[Qemu-devel] [4668] SVM: added tsc_offset

[Qemu-devel] [4668] SVM: added tsc_offset

[Fabrice Bellard]

Revision: 4668
          http://svn.sv.gnu.org/viewvc/?view=rev&root=qemu&revision=4668
Author:   bellard
Date:     2008-06-04 17:39:33 +0000 (Wed, 04 Jun 2008)

Log Message:
-----------
SVM: added tsc_offset

Modified Paths:
--------------
    trunk/target-i386/cpu.h
    trunk/target-i386/op_helper.c

Modified: trunk/target-i386/cpu.h
===================================================================
--- trunk/target-i386/cpu.h	2008-06-04 17:37:03 UTC (rev 4667)
+++ trunk/target-i386/cpu.h	2008-06-04 17:39:33 UTC (rev 4668)
@@ -119,9 +119,9 @@
 #define ID_MASK                 0x00200000
 
 /* hidden flags - used internally by qemu to represent additional cpu
-   states. Only the CPL and INHIBIT_IRQ are not redundant. We avoid
-   using the IOPL_MASK, TF_MASK and VM_MASK bit position to ease oring
-   with eflags. */
+   states. Only the CPL, INHIBIT_IRQ, SMM and SVMI are not
+   redundant. We avoid using the IOPL_MASK, TF_MASK and VM_MASK bit
+   position to ease oring with eflags. */
 /* current cpl */
 #define HF_CPL_SHIFT         0
 /* true if soft mmu is being used */
@@ -543,6 +543,7 @@
 
     target_phys_addr_t vm_hsave;
     target_phys_addr_t vm_vmcb;
+    uint64_t tsc_offset;
     uint64_t intercept;
     uint16_t intercept_cr_read;
     uint16_t intercept_cr_write;

Modified: trunk/target-i386/op_helper.c
===================================================================
--- trunk/target-i386/op_helper.c	2008-06-04 17:37:03 UTC (rev 4667)
+++ trunk/target-i386/op_helper.c	2008-06-04 17:39:33 UTC (rev 4668)
@@ -3005,7 +3005,7 @@
     }
     helper_svm_check_intercept_param(SVM_EXIT_RDTSC, 0);
 
-    val = cpu_get_tsc(env);
+    val = cpu_get_tsc(env) + env->tsc_offset;
     EAX = (uint32_t)(val);
     EDX = (uint32_t)(val >> 32);
 }
@@ -4851,6 +4851,8 @@
     /* enable intercepts */
     env->hflags |= HF_SVMI_MASK;
 
+    env->tsc_offset = ldq_phys(env->vm_vmcb + offsetof(struct vmcb, control.tsc_offset));
+
     env->gdt.base  = ldq_phys(env->vm_vmcb + offsetof(struct vmcb, save.gdtr.base));
     env->gdt.limit = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, save.gdtr.limit));
 
@@ -5226,6 +5228,7 @@
     env->intercept = 0;
     env->intercept_exceptions = 0;
     env->interrupt_request &= ~CPU_INTERRUPT_VIRQ;
+    env->tsc_offset = 0;
 
     env->gdt.base  = ldq_phys(env->vm_hsave + offsetof(struct vmcb, save.gdtr.base));
     env->gdt.limit = ldl_phys(env->vm_hsave + offsetof(struct vmcb, save.gdtr.limit));