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| author | Tianxiang Peng <txpeng@tencent.com> | 2025-06-23 17:31:53 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-28 16:34:42 +0200 |
| commit | d23264c257a70dbe021b43b3bc2ee16134cd2c69 (patch) | |
| tree | de640eef575b30d78c9949167e93cc52ab5d7782 /rust/kernel/error.rs | |
| parent | 7d06af2fa25b41ecd9f470c3d2a8ff3757bae637 (diff) | |
x86/cpu/hygon: Add missing resctrl_cpu_detect() in bsp_init helper
commit d8df126349dad855cdfedd6bbf315bad2e901c2f upstream.
Since
923f3a2b48bd ("x86/resctrl: Query LLC monitoring properties once during boot")
resctrl_cpu_detect() has been moved from common CPU initialization code to
the vendor-specific BSP init helper, while Hygon didn't put that call in their
code.
This triggers a division by zero fault during early booting stage on our
machines with X86_FEATURE_CQM* supported, where get_rdt_mon_resources() tries
to calculate mon_l3_config with uninitialized boot_cpu_data.x86_cache_occ_scale.
Add the missing resctrl_cpu_detect() in the Hygon BSP init helper.
[ bp: Massage commit message. ]
Fixes: 923f3a2b48bd ("x86/resctrl: Query LLC monitoring properties once during boot")
Signed-off-by: Tianxiang Peng <txpeng@tencent.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Hui Li <caelli@tencent.com>
Cc: <stable@kernel.org>
Link: https://lore.kernel.org/20250623093153.3016937-1-txpeng@tencent.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'rust/kernel/error.rs')
0 files changed, 0 insertions, 0 deletions