diff options
Diffstat (limited to 'tools/virtio')
| -rw-r--r-- | tools/virtio/linux/compiler.h | 2 | ||||
| -rw-r--r-- | tools/virtio/linux/uaccess.h | 9 | ||||
| -rw-r--r-- | tools/virtio/ringtest/main.h | 12 | ||||
| -rwxr-xr-x | tools/virtio/ringtest/run-on-all.sh | 5 |
4 files changed, 21 insertions, 7 deletions
diff --git a/tools/virtio/linux/compiler.h b/tools/virtio/linux/compiler.h index 845960e1cbf2..c9ccfd42ec13 100644 --- a/tools/virtio/linux/compiler.h +++ b/tools/virtio/linux/compiler.h @@ -4,6 +4,6 @@ #define WRITE_ONCE(var, val) \ (*((volatile typeof(val) *)(&(var))) = (val)) -#define READ_ONCE(var) (*((volatile typeof(val) *)(&(var)))) +#define READ_ONCE(var) (*((volatile typeof(var) *)(&(var)))) #endif diff --git a/tools/virtio/linux/uaccess.h b/tools/virtio/linux/uaccess.h index 0a578fe18653..fa05d01b2c90 100644 --- a/tools/virtio/linux/uaccess.h +++ b/tools/virtio/linux/uaccess.h @@ -1,8 +1,9 @@ #ifndef UACCESS_H #define UACCESS_H -extern void *__user_addr_min, *__user_addr_max; -#define ACCESS_ONCE(x) (*(volatile typeof(x) *)&(x)) +#include <linux/compiler.h> + +extern void *__user_addr_min, *__user_addr_max; static inline void __chk_user_ptr(const volatile void *p, size_t size) { @@ -13,7 +14,7 @@ static inline void __chk_user_ptr(const volatile void *p, size_t size) ({ \ typeof(ptr) __pu_ptr = (ptr); \ __chk_user_ptr(__pu_ptr, sizeof(*__pu_ptr)); \ - ACCESS_ONCE(*(__pu_ptr)) = x; \ + WRITE_ONCE(*(__pu_ptr), x); \ 0; \ }) @@ -21,7 +22,7 @@ static inline void __chk_user_ptr(const volatile void *p, size_t size) ({ \ typeof(ptr) __pu_ptr = (ptr); \ __chk_user_ptr(__pu_ptr, sizeof(*__pu_ptr)); \ - x = ACCESS_ONCE(*(__pu_ptr)); \ + x = READ_ONCE(*(__pu_ptr)); \ 0; \ }) 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 diff --git a/tools/virtio/ringtest/run-on-all.sh b/tools/virtio/ringtest/run-on-all.sh index 2e69ca812b4c..29b0d3920bfc 100755 --- a/tools/virtio/ringtest/run-on-all.sh +++ b/tools/virtio/ringtest/run-on-all.sh @@ -1,12 +1,13 @@ #!/bin/sh +CPUS_ONLINE=$(lscpu --online -p=cpu|grep -v -e '#') #use last CPU for host. Why not the first? #many devices tend to use cpu0 by default so #it tends to be busier -HOST_AFFINITY=$(lscpu -p=cpu | tail -1) +HOST_AFFINITY=$(echo "${CPUS_ONLINE}"|tail -n 1) #run command on all cpus -for cpu in $(seq 0 $HOST_AFFINITY) +for cpu in $CPUS_ONLINE do #Don't run guest and host on same CPU #It actually works ok if using signalling |