KVM: SVM: Add manipulation functions for DRx intercepts

This patch wraps changes to the DRx intercepts of SVM into
seperate functions to abstract nested-svm better and prepare
the implementation of the vmcb-clean-bits feature.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 17 insertions, 10 deletions

diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index 39f9ddf07136..11dbca7a582a 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -52,8 +52,7 @@ enum {
 
 struct __attribute__ ((__packed__)) vmcb_control_area {
         u32 intercept_cr;
-        u16 intercept_dr_read;
-        u16 intercept_dr_write;
+        u32 intercept_dr;
         u32 intercept_exceptions;
         u64 intercept;
         u8 reserved_1[42];
@@ -212,14 +211,22 @@ struct __attribute__ ((__packed__)) vmcb {
 #define INTERCEPT_CR4_WRITE     (16 + 4)
 #define INTERCEPT_CR8_WRITE     (16 + 8)
 
-#define INTERCEPT_DR0_MASK 1
-#define INTERCEPT_DR1_MASK (1 << 1)
-#define INTERCEPT_DR2_MASK (1 << 2)
-#define INTERCEPT_DR3_MASK (1 << 3)
-#define INTERCEPT_DR4_MASK (1 << 4)
-#define INTERCEPT_DR5_MASK (1 << 5)
-#define INTERCEPT_DR6_MASK (1 << 6)
-#define INTERCEPT_DR7_MASK (1 << 7)
+#define INTERCEPT_DR0_READ      0
+#define INTERCEPT_DR1_READ      1
+#define INTERCEPT_DR2_READ      2
+#define INTERCEPT_DR3_READ      3
+#define INTERCEPT_DR4_READ      4
+#define INTERCEPT_DR5_READ      5
+#define INTERCEPT_DR6_READ      6
+#define INTERCEPT_DR7_READ      7
+#define INTERCEPT_DR0_WRITE     (16 + 0)
+#define INTERCEPT_DR1_WRITE     (16 + 1)
+#define INTERCEPT_DR2_WRITE     (16 + 2)
+#define INTERCEPT_DR3_WRITE     (16 + 3)
+#define INTERCEPT_DR4_WRITE     (16 + 4)
+#define INTERCEPT_DR5_WRITE     (16 + 5)
+#define INTERCEPT_DR6_WRITE     (16 + 6)
+#define INTERCEPT_DR7_WRITE     (16 + 7)
 
 #define SVM_EVTINJ_VEC_MASK 0xff