X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fsvm_msr.c;fp=palacios%2Fsrc%2Fpalacios%2Fsvm_msr.c;h=bd16fb2024acee8ba2f47e344db46f925cc905e1;hb=5b6278751429f59297ce74e614d50632daea3748;hp=0000000000000000000000000000000000000000;hpb=03a41b18bdb6ce4bf666f18acdaf302e2360efdc;p=palacios.git

diff --git a/palacios/src/palacios/svm_msr.c b/palacios/src/palacios/svm_msr.c
new file mode 100644
index 0000000..bd16fb2
--- /dev/null
+++ b/palacios/src/palacios/svm_msr.c
@@ -0,0 +1,141 @@
+/* 
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National 
+ * Science Foundation and the Department of Energy.  
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico.  You can find out more at 
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu> 
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org> 
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software.  You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+#include <palacios/svm_msr.h>
+#include <palacios/vmm_msr.h>
+
+#include <palacios/vmm_list.h>
+
+
+#define PENTIUM_MSRS_START            0x00000000
+#define PENTIUM_MSRS_END              0x00001fff
+#define AMD_6_GEN_MSRS_START          0xc0000000
+#define AMD_6_GEN_MSRS_END            0xc0001fff
+#define AMD_7_8_GEN_MSRS_START        0xc0010000
+#define AMD_7_8_GEN_MSRS_END          0xc0011fff
+
+#define PENTIUM_MSRS_INDEX            (0x0 * 4)
+#define AMD_6_GEN_MSRS_INDEX          (0x800 * 4)
+#define AMD_7_8_GEN_MSRS_INDEX        (0x1000 * 4)
+
+
+
+static int get_bitmap_index(uint_t msr) {
+  if ((msr >= PENTIUM_MSRS_START) && 
+      (msr <= PENTIUM_MSRS_END)) {
+    return (PENTIUM_MSRS_INDEX + (msr - PENTIUM_MSRS_START));
+  } else if ((msr >= AMD_6_GEN_MSRS_START) && 
+	     (msr <= AMD_6_GEN_MSRS_END)) {
+    return (AMD_6_GEN_MSRS_INDEX + (msr - AMD_6_GEN_MSRS_START));
+  } else if ((msr >= AMD_7_8_GEN_MSRS_START) && 
+	     (msr <= AMD_7_8_GEN_MSRS_END)) {
+    return (AMD_7_8_GEN_MSRS_INDEX + (msr - AMD_7_8_GEN_MSRS_START));
+  } else {
+    PrintError("MSR out of range (MSR=0x%x)\n", msr);
+    return -1;
+  }
+}
+
+
+
+addr_t v3_init_svm_msr_map(struct guest_info * info) {
+  uchar_t * msr_bitmap = (uchar_t*)V3_VAddr(V3_AllocPages(2));
+  struct v3_msr_map * msr_map = &(info->msr_map);
+  struct v3_msr_hook * hook = NULL;
+  
+  
+  memset(msr_bitmap, 0, PAGE_SIZE * 2);
+
+  list_for_each_entry(hook, &(msr_map->hook_list), link) {
+    int index = get_bitmap_index(hook->msr);
+    uint_t byte_offset = index / 4;
+    uint_t bit_offset = (index % 4) * 2;
+    uchar_t val = 0;
+    uchar_t mask = ~0x3;
+
+    if (hook->read) {
+      val |= 0x1;
+    } 
+
+    if (hook->write) {
+      val |= 0x2;
+    }
+
+    val = val << bit_offset;
+    mask = mask << bit_offset;
+
+    *(msr_bitmap + byte_offset) &= mask;
+    *(msr_bitmap + byte_offset) |= val;
+  }
+
+  return (addr_t)V3_PAddr(msr_bitmap);
+}
+
+
+
+int v3_handle_msr_write(struct guest_info * info) {
+  uint_t msr_num = info->vm_regs.rcx;
+  struct v3_msr msr_val;
+  struct v3_msr_hook * hook = NULL;
+
+  hook = v3_get_msr_hook(info, msr_num);
+
+  if (!hook) {
+    PrintError("Hook for MSR write %d not found\n", msr_num);
+    return -1;
+  }
+
+  msr_val.value = 0;
+  msr_val.lo = info->vm_regs.rax;
+  msr_val.hi = info->vm_regs.rdx;
+
+  if (hook->write(msr_num, msr_val, hook->priv_data) == -1) {
+    PrintError("Error in MSR hook Write\n");
+    return -1;
+  }
+
+  return 0;
+}
+
+
+
+int v3_handle_msr_read(struct guest_info * info) {
+  uint_t msr_num = info->vm_regs.rcx;
+  struct v3_msr msr_val;
+  struct v3_msr_hook * hook = NULL;
+
+  hook = v3_get_msr_hook(info, msr_num);
+
+  if (!hook) {
+    PrintError("Hook for MSR read %d not found\n", msr_num);
+    return -1;
+  }
+
+  msr_val.value = 0;
+  
+  if (hook->read(msr_num, &msr_val, hook->priv_data) == -1) {
+    PrintError("Error in MSR hook Read\n");
+    return -1;
+  }
+
+  info->vm_regs.rax = msr_val.lo;
+  info->vm_regs.rdx = msr_val.hi;
+  
+  return 0;
+}