[patch 25/31] x86/fpu: Move mxcsr related code to core

Thomas Gleixner
2021-10-12T00:06:40Z

No need to expose that to code which only needs the XCR0 accessors.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/include/asm/fpu/xcr.h | 11 -----------
arch/x86/kernel/fpu/init.c | 1 +
arch/x86/kernel/fpu/legacy.h | 7 +++++++
arch/x86/kernel/fpu/regset.c | 1 +
arch/x86/kernel/fpu/xstate.c | 3 ++-
arch/x86/kvm/svm/sev.c | 2 +-
6 files changed, 12 insertions(+), 13 deletions(-)

--- a/arch/x86/include/asm/fpu/xcr.h
+++ b/arch/x86/include/asm/fpu/xcr.h
@@ -2,17 +2,6 @@
#ifndef _ASM_X86_FPU_XCR_H
#define _ASM_X86_FPU_XCR_H

-/*
- * MXCSR and XCR definitions:
- */
-
-static inline void ldmxcsr(u32 mxcsr)
-{
- asm volatile("ldmxcsr %0" :: "m" (mxcsr));
-}
-
-extern unsigned int mxcsr_feature_mask;
-
#define XCR_XFEATURE_ENABLED_MASK 0x00000000

static inline u64 xgetbv(u32 index)
--- a/arch/x86/kernel/fpu/init.c
+++ b/arch/x86/kernel/fpu/init.c
@@ -11,6 +11,7 @@
#include <linux/init.h>

#include "internal.h"
+#include "legacy.h"

/*
* Initialize the registers found in all CPUs, CR0 and CR4:
--- a/arch/x86/kernel/fpu/legacy.h
+++ b/arch/x86/kernel/fpu/legacy.h
@@ -4,6 +4,13 @@

#include <asm/fpu/types.h>

+extern unsigned int mxcsr_feature_mask;
+
+static inline void ldmxcsr(u32 mxcsr)
+{
+ asm volatile("ldmxcsr %0" :: "m" (mxcsr));
+}
+
/*
* Returns 0 on success or the trap number when the operation raises an
* exception.
--- a/arch/x86/kernel/fpu/regset.c
+++ b/arch/x86/kernel/fpu/regset.c
@@ -12,6 +12,7 @@

#include "context.h"
#include "internal.h"
+#include "legacy.h"

/*
* The xstateregs_active() routine is the same as the regset_fpregs_active() routine,
--- a/arch/x86/kernel/fpu/xstate.c
+++ b/arch/x86/kernel/fpu/xstate.c
@@ -14,8 +14,9 @@

#include <asm/fpu/api.h>
#include <asm/fpu/internal.h>
-#include <asm/fpu/signal.h>
#include <asm/fpu/regset.h>
+#include <asm/fpu/signal.h>
+#include <asm/fpu/xcr.h>

#include <asm/tlbflush.h>

--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -17,10 +17,10 @@
#include <linux/misc_cgroup.h>
#include <linux/processor.h>
#include <linux/trace_events.h>
-#include <asm/fpu/internal.h>

#include <asm/pkru.h>
#include <asm/trapnr.h>
+#include <asm/fpu/xcr.h>

#include "x86.h"
#include "svm.h"