KVM: x86 emulator: Provide more callbacks for x86 emulator.

Provide get_cached_descriptor(), set_cached_descriptor(),
get_segment_selector(), set_segment_selector(), get_gdt(),
write_std() callbacks.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h
index 07657258af8f..f901467a18b0 100644
--- a/arch/x86/include/asm/kvm_emulate.h
+++ b/arch/x86/include/asm/kvm_emulate.h
@@ -63,6 +63,15 @@ struct x86_emulate_ops {
                         unsigned int bytes, struct kvm_vcpu *vcpu, u32 *error);
 
         /*
+         * write_std: Write bytes of standard (non-emulated/special) memory.
+         *            Used for descriptor writing.
+         *  @addr:  [IN ] Linear address to which to write.
+         *  @val:   [OUT] Value write to memory, zero-extended to 'u_long'.
+         *  @bytes: [IN ] Number of bytes to write to memory.
+         */
+        int (*write_std)(unsigned long addr, void *val,
+                         unsigned int bytes, struct kvm_vcpu *vcpu, u32 *error);
+        /*
          * fetch: Read bytes of standard (non-emulated/special) memory.
          *        Used for instruction fetch.
          *  @addr:  [IN ] Linear address from which to read.
@@ -108,6 +117,13 @@ struct x86_emulate_ops {
                                 const void *new,
                                 unsigned int bytes,
                                 struct kvm_vcpu *vcpu);
+        bool (*get_cached_descriptor)(struct desc_struct *desc,
+                                      int seg, struct kvm_vcpu *vcpu);
+        void (*set_cached_descriptor)(struct desc_struct *desc,
+                                      int seg, struct kvm_vcpu *vcpu);
+        u16 (*get_segment_selector)(int seg, struct kvm_vcpu *vcpu);
+        void (*set_segment_selector)(u16 sel, int seg, struct kvm_vcpu *vcpu);
+        void (*get_gdt)(struct desc_ptr *dt, struct kvm_vcpu *vcpu);
         ulong (*get_cr)(int cr, struct kvm_vcpu *vcpu);
         void (*set_cr)(int cr, ulong val, struct kvm_vcpu *vcpu);
         int (*cpl)(struct kvm_vcpu *vcpu);