From: Atish Patra <atish.patra@wdc.com>
To: linux-kernel@vger.kernel.org
Cc: Greentime Hu <greentime.hu@sifive.com>,
Albert Ou <aou@eecs.berkeley.edu>,
Andrew Morton <akpm@linux-foundation.org>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Anup Patel <anup@brainfault.org>, Arnd Bergmann <arnd@arndb.de>,
Atish Patra <atish.patra@wdc.com>,
Catalin Marinas <catalin.marinas@arm.com>,
David Hildenbrand <david@redhat.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Jia He <justin.he@arm.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
linux-arch@vger.kernel.org, linux-riscv@lists.infradead.org,
Mike Rapoport <rppt@kernel.org>,
Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
Palmer Dabbelt <palmer@dabbelt.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Steven Price <steven.price@arm.com>,
Will Deacon <will@kernel.org>, Zong Li <zong.li@sifive.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v4 4/5] riscv: Add support pte_protnone and pmd_protnone if CONFIG_NUMA_BALANCING
Date: Mon, 5 Oct 2020 17:17:51 -0700 [thread overview]
Message-ID: <20201006001752.248564-5-atish.patra@wdc.com> (raw)
In-Reply-To: <20201006001752.248564-1-atish.patra@wdc.com>
From: Greentime Hu <greentime.hu@sifive.com>
These two functions are used to distinguish between PROT_NONENUMA
protections and hinting fault protections.
Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
---
arch/riscv/include/asm/pgtable.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h
index 515b42f98d34..2751110675e6 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -183,6 +183,11 @@ static inline unsigned long pmd_page_vaddr(pmd_t pmd)
return (unsigned long)pfn_to_virt(pmd_val(pmd) >> _PAGE_PFN_SHIFT);
}
+static inline pte_t pmd_pte(pmd_t pmd)
+{
+ return __pte(pmd_val(pmd));
+}
+
/* Yields the page frame number (PFN) of a page table entry */
static inline unsigned long pte_pfn(pte_t pte)
{
@@ -286,6 +291,21 @@ static inline pte_t pte_mkhuge(pte_t pte)
return pte;
}
+#ifdef CONFIG_NUMA_BALANCING
+/*
+ * See the comment in include/asm-generic/pgtable.h
+ */
+static inline int pte_protnone(pte_t pte)
+{
+ return (pte_val(pte) & (_PAGE_PRESENT | _PAGE_PROT_NONE)) == _PAGE_PROT_NONE;
+}
+
+static inline int pmd_protnone(pmd_t pmd)
+{
+ return pte_protnone(pmd_pte(pmd));
+}
+#endif
+
/* Modify page protection bits */
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
--
2.25.1
next prev parent reply other threads:[~2020-10-06 0:18 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-06 0:17 [PATCH v4 0/5] Unify NUMA implementation between ARM64 & RISC-V Atish Patra
2020-10-06 0:17 ` [PATCH v4 1/5] numa: Move numa implementation to common code Atish Patra
2020-10-06 0:17 ` [PATCH v4 2/5] arm64, numa: Change the numa init functions name to be generic Atish Patra
2020-11-06 17:14 ` Catalin Marinas
2020-11-06 17:33 ` Atish Patra
2020-11-06 19:08 ` Catalin Marinas
2020-11-07 0:53 ` Atish Patra
2020-10-06 0:17 ` [PATCH v4 3/5] riscv: Separate memory init from paging init Atish Patra
2020-10-22 5:37 ` Anup Patel
2020-11-05 17:34 ` Palmer Dabbelt
2020-10-06 0:17 ` Atish Patra [this message]
2020-10-22 5:38 ` [PATCH v4 4/5] riscv: Add support pte_protnone and pmd_protnone if CONFIG_NUMA_BALANCING Anup Patel
2020-11-05 17:34 ` Palmer Dabbelt
2020-10-06 0:17 ` [PATCH v4 5/5] riscv: Add numa support for riscv64 platform Atish Patra
2020-10-22 5:40 ` Anup Patel
2020-11-05 17:34 ` Palmer Dabbelt
2020-10-13 20:19 ` [PATCH v4 0/5] Unify NUMA implementation between ARM64 & RISC-V Atish Patra
2020-10-19 21:29 ` Palmer Dabbelt
2020-11-05 18:07 ` Palmer Dabbelt
2020-11-06 17:18 ` Catalin Marinas
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