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| author | Halil Pasic <pasic@linux.vnet.ibm.com> | 2016-09-02 18:59:36 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2017-01-20 00:46:32 +0300 |
| commit | 47a4c49af6cc1982ce613c8ee79aab459d04c44c (patch) | |
| tree | 5be8c4aa8ac2c32d6ac76f3fed2b4cd92a5863fa /tools/virtio/ringtest | |
| parent | 21f5eda9b8671744539c8295b9df62991fffb2ce (diff) | |
| download | linux-47a4c49af6cc1982ce613c8ee79aab459d04c44c.tar.xz | |
tools/virtio/ringtest: tweaks for s390
Make ringtest work on s390 too.
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Acked-by: Sascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Diffstat (limited to 'tools/virtio/ringtest')
| -rw-r--r-- | tools/virtio/ringtest/main.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/virtio/ringtest/main.h b/tools/virtio/ringtest/main.h index 34e63cc4c572..14142faf040b 100644 --- a/tools/virtio/ringtest/main.h +++ b/tools/virtio/ringtest/main.h @@ -26,6 +26,16 @@ static inline void wait_cycles(unsigned long long cycles) #define VMEXIT_CYCLES 500 #define VMENTRY_CYCLES 500 +#elif defined(__s390x__) +static inline void wait_cycles(unsigned long long cycles) +{ + asm volatile("0: brctg %0,0b" : : "d" (cycles)); +} + +/* tweak me */ +#define VMEXIT_CYCLES 200 +#define VMENTRY_CYCLES 200 + #else static inline void wait_cycles(unsigned long long cycles) { @@ -81,6 +91,8 @@ extern unsigned ring_size; /* Is there a portable way to do this? */ #if defined(__x86_64__) || defined(__i386__) #define cpu_relax() asm ("rep; nop" ::: "memory") +#elif defined(__s390x__) +#define cpu_relax() barrier() #else #define cpu_relax() assert(0) #endif |