* [PATCH AUTOSEL 4.19 50/53] iommu/amd: Set exclusion range correctly [not found] ` <20190427014051.7522-1-sashal-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> @ 2019-04-27 1:40 ` Sasha Levin 2019-04-27 1:40 ` Sasha Levin 0 siblings, 1 reply; 2+ messages in thread From: Sasha Levin @ 2019-04-27 1:40 UTC (permalink / raw) To: linux-kernel-u79uwXL29TY76Z2rM5mHXA, stable-u79uwXL29TY76Z2rM5mHXA Cc: Sasha Levin, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA, Joerg Roedel From: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org> [ Upstream commit 3c677d206210f53a4be972211066c0f1cd47fe12 ] The exlcusion range limit register needs to contain the base-address of the last page that is part of the range, as bits 0-11 of this register are treated as 0xfff by the hardware for comparisons. So correctly set the exclusion range in the hardware to the last page which is _in_ the range. Fixes: b2026aa2dce44 ('x86, AMD IOMMU: add functions for programming IOMMU MMIO space') Signed-off-by: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org> Signed-off-by: Sasha Levin <sashal-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> --- drivers/iommu/amd_iommu_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index e062ab9687c7..5689e07799e3 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -356,7 +356,7 @@ static void iommu_write_l2(struct amd_iommu *iommu, u8 address, u32 val) static void iommu_set_exclusion_range(struct amd_iommu *iommu) { u64 start = iommu->exclusion_start & PAGE_MASK; - u64 limit = (start + iommu->exclusion_length) & PAGE_MASK; + u64 limit = (start + iommu->exclusion_length - 1) & PAGE_MASK; u64 entry; if (!iommu->exclusion_start) -- 2.19.1 ^ permalink raw reply related [flat|nested] 2+ messages in thread
* [PATCH AUTOSEL 4.19 50/53] iommu/amd: Set exclusion range correctly 2019-04-27 1:40 ` [PATCH AUTOSEL 4.19 50/53] iommu/amd: Set exclusion range correctly Sasha Levin @ 2019-04-27 1:40 ` Sasha Levin 0 siblings, 0 replies; 2+ messages in thread From: Sasha Levin @ 2019-04-27 1:40 UTC (permalink / raw) To: linux-kernel, stable; +Cc: Sasha Levin, iommu, Joerg Roedel From: Joerg Roedel <jroedel@suse.de> [ Upstream commit 3c677d206210f53a4be972211066c0f1cd47fe12 ] The exlcusion range limit register needs to contain the base-address of the last page that is part of the range, as bits 0-11 of this register are treated as 0xfff by the hardware for comparisons. So correctly set the exclusion range in the hardware to the last page which is _in_ the range. Fixes: b2026aa2dce44 ('x86, AMD IOMMU: add functions for programming IOMMU MMIO space') Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/iommu/amd_iommu_init.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index e062ab9687c7..5689e07799e3 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -356,7 +356,7 @@ static void iommu_write_l2(struct amd_iommu *iommu, u8 address, u32 val) static void iommu_set_exclusion_range(struct amd_iommu *iommu) { u64 start = iommu->exclusion_start & PAGE_MASK; - u64 limit = (start + iommu->exclusion_length) & PAGE_MASK; + u64 limit = (start + iommu->exclusion_length - 1) & PAGE_MASK; u64 entry; if (!iommu->exclusion_start) -- 2.19.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu ^ permalink raw reply related [flat|nested] 2+ messages in thread
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[not found] ` <20190427014051.7522-1-sashal-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2019-04-27 1:40 ` [PATCH AUTOSEL 4.19 50/53] iommu/amd: Set exclusion range correctly Sasha Levin
2019-04-27 1:40 ` Sasha Levin
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