diff options
| author | Paul Mackerras <paulus@samba.org> | 2013-10-15 13:43:01 +0400 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-01-09 13:14:59 +0400 |
| commit | 09548fdaf32ce77a68e7f9a8a3098c1306b04858 (patch) | |
| tree | 4f57c5c932068c4aae1ff0aba76dbde7614a73b3 /arch/powerpc/include/asm/switch_to.h | |
| parent | b1f0d94c26b64e814243b736f47e7ef40d96432c (diff) | |
| download | linux-09548fdaf32ce77a68e7f9a8a3098c1306b04858.tar.xz | |
KVM: PPC: Use load_fp/vr_state rather than load_up_fpu/altivec
The load_up_fpu and load_up_altivec functions were never intended to
be called from C, and do things like modifying the MSR value in their
callers' stack frames, which are assumed to be interrupt frames. In
addition, on 32-bit Book S they require the MMU to be off.
This makes KVM use the new load_fp_state() and load_vr_state() functions
instead of load_up_fpu/altivec. This means we can remove the assembler
glue in book3s_rmhandlers.S, and potentially fixes a bug on Book E,
where load_up_fpu was called directly from C.
Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/include/asm/switch_to.h')
| -rw-r--r-- | arch/powerpc/include/asm/switch_to.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h index 9ee12610af02..971ca336f451 100644 --- a/arch/powerpc/include/asm/switch_to.h +++ b/arch/powerpc/include/asm/switch_to.h @@ -25,10 +25,8 @@ static inline void save_tar(struct thread_struct *prev) static inline void save_tar(struct thread_struct *prev) {} #endif -extern void load_up_fpu(void); extern void enable_kernel_fp(void); extern void enable_kernel_altivec(void); -extern void load_up_altivec(struct task_struct *); extern int emulate_altivec(struct pt_regs *); extern void __giveup_vsx(struct task_struct *); extern void giveup_vsx(struct task_struct *); |