All of lore.kernel.org
 help / color / mirror / Atom feed
From: Yun Wu <wuyun.wu@huawei.com>
To: <marc.zyngier@arm.com>, <tglx@linutronix.de>, <jason@lakedaemon.net>
Cc: <linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	Yun Wu <wuyun.wu@huawei.com>
Subject: [PATCH 3/5] irqchip: gicv3-its: use 64KB page as default granule
Date: Fri, 30 Jan 2015 15:46:47 +0800	[thread overview]
Message-ID: <1422604009-9248-4-git-send-email-wuyun.wu@huawei.com> (raw)
In-Reply-To: <1422604009-9248-1-git-send-email-wuyun.wu@huawei.com>

The field of page size in register GITS_BASERn might be read-only
if an implementation only supports a single, fixed page size. But
currently the ITS driver will throw out an error when PAGE_SIZE
is less than the minimum size supported by an ITS. So addressing
this problem by using 64KB pages as default granule for all the
ITS base tables.

Signed-off-by: Yun Wu <wuyun.wu@huawei.com>
---
 drivers/irqchip/irq-gic-v3-its.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 2a08d85..430bc92 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -801,7 +801,7 @@ static int its_alloc_tables(struct its_node *its)
 	int err;
 	int i;
 	int size;
-	int psz = PAGE_SIZE;
+	int psz = SZ_64K;
 	u64 shr = GITS_BASER_InnerShareable;

 	for (i = 0; i < GITS_BASER_NR_REGS; i++) {
--
1.8.0



WARNING: multiple messages have this Message-ID (diff)
From: wuyun.wu@huawei.com (Yun Wu)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/5] irqchip: gicv3-its: use 64KB page as default granule
Date: Fri, 30 Jan 2015 15:46:47 +0800	[thread overview]
Message-ID: <1422604009-9248-4-git-send-email-wuyun.wu@huawei.com> (raw)
In-Reply-To: <1422604009-9248-1-git-send-email-wuyun.wu@huawei.com>

The field of page size in register GITS_BASERn might be read-only
if an implementation only supports a single, fixed page size. But
currently the ITS driver will throw out an error when PAGE_SIZE
is less than the minimum size supported by an ITS. So addressing
this problem by using 64KB pages as default granule for all the
ITS base tables.

Signed-off-by: Yun Wu <wuyun.wu@huawei.com>
---
 drivers/irqchip/irq-gic-v3-its.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 2a08d85..430bc92 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -801,7 +801,7 @@ static int its_alloc_tables(struct its_node *its)
 	int err;
 	int i;
 	int size;
-	int psz = PAGE_SIZE;
+	int psz = SZ_64K;
 	u64 shr = GITS_BASER_InnerShareable;

 	for (i = 0; i < GITS_BASER_NR_REGS; i++) {
--
1.8.0

  parent reply	other threads:[~2015-01-30  7:49 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-30  7:46 [PATCH 0/5] enhance configuring an ITS Yun Wu
2015-01-30  7:46 ` Yun Wu
2015-01-30  7:46 ` [PATCH 1/5] irqchip: gicv3-its: allocate proper size for DT Yun Wu
2015-01-30  7:46   ` Yun Wu
2015-01-30 19:10   ` Marc Zyngier
2015-01-30 19:10     ` Marc Zyngier
2015-01-31  1:57     ` Yun Wu (Abel)
2015-01-31  1:57       ` Yun Wu (Abel)
2015-01-30  7:46 ` [PATCH 2/5] irqchip: gicv3-its: zero itt before handling to hardware Yun Wu
2015-01-30  7:46   ` Yun Wu
2015-01-30 19:24   ` Marc Zyngier
2015-01-30 19:24     ` Marc Zyngier
2015-01-30  7:46 ` Yun Wu [this message]
2015-01-30  7:46   ` [PATCH 3/5] irqchip: gicv3-its: use 64KB page as default granule Yun Wu
2015-01-30 19:18   ` Marc Zyngier
2015-01-30 19:18     ` Marc Zyngier
2015-01-31  1:33     ` Yun Wu (Abel)
2015-01-31  1:33       ` Yun Wu (Abel)
2015-01-30  7:46 ` [PATCH 4/5] irqchip: gicv3-its: define macros for GITS_CTLR fields Yun Wu
2015-01-30  7:46   ` Yun Wu
2015-01-30  7:46 ` [PATCH 5/5] irqchip: gicv3-its: add support for power down Yun Wu
2015-01-30  7:46   ` Yun Wu
2015-01-30 19:23   ` Marc Zyngier
2015-01-30 19:23     ` Marc Zyngier
2015-01-31  1:43     ` Yun Wu (Abel)
2015-01-31  1:43       ` Yun Wu (Abel)

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=1422604009-9248-4-git-send-email-wuyun.wu@huawei.com \
    --to=wuyun.wu@huawei.com \
    --cc=jason@lakedaemon.net \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=marc.zyngier@arm.com \
    --cc=tglx@linutronix.de \
    /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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.