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Message-ID: <87a5s5z44x.fsf@all.your.base.are.belong.to.us>
Date: Thu, 26 Oct 2023 19:26:38 +0200
From: Björn Töpel <bjorn@...nel.org>
To: Anup Patel <apatel@...tanamicro.com>
Cc: Anup Patel <anup@...infault.org>,
Björn Töpel <bjorn@...osinc.com>,
Thomas Gleixner <tglx@...utronix.de>,
linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
x86@...nel.org
Subject: Re: [RFC PATCH] genirq/matrix: Dynamic bitmap allocation
Anup Patel <apatel@...tanamicro.com> writes:
> On Thu, Oct 26, 2023 at 3:50 PM Björn Töpel <bjorn@...nel.org> wrote:
>>
>> From: Björn Töpel <bjorn@...osinc.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: Björn Töpel <bjorn@...osinc.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. :-)
Björn
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