In the case of memory error injection, einj_error_inject() checks if a target address is System RAM. Change this check to allow injecting a memory error to NVDIMM by calling region_intersects() with IORES_DESC_PERSISTENT_MEMORY. This enables memory error testing on both System RAM and NVDIMM. In addition, page_is_ram() is replaced with region_intersects() with IORESOURCE_SYSTEM_RAM, so that it can verify a target address range with the requested size. Cc: Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Vishal Verma <vishal.l.verma@xxxxxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Cc: Dan Williams <dan.j.williams@xxxxxxxxx> Cc: linux-nvdimm@xxxxxxxxxxxx Cc: linux-acpi@xxxxxxxxxxxxxxx Acked-by: Tony Luck <tony.luck@xxxxxxxxx> Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx> Signed-off-by: Toshi Kani <toshi.kani@xxxxxxx> --- drivers/acpi/apei/einj.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c index 0431883..16cae66 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 +545,17 @@ 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 (((param2 & PAGE_MASK) != PAGE_MASK) || + ((region_intersects(base_addr, size, IORESOURCE_SYSTEM_RAM, + IORES_DESC_NONE) != REGION_INTERSECTS) && + (region_intersects(base_addr, size, IORESOURCE_MEM, + IORES_DESC_PERSISTENT_MEMORY) != REGION_INTERSECTS))) 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>