From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: kvm-ppc@vger.kernel.org, kvm@vger.kernel.org
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Subject: [PATCH v3 10/16] powerpc/xive: Add interrupt flag to disable automatic EOI
Date: Thu, 11 Jan 2018 15:34:07 +1100 [thread overview]
Message-ID: <20180111043413.22655-10-benh@kernel.crashing.org> (raw)
In-Reply-To: <20180111043413.22655-1-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:[~2018-01-11 4:35 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-11 4:33 [PATCH v3 01/16] powerpc/xive: Remove incorrect debug code Benjamin Herrenschmidt
2018-01-11 4:33 ` [PATCH v3 02/16] powerpc: Remove DEBUG define in 64-bit early setup code Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 03/16] powerpc: Reduce log level of "OPAL detected !" message Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 04/16] powerpc/kvm/xive: Add more debugfs queues info Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 05/16] powerpc/kvm/xive: Enable use of the new "single escalation" feature Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 06/16] powerpc/kvm/xive: Don't use existing "prodded" flag for xive escalations Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 07/16] powerpc/kvm/xive: Check DR not IR to chose real vs virt mode MMIOs Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 08/16] powerpc/kvm/xive: Make xive_pushed a byte, not a word Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 09/16] powerpc/xive: Move definition of ESB bits Benjamin Herrenschmidt
2018-01-11 4:34 ` Benjamin Herrenschmidt [this message]
2018-01-11 4:34 ` [PATCH v3 11/16] powerpc/kvm/xive: Keep escalation interrupt masked unless ceded Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 12/16] powerpc/kvm: Make "no_xive:" label local Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 13/16] powerpc: Use the TRAP macro whenever comparing a trap number Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 14/16] powerpc: Remove useless EXC_COMMON_HV Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 15/16] powerpc/kvm: Store the MMU mode in the PACA on KVM exit Benjamin Herrenschmidt
2018-01-11 4:34 ` [PATCH v3 16/16] powerpc/kvm: Use the PACA virt/real mode info instead of mfmsr Benjamin Herrenschmidt
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180111043413.22655-10-benh@kernel.crashing.org \
--to=benh@kernel.crashing.org \
--cc=kvm-ppc@vger.kernel.org \
--cc=kvm@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox