From: Joakim Tjernlund Date: Tue, 2 Mar 2010 05:37:10 +0000 (+0000) Subject: powerpc/8xx: Avoid testing for kernel space in ITLB Miss. X-Git-Tag: Ubuntu-snapdragon-4.4.0-1050.54~21948^2~83 X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=4afb0be7ccda0ca551cc37572bab74ba4a3c18dd;p=mirror_ubuntu-artful-kernel.git powerpc/8xx: Avoid testing for kernel space in ITLB Miss. Only modules will cause ITLB Misses as we always pin the first 8MB of kernel memory. Signed-off-by: Joakim Tjernlund Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S index ecc4a02277e3..84ca1d9b9ed3 100644 --- a/arch/powerpc/kernel/head_8xx.S +++ b/arch/powerpc/kernel/head_8xx.S @@ -318,12 +318,16 @@ InstructionTLBMiss: /* If we are faulting a kernel address, we have to use the * kernel page tables. */ +#ifdef CONFIG_MODULES + /* Only modules will cause ITLB Misses as we always + * pin the first 8MB of kernel memory */ andi. r11, r10, 0x0800 /* Address >= 0x80000000 */ beq 3f lis r11, swapper_pg_dir@h ori r11, r11, swapper_pg_dir@l rlwimi r10, r11, 0, 2, 19 3: +#endif lwz r11, 0(r10) /* Get the level 1 entry */ rlwinm. r10, r11,0,0,19 /* Extract page descriptor page address */ beq 2f /* If zero, don't try to find a pte */