From: Lu Baolu Date: Thu, 18 Sep 2025 05:02:04 +0000 (+0800) Subject: iommu/vt-d: debugfs: Avoid dumping context command register X-Git-Tag: v6.18-rc1~105^2^5~1 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=5bd5ab53e7b8c87908341accb3ad8da555d6b778;p=thirdparty%2Flinux.git iommu/vt-d: debugfs: Avoid dumping context command register 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 Link: https://lore.kernel.org/r/20250917025051.143853-1-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel --- diff --git a/drivers/iommu/intel/debugfs.c b/drivers/iommu/intel/debugfs.c index 765edb3740e2..617fd81a80f0 100644 --- a/drivers/iommu/intel/debugfs.c +++ b/drivers/iommu/intel/debugfs.c @@ -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),