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Mon, 23 Jun 2025 02:32:03 -0700 (PDT) Received: from localhost.localdomain ([180.101.244.64]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-237d869fbfcsm81271235ad.194.2025.06.23.02.31.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Jun 2025 02:32:02 -0700 (PDT) From: Tianxiang Peng X-Google-Original-From: Tianxiang Peng To: puwen@hygon.cn, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org Cc: linux-kernel@vger.kernel.org, Tianxiang Peng , Hui Li Subject: [PATCH RESEND] x86/cpu/hygon: fix missing resctrl_cpu_detect() in bsp_init helper Date: Mon, 23 Jun 2025 17:31:53 +0800 Message-ID: <20250623093153.3016937-1-txpeng@tencent.com> X-Mailer: git-send-email 2.43.5 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Since upstream commit 923f3a2b48bdccb6a1d1f0dd48de03de7ad936d9 ("x86/resctrl: Query LLC monitoring properties once during boot"), resctrl_cpu_detect() has been moved from common cpu initialization code to vendor-specific bsp init helper, while hygon didn't put that call in their code. This triggers div-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. Fix the missing resctrl_cpu_detect() in hygon bsp init helper. Signed-off-by: Tianxiang Peng Reviewed-by: Hui Li --- arch/x86/kernel/cpu/hygon.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/kernel/cpu/hygon.c b/arch/x86/kernel/cpu/hygon.c index 9f914bf80180..5f73bad0b9fd 100644 --- a/arch/x86/kernel/cpu/hygon.c +++ b/arch/x86/kernel/cpu/hygon.c @@ -16,6 +16,7 @@ #include #include #include +#include =20 #ifdef CONFIG_X86_64 # include @@ -271,6 +272,8 @@ static void bsp_init_hygon(struct cpuinfo_x86 *c) x86_amd_ls_cfg_ssbd_mask =3D 1ULL << 10; } } + + resctrl_cpu_detect(c); } =20 static void early_init_hygon(struct cpuinfo_x86 *c) --=20 2.43.5