From: Greentime Hu <greentime.hu@sifive.com>
To: greentime.hu@sifive.com, greentime@kernel.org,
anup@brainfault.org, palmer@dabbelt.com,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
rppt@linux.ibm.com, gkulkarni@marvell.com, will@kernel.org,
catalin.marinas@arm.com, mark.rutland@arm.com,
paul.walmsley@sifive.com, hch@lst.de
Subject: [RFC PATCH v2 1/4] riscv: Add support pte_protnone and pmd_protnone if CONFIG_NUMA_BALANCING
Date: Fri, 10 Jan 2020 18:46:24 +0800 [thread overview]
Message-ID: <1ff7e57f16cb43c8816b90716a872b8f0f101c42.1577694824.git.greentime.hu@sifive.com> (raw)
In-Reply-To: <cover.1577694824.git.greentime.hu@sifive.com>
In-Reply-To: <cover.1577694824.git.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 36ae01761352..9650a4ce073e 100644
--- a/arch/riscv/include/asm/pgtable.h
+++ b/arch/riscv/include/asm/pgtable.h
@@ -166,6 +166,11 @@ 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)
{
@@ -279,6 +284,21 @@ 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)
{
--
2.17.1
next prev parent reply other threads:[~2020-01-10 10:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 10:46 [RFC PATCH v2 0/4] riscv: Add numa support for riscv64 platform Greentime Hu
2020-01-10 10:46 ` Greentime Hu [this message]
2020-01-10 10:46 ` [RFC PATCH v2 2/4] riscv: Move unflatten_device_tree() to paging_init() because riscv_numa_init() needs the dt information Greentime Hu
2020-01-10 10:46 ` [RFC PATCH v2 3/4] riscv: Use variable this_cpu instead of smp_processor_id() Greentime Hu
2020-01-10 10:46 ` [RFC PATCH v2 4/4] riscv: Add numa support for riscv64 platform Greentime Hu
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