All of lore.kernel.org
 help / color / mirror / Atom feed
From: Andreas Herrmann <andreas.herrmann3@amd.com>
To: Ingo Molnar <mingo@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>,
	Thomas Gleixner <tglx@linutronix.de>
Cc: <x86@kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH 1/4] x86: Add cpu_has_topoext
Date: Fri, 19 Oct 2012 10:58:13 +0200	[thread overview]
Message-ID: <20121019085813.GD26718@alberich> (raw)
In-Reply-To: <20121019085519.GC26718@alberich>


Introduce cpu_has_topoext to check for AMD's CPUID topology extensions
support. It indicates support for
CPUID Fn8000_001D_EAX_x[N:0]-CPUID Fn8000_001E_EDX

See AMD's CPUID Specification, Publication # 25481
(as of Rev. 2.34 September 2010)

Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com>
---
 arch/x86/include/asm/cpufeature.h |    1 +
 arch/x86/kernel/cpu/amd.c         |    2 +-
 arch/x86/kernel/smpboot.c         |    2 +-
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 16cae42..c13a1f4 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -309,6 +309,7 @@ extern const char * const x86_power_flags[32];
 #define cpu_has_cx8		boot_cpu_has(X86_FEATURE_CX8)
 #define cpu_has_cx16		boot_cpu_has(X86_FEATURE_CX16)
 #define cpu_has_eager_fpu	boot_cpu_has(X86_FEATURE_EAGER_FPU)
+#define cpu_has_topoext		boot_cpu_has(X86_FEATURE_TOPOEXT)
 
 #if defined(CONFIG_X86_INVLPG) || defined(CONFIG_X86_64)
 # define cpu_has_invlpg		1
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index f7e98a2..64e9ad4 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -304,7 +304,7 @@ static void __cpuinit amd_get_topology(struct cpuinfo_x86 *c)
 	int cpu = smp_processor_id();
 
 	/* get information required for multi-node processors */
-	if (cpu_has(c, X86_FEATURE_TOPOEXT)) {
+	if (cpu_has_topoext) {
 		u32 eax, ebx, ecx, edx;
 
 		cpuid(0x8000001e, &eax, &ebx, &ecx, &edx);
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index c80a33b..732bf5c 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -313,7 +313,7 @@ do {									\
 
 static bool __cpuinit match_smt(struct cpuinfo_x86 *c, struct cpuinfo_x86 *o)
 {
-	if (cpu_has(c, X86_FEATURE_TOPOEXT)) {
+	if (cpu_has_topoext) {
 		int cpu1 = c->cpu_index, cpu2 = o->cpu_index;
 
 		if (c->phys_proc_id == o->phys_proc_id &&
-- 
1.7.8.6



  reply	other threads:[~2012-10-19  8:58 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-19  8:55 [PATCH 0/4] x86, cacheinfo: Use AMD topology extensions Andreas Herrmann
2012-10-19  8:58 ` Andreas Herrmann [this message]
2012-11-13 21:58   ` [tip:x86/cpu] x86: Add cpu_has_topoext tip-bot for Andreas Herrmann
2012-10-19  8:59 ` [PATCH 2/4] x86, cacheinfo: Determine number of cache leafs using CPUID 0x8000001d on AMD Andreas Herrmann
2012-11-13 21:59   ` [tip:x86/cpu] " tip-bot for Andreas Herrmann
2012-10-19  9:00 ` [PATCH 3/4] x86, cacheinfo: Make use of CPUID 0x8000001d for cache information " Andreas Herrmann
2012-11-13 22:00   ` [tip:x86/cpu] " tip-bot for Andreas Herrmann
2012-10-19  9:02 ` [PATCH 4/4] x86, cacheinfo: Base cache sharing info on CPUID 0x8000001d " Andreas Herrmann
2012-11-13 22:01   ` [tip:x86/cpu] " tip-bot for Andreas Herrmann
2012-11-06 20:47 ` [PATCH 0/4] x86, cacheinfo: Use AMD topology extensions Jacob Shin
2012-11-07  9:48   ` H. Peter Anvin
2012-11-13 18:28     ` Jacob Shin

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20121019085813.GD26718@alberich \
    --to=andreas.herrmann3@amd.com \
    --cc=hpa@zytor.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.