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[Xen-devel] [PATCH 1 of 2] vpmu: Add a cpuid function


  • To: "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Shan, Haitao" <haitao.shan@xxxxxxxxx>
  • From: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>
  • Date: Mon, 13 Feb 2012 14:01:34 +0100
  • Cc: "Shan, Haitao" <haitao.shan@xxxxxxxxx>
  • Delivery-date: Mon, 13 Feb 2012 13:02:08 +0000
  • Domainkey-signature: s=s1536a; d=ts.fujitsu.com; c=nofws; q=dns; h=X-SBRSScore:X-IronPort-AV:Received:X-IronPort-AV: Received:Received:From:To:Cc:Subject:Date:Message-ID: User-Agent:MIME-Version:Content-Transfer-Encoding: Content-Type; b=tN8U2wHvs7stweGLAToWKNFfd2rrP+pvg10/OIWuGLjNKqwtOtvt6gXS Vf1H+OTkZeNAD0UlxVE74VXmVFniRhHU/8G240vsj7G0iWx18nsaJPQUQ LwXnlUWPoqEpVunuUbaLCdB9mY9b2D+/22d5e1E95sWSMte3tOK4HMRVY 02kVaqd2b95KGNTFq2VViSJq/EHSuCdCiVl3gft97X7vXksXF07gB6pEu Ie5MC30Tu1jmYuKsEzJX59iih3BUM;
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Add a new function - do_cpuid - to the vpmu struct arch_vpmu_ops.
This permits the vpmu to set specific bits in the cpuid for the hvm guest.


Signed-off-by: Dietmar Hahn <dietmar.hahn@xxxxxxxxxxxxxx>


 xen/arch/x86/hvm/vmx/vmx.c        |   2 ++
 xen/arch/x86/hvm/vmx/vpmu_core2.c |   7 +++++++
 xen/arch/x86/hvm/vpmu.c           |  10 ++++++++++
 xen/include/asm-x86/hvm/vpmu.h    |   5 +++++
 4 files changed, 24 insertions(+), 0 deletions(-)


diff -r 9ad1e42c341b xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c        Fri Feb 10 17:24:50 2012 +0000
+++ b/xen/arch/x86/hvm/vmx/vmx.c        Mon Feb 13 12:36:09 2012 +0100
@@ -1603,6 +1603,8 @@ static void vmx_cpuid_intercept(
             break;
     }
 
+    vpmu_do_cpuid(input, eax, ebx, ecx, edx);
+
     HVMTRACE_5D (CPUID, input, *eax, *ebx, *ecx, *edx);
 }
 
diff -r 9ad1e42c341b xen/arch/x86/hvm/vmx/vpmu_core2.c
--- a/xen/arch/x86/hvm/vmx/vpmu_core2.c Fri Feb 10 17:24:50 2012 +0000
+++ b/xen/arch/x86/hvm/vmx/vpmu_core2.c Mon Feb 13 12:36:09 2012 +0100
@@ -578,6 +578,12 @@ static int core2_vpmu_do_interrupt(struc
     return 1;
 }
 
+static void core2_vpmu_do_cpuid(unsigned int input,
+                                unsigned int *eax, unsigned int *ebx,
+                                unsigned int *ecx, unsigned int *edx)
+{
+}
+
 static void core2_vpmu_initialise(struct vcpu *v)
 {
     check_pmc_quirk();
@@ -602,6 +608,7 @@ struct arch_vpmu_ops core2_vpmu_ops = {
     .do_wrmsr = core2_vpmu_do_wrmsr,
     .do_rdmsr = core2_vpmu_do_rdmsr,
     .do_interrupt = core2_vpmu_do_interrupt,
+    .do_cpuid = core2_vpmu_do_cpuid,
     .arch_vpmu_initialise = core2_vpmu_initialise,
     .arch_vpmu_destroy = core2_vpmu_destroy,
     .arch_vpmu_save = core2_vpmu_save,
diff -r 9ad1e42c341b xen/arch/x86/hvm/vpmu.c
--- a/xen/arch/x86/hvm/vpmu.c   Fri Feb 10 17:24:50 2012 +0000
+++ b/xen/arch/x86/hvm/vpmu.c   Mon Feb 13 12:36:09 2012 +0100
@@ -62,6 +62,16 @@ int vpmu_do_interrupt(struct cpu_user_re
     return 0;
 }
 
+void vpmu_do_cpuid(unsigned int input,
+                   unsigned int *eax, unsigned int *ebx,
+                   unsigned int *ecx, unsigned int *edx)
+{
+    struct vpmu_struct *vpmu = vcpu_vpmu(current);
+
+    if ( vpmu->arch_vpmu_ops && vpmu->arch_vpmu_ops->do_cpuid)
+        vpmu->arch_vpmu_ops->do_cpuid(input, eax, ebx, ecx, edx);
+}
+
 void vpmu_save(struct vcpu *v)
 {
     struct vpmu_struct *vpmu = vcpu_vpmu(v);
diff -r 9ad1e42c341b xen/include/asm-x86/hvm/vpmu.h
--- a/xen/include/asm-x86/hvm/vpmu.h    Fri Feb 10 17:24:50 2012 +0000
+++ b/xen/include/asm-x86/hvm/vpmu.h    Mon Feb 13 12:36:09 2012 +0100
@@ -50,6 +50,9 @@ struct arch_vpmu_ops {
     int (*do_wrmsr)(unsigned int msr, uint64_t msr_content);
     int (*do_rdmsr)(unsigned int msr, uint64_t *msr_content);
     int (*do_interrupt)(struct cpu_user_regs *regs);
+    void (*do_cpuid)(unsigned int input,
+                     unsigned int *eax, unsigned int *ebx,
+                     unsigned int *ecx, unsigned int *edx);
     void (*arch_vpmu_initialise)(struct vcpu *v);
     void (*arch_vpmu_destroy)(struct vcpu *v);
     void (*arch_vpmu_save)(struct vcpu *v);
@@ -78,6 +81,8 @@ struct vpmu_struct {
 int vpmu_do_wrmsr(unsigned int msr, uint64_t msr_content);
 int vpmu_do_rdmsr(unsigned int msr, uint64_t *msr_content);
 int vpmu_do_interrupt(struct cpu_user_regs *regs);
+void vpmu_do_cpuid(unsigned int input, unsigned int *eax, unsigned int *ebx,
+                                       unsigned int *ecx, unsigned int *edx);
 void vpmu_initialise(struct vcpu *v);
 void vpmu_destroy(struct vcpu *v);
 void vpmu_save(struct vcpu *v);

-- 
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