Serial can be disabled by a simple change:
diff -r 2e5d4e459c1c buildconfigs/linux-defconfig_xen_ia64
--- a/buildconfigs/linux-defconfig_xen_ia64 Sun May 21 07:31:02 2006 -0600
+++ b/buildconfigs/linux-defconfig_xen_ia64 Mon May 22 15:06:00 2006 +0800
@@ -98,6 +98,7 @@ CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_XEN_BACKEND=y
CONFIG_XEN_BLKDEV_BACKEND=y
+CONFIG_XEN_DISABLE_SERIAL=y
CONFIG_XEN_SYSFS=y
CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
CONFIG_DMA_IS_DMA32=y
@@ -1544,4 +1545,3 @@ CONFIG_CRYPTO_DES=y
# XEN
#
# CONFIG_XEN_UNPRIVILEGED_GUEST is not set
-# CONFIG_XEN_DISABLE_SERIAL is not set
But I'm not sure why I have to set option to be 'yes' explicitly:
config XEN_DISABLE_SERIAL
bool Disable serial port drivers
default y
So after making oldconfig, this option should be enabled automatically.
Does I misunderstand the logic behind? :-(
Thanks,
Kevin
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
Tian, Kevin
Sent: 2006年5月22日 14:53
To: Isaku Yamahata
Cc: xen-ia64-devel@lists.xensource.com
Subject: RE: [Xen-ia64-devel] [PATCH 0/6] Add full evtchn mechanism
forxen/ia64
From: Isaku Yamahata [mailto:[EMAIL PROTECTED]
Sent: 2006年5月22日 13:43
On Mon, May 22, 2006 at 12:53:11PM +0800, Tian, Kevin wrote:
Why is serial
required to be disabled in dom0? What's policy to choose which serial
to be disabled, if there're multiple serial ports with different type?
In fact I'm not sure about the policy.
Since xenLinux/x86 defines CONFIG_XEN_DISABLE_SERIAL=y, I
thought
it was the xen's policy. However I'm not sure whether it's right.
It seemed that you used serial port from dom0, I wanted to confirm it.
It is bad that xen and dom0 accesse to the same UART.
This is only what I'm sure about.
Yes, that's bad which may be the reason why xen/x86 disables serial
directly. Ideally that should also apply to xen/ia64 since that option is
common in drivers/xen. So I'm not sure why that option doesn't work
for ia64. Alex should know more about this area, and it may simply
come from a mis-configuration case...
Thanks,
Kevin
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