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hv: Not to destroy ept of trusty memory if it's not initialized.

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If guest reboot is issued before trusty init hypercall is issued,
we shouldn't destroy ept fo trusty memory because the ept is not
created yet.

Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yin Fengwei 2018-04-19 13:50:05 +08:00 committed by lijinxia
parent c9ce5e475b
commit adcb5ea53d
1 changed files with 9 additions and 2 deletions
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11
arch/x86/ept.c
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@ -125,8 +125,15 @@ void destroy_ept(struct vm *vm)
{
free_ept_mem(HPA2HVA(vm->arch_vm.nworld_eptp));
free_ept_mem(HPA2HVA(vm->arch_vm.m2p));
/* Destroy Secure world ept */
if (vm->sworld_control.sworld_enabled)
/*
* If secure world is initialized, destroy Secure world ept.
* There are two cases secure world is not initialized:
* - trusty is not enabled. Check sworld_enabled.
* - trusty is enabled. But not initialized yet.
* Check vm->arch_vm.sworld_eptp.
*/
if (vm->sworld_control.sworld_enabled && vm->arch_vm.sworld_eptp)
free_ept_mem(HPA2HVA(vm->arch_vm.sworld_eptp));
}