[PATCH V3 00/20] Add basic ACPI support for RISC-V

[Conor Dooley]

On Tue, Mar 07, 2023 at 06:13:22AM +0000, Conor Dooley wrote:
> 
> 
> On 7 March 2023 05:06:16 GMT, Sunil V L <sunilvl at ventanamicro.com> wrote:
> >On Mon, Mar 06, 2023 at 09:51:09PM +0000, Conor Dooley wrote:
> >> Hey Sunil,
> >> 
> >> On Fri, Mar 03, 2023 at 07:06:27PM +0530, Sunil V L wrote:
> >> > This patch series enables the basic ACPI infrastructure for RISC-V.
> >> > Supporting external interrupt controllers is in progress and hence it is
> >> > tested using poll based HVC SBI console and RAM disk.
> >> > 
> >> > The first patch in this series is one of the patch from Jisheng's
> >> > series [1] which is not merged yet. This patch is required to support
> >> > ACPI since efi_init() which gets called before sbi_init() can enable
> >> > static branches and hits a panic.
> >> > 
> >> > Patch 2 and 3 are ACPICA patches which are not merged into acpica yet
> >> > but a PR is raised already.
> >> > 
> >> > Below are two ECRs approved by ASWG.
> >> > RINTC - https://drive.google.com/file/d/1R6k4MshhN3WTT-hwqAquu5nX6xSEqK2l/view
> >> > RHCT - https://drive.google.com/file/d/1nP3nFiH4jkPMp6COOxP6123DCZKR-tia/view
> >> > 
> >> > The series depends on Anup's IPI improvement series [2].
> >> > 
> >> > [1] https://lore.kernel.org/all/20220821140918.3613-1-jszhang@kernel.org/
> >> > [2] https://lore.kernel.org/lkml/20230103141221.772261-7-apatel@ventanamicro.com/T/
> >> 
> >> Building a clang-15 allmodconfig (I didn't try gcc) with this series, and
> >> Anup's IPI bits, results in a broken build, due to failings in cmpxchg:
> >> 
> >> /stuff/linux/drivers/platform/surface/aggregator/controller.c:61:25: error: call to __compiletime_assert_335 declared with 'error' attribute: BUILD_BUG failed
> >>         while (unlikely((ret = cmpxchg(&c->value, old, new)) != old)) {
> >>                                ^

> > I am able to build without any of these issues using clang-15. I am
> > wondering whether the base is proper. I had rebased on top of the master
> > and couple of patches from IPI series were already merged in the master.
> > 
> > Do you mind verifying with my branch
> > https://github.com/vlsunil/linux/commits/acpi_b1_us_review_ipi17_V3?
> 
> I can check that later I suppose.

That's broken too.

> > Or if you could provide me your branch details, I can look further.
> 
> 6.3-rc1, with both series applied, sans Anups applied patches.

I've pushed my stuff here, but unlikely that it makes any odds since
your branch experiences the same build issue.
https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux.git/ borked-acpi-surface

My build commands are wrapped in a script, but it's an LLVM=1
allmodconfig run w/ clang-15(.0.7) etc.

Chees,
Conor.
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