x86/CPU/AMD: Move the DIV0 bug detection to the Zen1 init function

No functional changes.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: http://lore.kernel.org/r/20231120104152.13740-9-bp@alien8.de

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 3c3b4c1ad3ca3f0f745c299cbc2ac474493a015c..13ad44bea494e004aeab3a9a693bd9b7fa7d8649 100644 (file)
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -70,10 +70,6 @@ static const int amd_erratum_383[] =
 static const int amd_erratum_1054[] =
        AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x17, 0, 0, 0x2f, 0xf));
 
-static const int amd_div0[] =
-       AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x17, 0x00, 0x0, 0x2f, 0xf),
-                          AMD_MODEL_RANGE(0x17, 0x50, 0x0, 0x5f, 0xf));
-
 static const int amd_erratum_1485[] =
        AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x19, 0x10, 0x0, 0x1f, 0xf),
                           AMD_MODEL_RANGE(0x19, 0x60, 0x0, 0xaf, 0xf));
@@ -1030,6 +1026,9 @@ static void init_amd_zen(struct cpuinfo_x86 *c)
                if (!cpu_has(c, X86_FEATURE_CPB))
                        set_cpu_cap(c, X86_FEATURE_CPB);
        }
+
+       pr_notice_once("AMD Zen1 DIV0 bug detected. Disable SMT for full protection.\n");
+       setup_force_cpu_bug(X86_BUG_DIV0);
 }
 
 static bool cpu_has_zenbleed_microcode(void)
@@ -1067,7 +1066,6 @@ static void zen2_zenbleed_check(struct cpuinfo_x86 *c)
        } else {
                msr_clear_bit(MSR_AMD64_DE_CFG, MSR_AMD64_DE_CFG_ZEN2_FP_BACKUP_FIX_BIT);
        }
-
 }
 
 static void init_amd_zen2(struct cpuinfo_x86 *c)
@@ -1219,11 +1217,6 @@ static void init_amd(struct cpuinfo_x86 *c)
            cpu_has(c, X86_FEATURE_AUTOIBRS))
                WARN_ON_ONCE(msr_set_bit(MSR_EFER, _EFER_AUTOIBRS));
 
-       if (cpu_has_amd_erratum(c, amd_div0)) {
-               pr_notice_once("AMD Zen1 DIV0 bug detected. Disable SMT for full protection.\n");
-               setup_force_cpu_bug(X86_BUG_DIV0);
-       }
-
        if (!cpu_has(c, X86_FEATURE_HYPERVISOR) &&
             cpu_has_amd_erratum(c, amd_erratum_1485))
                msr_set_bit(MSR_ZEN4_BP_CFG, MSR_ZEN4_BP_CFG_SHARED_BTB_FIX_BIT);