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Diffstat (limited to 'tools/testing/selftests/kvm/lib/aarch64/ucall.c')
-rw-r--r--tools/testing/selftests/kvm/lib/aarch64/ucall.c9
1 files changed, 4 insertions, 5 deletions
diff --git a/tools/testing/selftests/kvm/lib/aarch64/ucall.c b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
index e0b0164e9af8..be1d9728c4ce 100644
--- a/tools/testing/selftests/kvm/lib/aarch64/ucall.c
+++ b/tools/testing/selftests/kvm/lib/aarch64/ucall.c
@@ -73,20 +73,19 @@ void ucall_uninit(struct kvm_vm *vm)
void ucall(uint64_t cmd, int nargs, ...)
{
- struct ucall uc = {
- .cmd = cmd,
- };
+ struct ucall uc = {};
va_list va;
int i;
+ WRITE_ONCE(uc.cmd, cmd);
nargs = nargs <= UCALL_MAX_ARGS ? nargs : UCALL_MAX_ARGS;
va_start(va, nargs);
for (i = 0; i < nargs; ++i)
- uc.args[i] = va_arg(va, uint64_t);
+ WRITE_ONCE(uc.args[i], va_arg(va, uint64_t));
va_end(va);
- *ucall_exit_mmio_addr = (vm_vaddr_t)&uc;
+ WRITE_ONCE(*ucall_exit_mmio_addr, (vm_vaddr_t)&uc);
}
uint64_t get_ucall(struct kvm_vm *vm, uint32_t vcpu_id, struct ucall *uc)