From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Paul Mackerras <paulus@ozlabs.org>
Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org,
Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: [PATCH v2 07/11] powerpc/xive: Add interrupt flag to disable automatic EOI
Date: Thu, 23 Nov 2017 04:36:15 +0000 [thread overview]
Message-ID: <20171123043619.15301-7-benh@kernel.crashing.org> (raw)
In-Reply-To: <20171123043619.15301-1-benh@kernel.crashing.org>
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>
---
arch/powerpc/include/asm/xive.h | 3 +++
arch/powerpc/sysdev/xive/common.c | 3 ++-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/xive.h b/arch/powerpc/include/asm/xive.h
index f786617ea8b7..e602903c3029 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 838ebdbfe4c5..40c06110821c 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);
/*
--
2.14.3
next prev parent reply other threads:[~2017-11-23 4:36 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-23 4:36 [PATCH v2 01/11] powerpc/kvm/xive: Add more debugfs queues info Benjamin Herrenschmidt
2017-11-23 4:36 ` [PATCH v2 02/11] powerpc/kvm/xive: Enable use of the new "single escalation" feature Benjamin Herrenschmidt
2017-11-23 4:36 ` [PATCH v2 03/11] powerpc/kvm/xive: Don't use existing "prodded" flag for xive escalations Benjamin Herrenschmidt
2017-11-23 4:36 ` [PATCH v2 04/11] powerpc/kvm/xive: Check DR not IR to chose real vs virt mode MMIOs Benjamin Herrenschmidt
2017-11-23 4:36 ` [PATCH v2 05/11] powerpc/kvm/xive: Make xive_pushed a byte, not a word Benjamin Herrenschmidt
2017-11-23 4:36 ` [PATCH v2 06/11] powerpc/xive: Move definition of ESB bits Benjamin Herrenschmidt
2017-11-23 4:36 ` Benjamin Herrenschmidt [this message]
2017-11-23 4:36 ` [PATCH v2 08/11] powerpc/kvm/xive: Keep escalation interrupt masked unless ceded Benjamin Herrenschmidt
2017-11-25 4:56 ` Paul Mackerras
2017-11-26 21:55 ` Benjamin Herrenschmidt
2017-11-23 4:36 ` [PATCH v2 09/11] powerpc/kvm: Make "no_xive:" label local Benjamin Herrenschmidt
2017-11-23 4:36 ` [PATCH v2 10/11] powerpc/kvm: Store the MMU mode in the PACA on KVM exit Benjamin Herrenschmidt
2017-11-24 15:15 ` kbuild test robot
2017-11-25 5:03 ` Paul Mackerras
2017-11-26 21:57 ` Benjamin Herrenschmidt
2017-11-23 4:36 ` [PATCH v2 11/11] powerpc/kvm: Use the PACA virt/real mode info instead of mfmsr Benjamin Herrenschmidt
2017-11-25 5:17 ` Paul Mackerras
2017-11-26 21:58 ` Benjamin Herrenschmidt
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