linux-kernel - [PATCH 12/13] x86/CPU/AMD: Get rid of amd_erratum

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Date:   Mon, 20 Nov 2023 11:41:51 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     X86 ML <x86@...nel.org>
Cc:     LKML <linux-kernel@...r.kernel.org>
Subject: [PATCH 12/13] x86/CPU/AMD: Get rid of amd_erratum_1485[]

From: "Borislav Petkov (AMD)" <bp@...en8.de>

No functional changes.

Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
---
 arch/x86/kernel/cpu/amd.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index f913ca245639..54e07c9b1292 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -59,10 +59,6 @@ static u32 nodes_per_socket = 1;
 #define AMD_MODEL_RANGE_START(range)	(((range) >> 12) & 0xfff)
 #define AMD_MODEL_RANGE_END(range)	((range) & 0xfff)
 
-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));
-
 static bool cpu_has_amd_erratum(struct cpuinfo_x86 *cpu, const int *erratum)
 {
 	int osvw_id = *erratum++;
@@ -1093,6 +1089,9 @@ static void init_amd_zen3(struct cpuinfo_x86 *c)
 static void init_amd_zen4(struct cpuinfo_x86 *c)
 {
 	init_amd_zen_common();
+
+	if (!cpu_has(c, X86_FEATURE_HYPERVISOR))
+		msr_set_bit(MSR_ZEN4_BP_CFG, MSR_ZEN4_BP_CFG_SHARED_BTB_FIX_BIT);
 }
 
 static void init_amd(struct cpuinfo_x86 *c)
@@ -1215,10 +1214,6 @@ static void init_amd(struct cpuinfo_x86 *c)
 	if (spectre_v2_in_eibrs_mode(spectre_v2_enabled) &&
 	    cpu_has(c, X86_FEATURE_AUTOIBRS))
 		WARN_ON_ONCE(msr_set_bit(MSR_EFER, _EFER_AUTOIBRS));
-
-	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);
 }
 
 #ifdef CONFIG_X86_32
-- 
2.42.0.rc0.25.ga82fb66fed25