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From: Julien Grall <julien@xen.org>
To: Elliott Mitchell <ehem+xen@m5p.com>
Cc: Masami Hiramatsu <masami.hiramatsu@linaro.org>,
	xen-devel@lists.xenproject.org,
	Alex Benn??e <alex.bennee@linaro.org>,
	bertrand.marquis@arm.com, andre.przywara@arm.com,
	Julien Grall <jgrall@amazon.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	George Dunlap <george.dunlap@citrix.com>,
	Ian Jackson <iwj@xenproject.org>, Jan Beulich <jbeulich@suse.com>,
	Wei Liu <wl@xen.org>, Roger Pau Monn?? <roger.pau@citrix.com>
Subject: Re: [PATCH 0/4] xen/arm: Unbreak ACPI
Date: Fri, 9 Oct 2020 19:15:20 +0100
Message-ID: <55a4ac3d-dc6f-f2f6-1a98-62d1c555d26e@xen.org> (raw)
In-Reply-To: <20201009142208.GA63582@mattapan.m5p.com>

Hi Elliott,

On 09/10/2020 15:22, Elliott Mitchell wrote:
> On Fri, Oct 09, 2020 at 10:39:26AM +0100, Julien Grall wrote:
>> On 08/10/2020 19:39, Elliott Mitchell wrote:
>>> Your (Masami Hiramatsu) patch seems plausible, but things haven't
>>> progressed enough for me to endorse it.  Looks like something closer to
>>> the core of ACPI still needs further work, Julien Grall?
>>
>> I didn't go very far during my testing because QEMU is providing ACPI
>> 5.1 (Xen only supports 6.0+ so far).
>>
>> For your log above, Xen finished to boot and now dom0 should start
>> booting. The lack of console output may be because of a crash in Linux
>> during earlyboot.
>>
>> Do you have the early console enabled Linux? This can be done by adding
>> earlycon=xenboot on the Linux command line.
> 
> Finding all the command-line console settings can be a challenge.  I had
> thought it was supposed to be "console=hvc0 earlycon=hvc0".
> 
> With that though I finally have some output which claims to come from the
> Linux kernel (yay! finally hit this point!).  As we were both guessing,
> very early kernel panic:
> 
> [    0.000000] efi: Getting EFI parameters from FDT:
> [    0.000000] efi: Can't find 'System Table' in device tree!

Thank you for sending part of the log. Looking at Linux 5.6 code, the 
error message is printed by efi_get_fdt_params() (see 
drivers/firmware/efi.c) when one of the property is missing.

'System Table' suggests that Linux wasn't enable to find 
"linux,uefi-system-table" or "xen,uefi-system-table".

Xen will only create later. Would it be possible to add some code in 
__find_uefi_params() to confirm which property Linux thinks is missing?

> [    0.000000] cma: Failed to reserve 64 MiB
> [    0.000000] Kernel panic - not syncing: Failed to allocate page table page
> 
> I don't know whether this is a problem with the mini-DT which was passed
> in versus ACPI tables.  I note a complete lack of ACPI table information.

I think this is normal because, IIRC, the ACPI root pointer will be 
found using the System Table.

> The kernel is from a 5.6-based kernel tree.  I'm unsure which portion to
> try updating next.
> 
> 

Cheers,

-- 
Julien Grall


  reply index

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-26 20:55 Julien Grall
2020-09-26 20:55 ` [PATCH 1/4] xen/acpi: Rework acpi_os_map_memory() and acpi_os_unmap_memory() Julien Grall
2020-09-28  8:18   ` Jan Beulich
2020-09-28  9:58     ` Julien Grall
2020-09-28 10:09       ` Jan Beulich
2020-09-28 10:39         ` Julien Grall
2020-10-10  9:49           ` Julien Grall
2020-10-10 10:04             ` Julien Grall
2020-09-29 11:10   ` Rahul Singh
2020-10-01  0:06   ` Stefano Stabellini
2020-10-01 15:09     ` Julien Grall
2020-09-26 20:55 ` [PATCH 2/4] xen/arm: acpi: The fixmap area should always be cleared during failure/unmap Julien Grall
2020-09-29 11:13   ` Rahul Singh
2020-10-01  0:30   ` Stefano Stabellini
2020-10-01 15:14     ` Julien Grall
2020-09-26 20:55 ` [PATCH 3/4] xen/arm: Check if the platform is not using ACPI before initializing Dom0less Julien Grall
2020-09-29 11:17   ` Rahul Singh
2020-09-30 23:26   ` Stefano Stabellini
2020-09-26 20:55 ` [PATCH 4/4] xen/arm: Introduce fw_unreserved_regions() and use it Julien Grall
2020-09-30 23:40   ` Stefano Stabellini
2020-10-01 15:34     ` Julien Grall
2020-09-27  1:47 ` [PATCH 0/4] xen/arm: Unbreak ACPI Elliott Mitchell
2020-09-29 15:28   ` Elliott Mitchell
2020-09-28  6:47 ` Masami Hiramatsu
2020-09-28 13:00   ` Masami Hiramatsu
2020-10-16 22:33     ` Xen-ARM EFI/ACPI problems (was: Re: [PATCH 0/4] xen/arm: Unbreak ACPI) Elliott Mitchell
2020-10-17  5:12       ` Elliott Mitchell
2020-10-08 18:39   ` [PATCH 0/4] xen/arm: Unbreak ACPI Elliott Mitchell
2020-10-09  9:39     ` Julien Grall
2020-10-09 14:22       ` Elliott Mitchell
2020-10-09 18:15         ` Julien Grall [this message]
2020-10-09 22:36           ` Elliott Mitchell
2020-10-09 21:49   ` Elliott Mitchell
2020-10-10 11:02   ` Julien Grall
2020-10-12 19:02     ` Stefano Stabellini
2020-10-12 21:34       ` Elliott Mitchell
2020-10-14  1:06         ` Stefano Stabellini
2020-10-14  1:37           ` Elliott Mitchell
2020-10-14 17:47             ` Julien Grall
2020-10-15 18:00               ` Stefano Stabellini
2020-10-14 17:44       ` Julien Grall
2020-09-29 11:10 ` Rahul Singh
2020-09-29 15:29 ` Alex Bennée
2020-09-29 17:07   ` Julien Grall
2020-09-29 21:11     ` Alex Bennée
2020-09-29 23:39       ` André Przywara
2020-09-30  8:51         ` Alex Bennée
2020-09-30 10:35         ` Julien Grall
2020-09-30  9:42       ` Julien Grall
2020-09-30 10:38         ` Alex Bennée
2020-09-30 11:10           ` Julien Grall

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