| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.14 044/107] powerpc/fsl: Add macro to flush the branch predictor | Date | Mon, 1 Apr 2019 19:01:59 +0200 |
| |
4.14-stable review patch. If anyone has any objections, please let me know.
------------------
From: Diana Craciun <diana.craciun@nxp.com>
commit 1cbf8990d79ff69da8ad09e8a3df014e1494462b upstream.
The BUCSR register can be used to invalidate the entries in the branch prediction mechanisms.
Signed-off-by: Diana Craciun <diana.craciun@nxp.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/powerpc/include/asm/ppc_asm.h | 10 ++++++++++ 1 file changed, 10 insertions(+)
--- a/arch/powerpc/include/asm/ppc_asm.h +++ b/arch/powerpc/include/asm/ppc_asm.h @@ -802,4 +802,14 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601) stringify_in_c(.long (_target) - . ;) \ stringify_in_c(.previous) +#ifdef CONFIG_PPC_FSL_BOOK3E +#define BTB_FLUSH(reg) \ + lis reg,BUCSR_INIT@h; \ + ori reg,reg,BUCSR_INIT@l; \ + mtspr SPRN_BUCSR,reg; \ + isync; +#else +#define BTB_FLUSH(reg) +#endif /* CONFIG_PPC_FSL_BOOK3E */ + #endif /* _ASM_POWERPC_PPC_ASM_H */
|