diff options
| author | Joerg Roedel <jroedel@suse.de> | 2019-04-12 12:50:31 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-05-10 17:52:09 +0200 |
| commit | 6f54cf16fe8c848f0550433f599e4677311574e5 (patch) | |
| tree | 01a78cd5631768ab9ec800cab5611026f4bcc67a /drivers/iommu | |
| parent | c301c5d382dd7f47042bb7631bea70a02dab7b0f (diff) | |
iommu/amd: Set exclusion range correctly
[ 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>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 157e93421fb8..13bbe5795e4e 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -318,7 +318,7 @@ 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) |