From mboxrd@z Thu Jan 1 00:00:00 1970 From: marc.zyngier@arm.com (Marc Zyngier) Date: Fri, 18 Dec 2015 09:16:13 +0000 Subject: [PATCH 2/2] ARM: Make IPI_CPU_BACKTRACE a "non-secure" SGI In-Reply-To: <1450430173-26992-1-git-send-email-marc.zyngier@arm.com> References: <1450430173-26992-1-git-send-email-marc.zyngier@arm.com> Message-ID: <1450430173-26992-3-git-send-email-marc.zyngier@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Having IPI_CPU_BACKTRACE as SGI15 may not work if the kernel is running in non-secure mode and that the secure firmware has decided to follow ARM's recommendations that SGI8-15 should be reserved for secure purpose. Now that we are "only" using SGI0-6, change IPI_CPU_BACKTRACE to use SGI7, which makes it more likely to work. Signed-off-by: Marc Zyngier --- arch/arm/kernel/smp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c index d50a77d..fe517f1 100644 --- a/arch/arm/kernel/smp.c +++ b/arch/arm/kernel/smp.c @@ -72,7 +72,7 @@ enum ipi_msg_type { IPI_CPU_STOP, IPI_IRQ_WORK, IPI_COMPLETION, - IPI_CPU_BACKTRACE = 15, + IPI_CPU_BACKTRACE, }; static DECLARE_COMPLETION(cpu_running); -- 2.1.4