[PATCH v9 07/13] x86/resctrl: Add vendor check for MBA software controller

Moger, Babu
2018-11-21T20:28:53Z

MBA software controller support is available only on Intel.

Suggested-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
---
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index cf159095b612..fada488069cb 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1878,7 +1878,10 @@ static int parse_rdtgroupfs_options(char *data)
if (ret)
goto out;
} else if (!strcmp(token, "mba_MBps")) {
- ret = set_mba_sc(true);
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL)
+ ret = set_mba_sc(true);
+ else
+ ret = -EINVAL;
if (ret)
goto out;
} else {
--
2.17.1