]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/commitdiff
arm64: Do not issue IPIs for user executable ptes
authorCatalin Marinas <catalin.marinas@arm.com>
Thu, 24 Jan 2019 17:28:37 +0000 (17:28 +0000)
committerWill Deacon <will.deacon@arm.com>
Fri, 1 Feb 2019 14:06:50 +0000 (14:06 +0000)
Commit 3b8c9f1cdfc5 ("arm64: IPI each CPU after invalidating the I-cache
for kernel mappings") was aimed at fixing the I-cache invalidation for
kernel mappings. However, it inadvertently caused all cache maintenance
for user mappings via set_pte_at() -> __sync_icache_dcache() ->
sync_icache_aliases() to call kick_all_cpus_sync().

Reported-by: Shijith Thotton <sthotton@marvell.com>
Tested-by: Shijith Thotton <sthotton@marvell.com>
Reported-by: Wandun Chen <chenwandun@huawei.com>
Fixes: 3b8c9f1cdfc5 ("arm64: IPI each CPU after invalidating the I-cache for kernel mappings")
Cc: <stable@vger.kernel.org> # 4.19.x-
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/mm/flush.c

index 30695a8681074402057f1a357870760d321b950b..5c9073bace83a656e0c2b6cb64d3a5bc62b1462a 100644 (file)
@@ -33,7 +33,11 @@ void sync_icache_aliases(void *kaddr, unsigned long len)
                __clean_dcache_area_pou(kaddr, len);
                __flush_icache_all();
        } else {
-               flush_icache_range(addr, addr + len);
+               /*
+                * Don't issue kick_all_cpus_sync() after I-cache invalidation
+                * for user mappings.
+                */
+               __flush_icache_range(addr, addr + len);
        }
 }