Il 09/06/2015 17:21, Paul Durrant ha scritto:
-----Original Message-----
From: Fabio Fantoni [mailto:fabio.fant...@m2r.biz]
Sent: 09 June 2015 15:44
To: Paul Durrant; xen-de...@lists.xenproject.org
Subject: Re: [Xen-devel] [PATCH 00/17] x86/hvm: I/O emulation cleanup and
fix
Il 08/06/2015 16:33, Paul Durrant ha scritto:
This patch series re-works much of the code involved in emulation of port
and memory mapped I/O for HVM guests.
The code has become very convoluted and, at least by inspection, certain
emulations will apparently malfunction.
The series is broken down into 17 patches (which are also available in
my xenbits repo:
http://xenbits.xen.org/gitweb/?p=people/pauldu/xen.git
on the emulation18 branch) as follows:
Big thanks for your work.
I tested them taking the patches from emulation18 branch.
I tried xl create of a window 7 domU but during xl create dom0
istant-reboot and there isn't anything about the problem in the logs
(kern.log, syslog, qemu log, xl log ecc...)
I tried also with linux (hvm) domU and with stdvga instead qxl I had
setted but same result.
For debug the problem I must enable all xen debug in grub entry and
redirect output to serial, similar to debug of dom0 boot problem or I
must do different thing?
Having serial is very useful in these cases. I've been debugging with a 32-bit
Win 7 VM so it would be useful if you could bisect bit. There are natural
boundaries in the series you could try first:
Apply everything up to and including 'x86/hvm: unify stdvga mmio intercept with
standard mmio intercept'
Then try everything up to and including ' x86/hvm: remove extraneous parameter
from hvmtrace_io_assist()'
Then, if you get that far, try the rest one at a time.
Paul
Thanks for reply.
I tried to boot with full debug enabled and with serial on lan but
server insta-reboot without show error or useful output on redirected
output or monitor.
I used same parameters of other debug I did long time ago if I remember
good, here the grub2 entry:
menuentry 'Wheezy con Linux 3.16.0-0.bpo.4-amd64 e XEN - RAID - Debug
su Seriale' --class debian --class gnu-linux --class gnu --class os {
set root='(RAID-ROOT)'
echo 'Caricamento Hypervisor Xen...'
multiboot /boot/xen.gz placeholder dom0_mem=2G,max:3G
swiotlb=65762 loglvl=all guest_loglvl=all sync_console console_to_ring
com2=19200,8n1 console=com2
echo 'Caricamento Linux 3.16.0-0.bpo.4-amd64...'
linux /boot/vmlinuz-3.16.0-0.bpo.4-amd64 placeholder
root=/dev/mapper/RAID-ROOT ro console=hvc0 earlyprintk=xen nomodeset
echo 'Caricamento ramdisk iniziale...'
initrd /boot/initrd.img-3.16.0-0.bpo.4-amd64
}
Here the entry without debug working:
menuentry 'RAID - Debian 7.8 (wheezy) con Linux 3.16.0-0.bpo.4-amd64 e
XEN 4.6-unstable' --class debian --class gnu-linux --class gnu --class
os --class xen {
set fallback="1"
set root='(RAID-ROOT)'
echo 'Caricamento Hypervisor Xen 4.6-unstable...'
multiboot /boot/xen.gz placeholder dom0_mem=2G,max:3G
echo 'Caricamento Linux 3.16.0-0.bpo.4-amd64 ...'
module /boot/vmlinuz-3.16.0-0.bpo.4-amd64 placeholder
root=/dev/mapper/RAID-ROOT ro swiotlb=65762 quiet
echo 'Caricamento ramdisk iniziale...'
module /boot/initrd.img-3.16.0-0.bpo.4-amd64
}
I did something wrong?
Now I'll try to bisect the patch serie following your advice.
Thanks for any reply and sorry for my bad english.
x86/hvm: simplify hvmemul_do_io()
x86/hvm: re-name struct hvm_mmio_handler to hvm_mmio_ops
x86/hvm: unify internal portio and mmio intercepts
x86/hvm: unify dpci portio intercept with standard portio intercept
x86/hvm: unify stdvga mmio intercept with standard mmio intercept
x86/hvm: revert 82ed8716b "fix direct PCI port I/O emulation retry...
x86/hvm: only call hvm_io_assist() from hvm_wait_for_io()
x86/hvm: split I/O completion handling from state model
x86/hvm: remove hvm_io_pending() check in hvmemul_do_io()
x86/hvm: remove HVMIO_dispatched I/O state
x86/hvm: remove hvm_io_state enumeration
x86/hvm: use ioreq_t to track in-flight state
x86/hvm: only acquire RAM pages for emulation when we need to
x86/hvm: remove extraneous parameter from hvmtrace_io_assist()
x86/hvm: make sure translated MMIO reads or writes fall within a page
x86/hvm: remove multiple open coded 'chunking' loops
x86/hvm: track large memory mapped accesses by linear address
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
