In the case of memory error injection, einj_error_inject() checks
if a target address is regular RAM. Update this check to add a call
to region_intersects_pmem() to verify if a target address range is
NVDIMM. This allows injecting a memory error to both RAM and NVDIMM
for testing.
Also, the current RAM check, page_is_ram(), is replaced with
region_intersects_ram() so that it can verify a target address
range with the requested size.
Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx>
Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>
---
Add a blank line before if-statement. (Borislav Petkov)
---
drivers/acpi/apei/einj.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index 0431883..db21efe 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -519,7 +519,7 @@ static int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
u64 param3, u64 param4)
{
int rc;
- unsigned long pfn;
+ u64 base_addr, size;
/* If user manually set "flags", make sure it is legal */
if (flags && (flags &
@@ -545,10 +545,15 @@ static int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
/*
* Disallow crazy address masks that give BIOS leeway to pick
* injection address almost anywhere. Insist on page or
- * better granularity and that target address is normal RAM.
+ * better granularity and that target address is normal RAM or
+ * NVDIMM.
*/
- pfn = PFN_DOWN(param1 & param2);
- if (!page_is_ram(pfn) || ((param2 & PAGE_MASK) != PAGE_MASK))
+ base_addr = param1 & param2;
+ size = (~param2) + 1;
+
+ if (((region_intersects_ram(base_addr, size) != REGION_INTERSECTS) &&
+ (region_intersects_pmem(base_addr, size) != REGION_INTERSECTS)) ||
+ ((param2 & PAGE_MASK) != PAGE_MASK))
return -EINVAL;
inject:
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
the body to majordomo@xxxxxxxxx. For more info on Linux MM,
see: http://www.linux-mm.org/ .
Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>