Date:   Tue, 07 Mar 2023 06:13:22 +0000
From:   Conor Dooley <conor@kernel.org>
To:     Sunil V L <sunilvl@ventanamicro.com>
CC:     linux-riscv@lists.infradead.org, linux-acpi@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Len Brown <lenb@kernel.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Marc Zyngier <maz@kernel.org>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Anup Patel <apatel@ventanamicro.com>,
        Andrew Jones <ajones@ventanamicro.com>,
        Atish Patra <atishp@rivosinc.com>,
        'Conor Dooley ' <conor.dooley@microchip.com>,
        llvm@lists.linux.dev
Subject: Re: [PATCH V3 00/20] Add basic ACPI support for RISC-V
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On 7 March 2023 05:06:16 GMT, Sunil V L <sunilvl@ventanamicro=2Ecom> wrote=
:
>On Mon, Mar 06, 2023 at 09:51:09PM +0000, Conor Dooley wrote:
>> Hey Sunil,
>>=20
>> 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=2E
>> > Supporting external interrupt controllers is in progress and hence it=
 is
>> > tested using poll based HVC SBI console and RAM disk=2E
>> >=20
>> > The first patch in this series is one of the patch from Jisheng's
>> > series [1] which is not merged yet=2E This patch is required to suppo=
rt
>> > ACPI since efi_init() which gets called before sbi_init() can enable
>> > static branches and hits a panic=2E
>> >=20
>> > Patch 2 and 3 are ACPICA patches which are not merged into acpica yet
>> > but a PR is raised already=2E
>> >=20
>> > Below are two ECRs approved by ASWG=2E
>> > RINTC - https://drive=2Egoogle=2Ecom/file/d/1R6k4MshhN3WTT-hwqAquu5nX=
6xSEqK2l/view
>> > RHCT - https://drive=2Egoogle=2Ecom/file/d/1nP3nFiH4jkPMp6COOxP6123DC=
ZKR-tia/view
>> >=20
>> > The series depends on Anup's IPI improvement series [2]=2E
>> >=20
>> > [1] https://lore=2Ekernel=2Eorg/all/20220821140918=2E3613-1-jszhang@k=
ernel=2Eorg/
>> > [2] https://lore=2Ekernel=2Eorg/lkml/20230103141221=2E772261-7-apatel=
@ventanamicro=2Ecom/T/
>>=20
>> Building a clang-15 allmodconfig (I didn't try gcc) with this series, a=
nd
>> Anup's IPI bits, results in a broken build, due to failings in cmpxchg:
>>=20
>> /stuff/linux/drivers/platform/surface/aggregator/controller=2Ec:61:25: =
error: call to __compiletime_assert_335 declared with 'error' attribute: BU=
ILD_BUG failed
>>         while (unlikely((ret =3D cmpxchg(&c->value, old, new)) !=3D old=
)) {
>>                                ^
>Hi Conor,
>
>I am able to build without any of these issues using clang-15=2E I am
>wondering whether the base is proper=2E I had rebased on top of the maste=
r
>and couple of patches from IPI series were already merged in the master=
=2E
>
>Do you mind verifying with my branch
>https://github=2Ecom/vlsunil/linux/commits/acpi_b1_us_review_ipi17_V3?

I can check that later I suppose=2E

>
>Or if you could provide me your branch details, I can look further=2E

6=2E3-rc1, with both series applied, sans Anups applied patches=2E