[PATCH v6 09/14] arch/x86: Add vendor check for MBA software controller
From: "Moger, Babu" <Babu.Moger@amd.com>
Date: 2018-11-06 15:41:23
Also in:
lkml
Subsystem:
the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
MBA software controller support is available only on Intel. Suggested-by: Fenghua Yu <redacted> 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 8b6b4a8bb7ca..022a56096024 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