linux-kernel - [PATCH v4 02/12] KVM: define common KVM_GUESTDBG_USE_SW/HW

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Date:	Fri, 15 May 2015 15:27:05 +0100
From:	Alex Bennée <alex.bennee@...aro.org>
To:	kvm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kvmarm@...ts.cs.columbia.edu, christoffer.dall@...aro.org,
	marc.zyngier@....com, peter.maydell@...aro.org, agraf@...e.de,
	drjones@...hat.com, pbonzini@...hat.com, zhichao.huang@...aro.org
Cc:	jan.kiszka@...mens.com, dahi@...ux.vnet.ibm.com,
	r65777@...escale.com, bp@...e.de,
	Alex Bennée <alex.bennee@...aro.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Paul Mackerras <paulus@...ba.org>,
	Michael Ellerman <mpe@...erman.id.au>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	linux390@...ibm.com (supporter:S390),
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	x86@...nel.org (maintainer:X86 ARCHITECTURE...),
	Gleb Natapov <gleb@...nel.org>,
	Bharat Bhushan <Bharat.Bhushan@...escale.com>,
	Alexey Kardashevskiy <aik@...abs.ru>,
	Mihai Caraman <mihai.caraman@...escale.com>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	Cornelia Huck <cornelia.huck@...ibm.com>,
	Michael Mueller <mimu@...ux.vnet.ibm.com>,
	Eric Farman <farman@...ux.vnet.ibm.com>,
	Dominik Dingel <dingel@...ux.vnet.ibm.com>,
	Tony Krowiak <akrowiak@...ux.vnet.ibm.com>,
	"Jason J. Herne" <jjherne@...ux.vnet.ibm.com>,
	Nadav Amit <namit@...technion.ac.il>,
	linuxppc-dev@...ts.ozlabs.org (open list:LINUX FOR POWERPC...),
	linux-kernel@...r.kernel.org (open list),
	linux-s390@...r.kernel.org (open list:S390),
	linux-api@...r.kernel.org (open list:ABI/API)
Subject: [PATCH v4 02/12] KVM: define common KVM_GUESTDBG_USE_SW/HW_BP bits

Currently x86, powerpc and soon arm64 use the same two architecture
specific bits for guest debug support for software and hardware
breakpoints. This makes the shared values explicit.

Signed-off-by: Alex Bennée <alex.bennee@...aro.org>
Reviewed-by: Andrew Jones <drjones@...hat.com>

-
v4
  - claim more bits for the common functionality
v5
  - don't use __ mechanism to move values common

diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h
index ab4d473..6ea24a5 100644
--- a/arch/powerpc/include/uapi/asm/kvm.h
+++ b/arch/powerpc/include/uapi/asm/kvm.h
@@ -307,11 +307,9 @@ struct kvm_guest_debug_arch {
 /* Debug related defines */
 /*
  * kvm_guest_debug->control is a 32 bit field. The lower 16 bits are generic
- * and upper 16 bits are architecture specific. Architecture specific defines
+ * and upper 14 bits are architecture specific. Architecture specific defines
  * that ioctl is for setting hardware breakpoint or software breakpoint.
  */
-#define KVM_GUESTDBG_USE_SW_BP		0x00010000
-#define KVM_GUESTDBG_USE_HW_BP		0x00020000
 
 /* definition of registers in kvm_run */
 struct kvm_sync_regs {
diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h
index ef1a5fc..aca4f86 100644
--- a/arch/s390/include/uapi/asm/kvm.h
+++ b/arch/s390/include/uapi/asm/kvm.h
@@ -114,8 +114,6 @@ struct kvm_fpu {
 	__u64 fprs[16];
 };
 
-#define KVM_GUESTDBG_USE_HW_BP		0x00010000
-
 #define KVM_HW_BP			1
 #define KVM_HW_WP_WRITE			2
 #define KVM_SINGLESTEP			4
diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h
index d7dcef5..ca51d4c 100644
--- a/arch/x86/include/uapi/asm/kvm.h
+++ b/arch/x86/include/uapi/asm/kvm.h
@@ -250,8 +250,6 @@ struct kvm_debug_exit_arch {
 	__u64 dr7;
 };
 
-#define KVM_GUESTDBG_USE_SW_BP		0x00010000
-#define KVM_GUESTDBG_USE_HW_BP		0x00020000
 #define KVM_GUESTDBG_INJECT_DB		0x00040000
 #define KVM_GUESTDBG_INJECT_BP		0x00080000
 
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 70ac641..7c5dd11 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -570,8 +570,10 @@ struct kvm_s390_irq_state {
 
 /* for KVM_SET_GUEST_DEBUG */
 
-#define KVM_GUESTDBG_ENABLE		0x00000001
-#define KVM_GUESTDBG_SINGLESTEP		0x00000002
+#define KVM_GUESTDBG_ENABLE		(1 << 0)
+#define KVM_GUESTDBG_SINGLESTEP	(1 << 1)
+#define KVM_GUESTDBG_USE_SW_BP		(1 << 16)
+#define KVM_GUESTDBG_USE_HW_BP		(1 << 17)
 
 struct kvm_guest_debug {
 	__u32 control;
-- 
2.3.5

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