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xen: PAT support on AMD

PATCH New Christoph Egger 1 participant 1 message Aug 12, 2009

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Christoph Egger

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PATCH 1/1 xen: PAT support on AMD

Hi!

Attached patch adds PAT support on AMD CPUs.

Signed-off-by Christoph Egger <[email protected]>

Keir: Please apply this to Xen-3.4-testing and Xen-3.3-testing, too.

Signature · 6 lines
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Karl-Hammerschmidt-Str. 34, 85609 Dornach b. Muenchen
Geschaeftsfuehrer: Thomas M. McCoy, Giuliano Meroni
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632
xen/arch/x86/hvm/svm/vmcb.c +3 -0
diff -r 57033bc8cd30 xen/arch/x86/hvm/svm/vmcb.c
@@ -155,6 +155,7 @@ static int construct_vmcb(struct vcpu *v
     svm_disable_intercept_for_msr(v, MSR_LSTAR);
     svm_disable_intercept_for_msr(v, MSR_STAR);
     svm_disable_intercept_for_msr(v, MSR_SYSCALL_MASK);
+    svm_disable_intercept_for_msr(v, MSR_IA32_CR_PAT);
 
     vmcb->msrpm_base_pa = (u64)virt_to_maddr(arch_svm->msrpm);
     vmcb->iopm_base_pa  = (u64)virt_to_maddr(hvm_io_bitmap);

@@ -247,6 +250,8 @@ static int construct_vmcb(struct vcpu *v
     else
     {
         vmcb->exception_intercepts |= (1U << TRAP_page_fault);
+        if ( cpu_has_pat )
+            svm_enable_intercept_for_msr(v, MSR_IA32_CR_PAT);
     }
 
     if ( cpu_has_pause_filter )

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