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cxl: Adjust offset calculation for poison injection

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The HPA to DPA translation for poison injection assumes that the
base address starts from where the CXL region begins. When the
extended linear cache is active, the offset can be within the DRAM
region. Adjust the offset so that it correctly reflects the offset
within the CXL region.

[ dj: Add fixes tag from Alison ]

Fixes: c3dd67681c ("cxl/region: Add inject and clear poison by region offset")
Link: https://patch.msgid.link/20251031173224.3537030-5-dave.jiang@intel.com
Reviewed-by: Alison Schofield <alison.schofield@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
This commit is contained in:
Dave Jiang
2025-10-31 10:32:24 -07:00
parent 7c3643f204
commit b6cfddd26e
1 changed files with 2 additions and 0 deletions
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2
drivers/cxl/core/region.c
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@@ -3702,6 +3702,7 @@ static int cxl_region_debugfs_poison_inject(void *data, u64 offset)
if (validate_region_offset(cxlr, offset))
return -EINVAL;
offset -= cxlr->params.cache_size;
rc = region_offset_to_dpa_result(cxlr, offset, &result);
if (rc || !result.cxlmd || result.dpa == ULLONG_MAX) {
dev_dbg(&cxlr->dev,
@@ -3734,6 +3735,7 @@ static int cxl_region_debugfs_poison_clear(void *data, u64 offset)
if (validate_region_offset(cxlr, offset))
return -EINVAL;
offset -= cxlr->params.cache_size;
rc = region_offset_to_dpa_result(cxlr, offset, &result);
if (rc || !result.cxlmd || result.dpa == ULLONG_MAX) {
dev_dbg(&cxlr->dev,