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ANDROID: KVM: arm64: Flush nVHE hyp_vcpu memcache

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When using nVHE in protected mode, the host donates pages through an arch
specific memcache the hyp can then pours in its local vcpu copy. The latter
should be flushed on VM teardown.

Bug: 237506543
Change-Id: Ic37d794ac33e9f844fa6ae1b4943febcdad5b033
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Signed-off-by: Quentin Perret <qperret@google.com>
This commit is contained in:
Vincent Donnefort
2022-10-26 17:44:14 +01:00
committed by Quentin Perret
parent 4a477ac0a9
commit bf76ea0a21
1 changed files with 9 additions and 0 deletions
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9
arch/arm64/kvm/hyp/nvhe/pkvm.c
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@@ -830,6 +830,15 @@ int __pkvm_teardown_vm(pkvm_handle_t handle)
for (idx = 0; idx < hyp_vm->nr_vcpus; ++idx) {
struct pkvm_hyp_vcpu *hyp_vcpu = hyp_vm->vcpus[idx];
struct kvm_hyp_memcache *vcpu_mc;
void *addr;
vcpu_mc = &hyp_vcpu->vcpu.arch.pkvm_memcache;
while (vcpu_mc->nr_pages) {
addr = pop_hyp_memcache(vcpu_mc, hyp_phys_to_virt);
push_hyp_memcache(mc, addr, hyp_virt_to_phys);
unmap_donated_memory_noclear(addr, PAGE_SIZE);
}
teardown_donated_memory(mc, hyp_vcpu, sizeof(*hyp_vcpu));
}