[PATCH 2/5] svm: add bit definitions for SVM DecodeAssist

[Andre Przywara <andre.przywara@amd.com>]

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Chapter 15.33 of recent APM Vol.2 manuals describe some additions
to SVM called DecodeAssist. Add the newly added fields to the VMCB
structure and name the associated CPUID bit.

Signed-off-by: Andre Przywara <andre.przywara@amd.com>

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commit c3a6d77443d2d074b5b553ac4167f4b59f9b6408
Author: Andre Przywara <andre.przywara@amd.com>
Date:   Sun Jul 25 14:09:35 2010 +0200

    svm: add bit definitions for SVM DecodeAssist
    
    Chapter 15.33 of recent APM Vol.2 manuals describe some additions
    to SVM called DecodeAssist. Add the newly added fields to the VMCB
    structure and name the associated CPUID bit.
    
    Signed-off-by: Andre Przywara <andre.przywara@amd.com>

diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c
index 981e5c3..279220a 100644
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -1000,6 +1000,7 @@ struct hvm_function_table * __init start_svm(void)
     P(cpu_has_svm_lbrv, "Last Branch Record (LBR) Virtualisation");
     P(cpu_has_svm_nrips, "Next-RIP Saved on #VMEXIT");
     P(cpu_has_svm_cleanbits, "VMCB Clean Bits");
+    P(cpu_has_svm_decode, "DecodeAssists");
     P(cpu_has_pause_filter, "Pause-Intercept Filter");
 #undef P
 
diff --git a/xen/include/asm-x86/hvm/svm/svm.h b/xen/include/asm-x86/hvm/svm/svm.h
index 9f0afd8..59dbf39 100644
--- a/xen/include/asm-x86/hvm/svm/svm.h
+++ b/xen/include/asm-x86/hvm/svm/svm.h
@@ -90,6 +90,7 @@ extern u32 svm_feature_flags;
 #define cpu_has_svm_svml      cpu_has_svm_feature(SVM_FEATURE_SVML)
 #define cpu_has_svm_nrips     cpu_has_svm_feature(SVM_FEATURE_NRIPS)
 #define cpu_has_svm_cleanbits cpu_has_svm_feature(SVM_FEATURE_VMCBCLEAN)
+#define cpu_has_svm_decode    cpu_has_svm_feature(SVM_FEATURE_DECODEASSISTS)
 #define cpu_has_pause_filter  cpu_has_svm_feature(SVM_FEATURE_PAUSEFILTER)
 
 #define SVM_PAUSEFILTER_INIT    3000
diff --git a/xen/include/asm-x86/hvm/svm/vmcb.h b/xen/include/asm-x86/hvm/svm/vmcb.h
index d832216..f589bdf 100644
--- a/xen/include/asm-x86/hvm/svm/vmcb.h
+++ b/xen/include/asm-x86/hvm/svm/vmcb.h
@@ -435,7 +435,9 @@ struct vmcb_struct {
     vmcbcleanbits_t cleanbits;  /* offset 0xC0 */
     u32 res09;                  /* offset 0xC4 */
     u64 nextrip;                /* offset 0xC8 */
-    u64 res10a[102];            /* offset 0xD0 pad to save area */
+    u8  guest_ins_len;          /* offset 0xD0 */
+    u8  guest_ins[15];          /* offset 0xD1 */
+    u64 res10a[100];            /* offset 0xE0 pad to save area */
 
     svm_segment_register_t es;  /* offset 1024 - cleanbit 8 */
     svm_segment_register_t cs;  /* cleanbit 8 */

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