Re: [Xen-devel] Problems booting 32-bit PV; just me or more widespread?

[Jason Andryuk <jandryuk@xxxxxxxxx>]

On Thu, Aug 30, 2018 at 6:00 PM Boris Ostrovsky
<boris.ostrovsky@xxxxxxxxxx> wrote:
>
> On 08/29/2018 08:51 PM, Andy Smith wrote:
> > Hi,
> >
> > I'm sorry this is a long email, but I wanted to explain everything
> > that I have tried, because it seems like quite a few different
> > versions of 32-bit upstream Linux kernel no longer boot as PV guest
> > and I'm surprised I am the first to encounter this. Probably I
> > have done something wrong.
> >
> > I cannot get any of the Ubuntu packaged 32-bit mainline kernels
> > after v4.13.16 that are found at
> > http://kernel.ubuntu.com/~kernel-ppa/mainline/ to boot in 32-bit PV
> > mode. All of them from v4.14.0rc1 onwards crash on xl create either
> > saying "error: no XEN note found."
>
> Don't know what this error is, perhaps kernel was not compiled with
> CONFIG_XEN.

32bit 4.14 stable kernels work for me. Like Boris said, "error: no XEN
note found." makes me think CONFIG_XEN was not set.

> > or else immediately producing a
> > kernel panic like:
> >
> > .
> > .
> > .
> > [ 0.114370] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, 
> > max_idle_ns: 7645041785100000 ns
> > [ 0.114382] futex hash table entries: 256 (order: 2, 16384 bytes)
> > [ 0.114423] pinctrl core: initialized pinctrl subsystem
> > [ 0.134326] RTC time: 165:165:165, date: 165/165/65
> > [ 0.134442] NET: Registered protocol family 16
> > [ 0.134457] xen:grant_table: Grant tables using version 1 layout
> > [ 0.134502] Grant table initialized
> > [ 0.134544] audit: initializing netlink subsys (disabled)
> > [ 0.134611] audit: type=2000 audit(1535307799.132:1): state=initialized 
> > audit_enabled=0 res=1
> > [ 0.134678] EISA bus registered
> > [ 0.136019] PCI: setting up Xen PCI frontend stub
> > [ 0.136073] BUG: unable to handle kernel paging request at edc21fd9
> > [ 0.136084] IP: eisa_bus_probe+0x19/0x36
> > [ 0.136089] *pdpt = 0000000001ee6027 *pde = 0000000029cc6067 *pte = 
> > 0000000000000000
> > [ 0.136100] Oops: 0000 [#1] SMP
> > [ 0.136105] Modules linked in:
> > [ 0.136111] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.15.0-33-generic 
> > #36-Ubuntu
> > [ 0.136120] EIP: eisa_bus_probe+0x19/0x36
> > [ 0.136125] EFLAGS: 00010246 CPU: 0
> > [ 0.136130] EAX: edc21fd9 EBX: 00000000 ECX: 01e0d000 EDX: 00000200
> > [ 0.136138] ESI: c1d0d452 EDI: c1dd34a4 EBP: e9c89f24 ESP: e9c89f24
> > [ 0.136145] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: e021
> > [ 0.136154] CR0: 80050033 CR2: edc21fd9 CR3: 01e10000 CR4: 00042660
> > [ 0.136166] Call Trace:
> > [ 0.136173] do_one_initcall+0x49/0x174
> > [ 0.136179] ? parse_args+0x143/0x390
> > [ 0.136187] ? set_debug_rodata+0x14/0x14
> > [ 0.136193] kernel_init_freeable+0x149/0x1c5
> > [ 0.136201] ? rest_init+0xa0/0xa0
> > [ 0.136207] kernel_init+0xd/0xf0
> > [ 0.136213] ret_from_fork+0x2e/0x38
> > [ 0.140000] Code: ff b8 df 43 ae c1 e8 35 1b 88 ff e8 20 12 88 ff c9 c3 3e 
> > 8d 74 26 00 55 b9 04 00 00 00 31 d2 b8 d9 ff 0f 00 89 e5 e8 35 8d 35 ff 
> > <8b> 10 81 fa 45 49 53 41 75 0a c7 05 a0 76 ed c1 01 00 00 00 e8
> > [ 0.140000] EIP: eisa_bus_probe+0x19/0x36 SS:ESP: e021:e9c89f24
> > [ 0.140000] CR2: 00000000edc21fd9
> > [ 0.140000] ---[ end trace 8c00b3cb7d4f06ba ]---
> > [ 0.140013] Kernel panic - not syncing: Attempted to kill init! 
> > exitcode=0x00000009
> >
> > (that one was from the currently-packaged linux-image-generic in
> > Ubuntu 18.04 LTS).
>
>
> Yes, this looks like it was broken by f7eaf6e00fd5 ("x86/boot: Move EISA
> setup to a separate file").
>
> We used to use fixmap for EISA addresses, but not anymore. If you can
> build your own kernel you could try the patch below (may be
> whitespace-damaged)

My kernels disable CONFIG_ISA, and therefore CONFIG_EISA, so I haven't hit this.

Regards,
Jason

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