diff options
| author | Oliver Upton <oupton@google.com> | 2021-09-21 17:11:21 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-09-22 10:33:08 -0400 |
| commit | 01f91acb55be7aac3950b89c458bcea9ef6e4f49 (patch) | |
| tree | 28074cbca8e0033f8762fe66ae7b5d53542b2b52 /tools/testing | |
| parent | 90b54129e8df909ccca527b2d69bcb1f0216aa8f (diff) | |
selftests: KVM: Align SMCCC call with the spec in steal_time
The SMC64 calling convention passes a function identifier in w0 and its
parameters in x1-x17. Given this, there are two deviations in the
SMC64 call performed by the steal_time test: the function identifier is
assigned to a 64 bit register and the parameter is only 32 bits wide.
Align the call with the SMCCC by using a 32 bit register to handle the
function identifier and increasing the parameter width to 64 bits.
Suggested-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Oliver Upton <oupton@google.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Message-Id: <20210921171121.2148982-3-oupton@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/kvm/steal_time.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/tools/testing/selftests/kvm/steal_time.c b/tools/testing/selftests/kvm/steal_time.c index ecec30865a74..aafaa8e38b7c 100644 --- a/tools/testing/selftests/kvm/steal_time.c +++ b/tools/testing/selftests/kvm/steal_time.c @@ -118,12 +118,12 @@ struct st_time { uint64_t st_time; }; -static int64_t smccc(uint32_t func, uint32_t arg) +static int64_t smccc(uint32_t func, uint64_t arg) { unsigned long ret; asm volatile( - "mov x0, %1\n" + "mov w0, %w1\n" "mov x1, %2\n" "hvc #0\n" "mov %0, x0\n" |