From: Ryan Roberts <ryan.roberts@arm.com>
To: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Ard Biesheuvel <ardb@kernel.org>,
Marc Zyngier <maz@kernel.org>,
Oliver Upton <oliver.upton@linux.dev>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Alexander Potapenko <glider@google.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Andrew Morton <akpm@linux-foundation.org>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Matthew Wilcox <willy@infradead.org>, Yu Zhao <yuzhao@google.com>,
Mark Rutland <mark.rutland@arm.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: [PATCH v1 10/14] arm64/mm: Split __flush_tlb_range() to elide trailing DSB
Date: Thu, 22 Jun 2023 15:42:05 +0100 [thread overview]
Message-ID: <20230622144210.2623299-11-ryan.roberts@arm.com> (raw)
In-Reply-To: <20230622144210.2623299-1-ryan.roberts@arm.com>
Split __flush_tlb_range() into __flush_tlb_range_nosync() +
__flush_tlb_range(), in the same way as the existing flush_tlb_page()
arrangement. This allows calling __flush_tlb_range_nosync() to elide the
trailing DSB. Forthcoming "contpte" code will take advantage of this
when clearing the young bit from a contiguous range of ptes.
Signed-off-by: Ryan Roberts <ryan.roberts@arm.com>
---
arch/arm64/include/asm/tlbflush.h | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h
index 412a3b9a3c25..de1f5d9a546e 100644
--- a/arch/arm64/include/asm/tlbflush.h
+++ b/arch/arm64/include/asm/tlbflush.h
@@ -278,7 +278,7 @@ static inline void flush_tlb_page(struct vm_area_struct *vma,
*/
#define MAX_TLBI_OPS PTRS_PER_PTE
-static inline void __flush_tlb_range(struct vm_area_struct *vma,
+static inline void __flush_tlb_range_nosync(struct vm_area_struct *vma,
unsigned long start, unsigned long end,
unsigned long stride, bool last_level,
int tlb_level)
@@ -357,6 +357,15 @@ static inline void __flush_tlb_range(struct vm_area_struct *vma,
}
scale++;
}
+}
+
+static inline void __flush_tlb_range(struct vm_area_struct *vma,
+ unsigned long start, unsigned long end,
+ unsigned long stride, bool last_level,
+ int tlb_level)
+{
+ __flush_tlb_range_nosync(vma, start, end, stride,
+ last_level, tlb_level);
dsb(ish);
}
--
2.25.1
next prev parent reply other threads:[~2023-06-22 14:43 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-22 14:41 [PATCH v1 00/14] Transparent Contiguous PTEs for User Mappings Ryan Roberts
2023-06-22 14:41 ` [PATCH v1 01/14] arm64/mm: set_pte(): New layer to manage contig bit Ryan Roberts
2023-06-22 14:41 ` [PATCH v1 02/14] arm64/mm: set_ptes()/set_pte_at(): " Ryan Roberts
2023-06-22 14:41 ` [PATCH v1 03/14] arm64/mm: pte_clear(): " Ryan Roberts
2023-06-22 14:41 ` [PATCH v1 04/14] arm64/mm: ptep_get_and_clear(): " Ryan Roberts
2023-06-22 14:42 ` [PATCH v1 05/14] arm64/mm: ptep_test_and_clear_young(): " Ryan Roberts
2023-06-22 14:42 ` [PATCH v1 06/14] arm64/mm: ptep_clear_flush_young(): " Ryan Roberts
2023-06-22 14:42 ` [PATCH v1 07/14] arm64/mm: ptep_set_wrprotect(): " Ryan Roberts
2023-06-22 14:42 ` [PATCH v1 08/14] arm64/mm: ptep_set_access_flags(): " Ryan Roberts
2023-06-22 14:42 ` [PATCH v1 09/14] arm64/mm: ptep_get(): " Ryan Roberts
2023-06-22 14:42 ` Ryan Roberts [this message]
2023-06-22 14:42 ` [PATCH v1 11/14] arm64/mm: Wire up PTE_CONT for user mappings Ryan Roberts
2023-06-30 1:54 ` John Hubbard
2023-07-03 9:48 ` Ryan Roberts
2023-07-03 15:17 ` Catalin Marinas
2023-07-04 11:09 ` Ryan Roberts
2023-07-05 13:13 ` Ryan Roberts
2023-07-16 15:09 ` Catalin Marinas
2023-06-22 14:42 ` [PATCH v1 12/14] arm64/mm: Add ptep_get_and_clear_full() to optimize process teardown Ryan Roberts
2023-06-22 14:42 ` [PATCH v1 13/14] mm: Batch-copy PTE ranges during fork() Ryan Roberts
2023-06-22 14:42 ` [PATCH v1 14/14] arm64/mm: Implement ptep_set_wrprotects() to optimize fork() Ryan Roberts
2023-07-10 12:05 ` [PATCH v1 00/14] Transparent Contiguous PTEs for User Mappings Barry Song
2023-07-10 13:28 ` Ryan Roberts
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