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Message-ID: <20230224104001.2743135-1-dylan@andestech.com>
Date: Fri, 24 Feb 2023 18:40:01 +0800
From: Dylan Jhong <dylan@...estech.com>
To: <linux-riscv@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC: <liushixin2@...wei.com>, <x5710999x@...il.com>,
<bjorn@...osinc.com>, <abrestic@...osinc.com>, <peterx@...hat.com>,
<hanchuanhua@...o.com>, <apopple@...dia.com>, <hca@...ux.ibm.com>,
<aou@...s.berkeley.edu>, <palmer@...belt.com>,
<paul.walmsley@...ive.com>, <tim609@...estech.com>,
<peterlin@...estech.com>, <ycliang@...estech.com>,
Dylan Jhong <dylan@...estech.com>
Subject: [PATCH] RISC-V: mm: Support huge page in vmalloc_fault()
RISC-V supports ioremap() with huge page (pud/pmd) mapping, but
vmalloc_fault() assumes that the vmalloc range is limited to pte
mappings. Add huge page support to complete the vmalloc_fault()
function.
Fixes: 310f541a027b ("riscv: Enable HAVE_ARCH_HUGE_VMAP for 64BIT")
Signed-off-by: Dylan Jhong <dylan@...estech.com>
---
arch/riscv/mm/fault.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c
index eb0774d9c03b..4b9953b47d81 100644
--- a/arch/riscv/mm/fault.c
+++ b/arch/riscv/mm/fault.c
@@ -143,6 +143,8 @@ static inline void vmalloc_fault(struct pt_regs *regs, int code, unsigned long a
no_context(regs, addr);
return;
}
+ if (pud_leaf(*pud_k))
+ goto flush_tlb;
/*
* Since the vmalloc area is global, it is unnecessary
@@ -153,6 +155,8 @@ static inline void vmalloc_fault(struct pt_regs *regs, int code, unsigned long a
no_context(regs, addr);
return;
}
+ if (pmd_leaf(*pmd_k))
+ goto flush_tlb;
/*
* Make sure the actual PTE exists as well to
@@ -172,6 +176,7 @@ static inline void vmalloc_fault(struct pt_regs *regs, int code, unsigned long a
* ordering constraint, not a cache flush; it is
* necessary even after writing invalid entries.
*/
+flush_tlb:
local_flush_tlb_page(addr);
}
--
2.34.1
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