linux-kernel - [PATCH 34/37] x86: using logical flat for amd cpu too.

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Message-id: <1263611228-6751-35-git-send-email-yinghai@kernel.org>
Date:	Fri, 15 Jan 2010 19:07:05 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	Ingo Molnar <mingo@...e.hu>, Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jesse Barnes <jbarnes@...tuousgeek.org>,
	Christoph Lameter <cl@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 34/37] x86: using logical flat for amd cpu too.

not sure it works again, could be bios fix the irq routing dest ?

tested that amd support logical flat too when cpus num <= 8 and even
bsp apic id > 8

so could remove vendor check...

Signed-off-by: Yinghai Lu <yinghai@...nel.org>
---
 arch/x86/kernel/apic/apic.c     |   11 ++---------
 arch/x86/kernel/apic/probe_64.c |   13 ++-----------
 2 files changed, 4 insertions(+), 20 deletions(-)

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index aa57c07..c5f4906 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1898,15 +1898,8 @@ void __cpuinit generic_processor_info(int apicid, int version)
 		max_physical_apicid = apicid;
 
 #ifdef CONFIG_X86_32
-	switch (boot_cpu_data.x86_vendor) {
-	case X86_VENDOR_INTEL:
-		if (num_processors > 8)
-			def_to_bigsmp = 1;
-		break;
-	case X86_VENDOR_AMD:
-		if (max_physical_apicid >= 8)
-			def_to_bigsmp = 1;
-	}
+	if (num_processors > 8)
+		def_to_bigsmp = 1;
 #endif
 
 #if defined(CONFIG_SMP) || defined(CONFIG_X86_64)
diff --git a/arch/x86/kernel/apic/probe_64.c b/arch/x86/kernel/apic/probe_64.c
index c4cbd30..0a428dd 100644
--- a/arch/x86/kernel/apic/probe_64.c
+++ b/arch/x86/kernel/apic/probe_64.c
@@ -67,17 +67,8 @@ void __init default_setup_apic_routing(void)
 	}
 #endif
 
-	if (apic == &apic_flat) {
-		switch (boot_cpu_data.x86_vendor) {
-		case X86_VENDOR_INTEL:
-			if (num_processors > 8)
-				apic = &apic_physflat;
-			break;
-		case X86_VENDOR_AMD:
-			if (max_physical_apicid >= 8)
-				apic = &apic_physflat;
-		}
-	}
+	if (apic == &apic_flat && num_processors > 8)
+		apic = &apic_physflat;
 
 	printk(KERN_INFO "Setting APIC routing to %s\n", apic->name);
 
-- 
1.6.4.2

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