x86/cpu: Clarify the error message when BIOS does not support SGX

When SGX is not supported by the BIOS, the kernel log contains the error
'SGX disabled by BIOS', which can be confusing since there might not be an
SGX-related option in the BIOS settings.

For the kernel it's difficult to distinguish between the BIOS not
supporting SGX and the BIOS supporting SGX but having it disabled.

Therefore, update the error message to 'SGX disabled or unsupported by
BIOS' to make it easier for those reading kernel logs to understand what's
happening.

Reported-by: Bo Wu <wubo@uniontech.com>
Co-developed-by: Zelong Xiang <xiangzelong@uniontech.com>
Signed-off-by: Zelong Xiang <xiangzelong@uniontech.com>
Signed-off-by: WangYuli <wangyuli@uniontech.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/all/F8D977CB368423F3+20240825104653.1294624-1-wangyuli@uniontech.com
Closes: https://github.com/linuxdeepin/developer-center/issues/10032

diff --git a/arch/x86/kernel/cpu/feat_ctl.c b/arch/x86/kernel/cpu/feat_ctl.c
index 1640ae76548fc71247970398da2bbd35b4c0a5f6..4a4118784c1313273b70af3c323a5fcb8d96ed75 100644 (file)
--- a/arch/x86/kernel/cpu/feat_ctl.c
+++ b/arch/x86/kernel/cpu/feat_ctl.c
@@ -188,7 +188,7 @@ update_caps:
 update_sgx:
        if (!(msr & FEAT_CTL_SGX_ENABLED)) {
                if (enable_sgx_kvm || enable_sgx_driver)
-                       pr_err_once("SGX disabled by BIOS.\n");
+                       pr_err_once("SGX disabled or unsupported by BIOS.\n");
                clear_cpu_cap(c, X86_FEATURE_SGX);
                return;
        }