From: Jeremy Linton <jeremy.linton@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, will.deacon@arm.com,
linux-kernel@vger.kernel.org, dwoods@ezcip.com,
steve.capper@arm.com, shijie.huang@arm.com,
Jeremy Linton <jeremy.linton@arm.com>
Subject: [PATCH 3/7] arm64: PTE/PMD contiguous bit definition
Date: Wed, 16 Sep 2015 14:03:02 -0500 [thread overview]
Message-ID: <1442430186-9083-4-git-send-email-jeremy.linton@arm.com> (raw)
In-Reply-To: <1442430186-9083-1-git-send-email-jeremy.linton@arm.com>
Define the bit positions in the PTE and PMD for the
contiguous bit.
Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>
---
arch/arm64/include/asm/pgtable-hwdef.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 4489cf6..80eeebf 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -55,6 +55,13 @@
#define SECTION_MASK (~(SECTION_SIZE-1))
/*
+ * Contiguous page definitions.
+ */
+#define CONT_RANGE (_AC(1, UL) << CONT_SHIFT)
+#define CONT_RANGE_MASK ((CONT_RANGE-1) << PAGE_SHIFT)
+#define CONT_RANGE_OFFSET(addr) (((addr)>>PAGE_SHIFT)&(CONT_RANGE-1))
+
+/*
* Hardware page table definitions.
*
* Level 1 descriptor (PUD).
@@ -83,6 +90,7 @@
#define PMD_SECT_S (_AT(pmdval_t, 3) << 8)
#define PMD_SECT_AF (_AT(pmdval_t, 1) << 10)
#define PMD_SECT_NG (_AT(pmdval_t, 1) << 11)
+#define PMD_SECT_CONT (_AT(pmdval_t, 1) << 52)
#define PMD_SECT_PXN (_AT(pmdval_t, 1) << 53)
#define PMD_SECT_UXN (_AT(pmdval_t, 1) << 54)
@@ -105,6 +113,7 @@
#define PTE_AF (_AT(pteval_t, 1) << 10) /* Access Flag */
#define PTE_NG (_AT(pteval_t, 1) << 11) /* nG */
#define PTE_DBM (_AT(pteval_t, 1) << 51) /* Dirty Bit Mgmt */
+#define PTE_CONT (_AT(pteval_t, 1) << 52) /* Contiguous range */
#define PTE_PXN (_AT(pteval_t, 1) << 53) /* Privileged XN */
#define PTE_UXN (_AT(pteval_t, 1) << 54) /* User XN */
--
2.4.3
next prev parent reply other threads:[~2015-09-16 19:03 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-16 19:02 [PATCH 0/7] arm64: Use contigous PTE bit for the kernel linear mapping Jeremy Linton
2015-09-16 19:03 ` [PATCH 1/7] arm64: Add contiguous page flag shifts and constants Jeremy Linton
2015-09-16 19:03 ` [PATCH 2/7] arm64: Shorten lines which exceed 80 characters Jeremy Linton
2015-09-17 9:45 ` Catalin Marinas
2015-09-16 19:03 ` Jeremy Linton [this message]
2015-09-16 19:03 ` [PATCH 4/7] arm64: Macros to check/set/unset the contiguous bit Jeremy Linton
2015-09-16 19:03 ` [PATCH 5/7] arm64: Default kernel pages should be contiguous Jeremy Linton
2015-09-16 19:03 ` [PATCH 6/7] arm64: Make the kernel page dump utility aware of the CONT bit Jeremy Linton
2015-09-18 7:02 ` Huang Shijie
2015-09-18 8:35 ` Huang Shijie
2015-09-16 19:03 ` [PATCH 7/7] arm64: Mark kernel page ranges contiguous Jeremy Linton
2015-09-17 17:23 ` Steve Capper
2015-09-17 17:33 ` Jeremy Linton
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