linux-kernel - [PATCH v5 1/6] mips/kvm: Fix ABI for use of FPU.

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Message-Id: <1369248236-27237-2-git-send-email-ddaney.cavm@gmail.com>
Date:	Wed, 22 May 2013 11:43:51 -0700
From:	David Daney <ddaney.cavm@...il.com>
To:	linux-mips@...ux-mips.org, ralf@...ux-mips.org,
	kvm@...r.kernel.org, Sanjay Lal <sanjayl@...asys.com>,
	Gleb Natapov <gleb@...hat.com>
Cc:	linux-kernel@...r.kernel.org, David Daney <david.daney@...ium.com>
Subject: [PATCH v5 1/6] mips/kvm: Fix ABI for use of FPU.

From: David Daney <david.daney@...ium.com>

Define a non-empty struct kvm_fpu.

Signed-off-by: David Daney <david.daney@...ium.com>
---
 arch/mips/include/asm/kvm.h | 29 +++++++++++++++++++++--------
 1 file changed, 21 insertions(+), 8 deletions(-)

diff --git a/arch/mips/include/asm/kvm.h b/arch/mips/include/asm/kvm.h
index 85789ea..0e8f565 100644
--- a/arch/mips/include/asm/kvm.h
+++ b/arch/mips/include/asm/kvm.h
@@ -1,11 +1,12 @@
 /*
-* This file is subject to the terms and conditions of the GNU General Public
-* License.  See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
-* Authors: Sanjay Lal <sanjayl@...asys.com>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
+ * Copyright (C) 2013 Cavium, Inc.
+ * Authors: Sanjay Lal <sanjayl@...asys.com>
+ */
 
 #ifndef __LINUX_KVM_MIPS_H
 #define __LINUX_KVM_MIPS_H
@@ -31,8 +32,20 @@ struct kvm_regs {
 struct kvm_sregs {
 };
 
-/* for KVM_GET_FPU and KVM_SET_FPU */
+/*
+ * for KVM_GET_FPU and KVM_SET_FPU
+ *
+ * If Status[FR] is zero (32-bit FPU), the upper 32-bits of the FPRs
+ * are zero filled.
+ */
 struct kvm_fpu {
+	__u64 fpr[32];
+	__u32 fir;
+	__u32 fccr;
+	__u32 fexr;
+	__u32 fenr;
+	__u32 fcsr;
+	__u32 pad;
 };
 
 struct kvm_debug_exit_arch {
-- 
1.7.11.7

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