From: Xu Lu <luxu.kernel@bytedance.com>
To: paul.walmsley@sifive.com, palmer@dabbelt.com,
aou@eecs.berkeley.edu, ardb@kernel.org, anup@brainfault.org,
atishp@atishpatra.org
Cc: xieyongji@bytedance.com, lihangjing@bytedance.com,
punit.agrawal@bytedance.com, linux-kernel@vger.kernel.org,
linux-riscv@lists.infradead.org,
Xu Lu <luxu.kernel@bytedance.com>
Subject: [RFC PATCH v2 18/21] riscv: Kconfig: Introduce 64K page size
Date: Thu, 5 Dec 2024 18:37:26 +0800 [thread overview]
Message-ID: <20241205103729.14798-19-luxu.kernel@bytedance.com> (raw)
In-Reply-To: <20241205103729.14798-1-luxu.kernel@bytedance.com>
This patch introduces new config to control whether enabling the 64K
base page feature on RISC-V.
The 64K config will set software page size as 64K and automatically use
svnapot to accelerate basic page mapping.
Signed-off-by: Xu Lu <luxu.kernel@bytedance.com>
---
arch/riscv/Kconfig | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 2c0cb175a92a..592eb5766029 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -167,7 +167,6 @@ config RISCV
select HAVE_LD_DEAD_CODE_DATA_ELIMINATION if !LD_IS_LLD
select HAVE_MOVE_PMD
select HAVE_MOVE_PUD
- select HAVE_PAGE_SIZE_4KB
select HAVE_PCI
select HAVE_PERF_EVENTS
select HAVE_PERF_REGS
@@ -885,6 +884,28 @@ config RISCV_BOOT_SPINWAIT
If unsure what to do here, say N.
+choice
+ prompt "Page size"
+ default RISCV_4K_PAGES
+ help
+ Page size (translation granule) configuration.
+
+config RISCV_4K_PAGES
+ bool "4KB"
+ select HAVE_PAGE_SIZE_4KB
+ help
+ This feature enables 4KB pages support.
+
+config RISCV_64K_PAGES
+ bool "64KB"
+ depends on RISCV_ISA_SVNAPOT && 64BIT
+ select HAVE_PAGE_SIZE_64KB
+ select RISCV_USE_SW_PAGE
+ help
+ This feature enables 64KB pages support.
+
+endchoice
+
config ARCH_SUPPORTS_KEXEC
def_bool y
--
2.20.1
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next prev parent reply other threads:[~2024-12-05 10:45 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-05 10:37 [RFC PATCH v2 00/21] riscv: Introduce 64K base page Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 01/21] riscv: mm: Distinguish hardware base page and software " Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 02/21] riscv: mm: Configure satp with hw page pfn Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 03/21] riscv: mm: Reimplement page table entry structures Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 04/21] riscv: mm: Reimplement page table entry constructor function Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 05/21] riscv: mm: Reimplement conversion functions between page table entry Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 06/21] riscv: mm: Avoid pte constructor during pte conversion Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 07/21] riscv: mm: Reimplement page table entry get function Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 08/21] riscv: mm: Reimplement page table entry atomic " Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 09/21] riscv: mm: Replace READ_ONCE with atomic pte " Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 10/21] riscv: mm: Reimplement PTE A/D bit check function Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 11/21] riscv: mm: Reimplement mk_huge_pte function Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 12/21] riscv: mm: Reimplement tlb flush function Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 13/21] riscv: mm: Adjust PGDIR/P4D/PUD/PMD_SHIFT Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 14/21] riscv: mm: Only apply svnapot region bigger than software page Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 15/21] riscv: mm: Adjust FIX_BTMAPS_SLOTS for variable PAGE_SIZE Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 16/21] riscv: mm: Adjust FIX_FDT_SIZE for variable PMD_SIZE Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 17/21] riscv: mm: Apply Svnapot for base page mapping if possible Xu Lu
2024-12-05 10:37 ` Xu Lu [this message]
2024-12-05 10:37 ` [RFC PATCH v2 19/21] riscv: Kconfig: Adjust mmap rnd bits for 64K Page Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 20/21] riscv: mm: Adjust address space layout and init page table " Xu Lu
2024-12-05 10:37 ` [RFC PATCH v2 21/21] riscv: mm: Update EXEC_PAGESIZE " Xu Lu
2024-12-06 2:00 ` [RFC PATCH v2 00/21] riscv: Introduce 64K base page Zi Yan
2024-12-06 2:41 ` [External] " Xu Lu
2024-12-06 10:13 ` David Hildenbrand
2024-12-06 13:42 ` [External] " Xu Lu
2024-12-06 18:48 ` Pedro Falcato
2024-12-07 8:03 ` Xu Lu
2024-12-07 22:02 ` Yu Zhao
2024-12-09 3:36 ` Xu Lu
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