NMI watchdog hooks off ac_timer softirq rather than apic timer irq.
In extreme situations we may service ac_timer events without ever
actually taking an apic interrupt.
Signed-off-by: Keir Fraser <keir@xensource.com>
If Xen is told to use a serial console via a com1= or com2= directive
on the Xen command line, it now hides that particular UART from dom0.
This means that it's now safe to enable the 8250 driver in the Linux
config. If Xen has been told to use com1, the dom0 linux kernel will
not see /dev/ttyS0, but will see ttyS1,S2 etc if they are present,
enabling them to be used for mice, modems, printers etc.
Unfortunately, the 8250 driver will register itself for a ttyS even if
that particular UART isn't present. This is really annoying, as it
prevents the 'xencons' driver registering itself as ttyS0 even though
the 8250 won't see ttyS0 as present if Xen is using com1. This
prevents us from enabling 8250 in the default kernel config, as it
will change current behaviour.
If you want to use 8250 and xencons, the trick is to tell xencons to
grab a high numbered ttyS port that the 8250 driver will have left
alone. For example, put "xencons=ttyS31" on the Linux command line.
You'll then be able to edit /etc/inittab to add an entry for a
getty on ttyS31 if you want to be able to log in on the serial console
that is being shared with Xen.
If anyone knows a way of cleanly kicking the 8250 driver off a
particular char minor then please let me know!
Remove DOM0_IOPL_PERMISSION since it doesn't make much sense.
All admin checks go throu the bitmap mask. Even privileged domains
(inc. domain0) must have a mask.
Signed-off-by: Keir Fraser <keir@xensource.com>
Fix iopl/iobitmap interfaces. Control tools can set per-domain
access limits via DOM0_IOPL_PERMISSION/DOM0_IOPORT_PERMISSION.
Guests can set current permissions per VCPU via physdev ops.
These will always succeed -- checking against admin-set limits is
done at access time.
Signed-off-by: Keir Fraser <keir@xensource.com>
Avoid unnecessary pte flags changes, which are costly on Xen. Also clean
up XCHG handling in instruction emulator a little bit.
Signed-off-by: Keir Fraser <keir@xensource.com>
Schedule page scrubbing for dead domains off the per-cpu periodic
ticker. We take 10% of busy cpus and all of idle cpu time.
Signed-off-by: Keir Fraser <keir@xensource.com>
Calling alloc_boot_pages() after end_boot_allocator() can result in
double allocation of the same page.
Signed-off-by: Chengyuan Li <chengyuan.li@intel.com>
Signed-off-by: Arun Sharma <arun.sharma@intel.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
Fix floppy driver on Xen -- vmalloc/vfree are unsafe because of the
context that the fd_dma functions may get called from.
Signed-off-by: Keir Fraser <keir@xensource.com>
Check-in of the sparse tree for FreeBSD 5.3 (version 050317)
This currently supports running as a domU.
- to create freebsd-5.3-xenU run fbsdxensetup from anywhere in the tree
- once created go to freebsd-5.3-xenU on a FreeBSD 5.3 machine, run
xenfbsd_kernel_build - you'll find kernel and kernel.debug under
i386-xen/compile/XENCONF
See http://www.fsmware.com/xenofreebsd/5.3/xenbsdsetup.txt
Thanks to NetApp for their contributions in support of the FreeBSD port to Xen
.
Signed-off-by: Kip Macy <kip.macy@gmail.com
Signed-off-by: ian.pratt@cl.cam.ac.uk
Merge freefall.cl.cam.ac.uk:/auto/groups/xeno-xenod/BK/xen-2.0-testing.bk
into freefall.cl.cam.ac.uk:/auto/groups/xeno/users/iap10/xeno-clone/xen-2.0-testing.bk
