From: liush <liush@allwinnertech.com>
To: paul.walmsley@sifive.com, palmer@dabbelt.com,
aou@eecs.berkeley.edu, akpm@linux-foundation.org,
peterx@redhat.com, walken@google.com, daniel.m.jordan@oracle.com,
vbabka@suse.cz, rppt@kernel.org
Cc: liush <liush@allwinnertech.com>,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] riscv: fix pfn_to_virt err in do_page_fault().
Date: Thu, 17 Sep 2020 15:25:49 +0800 [thread overview]
Message-ID: <1600327549-3995-1-git-send-email-liush@allwinnertech.com> (raw)
The argument to pfn_to_virt() should be pfn not the value of CSR_SATP.
Signed-off-by: liush <liush@allwinnertech.com>
---
arch/riscv/mm/fault.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c
index 716d64e..9b4e088 100644
--- a/arch/riscv/mm/fault.c
+++ b/arch/riscv/mm/fault.c
@@ -212,7 +212,7 @@ asmlinkage void do_page_fault(struct pt_regs *regs)
* of a task switch.
*/
index = pgd_index(addr);
- pgd = (pgd_t *)pfn_to_virt(csr_read(CSR_SATP)) + index;
+ pgd = (pgd_t *)pfn_to_virt(csr_read(CSR_SATP) & SATP_PPN) + index;
pgd_k = init_mm.pgd + index;
if (!pgd_present(*pgd_k))
--
2.7.4
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next reply other threads:[~2020-09-17 7:26 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-17 7:25 liush [this message]
2020-09-17 7:59 ` [PATCH] riscv: fix pfn_to_virt err in do_page_fault() Anup Patel
2020-09-17 15:25 ` Christoph Hellwig
2020-09-18 7:43 ` 回复：[PATCH] " 刘邵华BTD
2020-09-28 9:31 ` fuyao
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