linux-kernel - [PATCH v6 0/3] Add PMEM support for RISC-V

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Date:   Mon, 14 Nov 2022 14:35:33 +0530
From:   Anup Patel <apatel@...tanamicro.com>
To:     Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>
Cc:     Atish Patra <atishp@...shpatra.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Arnd Bergmann <arnd@...db.de>,
        Anup Patel <anup@...infault.org>,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Anup Patel <apatel@...tanamicro.com>
Subject: [PATCH v6 0/3] Add PMEM support for RISC-V

The Linux NVDIMM PEM drivers require arch support to map and access the
persistent memory device. This series adds RISC-V PMEM support using
recently added Svpbmt and Zicbom support.

First two patches are fixes and remaining two patches add the required
PMEM support for Linux RISC-V.

These patches can also be found in riscv_pmem_v6 branch at:
https://github.com/avpatel/linux.git

Changes since v5:
 - Rebased on Linux-6.1-rc5
 - Directly add pmem.o in obj-y of PATCH3
 - Dropped PATCH1 since this is already merged.

Changes since v4:
 - Simplify PATCH2 by implementing RISC-V specific arch_memremap_wb()

Changes since v3:
 - Pickup correct version of Drew's patch as PATCH1

Changes since v2:
 - Rebased on Linux-6.1-rc1
 - Replaced PATCH1 with the patch proposed by Drew

Changes since v1:
 - Fix error reported by test bot
   https://lore.kernel.org/all/202208272028.IwrNZ0Ur-lkp@intel.com/

Anup Patel (3):
  RISC-V: Fix MEMREMAP_WB for systems with Svpbmt
  RISC-V: Implement arch specific PMEM APIs
  RISC-V: Enable PMEM drivers

 arch/riscv/Kconfig           |  1 +
 arch/riscv/configs/defconfig |  1 +
 arch/riscv/include/asm/io.h  |  5 +++++
 arch/riscv/mm/Makefile       |  1 +
 arch/riscv/mm/pmem.c         | 21 +++++++++++++++++++++
 5 files changed, 29 insertions(+)
 create mode 100644 arch/riscv/mm/pmem.c

-- 
2.34.1