linux-kernel - [tip: x86/cpu] x86/CPU/AMD: Move Zenbleed check to the Zen2 init function

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Date:   Wed, 29 Nov 2023 11:22:29 -0000
From:   "tip-bot2 for Borislav Petkov (AMD)" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Borislav Petkov (AMD)" <bp@...en8.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/cpu] x86/CPU/AMD: Move Zenbleed check to the Zen2 init function

The following commit has been merged into the x86/cpu branch of tip:

Commit-ID:     f69759be251dce722942594fbc62e53a40822a82
Gitweb:        https://git.kernel.org/tip/f69759be251dce722942594fbc62e53a40822a82
Author:        Borislav Petkov (AMD) <bp@...en8.de>
AuthorDate:    Wed, 01 Nov 2023 12:38:35 +01:00
Committer:     Borislav Petkov (AMD) <bp@...en8.de>
CommitterDate: Wed, 29 Nov 2023 12:12:34 +01:00

x86/CPU/AMD: Move Zenbleed check to the Zen2 init function

Prefix it properly so that it is clear which generation it is dealing
with.

No functional changes.

Signed-off-by: Borislav Petkov (AMD) <bp@...en8.de>
Link: http://lore.kernel.org/r/20231120104152.13740-8-bp@alien8.de
---
 arch/x86/kernel/cpu/amd.c | 16 +++-------------
 1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index f53e0a2..3c3b4c1 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -70,12 +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_zenbleed[] =
-	AMD_LEGACY_ERRATUM(AMD_MODEL_RANGE(0x17, 0x30, 0x0, 0x4f, 0xf),
-			   AMD_MODEL_RANGE(0x17, 0x60, 0x0, 0x7f, 0xf),
-			   AMD_MODEL_RANGE(0x17, 0x90, 0x0, 0x91, 0xf),
-			   AMD_MODEL_RANGE(0x17, 0xa0, 0x0, 0xaf, 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));
@@ -1059,11 +1053,8 @@ static bool cpu_has_zenbleed_microcode(void)
 	return true;
 }
 
-static void zenbleed_check(struct cpuinfo_x86 *c)
+static void zen2_zenbleed_check(struct cpuinfo_x86 *c)
 {
-	if (!cpu_has_amd_erratum(c, amd_zenbleed))
-		return;
-
 	if (cpu_has(c, X86_FEATURE_HYPERVISOR))
 		return;
 
@@ -1084,6 +1075,7 @@ static void init_amd_zen2(struct cpuinfo_x86 *c)
 	init_amd_zen_common();
 	init_spectral_chicken(c);
 	fix_erratum_1386(c);
+	zen2_zenbleed_check(c);
 }
 
 static void init_amd_zen3(struct cpuinfo_x86 *c)
@@ -1227,8 +1219,6 @@ static void init_amd(struct cpuinfo_x86 *c)
 	    cpu_has(c, X86_FEATURE_AUTOIBRS))
 		WARN_ON_ONCE(msr_set_bit(MSR_EFER, _EFER_AUTOIBRS));
 
-	zenbleed_check(c);
-
 	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);
@@ -1393,7 +1383,7 @@ static void zenbleed_check_cpu(void *unused)
 {
 	struct cpuinfo_x86 *c = &cpu_data(smp_processor_id());
 
-	zenbleed_check(c);
+	zen2_zenbleed_check(c);
 }
 
 void amd_check_microcode(void)