From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ozlabs.org (ozlabs.org [103.22.144.67]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id DF23F1A0197 for ; Thu, 17 Jul 2014 15:29:47 +1000 (EST) From: Michael Ellerman To: Subject: [PATCH] powerpc: Document how we set AIL on guest kernels Date: Thu, 17 Jul 2014 15:29:45 +1000 Message-Id: <1405574985-21097-1-git-send-email-mpe@ellerman.id.au> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , I spent ten minutes scratching my head, trying to work out where we enabled relocation on interrupts for guest kernels. Expand the doco to make it clear. Signed-off-by: Michael Ellerman --- arch/powerpc/kernel/setup_64.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index ee082d771178..d600b3fe5f5c 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -201,7 +201,11 @@ static void cpu_ready_for_interrupts(void) /* Set IR and DR in PACA MSR */ get_paca()->kernel_msr = MSR_KERNEL; - /* Enable AIL if supported */ + /* + * Enable AIL if supported, and we are in hypervisor mode. If we are + * not in hypervisor mode, we enable relocation-on interrupts later + * in pSeries_setup_arch() using the H_SET_MODE hcall. + */ if (cpu_has_feature(CPU_FTR_HVMODE) && cpu_has_feature(CPU_FTR_ARCH_207S)) { unsigned long lpcr = mfspr(SPRN_LPCR); -- 1.9.1