diff options
| author | Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> | 2025-05-23 13:20:01 -0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-05-23 20:05:02 +0200 |
| commit | 059717c2ba1f745f35f4bbb8991e408c12031f1e (patch) | |
| tree | 66f866707a0ba8db172d1681b4c0193ca4fec3f2 | |
| parent | 8e66be071bd4d44e8870a37d2e1a9109c47ef22e (diff) | |
ACPI: MRRM: Fix default max memory region
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>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://patch.msgid.link/20250523172001.1761634-1-anil.s.keshavamurthy@intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/acpi/acpi_mrrm.c | 3 | ||||
| -rw-r--r-- | include/linux/acpi.h | 2 |
2 files changed, 3 insertions, 2 deletions
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 c409f4cecb09..d9ba7b4fa2cd 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1098,7 +1098,7 @@ 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 */ |