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hv: vpci: add PCI BAR re-program address check

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In theory, guest could re-program PCI BAR address to any address. However, ACRN
hypervisor only support [0, top_address_space) EPT memory mapping. So we need to
check whether the PCI BAR re-program address is within this scope.

Tracked-On: #3475
Signed-off-by: Li, Fei1 <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Li, Fei1
2019-10-14 23:26:57 +08:00
committed by wenlingz
parent dab14856c2
commit dc1e2adaec
4 changed files with 37 additions and 11 deletions
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12
hypervisor/arch/x86/guest/ept.c
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@@ -18,6 +18,18 @@
#define ACRN_DBG_EPT 6U
bool ept_is_mr_valid(const struct acrn_vm *vm, uint64_t base, uint64_t size)
{
bool valid = true;
uint64_t end = base + size;
uint64_t top_address_space = vm->arch_vm.ept_mem_ops.info->ept.top_address_space;
if ((end <= base) || (end > top_address_space)) {
valid = false;
}
return valid;
}
void destroy_ept(struct acrn_vm *vm)
{
/* Destroy secure world */