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HV: MMIODEV: delete memory resource before add it to pre-launched VM

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If mmio resource is included in ACPI DATA e820 entry, it is will be
mapped to RAM first. Then pre-launched VM can't map mmio resource GPA
to its MMIO HPA.

Tracked-On: #6320
Signed-off-by: Tao Yuhong <yuhong.tao@intel.com>
This commit is contained in:
Tao Yuhong 2021-07-27 13:26:31 -04:00 committed by Xie, Nanlin
parent 48c070c88e
commit 2e5aa8be99
1 changed files with 4 additions and 0 deletions
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4
hypervisor/arch/x86/guest/vm.c
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@ -304,6 +304,10 @@ static void prepare_prelaunched_vm_memmap(struct acrn_vm *vm, const struct acrn_
for (i = 0U; i < MAX_MMIO_DEV_NUM; i++) {
for (j = 0; j < MMIODEV_RES_NUM; j++) {
/* If mmio resource is included in ACPI DATA e820 entry, it is already mapped to RAM
* delete this potential mapping first
*/
(void)deassign_mmio_dev(vm, &vm_config->mmiodevs[i].mmiores[j]);
(void)assign_mmio_dev(vm, &vm_config->mmiodevs[i].mmiores[j]);
}