linux-kernel - [PATCH 7/8] KVM: define __KVM_HAVE_GUEST

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Date: Wed, 31 Jan 2024 18:30:55 -0500
From: Paolo Bonzini <pbonzini@...hat.com>
To: linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org
Subject: [PATCH 7/8] KVM: define __KVM_HAVE_GUEST_DEBUG unconditionally

Since all architectures (for historical reasons) have to define
struct kvm_guest_debug_arch, and since userspace has to check
KVM_CHECK_EXTENSION(KVM_CAP_SET_GUEST_DEBUG) anyway, there is
no advantage in masking the capability #define itself.  Remove
the #define __KVM_HAVE_GUEST_DEBUG from architecture-specific
headers.

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/arm64/include/uapi/asm/kvm.h   | 1 -
 arch/powerpc/include/uapi/asm/kvm.h | 1 -
 arch/s390/include/uapi/asm/kvm.h    | 1 -
 arch/x86/include/uapi/asm/kvm.h     | 1 -
 include/uapi/linux/kvm.h            | 3 +--
 5 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h
index 9c1040dad4eb..964df31da975 100644
--- a/arch/arm64/include/uapi/asm/kvm.h
+++ b/arch/arm64/include/uapi/asm/kvm.h
@@ -37,7 +37,6 @@
 #include <asm/ptrace.h>
 #include <asm/sve_context.h>
 
-#define __KVM_HAVE_GUEST_DEBUG
 #define __KVM_HAVE_IRQ_LINE
 #define __KVM_HAVE_VCPU_EVENTS
 
diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h
index a96ef6b36bba..1691297a766a 100644
--- a/arch/powerpc/include/uapi/asm/kvm.h
+++ b/arch/powerpc/include/uapi/asm/kvm.h
@@ -28,7 +28,6 @@
 #define __KVM_HAVE_PPC_SMT
 #define __KVM_HAVE_IRQCHIP
 #define __KVM_HAVE_IRQ_LINE
-#define __KVM_HAVE_GUEST_DEBUG
 
 /* Not always available, but if it is, this is the correct offset.  */
 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h
index fee712ff1cf8..05eaf6db3ad4 100644
--- a/arch/s390/include/uapi/asm/kvm.h
+++ b/arch/s390/include/uapi/asm/kvm.h
@@ -12,7 +12,6 @@
 #include <linux/types.h>
 
 #define __KVM_S390
-#define __KVM_HAVE_GUEST_DEBUG
 
 struct kvm_s390_skeys {
 	__u64 start_gfn;
diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h
index c5e682ee7726..0ad6bda1fc39 100644
--- a/arch/x86/include/uapi/asm/kvm.h
+++ b/arch/x86/include/uapi/asm/kvm.h
@@ -42,7 +42,6 @@
 #define __KVM_HAVE_IRQ_LINE
 #define __KVM_HAVE_MSI
 #define __KVM_HAVE_USER_NMI
-#define __KVM_HAVE_GUEST_DEBUG
 #define __KVM_HAVE_MSIX
 #define __KVM_HAVE_MCE
 #define __KVM_HAVE_PIT_STATE2
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 00d5cecd057d..fd5aa4bf77f7 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -16,6 +16,11 @@
 
 #define KVM_API_VERSION 12
 
+/*
+ * Backwards-compatible definitions.
+ */
+#define __KVM_HAVE_GUEST_DEBUG
+
 /* for KVM_SET_USER_MEMORY_REGION */
 struct kvm_userspace_memory_region {
 	__u32 slot;
@@ -689,9 +690,7 @@ struct kvm_enable_cap {
 /* Bug in KVM_SET_USER_MEMORY_REGION fixed: */
 #define KVM_CAP_DESTROY_MEMORY_REGION_WORKS 21
 #define KVM_CAP_USER_NMI 22
-#ifdef __KVM_HAVE_GUEST_DEBUG
 #define KVM_CAP_SET_GUEST_DEBUG 23
-#endif
 #ifdef __KVM_HAVE_PIT
 #define KVM_CAP_REINJECT_CONTROL 24
 #endif
-- 
2.39.0