From: Stefano Stabellini <sstabellini@kernel.org>
To: Julien Grall <julien@xen.org>
Cc: Elliott Mitchell <ehem+xen@m5p.com>,
Stefano Stabellini <sstabellini@kernel.org>,
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>,
Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
Subject: Re: [PATCH 0/4] xen/arm: Unbreak ACPI
Date: Thu, 15 Oct 2020 11:00:14 -0700 (PDT) [thread overview]
Message-ID: <alpine.DEB.2.21.2010151058370.10386@sstabellini-ThinkPad-T480s> (raw)
In-Reply-To: <1b5f19f6-ea70-9e58-bf36-de7f7d54153a@xen.org>
On Wed, 14 Oct 2020, Julien Grall wrote:
> Hi Elliot,
>
> On 14/10/2020 02:37, Elliott Mitchell wrote:
> > On Tue, Oct 13, 2020 at 06:06:26PM -0700, Stefano Stabellini wrote:
> > > On Mon, 12 Oct 2020, Elliott Mitchell wrote:
> > > > I'm on different hardware, but some folks have setup Tianocore for it.
> > > > According to Documentation/arm64/acpi_object_usage.rst,
> > > > "Required: DSDT, FADT, GTDT, MADT, MCFG, RSDP, SPCR, XSDT". Yet when
> > > > booting a Linux kernel directly on the hardware it lists APIC, BGRT,
> > > > CSRT, DSDT, DBG2, FACP, GTDT, PPTT, RSDP, and XSDT.
> > > >
> > > > I don't know whether Linux's ACPI code omits mention of some required
> > > > tables and merely panics if they're absent. Yet I'm speculating the
> > > > list
> > > > of required tables has shrunk, SPCR is no longer required, and the
> > > > documentation is out of date. Perhaps SPCR was required in early Linux
> > > > ACPI implementations, but more recent ones removed that requirement?
> > >
> > > I have just checked and SPCR is still a mandatory table in the latest
> > > SBBR specification. It is probably one of those cases where the firmware
> > > claims to be SBBR compliant, but it is not, and it happens to work with
> > > Linux.
> >
> > Is meeting the SBBR specification supposed to be a requirement of running
> > Xen-ARM?
>
> This is not my goal. We should try to get Xen running everywhere as long as
> this doesn't require a lot of extra code. IOW, don't ask me to review/accept a
> port of Xen to RPI3 ;).
I agree with Julien's statement.
For context, my previous comment in regards to SBBR was because I am
positive that Masami's platform is expected to be SBBR compliant.
next prev parent reply other threads:[~2020-10-15 18:00 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-26 20:55 [PATCH 0/4] xen/arm: Unbreak ACPI 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 12:41 ` [PATCH] xen: acpi: Hide UART address only if SPCR exists Masami Hiramatsu
2020-09-28 12:42 ` Masami Hiramatsu
2021-01-19 7:25 ` Elliott Mitchell
2021-01-20 18:05 ` Julien Grall
2020-09-28 13:00 ` [PATCH 0/4] xen/arm: Unbreak ACPI 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
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 [this message]
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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