From: kristina.martsenko@arm.com (Kristina Martsenko)
To: linux-arm-kernel@lists.infradead.org
Subject: [RFC 7/9] arm64: increase PHYS_MASK to 52 bits
Date: Tue, 21 Nov 2017 11:58:03 +0000 [thread overview]
Message-ID: <1511265485-27163-8-git-send-email-kristina.martsenko@arm.com> (raw)
In-Reply-To: <1511265485-27163-1-git-send-email-kristina.martsenko@arm.com>
PHYS_MASK_SHIFT represents the highest possible physical address
supported by the kernel, and is used in a number of places. In order to
support 52-bit physical memory, increase PHYS_MASK_SHIFT to 52 when
52-bit physical memory is configured, and retain 48 if it is not, to
e.g. keep IDMAP_PGTABLE_LEVELS accurate.
Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
---
arch/arm64/include/asm/pgtable-hwdef.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h
index 69cc40695164..ab3eddb2e21b 100644
--- a/arch/arm64/include/asm/pgtable-hwdef.h
+++ b/arch/arm64/include/asm/pgtable-hwdef.h
@@ -199,7 +199,7 @@
/*
* Highest possible physical address supported.
*/
-#define PHYS_MASK_SHIFT (48)
+#define PHYS_MASK_SHIFT (CONFIG_ARM64_PA_BITS)
#define PHYS_MASK ((UL(1) << PHYS_MASK_SHIFT) - 1)
/*
--
2.1.4
next prev parent reply other threads:[~2017-11-21 11:58 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-21 11:57 [RFC 0/9] arm64: 52-bit physical address support Kristina Martsenko
2017-11-21 11:57 ` [RFC 1/9] arm64: add kconfig symbol to enable 52-bit PA Kristina Martsenko
2017-11-21 11:57 ` [RFC 2/9] arm64: limit PA size to supported range Kristina Martsenko
2017-11-21 11:57 ` [RFC 3/9] arm64: handle 52-bit addresses in TTBR Kristina Martsenko
2017-11-21 14:39 ` Robin Murphy
2017-12-07 12:29 ` Kristina Martsenko
2017-12-07 14:51 ` Robin Murphy
2017-12-13 16:28 ` Kristina Martsenko
2017-11-21 11:58 ` [RFC 4/9] arm64: head.S: handle 52-bit PAs in PTEs in early page table setup Kristina Martsenko
2017-11-21 11:58 ` [RFC 5/9] arm64: don't open code page table entry creation Kristina Martsenko
2017-11-21 11:58 ` [RFC 6/9] arm64: handle 52-bit physical addresses in page table entries Kristina Martsenko
2017-11-21 11:58 ` Kristina Martsenko [this message]
2017-11-21 11:58 ` [RFC 8/9] arm64: increase sparsemem MAX_PHYSMEM_BITS to 52 Kristina Martsenko
2017-11-21 11:58 ` [RFC 9/9] arm64: allow ID map to be extended to 52 bits Kristina Martsenko
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