From 7f1c410da59090f9bb2300efebbc3b717594d64c Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Fri, 12 Jan 2018 13:39:28 +1100 Subject: powerpc/xive: Add interrupt flag to disable automatic EOI This will be used by KVM in order to keep escalation interrupts in the non-EOI (masked) state after they fire. They will be re-enabled directly in HW by KVM when needed. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/xive.h | 3 +++ arch/powerpc/sysdev/xive/common.c | 3 ++- 2 files changed, 5 insertions(+), 1 deletion(-) (limited to 'arch') diff --git a/arch/powerpc/include/asm/xive.h b/arch/powerpc/include/asm/xive.h index 0e77005cf021..b619a5585cd6 100644 --- a/arch/powerpc/include/asm/xive.h +++ b/arch/powerpc/include/asm/xive.h @@ -58,6 +58,9 @@ struct xive_irq_data { #define XIVE_IRQ_FLAG_EOI_FW 0x10 #define XIVE_IRQ_FLAG_H_INT_ESB 0x20 +/* Special flag set by KVM for excalation interrupts */ +#define XIVE_IRQ_NO_EOI 0x80 + #define XIVE_INVALID_CHIP_ID -1 /* A queue tracking structure in a CPU */ diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index a3b8d7d1316e..2547b6021e6a 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -367,7 +367,8 @@ static void xive_irq_eoi(struct irq_data *d) * EOI the source if it hasn't been disabled and hasn't * been passed-through to a KVM guest */ - if (!irqd_irq_disabled(d) && !irqd_is_forwarded_to_vcpu(d)) + if (!irqd_irq_disabled(d) && !irqd_is_forwarded_to_vcpu(d) && + !(xd->flags & XIVE_IRQ_NO_EOI)) xive_do_source_eoi(irqd_to_hwirq(d), xd); /* -- cgit