diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2018-01-12 05:39:28 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-12 07:24:44 +0300 |
| commit | 7f1c410da59090f9bb2300efebbc3b717594d64c (patch) | |
| tree | a01f0e72172aee94f076eabe6fe799e606bdc99e /arch | |
| parent | 12c1f339cd49119e39063ae67f02d936f988c079 (diff) | |
| download | linux-7f1c410da59090f9bb2300efebbc3b717594d64c.tar.xz | |
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 <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/include/asm/xive.h | 3 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xive/common.c | 3 |
2 files changed, 5 insertions, 1 deletions
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); /* |