optional support for kernel code virtualization

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1753 c046a42c-6fe2-441c-8c8c-71466251a162
kvaneesh · Feb 8, 2006 · f32fc64 · f32fc64
1 parent f1c8567
commit f32fc64
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Showing 4 changed files with 216 additions and 37 deletions.
diff --git a/cpu-exec.c b/cpu-exec.c
@@ -627,6 +627,9 @@ int cpu_exec(CPUState *env1)
                    jump. */
                 {
                     if (T0 != 0 &&
+#if USE_KQEMU
+                        (env->kqemu_enabled != 2) &&
+#endif
                         tb->page_addr[1] == -1
 #if defined(TARGET_I386) && defined(USE_CODE_COPY)
                     && (tb->cflags & CF_CODE_COPY) == 
@@ -755,6 +758,13 @@ int cpu_exec(CPUState *env1)
                     /* do not allow linking to another block */
                     T0 = 0;
                 }
+#endif
+#if defined(USE_KQEMU)
+#define MIN_CYCLE_BEFORE_SWITCH (100 * 1000)
+                if (kqemu_is_ok(env) &&
+                    (cpu_get_time_fast() - env->last_io_time) >= MIN_CYCLE_BEFORE_SWITCH) {
+                    cpu_loop_exit();
+                }
 #endif
             }
         } else {

diff --git a/exec-all.h b/exec-all.h
@@ -577,21 +577,27 @@ static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
 
 
 #ifdef USE_KQEMU
+#define KQEMU_MODIFY_PAGE_MASK (0xff & ~(VGA_DIRTY_FLAG | CODE_DIRTY_FLAG))
+
 int kqemu_init(CPUState *env);
 int kqemu_cpu_exec(CPUState *env);
 void kqemu_flush_page(CPUState *env, target_ulong addr);
 void kqemu_flush(CPUState *env, int global);
 void kqemu_set_notdirty(CPUState *env, ram_addr_t ram_addr);
+void kqemu_modify_page(CPUState *env, ram_addr_t ram_addr);
 void kqemu_cpu_interrupt(CPUState *env);
+void kqemu_record_dump(void);
 
 static inline int kqemu_is_ok(CPUState *env)
 {
     return(env->kqemu_enabled &&
-           (env->hflags & HF_CPL_MASK) == 3 &&
-           (env->eflags & IOPL_MASK) != IOPL_MASK &&
            (env->cr[0] & CR0_PE_MASK) && 
+           !(env->hflags & HF_INHIBIT_IRQ_MASK) &&
            (env->eflags & IF_MASK) &&
-           !(env->eflags & VM_MASK));
+           !(env->eflags & VM_MASK) &&
+           (env->kqemu_enabled == 2 || 
+            ((env->hflags & HF_CPL_MASK) == 3 &&
+             (env->eflags & IOPL_MASK) != IOPL_MASK)));
 }
 
 #endif
diff --git a/exec.c b/exec.c
@@ -1796,6 +1796,11 @@ static void notdirty_mem_writeb(void *opaque, target_phys_addr_t addr, uint32_t
 #endif
     }
     stb_p((uint8_t *)(long)addr, val);
+#ifdef USE_KQEMU
+    if (cpu_single_env->kqemu_enabled &&
+        (dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK)
+        kqemu_modify_page(cpu_single_env, ram_addr);
+#endif
     dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
     phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags;
     /* we remove the notdirty callback only if the code has been
@@ -1817,6 +1822,11 @@ static void notdirty_mem_writew(void *opaque, target_phys_addr_t addr, uint32_t
 #endif
     }
     stw_p((uint8_t *)(long)addr, val);
+#ifdef USE_KQEMU
+    if (cpu_single_env->kqemu_enabled &&
+        (dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK)
+        kqemu_modify_page(cpu_single_env, ram_addr);
+#endif
     dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
     phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags;
     /* we remove the notdirty callback only if the code has been
@@ -1838,6 +1848,11 @@ static void notdirty_mem_writel(void *opaque, target_phys_addr_t addr, uint32_t
 #endif
     }
     stl_p((uint8_t *)(long)addr, val);
+#ifdef USE_KQEMU
+    if (cpu_single_env->kqemu_enabled &&
+        (dirty_flags & KQEMU_MODIFY_PAGE_MASK) != KQEMU_MODIFY_PAGE_MASK)
+        kqemu_modify_page(cpu_single_env, ram_addr);
+#endif
     dirty_flags |= (0xff & ~CODE_DIRTY_FLAG);
     phys_ram_dirty[ram_addr >> TARGET_PAGE_BITS] = dirty_flags;
     /* we remove the notdirty callback only if the code has been