[v2,21/29] KVM: x86: Explicitly #define the VCPU_REGS_* indices

Commit Message

Sean Christopherson Jan. 24, 2019, 5:58 p.m. UTC

Declaring the VCPU_REGS_* as enums allows for more robust C code, but it
prevents using the values in assembly files.  Expliciting #define the
indices in an asm-friendly file to prepare for VMX moving its transition
code to a proper assembly file, but keep the enums for general usage.

Signed-off-by: Sean Christopherson <[e-mail]>
---
 arch/x86/include/asm/kvm_host.h      | 33 ++++++++++++++--------------
 arch/x86/include/asm/kvm_vcpu_regs.h | 25 +++++++++++++++++++++
 2 files changed, 42 insertions(+), 16 deletions(-)
 create mode 100644 arch/x86/include/asm/kvm_vcpu_regs.h

Patch

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 49f449f56434..b157d87b105b 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -35,6 +35,7 @@ 
 #include <asm/msr-index.h>
 #include <asm/asm.h>
 #include <asm/kvm_page_track.h>
+#include <asm/kvm_vcpu_regs.h>
 #include <asm/hyperv-tlfs.h>
 
 #define KVM_MAX_VCPUS 288
@@ -138,23 +139,23 @@  static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
 #define ASYNC_PF_PER_VCPU (1 << ASYNC_PF_PER_VCPU_ORDER)
 
 enum kvm_reg {
-	VCPU_REGS_RAX = 0,
-	VCPU_REGS_RCX = 1,
-	VCPU_REGS_RDX = 2,
-	VCPU_REGS_RBX = 3,
-	VCPU_REGS_RSP = 4,
-	VCPU_REGS_RBP = 5,
-	VCPU_REGS_RSI = 6,
-	VCPU_REGS_RDI = 7,
+	VCPU_REGS_RAX = __VCPU_REGS_RAX,
+	VCPU_REGS_RCX = __VCPU_REGS_RCX,
+	VCPU_REGS_RDX = __VCPU_REGS_RDX,
+	VCPU_REGS_RBX = __VCPU_REGS_RBX,
+	VCPU_REGS_RSP = __VCPU_REGS_RSP,
+	VCPU_REGS_RBP = __VCPU_REGS_RBP,
+	VCPU_REGS_RSI = __VCPU_REGS_RSI,
+	VCPU_REGS_RDI = __VCPU_REGS_RDI,
 #ifdef CONFIG_X86_64
-	VCPU_REGS_R8 = 8,
-	VCPU_REGS_R9 = 9,
-	VCPU_REGS_R10 = 10,
-	VCPU_REGS_R11 = 11,
-	VCPU_REGS_R12 = 12,
-	VCPU_REGS_R13 = 13,
-	VCPU_REGS_R14 = 14,
-	VCPU_REGS_R15 = 15,
+	VCPU_REGS_R8  = __VCPU_REGS_R8,
+	VCPU_REGS_R9  = __VCPU_REGS_R9,
+	VCPU_REGS_R10 = __VCPU_REGS_R10,
+	VCPU_REGS_R11 = __VCPU_REGS_R11,
+	VCPU_REGS_R12 = __VCPU_REGS_R12,
+	VCPU_REGS_R13 = __VCPU_REGS_R13,
+	VCPU_REGS_R14 = __VCPU_REGS_R14,
+	VCPU_REGS_R15 = __VCPU_REGS_R15,
 #endif
 	VCPU_REGS_RIP,
 	NR_VCPU_REGS
diff --git a/arch/x86/include/asm/kvm_vcpu_regs.h b/arch/x86/include/asm/kvm_vcpu_regs.h
new file mode 100644
index 000000000000..1af2cb59233b
--- /dev/null
+++ b/arch/x86/include/asm/kvm_vcpu_regs.h
@@ -0,0 +1,25 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_KVM_VCPU_REGS_H
+#define _ASM_X86_KVM_VCPU_REGS_H
+
+#define __VCPU_REGS_RAX  0
+#define __VCPU_REGS_RCX  1
+#define __VCPU_REGS_RDX  2
+#define __VCPU_REGS_RBX  3
+#define __VCPU_REGS_RSP  4
+#define __VCPU_REGS_RBP  5
+#define __VCPU_REGS_RSI  6
+#define __VCPU_REGS_RDI  7
+
+#ifdef CONFIG_X86_64
+#define __VCPU_REGS_R8   8
+#define __VCPU_REGS_R9   9
+#define __VCPU_REGS_R10 10
+#define __VCPU_REGS_R11 11
+#define __VCPU_REGS_R12 12
+#define __VCPU_REGS_R13 13
+#define __VCPU_REGS_R14 14
+#define __VCPU_REGS_R15 15
+#endif
+
+#endif /* _ASM_X86_KVM_VCPU_REGS_H */