This is a note to let you know that I've just added the patch titled [PATCH 069/135] irqchip/gic-v3: Make sure read from ICC_IAR1_EL1 is to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: 0069-irqchip-gic-v3-Make-sure-read-from-ICC_IAR1_EL1-is-v.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 2b7915f04074318e3c739d2d3efafe77b7ee211e Mon Sep 17 00:00:00 2001 From: Tirumalesh Chalamarla <tchalamarla@xxxxxxxxxxxxxxxxxx> Date: Thu, 4 Feb 2016 10:45:25 -0800 Subject: [PATCH 069/135] irqchip/gic-v3: Make sure read from ICC_IAR1_EL1 is visible on redestributor [ Upstream commit 1a1ebd5fb1e203ee8cc73508cc7a38ac4b804596 ] The ARM GICv3 specification mentions the need for dsb after a read from the ICC_IAR1_EL1 register: 4.1.1 Physical CPU Interface: The effects of reading ICC_IAR0_EL1 and ICC_IAR1_EL1 on the state of a returned INTID are not guaranteed to be visible until after the execution of a DSB. Not having this could result in missed interrupts, so let's add the required barrier. [Marc: fixed commit message] Acked-by: Marc Zyngier <marc.zyngier@xxxxxxx> Signed-off-by: Tirumalesh Chalamarla <tchalamarla@xxxxxxxxxxxxxxxxxx> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx> Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/arm64/include/asm/arch_gicv3.h | 1 + 1 file changed, 1 insertion(+) --- a/arch/arm64/include/asm/arch_gicv3.h +++ b/arch/arm64/include/asm/arch_gicv3.h @@ -103,6 +103,7 @@ static inline u64 gic_read_iar_common(vo u64 irqstat; asm volatile("mrs_s %0, " __stringify(ICC_IAR1_EL1) : "=r" (irqstat)); + dsb(sy); return irqstat; } Patches currently in stable-queue which might be from tchalamarla@xxxxxxxxxxxxxxxxxx are queue-4.4/0070-arm64-KVM-Configure-TCR_EL2.PS-at-runtime.patch queue-4.4/0069-irqchip-gic-v3-Make-sure-read-from-ICC_IAR1_EL1-is-v.patch queue-4.4/0084-ahci-Workaround-for-ThunderX-Errata-22536.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html