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From: "Joerg Roedel" <joerg.roedel@amd.com>
To: "Avi Kivity" <avi@qumranet.com>
Cc: kvm-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org,
	"Joerg Roedel" <joerg.roedel@amd.com>
Subject: [PATCH 1/8] SVM: move feature detection to hardware setup code
Date: Thu,  7 Feb 2008 13:47:38 +0100	[thread overview]
Message-ID: <1202388465-8657-2-git-send-email-joerg.roedel@amd.com> (raw)
In-Reply-To: <1202388465-8657-1-git-send-email-joerg.roedel@amd.com>

By moving the SVM feature detection from the each_cpu code to the hardware
setup code it runs only once. As an additional advance the feature check is now
available earlier in the module setup process.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
 arch/x86/kvm/svm.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index d1c7fcb..c0aaa85 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -302,7 +302,6 @@ static void svm_hardware_enable(void *garbage)
 	svm_data->asid_generation = 1;
 	svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
 	svm_data->next_asid = svm_data->max_asid + 1;
-	svm_features = cpuid_edx(SVM_CPUID_FUNC);
 
 	asm volatile ("sgdt %0" : "=m"(gdt_descr));
 	gdt = (struct desc_struct *)gdt_descr.address;
@@ -408,6 +407,9 @@ static __init int svm_hardware_setup(void)
 		if (r)
 			goto err_2;
 	}
+
+	svm_features = cpuid_edx(SVM_CPUID_FUNC);
+
 	return 0;
 
 err_2:
-- 
1.5.3.7




  reply	other threads:[~2008-02-07 12:51 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-07 12:47 KVM: add support for SVM Nested Paging Joerg Roedel
2008-02-07 12:47 ` Joerg Roedel [this message]
2008-02-07 12:47 ` [PATCH 2/8] SVM: add detection of Nested Paging feature Joerg Roedel
2008-02-07 12:47 ` [PATCH 3/8] SVM: add module parameter to disable Nested Paging Joerg Roedel
2008-02-07 12:47 ` [PATCH 4/8] X86: export information about NPT to generic x86 code Joerg Roedel
2008-02-07 12:47 ` [PATCH 5/8] MMU: make the __nonpaging_map function generic Joerg Roedel
2008-02-07 12:47 ` [PATCH 6/8] X86: export the load_pdptrs() function to modules Joerg Roedel
2008-02-07 12:47 ` [PATCH 7/8] MMU: add TDP support to the KVM MMU Joerg Roedel
2008-02-07 13:27   ` [kvm-devel] " Izik Eidus
2008-02-07 13:50     ` Joerg Roedel
2008-02-07 14:04       ` Izik Eidus
2008-02-07 12:47 ` [PATCH 8/8] SVM: add support for Nested Paging Joerg Roedel
2008-02-10 12:03 ` [kvm-devel] KVM: add support for SVM " Avi Kivity
  -- strict thread matches above, loose matches on Subject: below --
2008-01-25 20:53 [PATCH][RFC] SVM: Add Support for Nested Paging in AMD Fam16 CPUs Joerg Roedel
2008-01-25 20:53 ` [PATCH 1/8] SVM: move feature detection to hardware setup code Joerg Roedel

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