linux-kernel - [PATCH v6 26/38] KVM: selftests: Move the function doing Hyper-V hypercall to a common header

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Date:   Mon,  6 Jun 2022 10:36:43 +0200
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Michael Kelley <mikelley@...rosoft.com>,
        Siddharth Chandrasekaran <sidcha@...zon.de>,
        Yuan Yao <yuan.yao@...ux.intel.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v6 26/38] KVM: selftests: Move the function doing Hyper-V hypercall to a common header

All Hyper-V specific tests issuing hypercalls need this.

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.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