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hv: tee: add an API for creating identical memmap according to e820

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Given an e820, this API creates an identical memmap for specified
e820 memory type, EPT memory cache type and access right.

Tracked-On: #6571
Signed-off-by: Jie Deng <jie.deng@intel.com>
Reviewed-by: Wang, Yu1 <yu1.wang@intel.com>
Acked-by: Eddie Dong <eddie.dong@Intel.com>
This commit is contained in:
Jie Deng 2021-11-12 13:56:45 +08:00 committed by wenlingz
parent c4d59c8f91
commit 0b1418d395
2 changed files with 19 additions and 0 deletions
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18
hypervisor/arch/x86/guest/vm.c
View File

@ -551,6 +551,24 @@ static uint64_t lapic_pt_enabled_pcpu_bitmap(struct acrn_vm *vm)
return bitmap;
}
void prepare_vm_identical_memmap(struct acrn_vm *vm, uint16_t e820_entry_type, uint64_t prot_orig)
{
const struct e820_entry *entry;
const struct e820_entry *p_e820 = vm->e820_entries;
uint32_t entries_count = vm->e820_entry_num;
uint64_t *pml4_page = (uint64_t *)vm->arch_vm.nworld_eptp;
uint32_t i;
for (i = 0U; i < entries_count; i++) {
entry = p_e820 + i;
if (entry->type == e820_entry_type) {
ept_add_mr(vm, pml4_page, entry->baseaddr,
entry->baseaddr, entry->length,
prot_orig);
}
}
}
/**
* @pre vm_id < CONFIG_MAX_VM_NUM && vm_config != NULL && rtn_vm != NULL
* @pre vm->state == VM_POWERED_OFF

1
hypervisor/include/arch/x86/asm/guest/vm.h
View File

@ -247,6 +247,7 @@ struct acrn_vm *get_service_vm(void);
void create_service_vm_e820(struct acrn_vm *vm);
void create_prelaunched_vm_e820(struct acrn_vm *vm);
void prepare_vm_identical_memmap(struct acrn_vm *vm, uint16_t e820_entry_type, uint64_t prot_orig);
uint64_t find_space_from_ve820(struct acrn_vm *vm, uint32_t size, uint64_t min_addr, uint64_t max_addr);
int32_t prepare_os_image(struct acrn_vm *vm);