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| author | James Hogan <james.hogan@imgtec.com> | 2016-07-13 14:12:49 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-07-29 10:19:29 +0200 |
| commit | 8bd646e92bad56a2931ff7442aba84afc1848e66 (patch) | |
| tree | 557046353498a6d479a9041af1aade98e2c72654 /arch | |
| parent | e523f289fe4d18d509f8827f8a293e8c5e4f51a1 (diff) | |
| download | linux-stable-8bd646e92bad56a2931ff7442aba84afc1848e66.tar.gz linux-stable-8bd646e92bad56a2931ff7442aba84afc1848e66.tar.bz2 linux-stable-8bd646e92bad56a2931ff7442aba84afc1848e66.zip | |
MIPS: c-r4k: Avoid dcache flush for sigtramps
Avoid the dcache and scache flush in local_r4k_flush_cache_sigtramp() if
the icache fills straight from the dcache.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13802/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/mm/c-r4k.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 600b0ad48319..58b810e67bba 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -841,12 +841,16 @@ static void local_r4k_flush_cache_sigtramp(void *args) } R4600_HIT_CACHEOP_WAR_IMPL; - if (dc_lsize) - vaddr ? flush_dcache_line(addr & ~(dc_lsize - 1)) - : protected_writeback_dcache_line(addr & ~(dc_lsize - 1)); - if (!cpu_icache_snoops_remote_store && scache_size) - vaddr ? flush_scache_line(addr & ~(sc_lsize - 1)) - : protected_writeback_scache_line(addr & ~(sc_lsize - 1)); + if (!cpu_has_ic_fills_f_dc) { + if (dc_lsize) + vaddr ? flush_dcache_line(addr & ~(dc_lsize - 1)) + : protected_writeback_dcache_line( + addr & ~(dc_lsize - 1)); + if (!cpu_icache_snoops_remote_store && scache_size) + vaddr ? flush_scache_line(addr & ~(sc_lsize - 1)) + : protected_writeback_scache_line( + addr & ~(sc_lsize - 1)); + } if (ic_lsize) vaddr ? flush_icache_line(addr & ~(ic_lsize - 1)) : protected_flush_icache_line(addr & ~(ic_lsize - 1)); |