[Xen-devel] [PATCH v15 13/19] pvh: PV cpuid

[George Dunlap <george.dunlap@xxxxxxxxxxxxx>]

Call the PV version of CPUID.

NB at the moment we do not handle forced emulated ops.  This means, for example,
that xen-detect will report an HVM Xen guest instead of a PV one.

Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
Signed-off-by: Mukesh Rathor <mukesh.rathor@xxxxxxxxxx>
---
v15:
 - Break pvcpuid into a separate patch

CC: Jan Beulich <jbeulich@xxxxxxxx>
CC: Tim Deegan <tim@xxxxxxx>
CC: Keir Fraser <keir@xxxxxxx>
CC: Jun Nakajima <jun.nakajima@xxxxxxxxx>
CC: Eddie Dong <eddie.dong@xxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmx.c      |    2 +-
 xen/arch/x86/traps.c            |    2 +-
 xen/include/asm-x86/processor.h |    2 ++
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 8289e3a..bc86f93 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2748,8 +2748,8 @@ void vmx_vmexit_handler(struct cpu_user_regs *regs)
         break;
     }
     case EXIT_REASON_CPUID:
+        is_pvh_vcpu(v) ? pv_cpuid(regs) : vmx_do_cpuid(regs);
         update_guest_eip(); /* Safe: CPUID */
-        vmx_do_cpuid(regs);
         break;
     case EXIT_REASON_HLT:
         update_guest_eip(); /* Safe: HLT */
diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index edb7a6a..852b8e6 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -729,7 +729,7 @@ int cpuid_hypervisor_leaves( uint32_t idx, uint32_t sub_idx,
     return 1;
 }
 
-static void pv_cpuid(struct cpu_user_regs *regs)
+void pv_cpuid(struct cpu_user_regs *regs)
 {
     uint32_t a, b, c, d;
 
diff --git a/xen/include/asm-x86/processor.h b/xen/include/asm-x86/processor.h
index 893afa3..551036d 100644
--- a/xen/include/asm-x86/processor.h
+++ b/xen/include/asm-x86/processor.h
@@ -567,6 +567,8 @@ void microcode_set_module(unsigned int);
 int microcode_update(XEN_GUEST_HANDLE_PARAM(const_void), unsigned long len);
 int microcode_resume_cpu(int cpu);
 
+void pv_cpuid(struct cpu_user_regs *regs);
+
 #endif /* !__ASSEMBLY__ */
 
 #endif /* __ASM_X86_PROCESSOR_H */
-- 
1.7.9.5


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