| Message ID | 20250523172001.1761634-1-anil.s.keshavamurthy@intel.com |
|---|---|
| State | Accepted |
| Commit | 059717c2ba1f745f35f4bbb8991e408c12031f1e |
| Headers | show |
| Series | ACPI/MRRM: Fix default max memory region | expand |
diff --git a/drivers/acpi/acpi_mrrm.c b/drivers/acpi/acpi_mrrm.c index 2f22f013959a..26c1a4e6b6ec 100644 --- a/drivers/acpi/acpi_mrrm.c +++ b/drivers/acpi/acpi_mrrm.c @@ -14,7 +14,8 @@ #include <linux/string.h> #include <linux/sysfs.h> -static int max_mem_region = -ENOENT; +/* Default assume one memory region covering all system memory, per the spec */ +static int max_mem_region = 1; /* Access for use by resctrl file system */ int acpi_mrrm_max_mem_region(void) diff --git a/include/linux/acpi.h b/include/linux/acpi.h index e72100c0684f..f102c0fe3431 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1101,7 +1101,7 @@ static inline acpi_handle acpi_get_processor_handle(int cpu) static inline int acpi_mrrm_max_mem_region(void) { - return -ENOENT; + return 1; } #endif /* !CONFIG_ACPI */
Per the spec, the default max memory region must be 1 covering all system memory. When platform does not provide ACPI MRRM table or when CONFIG_ACPI is opted out, the acpi_mrrm_max_mem_region() function defaults to returning 1 region complying to RDT spec. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> --- drivers/acpi/acpi_mrrm.c | 3 ++- include/linux/acpi.h | 2 +- 2 files changed, 3 insertions(+), 2 deletions(-)