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Message-Id: <20190415183716.189589453@linuxfoundation.org> Date: Mon, 15 Apr 2019 20:43:57 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Diana Craciun <diana.craciun@....com>, Michael Ellerman <mpe@...erman.id.au>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 4.9 33/76] powerpc/fsl: Add macro to flush the branch predictor 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@....com> Signed-off-by: Michael Ellerman <mpe@...erman.id.au> Signed-off-by: Sasha Levin <sashal@...nel.org> --- arch/powerpc/include/asm/ppc_asm.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h index 24e95be3bfaf..bbd35ba36a22 100644 --- a/arch/powerpc/include/asm/ppc_asm.h +++ b/arch/powerpc/include/asm/ppc_asm.h @@ -780,4 +780,25 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601) .long 0x2400004c /* rfid */ #endif /* !CONFIG_PPC_BOOK3E */ #endif /* __ASSEMBLY__ */ + +/* + * Helper macro for exception table entries + */ +#define EX_TABLE(_fault, _target) \ + stringify_in_c(.section __ex_table,"a";)\ + stringify_in_c(.balign 4;) \ + stringify_in_c(.long (_fault) - . ;) \ + 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 */ -- 2.19.1
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