wip: associating a vmxon region to its corresponding vcpu

proto/hypervisor.c

@@ -16,8 +16,10 @@
 #include "asm/special_insns.h"
 #include "asm/tlbflush.h"
 #include "debug/debug.h"
+#include "linux/threads.h"
 #include "msr/msr.h"
-#include "region/vxmon_reg.h"
+#include "region/vxmon.h"
+#include "vcpu/vcpu.h"
 
 #define NULL ((void *)0)
 
@@ -27,7 +29,7 @@
 /*    : clobbered registers list          (optional)*/
 /*    );*/
 
-static struct vmxon_region_t vmxon_region;
+static struct vcpu_t vcpus[1];
 
 static int cr4_enable_vmx(void) {
     unsigned long cr4;
@@ -177,18 +179,22 @@ static int my_init(void) {
 
     DEBUG_FMT("IA32_VMX_BASIC_MSR = 0x%llx\n", __rdmsr(IA32_VMX_BASIC));
 
-    pr_info("Initializing VMXON region\n");
-    int ret_init_vmxon;
-    if ((ret_init_vmxon = init_vmxon_reg(&vmxon_region)) != 0) {
-        pr_err("Failed to initialized the VMXON region\n");
-        return -ret_init_vmxon;
+    pr_info("Allocating VMXON region\n");
+
+    struct vmxon_t *vmxon_reg = alloc_vmxon();
+
+    if (!vmxon_reg) {
+        pr_err("VMXON region allocation failed\n");
+        return -ENOMEM;
     }
 
-    pr_info("VA of the allocated region = 0x%px\n", vmxon_region.va);
-    pr_info("PA of the allocated region = 0x%llx\n", vmxon_region.pa);
+    vmxon_regions[0] = vmxon_reg;
+
+    pr_info("VA of the allocated region = 0x%px\n", vmxon_reg);
+    pr_info("PA of the allocated region = 0x%lx\n", __pa(vmxon_reg));
 
-    pr_info("Reading VMXON region for VMCS ID: 0x%lx\n",
-            (*(unsigned long *)vmxon_region.va));
+    pr_info("Reading VMXON region for VMCS ID: 0x%x\n",
+            vmxon_reg->header.vmcs_rev_id);
 
     pr_info("Patching CR0 and CR4 depending on the value of their respective "
             "MSRs\n");
@@ -209,18 +215,18 @@ static int my_init(void) {
         return -EPERM;
     }
 
-    pr_info("Executing VMXON with address = 0x%llx as its operand\n",
-            vmxon_region.pa);
+    pr_info("Executing VMXON with address = 0x%lx as its operand\n",
+            __pa(vmxon_reg));
 
     unsigned char vmxon_ret = 0;
 
     /*if ((vmxon_ret = vmxon(vmxon_region.pa) != 0)) {*/
-    if ((vmxon_ret = kvm_cpu_vmxon(vmxon_region.pa) != 0)) {
+    if ((vmxon_ret = kvm_cpu_vmxon(__pa(vmxon_reg)) != 0)) {
         /*unsigned long vm_err = __rdmsr(0x4400);*/
         /*pr_err("VM_ERR val = 0x%lx\n", vm_err);*/
         cr4_clear_bits(13);
 
-        kfree(vmxon_region.va);
+        kfree(vmxon_reg);
         /*__asm__ volatile("vmxoff");*/
         pr_err("`vmxon` failed with return code %d\n", vmxon_ret);
         return -1;
@@ -242,7 +248,7 @@ static void my_exit(void) {
     }
 
     pr_info("Freeing memory of the VMXON region\n");
-    kfree(vmxon_region.va);
+    kfree(vmxon_regions[0]);
 
     pr_info("vmbr.ko has exited\n");
 }