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From: Andrew Jones <drjones@redhat.com>
To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu
Cc: maz@kernel.org, pbonzini@redhat.com, steven.price@arm.com
Subject: [PATCH v2 3/6] KVM: arm64: Drop type input from kvm_put_guest
Date: Tue,  4 Aug 2020 19:06:01 +0200	[thread overview]
Message-ID: <20200804170604.42662-4-drjones@redhat.com> (raw)
In-Reply-To: <20200804170604.42662-1-drjones@redhat.com>

We can use typeof() to avoid the need for the type input.

Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Andrew Jones <drjones@redhat.com>
---
 arch/arm64/kvm/pvtime.c  |  2 +-
 include/linux/kvm_host.h | 11 ++++++-----
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index 95f9580275b1..241ded7ee0ad 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -32,7 +32,7 @@ void kvm_update_stolen_time(struct kvm_vcpu *vcpu)
 	steal_le = cpu_to_le64(steal);
 	idx = srcu_read_lock(&kvm->srcu);
 	offset = offsetof(struct pvclock_vcpu_stolen_time, stolen_time);
-	kvm_put_guest(kvm, base + offset, steal_le, u64);
+	kvm_put_guest(kvm, base + offset, steal_le);
 	srcu_read_unlock(&kvm->srcu, idx);
 }
 
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index d564855243d8..cf51b06a5edd 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -749,25 +749,26 @@ int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 			      gpa_t gpa, unsigned long len);
 
-#define __kvm_put_guest(kvm, gfn, offset, value, type)			\
+#define __kvm_put_guest(kvm, gfn, offset, v)				\
 ({									\
 	unsigned long __addr = gfn_to_hva(kvm, gfn);			\
-	type __user *__uaddr = (type __user *)(__addr + offset);	\
+	typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset);	\
 	int __ret = -EFAULT;						\
 									\
 	if (!kvm_is_error_hva(__addr))					\
-		__ret = put_user(value, __uaddr);			\
+		__ret = put_user(v, __uaddr);				\
 	if (!__ret)							\
 		mark_page_dirty(kvm, gfn);				\
 	__ret;								\
 })
 
-#define kvm_put_guest(kvm, gpa, value, type)				\
+#define kvm_put_guest(kvm, gpa, v)					\
 ({									\
 	gpa_t __gpa = gpa;						\
 	struct kvm *__kvm = kvm;					\
+									\
 	__kvm_put_guest(__kvm, __gpa >> PAGE_SHIFT,			\
-			offset_in_page(__gpa), (value), type);		\
+			offset_in_page(__gpa), v);			\
 })
 
 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
-- 
2.25.4

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WARNING: multiple messages have this Message-ID (diff)
From: Andrew Jones <drjones@redhat.com>
To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu
Cc: maz@kernel.org, steven.price@arm.com, pbonzini@redhat.com
Subject: [PATCH v2 3/6] KVM: arm64: Drop type input from kvm_put_guest
Date: Tue,  4 Aug 2020 19:06:01 +0200	[thread overview]
Message-ID: <20200804170604.42662-4-drjones@redhat.com> (raw)
In-Reply-To: <20200804170604.42662-1-drjones@redhat.com>

We can use typeof() to avoid the need for the type input.

Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Andrew Jones <drjones@redhat.com>
---
 arch/arm64/kvm/pvtime.c  |  2 +-
 include/linux/kvm_host.h | 11 ++++++-----
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c
index 95f9580275b1..241ded7ee0ad 100644
--- a/arch/arm64/kvm/pvtime.c
+++ b/arch/arm64/kvm/pvtime.c
@@ -32,7 +32,7 @@ void kvm_update_stolen_time(struct kvm_vcpu *vcpu)
 	steal_le = cpu_to_le64(steal);
 	idx = srcu_read_lock(&kvm->srcu);
 	offset = offsetof(struct pvclock_vcpu_stolen_time, stolen_time);
-	kvm_put_guest(kvm, base + offset, steal_le, u64);
+	kvm_put_guest(kvm, base + offset, steal_le);
 	srcu_read_unlock(&kvm->srcu, idx);
 }
 
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index d564855243d8..cf51b06a5edd 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -749,25 +749,26 @@ int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
 			      gpa_t gpa, unsigned long len);
 
-#define __kvm_put_guest(kvm, gfn, offset, value, type)			\
+#define __kvm_put_guest(kvm, gfn, offset, v)				\
 ({									\
 	unsigned long __addr = gfn_to_hva(kvm, gfn);			\
-	type __user *__uaddr = (type __user *)(__addr + offset);	\
+	typeof(v) __user *__uaddr = (typeof(__uaddr))(__addr + offset);	\
 	int __ret = -EFAULT;						\
 									\
 	if (!kvm_is_error_hva(__addr))					\
-		__ret = put_user(value, __uaddr);			\
+		__ret = put_user(v, __uaddr);				\
 	if (!__ret)							\
 		mark_page_dirty(kvm, gfn);				\
 	__ret;								\
 })
 
-#define kvm_put_guest(kvm, gpa, value, type)				\
+#define kvm_put_guest(kvm, gpa, v)					\
 ({									\
 	gpa_t __gpa = gpa;						\
 	struct kvm *__kvm = kvm;					\
+									\
 	__kvm_put_guest(__kvm, __gpa >> PAGE_SHIFT,			\
-			offset_in_page(__gpa), (value), type);		\
+			offset_in_page(__gpa), v);			\
 })
 
 int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
-- 
2.25.4


  parent reply	other threads:[~2020-08-04 17:06 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-04 17:05 [PATCH v2 0/6] KVM: arm64: pvtime: Fixes and a new cap Andrew Jones
2020-08-04 17:05 ` Andrew Jones
2020-08-04 17:05 ` [PATCH v2 1/6] KVM: arm64: pvtime: steal-time is only supported when configured Andrew Jones
2020-08-04 17:05   ` Andrew Jones
2020-08-04 17:06 ` [PATCH v2 2/6] KVM: arm64: pvtime: Fix potential loss of stolen time Andrew Jones
2020-08-04 17:06   ` Andrew Jones
2020-08-04 17:06 ` Andrew Jones [this message]
2020-08-04 17:06   ` [PATCH v2 3/6] KVM: arm64: Drop type input from kvm_put_guest Andrew Jones
2020-08-04 17:06 ` [PATCH v2 4/6] KVM: arm64: pvtime: Fix stolen time accounting across migration Andrew Jones
2020-08-04 17:06   ` Andrew Jones
2020-08-04 17:06 ` [PATCH v2 5/6] KVM: Documentation: Minor fixups Andrew Jones
2020-08-04 17:06   ` Andrew Jones
2020-08-04 17:06 ` [PATCH v2 6/6] arm64/x86: KVM: Introduce steal-time cap Andrew Jones
2020-08-04 17:06   ` Andrew Jones
2020-08-05 15:37 ` [PATCH v2 0/6] KVM: arm64: pvtime: Fixes and a new cap Steven Price
2020-08-05 15:37   ` Steven Price
2020-08-19 12:50 ` Andrew Jones
2020-08-19 12:50   ` Andrew Jones
2020-08-21 13:04   ` Marc Zyngier
2020-08-21 13:04     ` Marc Zyngier

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