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| author | Reinette Chatre <reinette.chatre@intel.com> | 2020-05-05 15:36:15 -0700 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-05-06 17:58:08 +0200 |
| commit | 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 (patch) | |
| tree | a16d84bf2dd59db8579605cf7c6be7875eacfcf7 /arch/x86/kernel/cpu/amd.c | |
| parent | f0d339db56478e3bcd98d5e985d3d69cacf27549 (diff) | |
| download | linux-923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9.tar.bz2 | |
x86/resctrl: Query LLC monitoring properties once during boot
Cache and memory bandwidth monitoring are features that are part of
x86 CPU resource control that is supported by the resctrl subsystem.
The monitoring properties are obtained via CPUID from every CPU
and only used within the resctrl subsystem where the properties are
only read from boot_cpu_data.
Obtain the monitoring properties once, placed in boot_cpu_data, via the
->c_bsp_init() helpers of the vendors that support X86_FEATURE_CQM_LLC.
Suggested-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/6d74a6ac3e69f4b7a8b4115835f9455faf0f468d.1588715690.git.reinette.chatre@intel.com
Diffstat (limited to 'arch/x86/kernel/cpu/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index 547ad7bbf0e0..c36e89930965 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -18,6 +18,7 @@ #include <asm/pci-direct.h> #include <asm/delay.h> #include <asm/debugreg.h> +#include <asm/resctrl.h> #ifdef CONFIG_X86_64 # include <asm/mmconfig.h> @@ -597,6 +598,8 @@ static void bsp_init_amd(struct cpuinfo_x86 *c) x86_amd_ls_cfg_ssbd_mask = 1ULL << bit; } } + + resctrl_cpu_detect(c); } static void early_detect_mem_encrypt(struct cpuinfo_x86 *c) |