[PATCH v2] iommu/arm-smmu: Break insecure users by disabling bypass by default

. Suggested-by: Robin Murphy Signed-off-by: Douglas Anderson --- Changes in v2: - Flipped default to 'yes' and changed comments a lot. drivers/iommu/Kconfig| 25 + drivers/iommu/arm-smmu.c | 3 ++- 2 files changed, 27 insertions(+), 1 deletion(-) diff --git a/drivers

[PATCH] iommu/arm-smmu: Allow disabling bypass via kernel config

the existing ability to adjust the configuration via kernel command line. Signed-off-by: Douglas Anderson --- drivers/iommu/Kconfig| 22 ++ drivers/iommu/arm-smmu.c | 3 ++- 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/Kconfig b/drivers/iommu

[PATCH] iommu: Properly pass gfp_t in _iommu_map() to avoid atomic sleeping

Move iotlb_sync_map out from __iommu_map") Signed-off-by: Douglas Anderson --- I haven't done any serious testing on this. I saw a report of the warning and the fix seemed obvious so I'm shooting it out. drivers/iommu/iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/dri

[PATCH 0/6] iommu: Enable devices to request non-strict DMA, starting with QCom SD/MMC

ds up being landable, it will undoubtedly need coordination between many maintainers to land. I believe it's fully bisectable but later patches in the series definitely depend on earlier ones. Sorry for the long CC list. :( Douglas Anderson (6): drivers: base: Add the concept of "pre_pr

[PATCH 1/6] drivers: base: Add the concept of "pre_probe" to drivers

ot;struct platform_device *" that most platform devices get passed to their probe). Presumably this won't cause trouble and it's a lot less code to write but if we need to make it more symmetric that's also possible by touching more files. Signed-off-by: Douglas Anderson --- drivers/base/dd.c

[PATCH 2/6] drivers: base: Add bits to struct device to control iommu strictness

fields can be filled in by the bus code like in the patch ("PCI: Indicate that we want to force strict DMA for untrusted devices") or by using the new pre_probe concept introduced in the patch ("drivers: base: Add the concept of "pre_probe" to drivers"). Signed-off-by:

[PATCH 3/6] PCI: Indicate that we want to force strict DMA for untrusted devices

dd more booleans into the "struct device") so we can fully eliminate the need for the IOMMU framework to reach into a PCIe device. Signed-off-by: Douglas Anderson --- drivers/pci/probe.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/pci/probe.c b/dr

[PATCH 4/6] iommu: Combine device strictness requests with the global default

mdline "iommu.strict=1" or a call to iommu_set_dma_strict(true). Signed-off-by: Douglas Anderson --- drivers/iommu/iommu.c | 56 +-- include/linux/iommu.h | 2 ++ 2 files changed, 45 insertions(+), 13 deletions(-) diff --git a/drivers/iommu/i

[PATCH 5/6] iommu: Stop reaching into PCIe devices to decide strict vs. non-strict

nly handles removing the one related to iommu.strict. Removing the other cases is left as an exercise to the reader. Signed-off-by: Douglas Anderson --- drivers/iommu/dma-iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/dma-iommu.c b/drivers/iom

[PATCH 6/6] mmc: sdhci-msm: Request non-strict IOMMU mode

nice advantage of using the pre_probe() to set this. [1] https://lore.kernel.org/r/20210618040639.3113489-1-j...@joelfernandes.org [2] https://lore.kernel.org/r/1623850736-389584-1-git-send-email-quic_c_gdj...@quicinc.com/ [3] https://lore.kernel.org/r/cover.1623981933.git.saiprakash.ran..

[PATCH v2 2/3] iommu/arm-smmu: Check for strictness after calling impl->init_context()

Implementations should be able to affect the strictness so reorder a little bit so we call them before we look at the strictness. Signed-off-by: Douglas Anderson --- Changes in v2: - Patch moving check for strictness in arm-smmu new for v2. drivers/iommu/arm/arm-smmu/arm-smmu.c | 6 +++--- 1

[PATCH v2 3/3] mmc: sdhci-msm: Request non-strict IOMMU mode

ernel.org/r/20210618040639.3113489-1-j...@joelfernandes.org [2] https://lore.kernel.org/r/1623850736-389584-1-git-send-email-quic_c_gdj...@quicinc.com/ [3] https://lore.kernel.org/r/cover.1623981933.git.saiprakash.ran...@codeaurora.org/ [4] https://lore.kernel.org/r/20210621235248.2521620-1-di

[PATCH v2 0/3] iommu: Enable non-strict DMA on QCom SD/MMC

y things pointed out by Greg. Douglas Anderson (3): iommu: Add per-domain strictness and combine with the global default iommu/arm-smmu: Check for strictness after calling impl->init_context() mmc: sdhci-msm: Request non-strict IOMMU mode .../admin-guide/kernel-parameters.txt | 5

[PATCH v2 1/3] iommu: Add per-domain strictness and combine with the global default

ine "iommu.strict=1" or a call to iommu_set_dma_strict(true). [0] https://lore.kernel.org/r/a023af85-5060-0a3c-4648-b00f8b8c0...@arm.com/ Signed-off-by: Douglas Anderson --- This patch clearly will cause conflicts if John Garry's patches [1] land before it. It shouldn't be too hard to