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hv: vm: build ept for sgx epc reource

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Build EPT entries for SGX EPC resource for VMs.
- SOS: EPC resrouce will be removed from EPT of SOS, don't support SGX virtualization for SOS.
- Non-SOS: build ept mapping for EPC resource for guest.
  Guest base address and size is specified in vm configuration.

Tracked-On: #3179
Signed-off-by: Binbin Wu <binbin.wu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Binbin Wu 2019-05-22 15:22:52 +08:00 committed by ACRN System Integration
parent c078f90d77
commit 65d437283e
1 changed files with 28 additions and 0 deletions
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28
hypervisor/arch/x86/guest/vm.c
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@ -25,6 +25,7 @@
#include <vboot.h>
#include <vboot_info.h>
#include <board.h>
#include <sgx.h>
vm_sw_loader_t vm_sw_loader;
@ -321,6 +322,7 @@ static void prepare_sos_vm_memmap(struct acrn_vm *vm)
uint64_t hv_hpa;
struct acrn_vm_config *vm_config;
uint64_t *pml4_page = (uint64_t *)vm->arch_vm.nworld_eptp;
struct epc_section* epc_secs;
const struct e820_entry *entry;
uint32_t entries_count = vm->e820_entry_num;
@ -353,6 +355,15 @@ static void prepare_sos_vm_memmap(struct acrn_vm *vm)
pr_dbg("BaseAddress: 0x%016llx length: 0x%016llx\n", entry->baseaddr, entry->length);
}
/* Unmap all platform EPC resource from SOS.
* This part has already been marked as reserved by BIOS in E820
* will cause EPT violation if sos accesses EPC resource.
*/
epc_secs = get_phys_epc();
for (i = 0U; (i < MAX_EPC_SECTIONS) && (epc_secs[i].size != 0UL); i++) {
ept_mr_del(vm, pml4_page, epc_secs[i].base, epc_secs[i].size);
}
/* unmap hypervisor itself for safety
* will cause EPT violation if sos accesses hv memory
*/
@ -367,6 +378,21 @@ static void prepare_sos_vm_memmap(struct acrn_vm *vm)
}
}
/* Add EPT mapping of EPC reource for the VM */
static void prepare_epc_vm_memmap(struct acrn_vm *vm)
{
struct epc_map* vm_epc_maps;
uint32_t i;
if (is_vsgx_supported(vm->vm_id)) {
vm_epc_maps = get_epc_mapping(vm->vm_id);
for (i = 0U; (i < MAX_EPC_SECTIONS) && (vm_epc_maps[i].size != 0UL); i++) {
ept_mr_add(vm, (uint64_t *)vm->arch_vm.nworld_eptp, vm_epc_maps[i].hpa,
vm_epc_maps[i].gpa, vm_epc_maps[i].size, EPT_RWX | EPT_WB);
}
}
}
/**
* @pre vm_id < CONFIG_MAX_VM_NUM && vm_config != NULL && rtn_vm != NULL
* @pre vm->state == VM_POWERED_OFF
@ -432,6 +458,8 @@ int32_t create_vm(uint16_t vm_id, struct acrn_vm_config *vm_config, struct acrn_
}
if (status == 0) {
prepare_epc_vm_memmap(vm);
INIT_LIST_HEAD(&vm->softirq_dev_entry_list);
spinlock_init(&vm->softirq_dev_lock);
vm->intr_inject_delay_delta = 0UL;