diff options
| author | Peng Fan | 2020-12-09 16:42:05 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin | 2020-12-18 16:14:30 -0500 |
| commit | 1a5514cbb09aaf694d26ef26fd6da5c5d495cc22 (patch) | |
| tree | 10461dd17d5212d0f5e57f5297e302826740982e /tools/virtio/asm/barrier.h | |
| parent | b9ca93bcd186ec4144df91c619f6084cdad500ec (diff) | |
tools/virtio: add barrier for aarch64
Add barrier for aarch64 for cross compiling, and most are from Linux Kernel.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20201209084205.24062-4-peng.fan@oss.nxp.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'tools/virtio/asm/barrier.h')
| -rw-r--r-- | tools/virtio/asm/barrier.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/tools/virtio/asm/barrier.h b/tools/virtio/asm/barrier.h index 04d563fc9b95..468435ed64e6 100644 --- a/tools/virtio/asm/barrier.h +++ b/tools/virtio/asm/barrier.h @@ -16,6 +16,16 @@ # define mb() abort() # define dma_rmb() abort() # define dma_wmb() abort() +#elif defined(__aarch64__) +#define dmb(opt) asm volatile("dmb " #opt : : : "memory") +#define virt_mb() __sync_synchronize() +#define virt_rmb() dmb(ishld) +#define virt_wmb() dmb(ishst) +#define virt_store_mb(var, value) do { WRITE_ONCE(var, value); dmb(ish); } while (0) +/* Weak barriers should be used. If not - it's a bug */ +# define mb() abort() +# define dma_rmb() abort() +# define dma_wmb() abort() #else #error Please fill in barrier macros #endif |