linux-kernel - Re: [PATCH v4 00/10] riscv: Add Zalasr ISA extension support

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Message-Id: <b0b0f9d727b334fa569c726fc13490dd51d4fe42.7caea664.2799.41de.8705.9603c8f00a51@bytedance.com>
Date: Wed, 19 Nov 2025 23:57:38 +0800
From: 路旭 <luxu.kernel@...edance.com>
To: "Paul Walmsley" <pjw@...nel.org>
Cc: <patchwork-bot+linux-riscv@...nel.org>, 
	<linux-riscv@...ts.infradead.org>, <corbet@....net>, 
	<paul.walmsley@...ive.com>, <palmer@...belt.com>, 
	<aou@...s.berkeley.edu>, <alex@...ti.fr>, <robh@...nel.org>, 
	<krzk+dt@...nel.org>, <conor+dt@...nel.org>, <will@...nel.org>, 
	<peterz@...radead.org>, <boqun.feng@...il.com>, <mark.rutland@....com>, 
	<anup@...infault.org>, <atish.patra@...ux.dev>, <pbonzini@...hat.com>, 
	<shuah@...nel.org>, <parri.andrea@...il.com>, <ajones@...tanamicro.com>, 
	<brs@...osinc.com>, <guoren@...nel.org>, <linux-doc@...r.kernel.org>, 
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>, 
	<kvm@...r.kernel.org>, <kvm-riscv@...ts.infradead.org>, 
	<linux-kselftest@...r.kernel.org>, <apw@...onical.com>, 
	<joe@...ches.com>, <lukas.bulwahn@...il.com>
Subject: Re: [PATCH v4 00/10] riscv: Add Zalasr ISA extension support

Hi Paul,

I will continue with this work. And thanks for Andrea's feedback.

Best Regards,
Xu Lu

> From: "Paul Walmsley"<pjw@...nel.org>
> Date:  Wed, Nov 19, 2025, 23:42
> Subject:  Re: [PATCH v4 00/10] riscv: Add Zalasr ISA extension support
> To: <patchwork-bot+linux-riscv@...nel.org>
> Cc: "Xu Lu"<luxu.kernel@...edance.com>, <linux-riscv@...ts.infradead.org>, <corbet@....net>, <paul.walmsley@...ive.com>, <palmer@...belt.com>, <aou@...s.berkeley.edu>, <alex@...ti.fr>, <robh@...nel.org>, <krzk+dt@...nel.org>, <conor+dt@...nel.org>, <will@...nel.org>, <peterz@...radead.org>, <boqun.feng@...il.com>, <mark.rutland@....com>, <anup@...infault.org>, <atish.patra@...ux.dev>, <pbonzini@...hat.com>, <shuah@...nel.org>, <parri.andrea@...il.com>, <ajones@...tanamicro.com>, <brs@...osinc.com>, <guoren@...nel.org>, <linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>, <kvm@...r.kernel.org>, <kvm-riscv@...ts.infradead.org>, <linux-kselftest@...r.kernel.org>, <apw@...onical.com>, <joe@...ches.com>, <lukas.bulwahn@...il.com>
> Folks,

> 
> On Wed, 19 Nov 2025, patchwork-bot+linux-riscv@...nel.org wrote:

> 
> > This series was applied to riscv/linux.git (for-next)

> > by Paul Walmsley <pjw@...nel.org>:

> 
> This actually isn't true; I've only applied the first four patches (see 

> below).

> 
> > On Mon, 20 Oct 2025 12:20:46 +0800 you wrote:

> > > This patch adds support for the Zalasr ISA extension, which supplies the

> > > real load acquire/store release instructions.

> > > 

> > > The specification can be found here:

> > > https://github.com/riscv/riscv-zalasr/blob/main/chapter2.adoc

> > > 

> > > This patch seires has been tested with ltp on Qemu with Brensan's zalasr

> > > support patch[1].

> > > 

> > > [...]

> > 

> > Here is the summary with links:

> >   - [v4,01/10] riscv: Add ISA extension parsing for Zalasr

> >     https://git.kernel.org/riscv/c/0597b9c8627e

> >   - [v4,02/10] dt-bindings: riscv: Add Zalasr ISA extension description

> >     https://git.kernel.org/riscv/c/6e2a0ff70abe

> >   - [v4,03/10] riscv: hwprobe: Export Zalasr extension

> >     https://git.kernel.org/riscv/c/d5e20628a882

> >   - [v4,04/10] riscv: Introduce Zalasr instructions

> >     https://git.kernel.org/riscv/c/c4139ea6717c

> >   - [v4,05/10] riscv: Apply Zalasr to smp_load_acquire/smp_store_release

> >     (no matching commit)

> >   - [v4,06/10] riscv: Apply acquire/release semantics to arch_xchg/arch_cmpxchg operations

> >     (no matching commit)

> >   - [v4,07/10] riscv: Apply acquire/release semantics to arch_atomic operations

> >     (no matching commit)

> >   - [v4,08/10] riscv: Remove arch specific __atomic_acquire/release_fence

> >     (no matching commit)

> >   - [v4,09/10] RISC-V: KVM: Allow Zalasr extensions for Guest/VM

> >     (no matching commit)

> >   - [v4,10/10] RISC-V: KVM: selftests: Add Zalasr extensions to get-reg-list test

> >     (no matching commit)

> 
> In terms of patches 5-8, we're still waiting for Xu Lu to update the 

> patches based on Andrea's feedback.  Xu Lu, are you still planning to 

> update these?

> 
> 
> - Paul
>