On Fri, Nov 04, 2022 at 09:57:03PM -0700, Vipin Sharma wrote:
> hypercall() can be used by other hyperv tests, move it to hyperv.h.
>
> Signed-off-by: Vipin Sharma <vipinsh@xxxxxxxxxx>
> ---
> .../selftests/kvm/include/x86_64/hyperv.h | 17 +++++++++++++++++
> .../selftests/kvm/x86_64/hyperv_features.c | 17 -----------------
> 2 files changed, 17 insertions(+), 17 deletions(-)
>
> diff --git a/tools/testing/selftests/kvm/include/x86_64/hyperv.h b/tools/testing/selftests/kvm/include/x86_64/hyperv.h
> index 9d8c325af1d9..87d8d9e444f7 100644
> --- a/tools/testing/selftests/kvm/include/x86_64/hyperv.h
> +++ b/tools/testing/selftests/kvm/include/x86_64/hyperv.h
> @@ -199,4 +199,21 @@ static inline uint64_t hv_linux_guest_id(void)
> ((uint64_t)LINUX_VERSION_CODE << 16);
> }
>
> +static inline uint8_t hypercall(u64 control, vm_vaddr_t input_address,
> + vm_vaddr_t output_address, uint64_t *hv_status)
> +{
> + uint8_t vector;
> +
> + /* Note both the hypercall and the "asm safe" clobber r9-r11. */
> + asm volatile("mov %[output_address], %%r8\n\t"
> + KVM_ASM_SAFE("vmcall")
> + : "=a" (*hv_status),
> + "+c" (control), "+d" (input_address),
> + KVM_ASM_SAFE_OUTPUTS(vector)
> + : [output_address] "r"(output_address),
> + "a" (-EFAULT)
> + : "cc", "memory", "r8", KVM_ASM_SAFE_CLOBBERS);
> + return vector;
> +}
Since this function is Hyper-V specific it probably makes sense to
rename it to hyperv_hypercall() as part of moving it to library, e.g. to
differentiate it from kvm_hypercall().
> +
> #endif /* !SELFTEST_KVM_HYPERV_H */
> diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_features.c b/tools/testing/selftests/kvm/x86_64/hyperv_features.c
> index b5a42cf1ad9d..31b22ee07dfb 100644
> --- a/tools/testing/selftests/kvm/x86_64/hyperv_features.c
> +++ b/tools/testing/selftests/kvm/x86_64/hyperv_features.c
> @@ -13,23 +13,6 @@
> #include "processor.h"
> #include "hyperv.h"
>
> -static inline uint8_t hypercall(u64 control, vm_vaddr_t input_address,
> - vm_vaddr_t output_address, uint64_t *hv_status)
> -{
> - uint8_t vector;
> -
> - /* Note both the hypercall and the "asm safe" clobber r9-r11. */
> - asm volatile("mov %[output_address], %%r8\n\t"
> - KVM_ASM_SAFE("vmcall")
> - : "=a" (*hv_status),
> - "+c" (control), "+d" (input_address),
> - KVM_ASM_SAFE_OUTPUTS(vector)
> - : [output_address] "r"(output_address),
> - "a" (-EFAULT)
> - : "cc", "memory", "r8", KVM_ASM_SAFE_CLOBBERS);
> - return vector;
> -}
> -
> struct msr_data {
> uint32_t idx;
> bool available;
> --
> 2.38.1.273.g43a17bfeac-goog
>
