Re: kvm PCI assignment & VFIO ramblings

2011-07-30 Thread Benjamin Herrenschmidt
On Sat, 2011-07-30 at 12:20 -0600, Alex Williamson wrote: > On x86, the USB controllers don't typically live behind a PCIe-to-PCI > bridge, so don't suffer the source identifier problem, but they do often > share an interrupt. But even then, we can count on most modern devices > supporting PCI2.3

Re: kvm PCI assignment & VFIO ramblings

2011-07-30 Thread Benjamin Herrenschmidt
On Sat, 2011-07-30 at 12:20 -0600, Alex Williamson wrote: > On x86, the USB controllers don't typically live behind a PCIe-to-PCI > bridge, so don't suffer the source identifier problem, but they do often > share an interrupt. But even then, we can count on most modern devices > supporting PCI2.3

Re: kvm PCI assignment & VFIO ramblings

2011-07-30 Thread Benjamin Herrenschmidt
On Sat, 2011-07-30 at 09:58 +1000, Benjamin Herrenschmidt wrote: > Hi folks ! > > So I promised Anthony I would try to summarize some of the comments & > issues we have vs. VFIO after we've tried to use it for PCI pass-through > on POWER. It's pretty long, there are various items with more or less

[PATCH] perf: powerpc: Disable pagefaults during callchain stack read

2011-07-30 Thread David Ahern
Panic observed on an older kernel when collecting call chains for the context-switch software event: []rb_erase+0x1b4/0x3e8 []__dequeue_entity+0x50/0xe8 []set_next_entity+0x178/0x1bc []pick_next_task_fair+0xb0/0x118 []schedule+0x500/0x614 []rwsem_down_failed_common+0xf0/0x264 []rwsem_down_r

Re: kvm PCI assignment & VFIO ramblings

2011-07-30 Thread Alex Williamson
On Sat, 2011-07-30 at 09:58 +1000, Benjamin Herrenschmidt wrote: > Hi folks ! > > So I promised Anthony I would try to summarize some of the comments & > issues we have vs. VFIO after we've tried to use it for PCI pass-through > on POWER. It's pretty long, there are various items with more or less

Re: HELP:PowerPc-Linux kernel

2011-07-30 Thread Gary Thomas
On 2011-07-30 06:21, naresh.kamb...@wipro.com wrote: Hi All, I have started working on powerpc board bring up. I have prepared dtb file and booted linux kernel with my debug statement. Problem: I could not see anything on the serial console. By using the emulator I can read __log_buf and found

RE: HELP:PowerPc-Linux kernel

2011-07-30 Thread naresh.kamboju
Hi All, I have started working on powerpc board bring up. I have prepared dtb file and booted linux kernel with my debug statement. Problem: I could not see anything on the serial console. By using the emulator I can read __log_buf and found below info. How can I initialize the serial console?