lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Fri, 11 Jul 2014 15:18:05 -0700 From: Leonid Yegoshin <Leonid.Yegoshin@...tec.com> To: <linux-mips@...ux-mips.org> CC: <paul.gortmaker@...driver.com>, <jchandra@...adcom.com>, <linux-kernel@...r.kernel.org>, <ralf@...ux-mips.org>, <david.daney@...ium.com> Subject: [PATCH] MIPS: bugfix: missed cache flush of TLB refill handler Commit Commit 1d40cfcd3442a53e98468cdb3e6d4d9a568d76cf Author: Ralf Baechle <ralf@...ux-mips.org> Date: Fri Jul 15 15:23:23 2005 +0000 Avoid SMP cacheflushes. This is a minor optimization of startup but will also avoid smp_call_function from doing stupid things when called from a CPU that is not yet marked online. missed an appropriate cache flush of TLB refill handler because that time it was at fixed location CAC_BASE. After years the refill handler in EBASE vector is not at that location and can be allocated in some another memory and needs I-cache sync as other TLB exception vectors. Besides that, the new function - local_flash_icache_range() was introduced to avoid SMP cacheflushes. Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@...tec.com> --- arch/mips/mm/tlbex.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/arch/mips/mm/tlbex.c b/arch/mips/mm/tlbex.c index e80e10b..661bc3d 100644 --- a/arch/mips/mm/tlbex.c +++ b/arch/mips/mm/tlbex.c @@ -429,6 +429,7 @@ static void build_r3000_tlb_refill_handler(void) (unsigned int)(p - tlb_handler)); memcpy((void *)ebase, tlb_handler, 0x80); + local_flush_icache_range(ebase, ebase + 0x80); dump_handler("r3000_tlb_refill", (u32 *)ebase, 32); } @@ -1415,6 +1416,7 @@ static void build_r4000_tlb_refill_handler(void) final_len); memcpy((void *)ebase, final_handler, 0x100); + local_flush_icache_range(ebase, ebase + 0x100); dump_handler("r4000_tlb_refill", (u32 *)ebase, 64); } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists