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=?iso-8859-1?Q?Bj=F6rn_T=F6pel?= , =?iso-8859-1?Q?Cl=E9ment_L=E9ger?= , linux-riscv , LKML Subject: Re: [PATCH 4/8] riscv: Add PLATFORM_MAY_SUPPORT_RISCV_ISA_SVPBMT Kconfig option Message-ID: References: <20240506-compile_kernel_with_extensions-v1-0-5c25c134c097@rivosinc.com> <20240506-compile_kernel_with_extensions-v1-4-5c25c134c097@rivosinc.com> <11F5B269-05DD-448E-9F85-878E84A5654F@jrtc27.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Tue, May 07, 2024 at 01:39:14PM -0700, Charlie Jenkins wrote: > On Tue, May 07, 2024 at 06:40:52AM +0100, Jessica Clarke wrote: > > On 7 May 2024, at 02:40, Charlie Jenkins wrote: > > > > > > Svpbmt would not benefit from having PLATFORM_SUPPORTS_RISCV_ISA_SVPBMT > > > so just rename RISCV_ISA_SVPBMT to PLATFORM_MAY_SUPPORT_RISCV_ISA_SVPBMT > > > and move the definition to Kconfig.isa. > > > > > > Signed-off-by: Charlie Jenkins > > > --- > > > arch/riscv/Kconfig | 17 ----------------- > > > arch/riscv/Kconfig.isa | 17 +++++++++++++++++ > > > 2 files changed, 17 insertions(+), 17 deletions(-) > > > > > > diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig > > > index 9c3a4347953b..22303a3ab59e 100644 > > > --- a/arch/riscv/Kconfig > > > +++ b/arch/riscv/Kconfig > > > @@ -484,23 +484,6 @@ config RISCV_ALTERNATIVE_EARLY > > > help > > > Allows early patching of the kernel for special errata > > > > > > -config RISCV_ISA_SVPBMT > > > - bool "Svpbmt extension support for supervisor mode page-based memory types" > > > - depends on 64BIT && MMU > > > - depends on RISCV_ALTERNATIVE > > > - default y > > > - help > > > - Add support for the Svpbmt ISA-extension (Supervisor-mode: > > > - page-based memory types) in the kernel when it is detected at boot. > > > - > > > - The memory type for a page contains a combination of attributes > > > - that indicate the cacheability, idempotency, and ordering > > > - properties for access to that page. > > > - > > > - The Svpbmt extension is only available on 64-bit cpus. > > > - > > > - If you don't know what to do here, say Y. > > > - > > > config TOOLCHAIN_HAS_ZBB > > > bool > > > default y > > > diff --git a/arch/riscv/Kconfig.isa b/arch/riscv/Kconfig.isa > > > index 37585bcd763e..50e217dc5719 100644 > > > --- a/arch/riscv/Kconfig.isa > > > +++ b/arch/riscv/Kconfig.isa > > > @@ -168,3 +168,20 @@ config PLATFORM_SUPPORTS_RISCV_ISA_SVNAPOT > > > not support Svnapot. > > > > > > endchoice > > > + > > > +config RISCV_ISA_SVPBMT > > > > Hi Charlie, > > Despite the subject and body you haven’t renamed it in this patch? > > I didn't do a good job at explaining exactly what's happening here. The > config option "PLATFORM_MAY_SUPPORT_RISCV_ISA_SVPBMT" most closely > follows the semantics of what "RISCV_ISA_SVPBMT" previously was. This > patch changes "RISCV_ISA_SVPBMT" to mean that either > PLATFORM_MAY_SUPPORT_RISCV_ISA_SVPBMT or > PLATFORM_SUPPORTS_RISCV_ISA_SVNAPOT was selected. Disregard what I said... I was thinking about the other extensions and forgot this one was different. Thank you for pointing this out! I need to change this description to just say that the definition moved to Kconfig.isa. - Charlie > > - Charlie > > > > > Jess > > > > > + bool "Svpbmt extension support for supervisor mode page-based memory types" > > > + depends on 64BIT && MMU > > > + depends on RISCV_ALTERNATIVE > > > + default y > > > + help > > > + Add support for the Svpbmt ISA-extension (Supervisor-mode: > > > + page-based memory types) in the kernel when it is detected at boot. > > > + > > > + The memory type for a page contains a combination of attributes > > > + that indicate the cacheability, idempotency, and ordering > > > + properties for access to that page. > > > + > > > + The Svpbmt extension is only available on 64-bit cpus. > > > + > > > + If you don't know what to do here, say Y. > > > > > > -- > > > 2.44.0 > > > > > > > > > _______________________________________________ > > > linux-riscv mailing list > > > linux-riscv@lists.infradead.org > > > http://lists.infradead.org/mailman/listinfo/linux-riscv > >