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hv: reserve smbios table region in ve820

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Reserve SMBIOS table region in ve820 to prevent kernel from using it.
it.

Tracked-On: #7735
Signed-off-by: Yifan Liu <yifan1.liu@intel.com>
This commit is contained in:
Yifan Liu 2022-06-10 02:38:39 +00:00 committed by Zheng Shuang
parent 79359441ff
commit 69d0440c4c
1 changed files with 10 additions and 0 deletions
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10
hypervisor/quirks/smbios.c
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@ -165,6 +165,15 @@ static void recalc_checksum(uint8_t *byte_start, uint8_t nbytes, uint8_t *checks
*checksum_pos = -sum;
}
static void reserve_smbios_region(struct acrn_vm *vm, uint64_t addr, uint64_t size)
{
struct e820_entry *entry = &vm->e820_entries[vm->e820_entry_num];
entry->baseaddr = round_page_down(addr);
entry->length = round_page_up(addr + size) - entry->baseaddr;
entry->type = E820_TYPE_RESERVED;
vm->e820_entry_num++;
}
static int copy_smbios_to_guest(struct acrn_vm *vm)
{
uint64_t gpa;
@ -185,6 +194,7 @@ static int copy_smbios_to_guest(struct acrn_vm *vm)
if (gpa != INVALID_GPA) {
ret = copy_to_gpa(vm, smbios_table, gpa, smbios_table_size);
if (ret == 0) {
reserve_smbios_region(vm, gpa, smbios_table_size);
if (smbios_eps.eps.anchor[3] == '_') {
/* SMBIOS (_SM_) */
struct smbios_entry_point *eps = &smbios_eps.eps;