[PATCH v4 25/37] KVM: selftests: Move the function doing Hyper-V hypercall to a common header

Vitaly Kuznetsov
2022-05-25T09:06:59Z

All Hyper-V specific tests issuing hypercalls need this.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
.../selftests/kvm/include/x86_64/hyperv.h | 15 +++++++++++++++
.../selftests/kvm/x86_64/hyperv_features.c | 17 +----------------
2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/tools/testing/selftests/kvm/include/x86_64/hyperv.h b/tools/testing/selftests/kvm/include/x86_64/hyperv.h
index f0a8a93694b2..e0a1b4c2fbbc 100644
--- a/tools/testing/selftests/kvm/include/x86_64/hyperv.h
+++ b/tools/testing/selftests/kvm/include/x86_64/hyperv.h
@@ -185,6 +185,21 @@
/* hypercall options */
#define HV_HYPERCALL_FAST_BIT BIT(16)

+static inline u64 hyperv_hypercall(u64 control, vm_vaddr_t input_address,
+ vm_vaddr_t output_address)
+{
+ u64 hv_status;
+
+ asm volatile("mov %3, %%r8\n"
+ "vmcall"
+ : "=a" (hv_status),
+ "+c" (control), "+d" (input_address)
+ : "r" (output_address)
+ : "cc", "memory", "r8", "r9", "r10", "r11");
+
+ return hv_status;
+}
+
/* Proper HV_X64_MSR_GUEST_OS_ID value */
#define HYPERV_LINUX_OS_ID ((u64)0x8100 << 48)

diff --git a/tools/testing/selftests/kvm/x86_64/hyperv_features.c b/tools/testing/selftests/kvm/x86_64/hyperv_features.c
index 98c020356925..788d570e991e 100644
--- a/tools/testing/selftests/kvm/x86_64/hyperv_features.c
+++ b/tools/testing/selftests/kvm/x86_64/hyperv_features.c
@@ -48,21 +48,6 @@ static void do_wrmsr(u32 idx, u64 val)
static int nr_gp;
static int nr_ud;

-static inline u64 hypercall(u64 control, vm_vaddr_t input_address,
- vm_vaddr_t output_address)
-{
- u64 hv_status;
-
- asm volatile("mov %3, %%r8\n"
- "vmcall"
- : "=a" (hv_status),
- "+c" (control), "+d" (input_address)
- : "r" (output_address)
- : "cc", "memory", "r8", "r9", "r10", "r11");
-
- return hv_status;
-}
-
static void guest_gp_handler(struct ex_regs *regs)
{
unsigned char *rip = (unsigned char *)regs->rip;
@@ -138,7 +123,7 @@ static void guest_hcall(vm_vaddr_t pgs_gpa, struct hcall_data *hcall)
input = output = 0;
}

- res = hypercall(hcall->control, input, output);
+ res = hyperv_hypercall(hcall->control, input, output);
if (hcall->ud_expected)
GUEST_ASSERT(nr_ud == 1);
else
--
2.35.3