linux-kernel - [PATCH v2 08/16] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK

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Message-ID: <1452840929-19612-9-git-send-email-zhaoshenglong@huawei.com>
Date:	Fri, 15 Jan 2016 14:55:21 +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>, <julien.grall@...rix.com>,
	<xen-devel@...ts.xen.org>, <devicetree@...r.kernel.org>,
	<linux-efi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<shannon.zhao@...aro.org>, <peter.huangpeng@...wei.com>
Subject: [PATCH v2 08/16] 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>
---
 include/xen/interface/hvm/params.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/xen/interface/hvm/params.h b/include/xen/interface/hvm/params.h
index a6c7991..550688a 100644
--- a/include/xen/interface/hvm/params.h
+++ b/include/xen/interface/hvm/params.h
@@ -34,6 +34,11 @@
  *                  Domain = val[47:32], Bus  = val[31:16],
  *                  DevFn  = val[15: 8], IntX = val[ 1: 0]
  * val[63:56] == 2: val[7:0] is a vector number.
+ * val[63:56] == 3: val[15:8] is flag of event-channel interrupt:
+ *                      bit 0: interrupt is edge(1) or level(0) triggered
+ *                      bit 1: 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.
  * If val == 0 then CPU0 event-channel notifications are not delivered.
  */
 #define HVM_PARAM_CALLBACK_IRQ 0
-- 
2.0.4