diff options
| author | Raghavendra Rao Ananta <rananta@google.com> | 2021-10-07 23:34:29 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-10-17 11:17:20 +0100 |
| commit | 740826ec02a65a5b25335fddfe8bce4ac99c7a11 (patch) | |
| tree | 86689176540dd7f22ec708abb1b985d150e7ff24 /tools/testing/selftests/kvm/include | |
| parent | b3c79c6130bcfdb0ff3819077deaddce981a0718 (diff) | |
KVM: arm64: selftests: Add support for cpu_relax
Implement the guest helper routine, cpu_relax(), to yield
the processor to other tasks.
The function was derived from
arch/arm64/include/asm/vdso/processor.h.
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211007233439.1826892-6-rananta@google.com
Diffstat (limited to 'tools/testing/selftests/kvm/include')
| -rw-r--r-- | tools/testing/selftests/kvm/include/aarch64/processor.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/include/aarch64/processor.h b/tools/testing/selftests/kvm/include/aarch64/processor.h index 93797783abad..265054c24481 100644 --- a/tools/testing/selftests/kvm/include/aarch64/processor.h +++ b/tools/testing/selftests/kvm/include/aarch64/processor.h @@ -122,6 +122,11 @@ void vm_install_exception_handler(struct kvm_vm *vm, void vm_install_sync_handler(struct kvm_vm *vm, int vector, int ec, handler_fn handler); +static inline void cpu_relax(void) +{ + asm volatile("yield" ::: "memory"); +} + #define isb() asm volatile("isb" : : : "memory") #define dsb(opt) asm volatile("dsb " #opt : : : "memory") #define dmb(opt) asm volatile("dmb " #opt : : : "memory") |