From: Vincent Chen <vincent.chen@sifive.com>
To: paul.walmsley@sifive.com, palmer@sifive.com, aou@eecs.berkeley.edu
Cc: Vincent Chen <vincent.chen@sifive.com>,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/2] riscv: Make __fstate_clean() can work correctly.
Date: Thu, 8 Aug 2019 15:58:41 +0800 [thread overview]
Message-ID: <1565251121-28490-3-git-send-email-vincent.chen@sifive.com> (raw)
In-Reply-To: <1565251121-28490-1-git-send-email-vincent.chen@sifive.com>
Make the __fstate_clean() function can correctly set the
state of sstatus.FS in pt_regs to SR_FS_CLEAN.
Tested on both QEMU and HiFive Unleashed using BBL + Linux.
Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
---
arch/riscv/include/asm/switch_to.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/include/asm/switch_to.h b/arch/riscv/include/asm/switch_to.h
index d5fe573..544f99a 100644
--- a/arch/riscv/include/asm/switch_to.h
+++ b/arch/riscv/include/asm/switch_to.h
@@ -16,7 +16,7 @@ extern void __fstate_restore(struct task_struct *restore_from);
static inline void __fstate_clean(struct pt_regs *regs)
{
- regs->sstatus |= (regs->sstatus & ~(SR_FS)) | SR_FS_CLEAN;
+ regs->sstatus = (regs->sstatus & ~(SR_FS)) | SR_FS_CLEAN;
}
static inline void fstate_off(struct task_struct *task,
--
2.7.4
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next prev parent reply other threads:[~2019-08-08 8:00 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-08 7:58 [PATCH 0/2] riscv: Correct the initialized flow of FP and __fstate_clean() Vincent Chen
2019-08-08 7:58 ` [PATCH 1/2] riscv: Correct the initialized flow of FP register Vincent Chen
2019-08-08 10:15 ` Anup Patel
2019-08-08 15:50 ` Paul Walmsley
2019-08-14 1:45 ` Vincent Chen
2019-08-14 3:51 ` Anup Patel
2019-08-12 14:58 ` Christoph Hellwig
2019-08-14 1:52 ` Vincent Chen
2019-08-08 7:58 ` Vincent Chen [this message]
2019-08-08 10:17 ` [PATCH 2/2] riscv: Make __fstate_clean() can work correctly Anup Patel
2019-08-14 1:55 ` Vincent Chen
2019-08-12 14:59 ` Christoph Hellwig
2019-08-14 1:55 ` Vincent Chen
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