linux-kernel - [PATCH v5 09/17] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK

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Message-ID: <1457073455-11516-10-git-send-email-zhaoshenglong@huawei.com>
Date:	Fri, 4 Mar 2016 14:37:27 +0800
From:	Shannon Zhao <zhaoshenglong@...wei.com>
To:	<linux-arm-kernel@...ts.infradead.org>,
	<ard.biesheuvel@...aro.org>, <stefano.stabellini@...rix.com>,
	<david.vrabel@...rix.com>
CC:	<catalin.marinas@....com>, <will.deacon@....com>,
	<mark.rutland@....com>, <xen-devel@...ts.xen.org>,
	<devicetree@...r.kernel.org>, <linux-efi@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <shannon.zhao@...aro.org>,
	<hangaohuai@...wei.com>
Subject: [PATCH v5 09/17] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK_IRQ

From: Shannon Zhao <shannon.zhao@...aro.org>

Add a new delivery type:
val[63:56] == 3: val[15:8] is flag: val[7:0] is a PPI.
To the flag, bit 0 stands the interrupt mode is edge(1) or level(0) and
bit 1 stands the interrupt polarity is active low(1) or high(0).

Signed-off-by: Shannon Zhao <shannon.zhao@...aro.org>
Acked-by: Stefano Stabellini <stefano.stabellini@...citrix.com>
---
 include/xen/interface/hvm/params.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/xen/interface/hvm/params.h b/include/xen/interface/hvm/params.h
index 70ad208..d32b02b 100644
--- a/include/xen/interface/hvm/params.h
+++ b/include/xen/interface/hvm/params.h
@@ -53,6 +53,16 @@
  * if this delivery method is available.
  */
 
+#define HVM_PARAM_CALLBACK_TYPE_EVENT    3
+/*
+ * val[55:16] need to be zero.
+ * val[15:8] is flag of event-channel interrupt:
+ *  bit 8: interrupt is edge(1) or level(0) triggered
+ *  bit 9: interrupt is active low(1) or high(0)
+ * val[7:0] is PPI number used by event-channel.
+ * This is only used by ARM/ARM64.
+ */
+
 #define HVM_PARAM_STORE_PFN    1
 #define HVM_PARAM_STORE_EVTCHN 2
 
-- 
2.0.4