HV: ve820 fix "Casting operation to a pointer"

ACRN Coding guidelines requires two different types pointer can't
convert to each other, except void *.

Tracked-On: #861
Signed-off-by: Huihuang Shi <huihuang.shi@intel.com>

Author: Shawnshh

hypervisor/arch/x86/configs/apl-mrb/ve820.c

@@ -46,5 +46,5 @@ static const struct e820_entry ve820_entry[VE820_ENTRIES_APL_MRB] = {
 void create_prelaunched_vm_e820(struct acrn_vm *vm)
 {
 	vm->e820_entry_num = VE820_ENTRIES_APL_MRB;
-	vm->e820_entries = (struct e820_entry *)ve820_entry;
+	vm->e820_entries = ve820_entry;
 }

hypervisor/arch/x86/configs/dnv-cb2/ve820.c

@@ -46,5 +46,5 @@ static const struct e820_entry ve820_entry[VE820_ENTRIES_DNV_CB2] = {
 void create_prelaunched_vm_e820(struct acrn_vm *vm)
 {
 	vm->e820_entry_num = VE820_ENTRIES_DNV_CB2;
-	vm->e820_entries = (struct e820_entry *)ve820_entry;
+	vm->e820_entries = ve820_entry;
 }

hypervisor/arch/x86/configs/nuc7i7bnh/ve820.c

@@ -45,5 +45,5 @@ static const struct e820_entry ve820_entry[VE820_ENTRIES_KBL_NUC_i7] = {
 void create_prelaunched_vm_e820(struct acrn_vm *vm)
 {
 	vm->e820_entry_num = VE820_ENTRIES_KBL_NUC_i7;
-	vm->e820_entries = (struct e820_entry *)ve820_entry;
+	vm->e820_entries = ve820_entry;
 }

hypervisor/arch/x86/guest/vm.c

@@ -188,7 +188,7 @@ static void prepare_prelaunched_vm_memmap(struct acrn_vm *vm, const struct acrn_
 	uint32_t i;
 
 	for (i = 0U; i < vm->e820_entry_num; i++) {
-		struct e820_entry *entry = &(vm->e820_entries[i]);
+		const struct e820_entry *entry = &(vm->e820_entries[i]);
 
 		if (entry->length == 0UL) {
 			break;
@@ -327,7 +327,7 @@ static void prepare_sos_vm_memmap(struct acrn_vm *vm)
 
 	const struct e820_entry *entry;
 	uint32_t entries_count = vm->e820_entry_num;
-	struct e820_entry *p_e820 = vm->e820_entries;
+	const struct e820_entry *p_e820 = vm->e820_entries;
 	const struct e820_mem_params *p_e820_mem_info = get_e820_mem_info();
 
 	pr_dbg("sos_vm: bottom memory - 0x%llx, top memory - 0x%llx\n",

hypervisor/common/vm_load.c

@@ -38,7 +38,7 @@ static uint32_t create_zeropage_e820(struct zero_page *zp, const struct acrn_vm
 {
 	uint32_t entry_num = vm->e820_entry_num;
 	struct e820_entry *zp_e820 = zp->entries;
-	struct e820_entry *vm_e820 = vm->e820_entries;
+	const struct e820_entry *vm_e820 = vm->e820_entries;
 
 	if ((zp_e820 == NULL) || (vm_e820 == NULL) || (entry_num == 0U) || (entry_num > E820_MAX_ENTRIES)) {
 		pr_err("e820 create error");

hypervisor/include/arch/x86/guest/vm.h

@@ -111,7 +111,7 @@ struct acrn_vm {
 	struct vm_sw_info sw;	/* Reference to SW associated with this VM */
 	struct vm_pm_info pm;	/* Reference to this VM's arch information */
 	uint32_t e820_entry_num;
-	struct e820_entry *e820_entries;
+	const struct e820_entry *e820_entries;
 	uint16_t vm_id;		    /* Virtual machine identifier */
 	enum vm_state state;	/* VM state */
 	struct acrn_vuart vuart[MAX_VUART_NUM_PER_VM];		/* Virtual UART */