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| author |   Megha Dey <megha.dey@linux.intel.com> | 2020-03-09 13:09:46 -0700 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2020-03-13 14:25:46 +0100 |
| commit | ba3b01d7a6f4ab9f8a0557044c9a7678f64ae070 (patch) | |
| tree | 2a6c89f12c95aa32f561272a439a17056229a820 /include | |
| parent | iommu/vt-d: quirk_ioat_snb_local_iommu: replace WARN_TAINT with pr_warn + add_taint (diff) | |
| download | linux-dev-ba3b01d7a6f4ab9f8a0557044c9a7678f64ae070.tar.xz linux-dev-ba3b01d7a6f4ab9f8a0557044c9a7678f64ae070.zip | |
iommu/vt-d: Fix debugfs register reads
Commit 6825d3ea6cde ("iommu/vt-d: Add debugfs support to show register
contents") dumps the register contents for all IOMMU devices.
Currently, a 64 bit read(dmar_readq) is done for all the IOMMU registers,
even though some of the registers are 32 bits, which is incorrect.
Use the correct read function variant (dmar_readl/dmar_readq) while
reading the contents of 32/64 bit registers respectively.
Signed-off-by: Megha Dey <megha.dey@linux.intel.com>
Link: https://lore.kernel.org/r/1583784587-26126-2-git-send-email-megha.dey@linux.intel.com
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/intel-iommu.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 4a16b39ae353..980234ae0312 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -123,6 +123,8 @@ #define dmar_readq(a) readq(a) #define dmar_writeq(a,v) writeq(v,a) +#define dmar_readl(a) readl(a) +#define dmar_writel(a, v) writel(v, a) #define DMAR_VER_MAJOR(v) (((v) & 0xf0) >> 4) #define DMAR_VER_MINOR(v) ((v) & 0x0f) |