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From:   =?utf-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@kernel.org>
To:     Anup Patel <apatel@ventanamicro.com>
Cc:     Anup Patel <anup@brainfault.org>,
        =?utf-8?B?QmrDtnJuIFTDtnBlbA==?= <bjorn@rivosinc.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
        x86@kernel.org
Subject: Re: [RFC PATCH] genirq/matrix: Dynamic bitmap allocation
In-Reply-To: <CAK9=C2Vcbq_ReGcK51uOYp+M2hakz=9=RNHaHFMbfxhth_4cnA@mail.gmail.com>
References: <20231026101957.320572-1-bjorn@kernel.org>
 <CAK9=C2Vcbq_ReGcK51uOYp+M2hakz=9=RNHaHFMbfxhth_4cnA@mail.gmail.com>
Date:   Thu, 26 Oct 2023 19:26:38 +0200
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Anup Patel <apatel@ventanamicro.com> writes:

> On Thu, Oct 26, 2023 at 3:50=E2=80=AFPM Bj=C3=B6rn T=C3=B6pel <bjorn@kern=
el.org> wrote:
>>
>> From: Bj=C3=B6rn T=C3=B6pel <bjorn@rivosinc.com>
>>
>> Some (future) users of the irq matrix allocator, do not know the size
>> of the matrix bitmaps at compile time.
>>
>> To avoid wasting memory on unnecessary large bitmaps, size the bitmap
>> at matrix allocation time.
>>
>> Signed-off-by: Bj=C3=B6rn T=C3=B6pel <bjorn@rivosinc.com>
>> ---
>> Here's a cleaned up, boot tested, proper patch.
>>
>> Thomas, this is just FYI/RFC. This change would only make sense, if
>> the RISC-V AIA series starts using the IRQ matrix allocator.
>
> I have dropped "multi-MSI" support from the AIA v12 series
> and also integrated the IRQ matrix allocator. This patch is
> included in the AIA v12 series.

Ok!

> For reference, look at riscv_aia_v12 branch at:
> https://github.com/avpatel/linux.git
>
> I still need to rebase this upon device MSI domain support
> from Thomas.

Note that the per-device domain support is already upstream, it's only
the ARM cleanups that are not.

IOW, there's no need to wait for the ARM cleanups. :-)


Bj=C3=B6rn