linux-kernel - [PATCH v4 01/21] KVM: arm64: Introduce template for inline functions

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Date:   Sun, 15 Aug 2021 08:13:32 +0800
From:   Gavin Shan <gshan@...hat.com>
To:     kvmarm@...ts.cs.columbia.edu
Cc:     linux-kernel@...r.kernel.org, james.morse@....com,
        mark.rutland@....com, Jonathan.Cameron@...wei.com, will@...nel.org,
        maz@...nel.org, pbonzini@...hat.com
Subject: [PATCH v4 01/21] KVM: arm64: Introduce template for inline functions

The inline functions used to get the SMCCC parameters have same
layout. It means these functions can be presented by a template,
to make the code simplified. Besides, this adds more similar inline
functions like smccc_get_arg{4,5,6,7,8}() to visit more SMCCC arguments,
which are needed by SDEI virtualization support.

Signed-off-by: Gavin Shan <gshan@...hat.com>
---
 include/kvm/arm_hypercalls.h | 34 +++++++++++++++-------------------
 1 file changed, 15 insertions(+), 19 deletions(-)

diff --git a/include/kvm/arm_hypercalls.h b/include/kvm/arm_hypercalls.h
index 0e2509d27910..ebecb6c68254 100644
--- a/include/kvm/arm_hypercalls.h
+++ b/include/kvm/arm_hypercalls.h
@@ -6,27 +6,21 @@
 
 #include <asm/kvm_emulate.h>
 
-int kvm_hvc_call_handler(struct kvm_vcpu *vcpu);
-
-static inline u32 smccc_get_function(struct kvm_vcpu *vcpu)
-{
-	return vcpu_get_reg(vcpu, 0);
+#define SMCCC_DECLARE_GET_FUNC(type, name, reg)			\
+static inline type smccc_get_##name(struct kvm_vcpu *vcpu)	\
+{								\
+	return vcpu_get_reg(vcpu, reg);				\
 }
 
-static inline unsigned long smccc_get_arg1(struct kvm_vcpu *vcpu)
-{
-	return vcpu_get_reg(vcpu, 1);
-}
-
-static inline unsigned long smccc_get_arg2(struct kvm_vcpu *vcpu)
-{
-	return vcpu_get_reg(vcpu, 2);
-}
-
-static inline unsigned long smccc_get_arg3(struct kvm_vcpu *vcpu)
-{
-	return vcpu_get_reg(vcpu, 3);
-}
+SMCCC_DECLARE_GET_FUNC(u32,           function, 0)
+SMCCC_DECLARE_GET_FUNC(unsigned long, arg1,     1)
+SMCCC_DECLARE_GET_FUNC(unsigned long, arg2,     2)
+SMCCC_DECLARE_GET_FUNC(unsigned long, arg3,     3)
+SMCCC_DECLARE_GET_FUNC(unsigned long, arg4,     4)
+SMCCC_DECLARE_GET_FUNC(unsigned long, arg5,     5)
+SMCCC_DECLARE_GET_FUNC(unsigned long, arg6,     6)
+SMCCC_DECLARE_GET_FUNC(unsigned long, arg7,     7)
+SMCCC_DECLARE_GET_FUNC(unsigned long, arg8,     8)
 
 static inline void smccc_set_retval(struct kvm_vcpu *vcpu,
 				    unsigned long a0,
@@ -40,4 +34,6 @@ static inline void smccc_set_retval(struct kvm_vcpu *vcpu,
 	vcpu_set_reg(vcpu, 3, a3);
 }
 
+int kvm_hvc_call_handler(struct kvm_vcpu *vcpu);
+
 #endif
-- 
2.23.0