[PATCH 23/24] PVH xen: preparatory patch for the pvh vmexit handler patch

[Mukesh Rathor <mukesh.rathor@oracle.com>]

This is a preparatory patch for the next pvh vmexit handler patch.

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
---
 xen/arch/x86/hvm/vmx/pvh.c        |    5 +++++
 xen/arch/x86/hvm/vmx/vmx.c        |    6 ++++++
 xen/arch/x86/traps.c              |    4 ++--
 xen/include/asm-x86/hvm/vmx/vmx.h |    1 +
 xen/include/asm-x86/processor.h   |    2 ++
 xen/include/asm-x86/traps.h       |    2 ++
 6 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/pvh.c b/xen/arch/x86/hvm/vmx/pvh.c
index 8638850..fb55ac8 100644
--- a/xen/arch/x86/hvm/vmx/pvh.c
+++ b/xen/arch/x86/hvm/vmx/pvh.c
@@ -20,6 +20,11 @@
 #include <asm/hvm/nestedhvm.h>
 #include <asm/xstate.h>
 
+/* Implemented in the next patch */
+void vmx_pvh_vmexit_handler(struct cpu_user_regs *regs)
+{
+}
+
 /* 
  * Set vmcs fields in support of vcpu_op -> VCPUOP_initialise hcall.  Called 
  * from arch_set_info_guest() which sets the (PVH relevant) non-vmcs fields.
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 8f08253..59070a8 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2491,6 +2491,12 @@ void vmx_vmexit_handler(struct cpu_user_regs *regs)
     if ( unlikely(exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) )
         return vmx_failed_vmentry(exit_reason, regs);
 
+    if ( is_pvh_vcpu(v) )
+    {
+        vmx_pvh_vmexit_handler(regs);
+        return;
+    }
+
     if ( v->arch.hvm_vmx.vmx_realmode )
     {
         /* Put RFLAGS back the way the guest wants it */
diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index 5325e92..1e8cf60 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -745,7 +745,7 @@ 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;
 
@@ -1904,7 +1904,7 @@ static int is_cpufreq_controller(struct domain *d)
 
 #include "x86_64/mmconfig.h"
 
-static int emulate_privileged_op(struct cpu_user_regs *regs)
+int emulate_privileged_op(struct cpu_user_regs *regs)
 {
     enum x86_segment which_sel;
     struct vcpu *v = current;
diff --git a/xen/include/asm-x86/hvm/vmx/vmx.h b/xen/include/asm-x86/hvm/vmx/vmx.h
index 9e6c481..44e4136 100644
--- a/xen/include/asm-x86/hvm/vmx/vmx.h
+++ b/xen/include/asm-x86/hvm/vmx/vmx.h
@@ -474,6 +474,7 @@ void vmx_dr_access(unsigned long exit_qualification,
                    struct cpu_user_regs *regs);
 void vmx_fpu_enter(struct vcpu *v);
 int  vmx_pvh_set_vcpu_info(struct vcpu *v, struct vcpu_guest_context *ctxtp);
+void vmx_pvh_vmexit_handler(struct cpu_user_regs *regs);
 
 int alloc_p2m_hap_data(struct p2m_domain *p2m);
 void free_p2m_hap_data(struct p2m_domain *p2m);
diff --git a/xen/include/asm-x86/processor.h b/xen/include/asm-x86/processor.h
index 5cdacc7..22a9653 100644
--- a/xen/include/asm-x86/processor.h
+++ b/xen/include/asm-x86/processor.h
@@ -566,6 +566,8 @@ 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 */
diff --git a/xen/include/asm-x86/traps.h b/xen/include/asm-x86/traps.h
index 1d9b087..8c3540a 100644
--- a/xen/include/asm-x86/traps.h
+++ b/xen/include/asm-x86/traps.h
@@ -50,4 +50,6 @@ extern int send_guest_trap(struct domain *d, uint16_t vcpuid,
 				unsigned int trap_nr);
 int emulate_forced_invalid_op(struct cpu_user_regs *regs);
 
+int emulate_privileged_op(struct cpu_user_regs *regs);
+
 #endif /* ASM_TRAP_H */
-- 
1.7.2.3