Messages in this thread Patch in this message | | | From | "Peng Fan (OSS)" <> | Subject | [PATCH 3/3] tools/virtio: add barrier for aarch64 | Date | Wed, 9 Dec 2020 16:42:05 +0800 |
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From: Peng Fan <peng.fan@nxp.com>
Add barrier for aarch64 for cross compiling, and most are from Linux Kernel.
Signed-off-by: Peng Fan <peng.fan@nxp.com> --- tools/virtio/asm/barrier.h | 10 ++++++++++ 1 file changed, 10 insertions(+)
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 -- 2.28.0
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