Re: [PATCH 2/2] riscv: mm: Define DIRECT_MAP_PHYSMEM_END

Paul Walmsley <[email protected]> Thu, 4 Jun 2026 16:34:49 -0600 (MDT)

Newsgroups	dev.linux.lists.sophgo,org.infradead.lists.linux-riscv,org.kernel.vger.linux-kernel,org.kernel.vger.stable
Message-ID	<[email protected]>

On Mon, 9 Mar 2026, Vivian Wang wrote:

> On RISC-V, the actual mappable range of physical address space is
> dependent on the current MMU mode i.e. satp_mode (See
> Documentation/arch/riscv/vm-layout.rst).
> 
> Define the DIRECT_MAP_PHYSMEM_END macro based on the existing virtual
> address space layout macros to expose this information to
> get_free_mem_region(). Otherwise, it returns a region that couldn't be
> mapped, which breaks ZONE_DEVICE.
> 
> Cc: <[email protected]> # v6.13+
> Tested-by: Han Gao <[email protected]> # SG2044
> Signed-off-by: Vivian Wang <[email protected]>

Thanks, queued for v7.2.


- Paul