shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-06 02:50:49 +09:00
Code Issues Packages Projects Releases Wiki Activity

ANDROID: KVM: arm64: Flush nVHE hyp_vcpu memcache

Browse Source 
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>
This commit is contained in:
Vincent Donnefort
2022-10-26 17:44:14 +01:00
parent 44e9b82e01
commit e939dcfbc6
1 changed files with 9 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
arch/arm64/kvm/hyp/nvhe/pkvm.c
View File

@@ -829,6 +829,15 @@ 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));
}