From: Atish Patra <atish.patra@wdc.com>
To: linux-kernel@vger.kernel.org
Cc: "Rafael J. Wysocki" <rafael@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Palmer Dabbelt <palmerdabbelt@google.com>,
Atish Patra <atish.patra@wdc.com>,
linux-riscv@lists.infradead.org, Will Deacon <will@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>,
linux-arch@vger.kernel.org,
Zhengyuan Liu <liuzhengyuan@tj.kylinos.cn>,
Baoquan He <bhe@redhat.com>, Anup Patel <anup@brainfault.org>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
Steven Price <steven.price@arm.com>,
Greentime Hu <greentime.hu@sifive.com>,
Albert Ou <aou@eecs.berkeley.edu>, Arnd Bergmann <arnd@arndb.de>,
Anshuman Khandual <anshuman.khandual@arm.com>,
Paul Walmsley <paul.walmsley@sifive.com>,
linux-arm-kernel@lists.infradead.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Palmer Dabbelt <palmer@dabbelt.com>,
Jonathan Cameron <Jonathan.Cameron@huawei.com>,
Andrew Morton <akpm@linux-foundation.org>,
Mike Rapoport <rppt@kernel.org>
Subject: [PATCH v5 4/5] riscv: Add support pte_protnone and pmd_protnone if CONFIG_NUMA_BALANCING
Date: Wed, 18 Nov 2020 16:38:28 -0800 [thread overview]
Message-ID: <20201119003829.1282810-5-atish.patra@wdc.com> (raw)
In-Reply-To: <20201119003829.1282810-1-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>
Reviewed-by: Anup Patel <anup@brainfault.org>
Reviewed-by: Palmer Dabbelt <palmerdabbelt@google.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 a0f8a86236e8..64aba4f7a0ed 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -187,6 +187,11 @@ 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)
{
@@ -290,6 +295,21 @@ 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
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next prev parent reply other threads:[~2020-11-19 0:39 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-19 0:38 [PATCH v5 0/5] Unify NUMA implementation between ARM64 & RISC-V Atish Patra
2020-11-19 0:38 ` [PATCH v5 1/5] arm64, numa: Change the numa init functions name to be generic Atish Patra
2020-11-19 0:38 ` [PATCH v5 2/5] numa: Move numa implementation to common code Atish Patra
2020-11-19 1:12 ` Randy Dunlap
2020-11-19 0:38 ` [PATCH v5 3/5] riscv: Separate memory init from paging init Atish Patra
2021-03-10 16:41 ` Geert Uytterhoeven
2021-03-12 15:50 ` Geert Uytterhoeven
2020-11-19 0:38 ` Atish Patra [this message]
2020-11-19 0:38 ` [PATCH v5 5/5] riscv: Add numa support for riscv64 platform Atish Patra
2020-12-14 1:02 ` [PATCH v5 0/5] Unify NUMA implementation between ARM64 & RISC-V Atish Patra
2021-01-09 20:51 ` Palmer Dabbelt
2021-01-11 19:31 ` Atish Patra
2021-01-14 5:21 ` Palmer Dabbelt
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