linux-kernel - [RFC PATCH v2 19/21] riscv: Kconfig: Adjust mmap rnd bits for 64K Page

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Message-Id: <20241205103729.14798-20-luxu.kernel@bytedance.com>
Date: Thu,  5 Dec 2024 18:37:27 +0800
From: Xu Lu <luxu.kernel@...edance.com>
To: paul.walmsley@...ive.com,
	palmer@...belt.com,
	aou@...s.berkeley.edu,
	ardb@...nel.org,
	anup@...infault.org,
	atishp@...shpatra.org
Cc: xieyongji@...edance.com,
	lihangjing@...edance.com,
	punit.agrawal@...edance.com,
	linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org,
	Xu Lu <luxu.kernel@...edance.com>
Subject: [RFC PATCH v2 19/21] riscv: Kconfig: Adjust mmap rnd bits for 64K Page

Signed-off-by: Xu Lu <luxu.kernel@...edance.com>
---
 arch/riscv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 592eb5766029..9dfe95a12890 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -253,6 +253,7 @@ config ARCH_MMAP_RND_COMPAT_BITS_MIN
 # max bits determined by the following formula:
 #  VA_BITS - PAGE_SHIFT - 3
 config ARCH_MMAP_RND_BITS_MAX
+	default 20 if 64BIT && RISCV_64K_PAGES # SV39 based
 	default 24 if 64BIT # SV39 based
 	default 17
 
-- 
2.20.1