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| author |   Marc Zyngier <maz@kernel.org> | 2022-09-26 15:51:19 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-09-29 10:23:08 +0100 |
| commit | 4eb6486cb43c93382c27a2659ba978c660e98498 (patch) | |
| tree | 693c10306410e5b5bf19c847fbfde204d74ed732 /tools/testing/selftests/kvm | |
| parent | KVM: Document weakly ordered architecture requirements for dirty ring (diff) | |
| download | linux-dev-4eb6486cb43c93382c27a2659ba978c660e98498.tar.xz linux-dev-4eb6486cb43c93382c27a2659ba978c660e98498.zip | |
KVM: selftests: dirty-log: Upgrade flag accesses to acquire/release semantics
In order to preserve ordering, make sure that the flag accesses
in the dirty log are done using acquire/release accessors.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/r/20220926145120.27974-6-maz@kernel.org
Diffstat (limited to 'tools/testing/selftests/kvm')
| -rw-r--r-- | tools/testing/selftests/kvm/dirty_log_test.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c index 9c883c94d478..53627add8a7c 100644 --- a/tools/testing/selftests/kvm/dirty_log_test.c +++ b/tools/testing/selftests/kvm/dirty_log_test.c @@ -17,6 +17,7 @@ #include <linux/bitmap.h> #include <linux/bitops.h> #include <linux/atomic.h> +#include <asm/barrier.h> #include "kvm_util.h" #include "test_util.h" @@ -279,12 +280,12 @@ static void dirty_ring_create_vm_done(struct kvm_vm *vm) static inline bool dirty_gfn_is_dirtied(struct kvm_dirty_gfn *gfn) { - return gfn->flags == KVM_DIRTY_GFN_F_DIRTY; + return smp_load_acquire(&gfn->flags) == KVM_DIRTY_GFN_F_DIRTY; } static inline void dirty_gfn_set_collected(struct kvm_dirty_gfn *gfn) { - gfn->flags = KVM_DIRTY_GFN_F_RESET; + smp_store_release(&gfn->flags, KVM_DIRTY_GFN_F_RESET); } static uint32_t dirty_ring_collect_one(struct kvm_dirty_gfn *dirty_gfns, |