On Fri, Mar 30, 2012 at 07:05:13AM +0000, Liu, Jinsong wrote: > Konrad Rzeszutek Wilk wrote: > >>>> If it benefits other architectures (say ARM) then adding in hooks > >>>> there (in osl for example) makes sense - but I am not sure if ARM > >>>> has a form of _PUR code/calls it needs to do. > >>>> > >>>> So with that in mind, neither of those options seems proper - as > >>>> all of them depend on changing something in drivers/acpi/*. > >>>> > >>>> I've one or two suggestions of what could be done to still make > >>>> this work, but I need you to first see what happens if the native > >>>> acpi_pad runs under Xen with the latest upstream code (along with > >>>> three patches that are in a BZ I pointed you too). > >>> > >>> Do you mean test the patch > >>> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=blobdiff;f=arch/x86/xen/enlighten.c;h=b132ade26f778f2cfec7c2d5c7b6db48afe424d5;hp=4172af8ceeb363d06912af15bf89e8508752b794;hb=d4c6fa73fe984e504d52f3d6bba291fd76fe49f7;hpb=aab008db8063364dc3c8ccf4981c21124866b395 > > > > Right. > > OK, I test by simulated method (I don't have platform w/ _PUR), executed __monitor at dom0 kernel. > In the test, it in fact no need to use platform w/ _PUR since it only care mwait, and __monitor would generated UD no matter xen hypervisor exposing mwait or not (break cpuid law or CPL law). > > As expected, UD not handled by hypervisor, then bounce back to the created bounce frame of dom0, then > > [ 82.282152] invalid opcode: 0000 [#1] SMP ^M > [ 82.282170] CPU 0 ^M > [ 82.282175] Modules linked in: monitor(O+) xen_gntdev [last unloaded: scsi_wait_scan]^M > [ 82.282196] ^M > [ 82.282203] Pid: 5315, comm: insmod Tainted: G O 3.3.0-rc3+ #22 Intel Corporation S2600CP/S2600CP^M > [ 82.282222] RIP: e030:[<ffffffffa0005019>] [<ffffffffa0005019>] init_module+0x19/0x20 [monitor]^M > [ 82.282243] RSP: e02b:ffff8807a6357e68 EFLAGS: 00010246^M > [ 82.282251] RAX: ffffffffa0005068 RBX: 0000000001ab4010 RCX: 0000000000000000^M > [ 82.282261] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffa0005000^M > [ 82.282271] RBP: ffff8807a6357e68 R08: ffff8807bdee2c60 R09: ffff8807b9802700^M > [ 82.282280] R10: ffffffff8111bd9c R11: 0000000000000000 R12: 0000000000000000^M > [ 82.282289] R13: ffffffffa0005000 R14: 0000000000000000 R15: ffff8807a6357ee8^M > [ 82.282307] FS: 00007fb88c33c700(0000) GS:ffff8807bdecd000(0000) knlGS:0000000000000000^M > [ 82.282318] CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b^M > [ 82.282327] CR2: 00000035044d9380 CR3: 00000007a637d000 CR4: 0000000000042660^M > [ 82.282370] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000^M > [ 82.282389] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400^M > [ 82.282394] Process insmod (pid: 5315, threadinfo ffff8807a6356000, task ffff8807b22aba80)^M > [ 82.282399] Stack:^M > [ 82.282402] ffff8807a6357e98 ffffffff8100203d 0000000001ab4010 ffffffffa0005080^M > [ 82.282411] ffffffffa0007210 0000000000000000 ffff8807a6357f78 ffffffff8109f298^M > [ 82.282420] ffff8807b3815300 ffffc90013f29000 ffff880700000005 ffff880700000003^M > [ 82.282429] Call Trace:^M > [ 82.282440] [<ffffffff8100203d>] do_one_initcall+0x3d/0x170^M > [ 82.282450] [<ffffffff8109f298>] sys_init_module+0x138/0x1720^M > [ 82.282462] [<ffffffff8174f039>] system_call_fastpath+0x16/0x1b^M > [ 82.282466] Code: <0f> 01 c8 31 c0 c9 c3 55 48 c7 c7 58 50 00 a0 31 c0 48 89 e5 e8 44 ^M > [ 82.282500] RIP [<ffffffffa0005019>] init_module+0x19/0x20 [monitor]^M > [ 82.282526] RSP <ffff8807a6357e68>^M Eww. Thanks for testing it out! > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
