projects / thirdparty / kernel / stable-queue.git / blame
| Commit | Line | Data |
|---|---|---|
| 3140e7c0 GKH |
1 | From foo@baz Fri Mar 29 16:04:51 CET 2019 |
| 2 | From: Michael Ellerman <mpe@ellerman.id.au> | |
| 3 | Date: Fri, 29 Mar 2019 22:26:09 +1100 | |
| 4 | Subject: powerpc/fsl: Add macro to flush the branch predictor | |
| 5 | To: stable@vger.kernel.org, gregkh@linuxfoundation.org | |
| 6 | Cc: linuxppc-dev@ozlabs.org, diana.craciun@nxp.com, msuchanek@suse.de, christophe.leroy@c-s.fr | |
| 7 | Message-ID: <20190329112620.14489-22-mpe@ellerman.id.au> | |
| 8 | ||
| 9 | From: Diana Craciun <diana.craciun@nxp.com> | |
| 10 | ||
| 11 | commit 1cbf8990d79ff69da8ad09e8a3df014e1494462b upstream. | |
| 12 | ||
| 13 | The BUCSR register can be used to invalidate the entries in the | |
| 14 | branch prediction mechanisms. | |
| 15 | ||
| 16 | Signed-off-by: Diana Craciun <diana.craciun@nxp.com> | |
| 17 | Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> | |
| 18 | Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> | |
| 19 | --- | |
| 20 | arch/powerpc/include/asm/ppc_asm.h | 10 ++++++++++ | |
| 21 | 1 file changed, 10 insertions(+) | |
| 22 | ||
| 23 | --- a/arch/powerpc/include/asm/ppc_asm.h | |
| 24 | +++ b/arch/powerpc/include/asm/ppc_asm.h | |
| 25 | @@ -821,4 +821,14 @@ END_FTR_SECTION_IFCLR(CPU_FTR_601) | |
| 26 | stringify_in_c(.long (_target) - . ;) \ | |
| 27 | stringify_in_c(.previous) | |
| 28 | ||
| 29 | +#ifdef CONFIG_PPC_FSL_BOOK3E | |
| 30 | +#define BTB_FLUSH(reg) \ | |
| 31 | + lis reg,BUCSR_INIT@h; \ | |
| 32 | + ori reg,reg,BUCSR_INIT@l; \ | |
| 33 | + mtspr SPRN_BUCSR,reg; \ | |
| 34 | + isync; | |
| 35 | +#else | |
| 36 | +#define BTB_FLUSH(reg) | |
| 37 | +#endif /* CONFIG_PPC_FSL_BOOK3E */ | |
| 38 | + | |
| 39 | #endif /* _ASM_POWERPC_PPC_ASM_H */ |