From: Atish Patra <atish.patra@wdc.com>
To: linux-kernel@vger.kernel.org
Cc: Atish Patra <atish.patra@wdc.com>,
Albert Ou <aou@eecs.berkeley.edu>,
linux-riscv@lists.infradead.org,
Palmer Dabbelt <palmer@sifive.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
Christoph Hellwig <hch@lst.de>, Anup Patel <Anup.Patel@wdc.com>,
Andreas Schwab <schwab@linux-m68k.org>
Subject: [PATCH v3 2/3] RISC-V: Issue a tlb page flush if possible
Date: Wed, 21 Aug 2019 17:46:43 -0700 [thread overview]
Message-ID: <20190822004644.25829-3-atish.patra@wdc.com> (raw)
In-Reply-To: <20190822004644.25829-1-atish.patra@wdc.com>
If tlbflush request is for page only, there is no need to do a
complete local tlb shootdown.
Just do a local tlb flush for the given address.
Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
arch/riscv/mm/tlbflush.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/arch/riscv/mm/tlbflush.c b/arch/riscv/mm/tlbflush.c
index 36430ee3bed9..9f58b3790baa 100644
--- a/arch/riscv/mm/tlbflush.c
+++ b/arch/riscv/mm/tlbflush.c
@@ -22,7 +22,10 @@ static void __sbi_tlb_flush_range(struct cpumask *cmask, unsigned long start,
}
if (cpumask_test_cpu(cpuid, cmask) && cpumask_weight(cmask) == 1) {
- local_flush_tlb_all();
+ if (size <= PAGE_SIZE && size != -1)
+ local_flush_tlb_page(start);
+ else
+ local_flush_tlb_all();
goto done;
}
riscv_cpuid_to_hartid_mask(cmask, &hmask);
--
2.21.0
next prev parent reply other threads:[~2019-08-22 0:46 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-22 0:46 [PATCH v3 0/3] Optimize tlbflush path Atish Patra
2019-08-22 0:46 ` [PATCH v3 1/3] RISC-V: Issue a local tlbflush if possible Atish Patra
2019-08-22 1:46 ` Christoph Hellwig
2019-08-22 4:01 ` Atish Patra
2019-08-22 4:27 ` hch
2019-08-22 5:39 ` Atish Patra
2019-08-22 0:46 ` Atish Patra [this message]
2019-08-22 1:50 ` [PATCH v3 2/3] RISC-V: Issue a tlb page flush " Christoph Hellwig
2019-08-22 4:02 ` Atish Patra
2019-08-22 0:46 ` [PATCH v3 3/3] RISC-V: Do not invoke SBI call if cpumask is empty Atish Patra
2019-08-22 1:51 ` Christoph Hellwig
2019-08-22 4:23 ` Atish Patra
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