From: Borislav Petkov <bp@suse.de>
Date: Fri, 15 Jun 2018 18:48:39 +0000 (+0200)
Subject: x86/CPU/AMD: Do not check CPUID max ext level before parsing SMP info
X-Git-Tag: for-linus-20180825~123^2~55
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=119bff8a9c9bb00116a844ec68be7bc4b1c768f5;p=linux-2.6-block.git

x86/CPU/AMD: Do not check CPUID max ext level before parsing SMP info

Old code used to check whether CPUID ext max level is >= 0x80000008 because
that last leaf contains the number of cores of the physical CPU.  The three
functions called there now do not depend on that leaf anymore so the check
can go.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 9fb1c681b63a..d120e5cefca9 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -848,12 +848,9 @@ static void init_amd(struct cpuinfo_x86 *c)
 
 	cpu_detect_cache_sizes(c);
 
-	/* Multi core CPU? */
-	if (c->extended_cpuid_level >= 0x80000008) {
-		amd_detect_cmp(c);
-		amd_get_topology(c);
-		srat_detect_node(c);
-	}
+	amd_detect_cmp(c);
+	amd_get_topology(c);
+	srat_detect_node(c);
 
 	init_amd_cacheinfo(c);