/admin-guide/kernel-parameters.txt | 5 +++++ drivers/iommu/intel-iommu.c | 7 +++++++ 2 files changed, 12 insertions(+) (limited to 'Documentation') diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 47d981a86e2f..aaca73080097 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -1732,6 +1732,11 @@ Note that using this option lowers the security provided by tboot because it makes the system vulnerable to DMA attacks. + nobounce [Default off] + Disable bounce buffer for unstrusted devices such as + the Thunderbolt devices. This will treat the untrusted + devices as the trusted ones, hence might expose security + risks of DMA attacks. intel_idle.max_cstate= [KNL,HW,ACPI,X86] 0 disables intel_idle and fall back on acpi_idle. diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 12d094d08c0a..ce6baabc9dcc 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -360,6 +360,7 @@ static int dmar_forcedac; static int intel_iommu_strict; static int intel_iommu_superpage = 1; static int iommu_identity_mapping; +static int intel_no_bounce; #define IDENTMAP_ALL 1 #define IDENTMAP_GFX 2 @@ -373,6 +374,9 @@ EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped); static DEFINE_SPINLOCK(device_domain_lock); static LIST_HEAD(device_domain_list); +#define device_needs_bounce(d) (!intel_no_bounce && dev_is_pci(d) && \ + to_pci_dev(d)->untrusted) + /* * Iterate over elements in device_domain_list and call the specified * callback @fn against each element. @@ -455,6 +459,9 @@ static int __init intel_iommu_setup(char *str) printk(KERN_INFO "Intel-IOMMU: not forcing on after tboot. This could expose security risk for tboot\n"); intel_iommu_tboot_noforce = 1; + } else if (!strncmp(str, "nobounce", 8)) { + pr_info("Intel-IOMMU: No bounce buffer. This could expose security risks of DMA attacks\n"); + intel_no_bounce = 1; } str += strcspn(str, ","); -- cgit v1.2.3