[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] amd iommu: Dump flags of IO page faults
On 09/06/2012 12:59 AM, Sander Eikelenboom wrote: Wednesday, September 5, 2012, 4:42:42 PM, you wrote:Hi Jan, Attached patch dumps io page fault flags. The flags show the reason of the fault and tell us if this is an unmapped interrupt fault or a DMA fault.Thanks, Weisigned-off-by: Wei Wang<wei.wang2@xxxxxxx>I have applied the patch and the flags seem to differ between the faults: AMD-Vi: IO_PAGE_FAULT: domain = 0, device id = 0x0a06, fault address = 0xc2c2c2c0, flags = 0x000 (XEN) [2012-09-05 20:54:16] AMD-Vi: IO_PAGE_FAULT: domain = 0, device id = 0x0a06, fault address = 0xc2c2c2c0, flags = 0x000 (XEN) [2012-09-05 20:54:16] AMD-Vi: IO_PAGE_FAULT: domain = 14, device id = 0x0700, fault address = 0xa8d339e0, flags = 0x020 (XEN) [2012-09-05 20:54:16] AMD-Vi: IO_PAGE_FAULT: domain = 14, device id = 0x0700, fault address = 0xa8d33a40, flags = 0x020 OK, so they are not interrupt requests. I guess further information from your system would be helpful to debug this issue: 1) xl info 2) xl list 3) lscpi -vvv (NOTE: not in dom0 but in your guest) 4) cat /proc/iomem (in both dom0 and your hvm guest)* I would also like to know the symptoms of device 0x0700 when IO_PF happened. Did it stop working? (BTW: I copied a few options from your boot cmd line and it worked with my RD890 system dom0_mem=1024M,max:1024M loglvl=all loglvl_guest=all console_timestamps cpuidle cpufreq=xen noreboot debug lapic=debug apic_verbosity=debug apic=debug iommu=on,verbose,debug,no-sharept * so, what OEM board you have?) Also from your log, these lines looks very strange:(XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xd5, mfn=0xa4a11 (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xd7, mfn=0xa4a0f (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xd9, mfn=0xa4a0d (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xdb, mfn=0xa4a0b (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xdd, mfn=0xa4a09 (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xdf, mfn=0xa4a07 (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xe1, mfn=0xa4a05 (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xe3, mfn=0xa4a03 (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xe5, mfn=0xa4a01 (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xe7, mfn=0xa463f (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xe9, mfn=0xa463d (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xeb, mfn=0xa463b (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xed, mfn=0xa4639 (XEN) [2012-09-04 15:54:35] hvm.c:2435:d15 guest attempted write to read-only memory page. gfn=0xef, mfn=0xa4637 (XEN) [2012-09-04 16:13:56] AMD-Vi: IO_PAGE_FAULT: domain = 0, device id = 0x0a06, fault address = 0xc2c2c2c0 (XEN) [2012-09-04 16:13:56] AMD-Vi: IO_PAGE_FAULT: domain = 14, device id = 0x0700, fault address = 0xa90f8300 (XEN) [2012-09-04 16:13:56] AMD-Vi: IO_PAGE_FAULT: domain = 14, device id = 0x0700, fault address = 0xa90f8340 (XEN) [2012-09-04 16:13:56] AMD-Vi: IO_PAGE_FAULT: domain = 14, device id = 0x0700, fault address = 0xa90f8380 (XEN) [2012-09-04 16:13:56] AMD-Vi: IO_PAGE_FAULT: domain = 14, device id = 0x0700, fault address = 0xa90f83c0 * they are just followed by the IO PAGE fault. Do you know where are they from? Your video card driver maybe? Thanks, Wei Complete xl dmesg and lspci -vvvknn attached. Thx -- Sander _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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