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iommu/vt-d: debugfs: Avoid dumping context command register

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The register-based cache invalidation interface is in the process of being
replaced by the queued invalidation interface. The VT-d architecture
allows hardware implementations with a queued invalidation interface to
not implement the registers used for cache invalidation. Currently, the
debugfs interface dumps the Context Command Register unconditionally,
which is not reasonable.

Remove it to avoid potential access to non-present registers.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20250917025051.143853-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Lu Baolu 2025-09-18 13:02:04 +08:00 committed by Joerg Roedel
parent 7d4e404102
commit 5bd5ab53e7
1 changed files with 0 additions and 1 deletions
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drivers/iommu/intel/debugfs.c
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@ -62,7 +62,6 @@ static const struct iommu_regset iommu_regs_64[] = {
IOMMU_REGSET_ENTRY(CAP),
IOMMU_REGSET_ENTRY(ECAP),
IOMMU_REGSET_ENTRY(RTADDR),
IOMMU_REGSET_ENTRY(CCMD),
IOMMU_REGSET_ENTRY(PHMBASE),
IOMMU_REGSET_ENTRY(PHMLIMIT),
IOMMU_REGSET_ENTRY(IQH),