From: Reinette Chatre <reinette.cha...@intel.com>
A system supporting pseudo-locking may have MBA as well as CAT
resources of which only the CAT resources could support cache
pseudo-locking. When the schemata to be pseudo-locked is provided it
should be checked that that schemata does not attempt to pseudo-lock a
MBA resource.
Fixes: e0bdfe8e3 ("x86/intel_rdt: Support creation/removal of pseudo-locked
region")
Signed-off-by: Reinette Chatre <reinette.cha...@intel.com>
Signed-off-by: Fenghua Yu <fenghua...@intel.com>
---
arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
index d427c86e7cd0..44b7a689d083 100644
--- a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
+++ b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
@@ -200,6 +200,12 @@ static int parse_line(char *line, struct rdt_resource *r,
struct rdt_domain *d;
unsigned long dom_id;
+ if (rdtgrp->mode == RDT_MODE_PSEUDO_LOCKSETUP &&
+ r->rid == RDT_RESOURCE_MBA) {
+ rdt_last_cmd_puts("Cannot pseudo-lock MBA resource\n");
+ return -EINVAL;
+ }
+
next:
if (!line || line[0] == '\0')
return 0;
--
2.19.0
