freebsd-skq/sys/dev/xen
royger f25e305738 x86/dma_bounce: revert r289834 and r289836
The new load_ma implementation can cause dereferences when used with
certain drivers, back it out until the reason is found:

Fatal trap 12: page fault while in kernel mode
cpuid = 11; apic id = 03
fault virtual address   = 0x30
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff808a2d22
stack pointer           = 0x28:0xfffffe07cc737710
frame pointer           = 0x28:0xfffffe07cc737790
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = interrupt enabled, resume, IOPL = 0
current process         = 13 (g_down)
trap number             = 12
panic: page fault
cpuid = 11
KDB: stack backtrace:
#0 0xffffffff80641647 at kdb_backtrace+0x67
#1 0xffffffff80606762 at vpanic+0x182
#2 0xffffffff806067e3 at panic+0x43
#3 0xffffffff8084eef1 at trap_fatal+0x351
#4 0xffffffff8084f0e4 at trap_pfault+0x1e4
#5 0xffffffff8084e82f at trap+0x4bf
#6 0xffffffff80830d57 at calltrap+0x8
#7 0xffffffff8063beab at _bus_dmamap_load_ccb+0x1fb
#8 0xffffffff8063bc51 at bus_dmamap_load_ccb+0x91
#9 0xffffffff8042dcad at ata_dmaload+0x11d
#10 0xffffffff8042df7e at ata_begin_transaction+0x7e
#11 0xffffffff8042c18e at ataaction+0x9ce
#12 0xffffffff802a220f at xpt_run_devq+0x5bf
#13 0xffffffff802a17ad at xpt_action_default+0x94d
#14 0xffffffff802c0024 at adastart+0x8b4
#15 0xffffffff802a2e93 at xpt_run_allocq+0x193
#16 0xffffffff802c0735 at adastrategy+0xf5
#17 0xffffffff80554206 at g_disk_start+0x426
Uptime: 2m29s
2015-10-26 14:50:35 +00:00
..
balloon xen: Code cleanup and small bug fixes 2015-10-21 10:44:07 +00:00
blkback xen: Code cleanup and small bug fixes 2015-10-21 10:44:07 +00:00
blkfront x86/dma_bounce: revert r289834 and r289836 2015-10-26 14:50:35 +00:00
console xen/console: Introduce a new console driver for Xen guest 2015-10-08 16:39:43 +00:00
control xen: Code cleanup and small bug fixes 2015-10-21 10:44:07 +00:00
debug xen: add a handler for the debug interrupt 2015-03-30 07:09:07 +00:00
evtchn xen: import a proper event channel user-space device 2014-10-22 16:57:11 +00:00
grant_table xen: Code cleanup and small bug fixes 2015-10-21 10:44:07 +00:00
netback xen: Code cleanup and small bug fixes 2015-10-21 10:44:07 +00:00
netfront netfront: fix LINT-NOIP 2015-10-21 13:53:07 +00:00
pci Remove duplicate pci_driver class declaration. 2015-01-02 08:57:36 +00:00
pcifront Add domain support to PCI bus allocation 2015-09-16 23:34:51 +00:00
privcmd xen: introduce a newbus function to allocate unused memory 2015-05-08 14:48:40 +00:00
pvcpu
timer Generalized parts of the XEN timer code into a generic pvclock 2015-02-04 08:26:43 +00:00
xenpci xen: Code cleanup and small bug fixes 2015-10-21 10:44:07 +00:00
xenstore xen: Code cleanup and small bug fixes 2015-10-21 10:44:07 +00:00