linux-kernel - [PATCH] KVM: x86: Use VMCALL and VMMCALL mnemonics in kvm

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Message-Id: <20200623183439.5526-1-ubizjak@gmail.com>
Date:   Tue, 23 Jun 2020 20:34:39 +0200
From:   Uros Bizjak <ubizjak@...il.com>
To:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Uros Bizjak <ubizjak@...il.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Subject: [PATCH] KVM: x86: Use VMCALL and VMMCALL mnemonics in kvm_para.h

Current minimum required version of binutils is 2.23,
which supports VMCALL and VMMCALL instruction mnemonics.

Replace the byte-wise specification of VMCALL and
VMMCALL with these proper mnemonics.

Signed-off-by: Uros Bizjak <ubizjak@...il.com>
CC: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/include/asm/kvm_para.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/kvm_para.h b/arch/x86/include/asm/kvm_para.h
index 49d3a9edb06f..01317493807e 100644
--- a/arch/x86/include/asm/kvm_para.h
+++ b/arch/x86/include/asm/kvm_para.h
@@ -18,7 +18,7 @@ static inline bool kvm_check_and_clear_guest_paused(void)
 #endif /* CONFIG_KVM_GUEST */
 
 #define KVM_HYPERCALL \
-        ALTERNATIVE(".byte 0x0f,0x01,0xc1", ".byte 0x0f,0x01,0xd9", X86_FEATURE_VMMCALL)
+        ALTERNATIVE("vmcall", "vmmcall", X86_FEATURE_VMMCALL)
 
 /* For KVM hypercalls, a three-byte sequence of either the vmcall or the vmmcall
  * instruction.  The hypervisor may replace it with something else but only the
-- 
2.26.2