From: Steve Capper <steve.capper@arm.com>
To: linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org
Cc: catalin.marinas@arm.com, will.deacon@arm.com,
ard.biesheuvel@linaro.org, suzuki.poulose@arm.com,
jcm@redhat.com, Steve Capper <steve.capper@arm.com>
Subject: [PATCH V5 3/7] arm64: mm: Define arch_get_mmap_end, arch_get_mmap_base
Date: Thu, 6 Dec 2018 22:50:38 +0000 [thread overview]
Message-ID: <20181206225042.11548-4-steve.capper@arm.com> (raw)
In-Reply-To: <20181206225042.11548-1-steve.capper@arm.com>
Now that we have DEFAULT_MAP_WINDOW defined, we can arch_get_mmap_end
and arch_get_mmap_base helpers to allow for high addresses in mmap.
Signed-off-by: Steve Capper <steve.capper@arm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
---
arch/arm64/include/asm/processor.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index 50586ca6bacb..fe95fd8b065e 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h
@@ -72,6 +72,13 @@
#define STACK_TOP STACK_TOP_MAX
#endif /* CONFIG_COMPAT */
+#define arch_get_mmap_end(addr) ((addr > DEFAULT_MAP_WINDOW) ? TASK_SIZE :\
+ DEFAULT_MAP_WINDOW)
+
+#define arch_get_mmap_base(addr, base) ((addr > DEFAULT_MAP_WINDOW) ? \
+ base + TASK_SIZE - DEFAULT_MAP_WINDOW :\
+ base)
+
extern phys_addr_t arm64_dma_phys_limit;
#define ARCH_LOW_ADDRESS_LIMIT (arm64_dma_phys_limit - 1)
--
2.19.2
next prev parent reply other threads:[~2018-12-06 22:51 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-06 22:50 [PATCH V5 0/7] 52-bit userspace VAs Steve Capper
2018-12-06 22:50 ` [PATCH V5 1/7] mm: mmap: Allow for "high" userspace addresses Steve Capper
2018-12-07 19:56 ` Andrew Morton
2018-12-06 22:50 ` [PATCH V5 2/7] arm64: mm: Introduce DEFAULT_MAP_WINDOW Steve Capper
2018-12-06 22:50 ` Steve Capper [this message]
2018-12-06 22:50 ` [PATCH V5 4/7] arm64: mm: Offset TTBR1 to allow 52-bit PTRS_PER_PGD Steve Capper
2018-12-07 11:21 ` Catalin Marinas
2018-12-07 12:04 ` Suzuki K Poulose
2018-12-06 22:50 ` [PATCH V5 5/7] arm64: mm: Prevent mismatched 52-bit VA support Steve Capper
2018-12-07 10:47 ` Suzuki K Poulose
2018-12-07 15:26 ` Will Deacon
2018-12-07 17:28 ` Suzuki K Poulose
2018-12-10 13:36 ` Will Deacon
2018-12-10 16:04 ` Steve Capper
2018-12-10 16:18 ` Will Deacon
2018-12-10 16:55 ` Steve Capper
2018-12-10 17:08 ` Steve Capper
2018-12-10 17:42 ` Steve Capper
2018-12-10 18:07 ` Suzuki K Poulose
2018-12-06 22:50 ` [PATCH V5 6/7] arm64: mm: introduce 52-bit userspace support Steve Capper
2018-12-07 11:55 ` Catalin Marinas
2018-12-06 22:50 ` [PATCH V5 7/7] arm64: mm: Allow forcing all userspace addresses to 52-bit Steve Capper
2018-12-10 19:34 ` [PATCH V5 0/7] 52-bit userspace VAs Will Deacon
2018-12-11 9:13 ` Steve Capper
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20181206225042.11548-4-steve.capper@arm.com \
--to=steve.capper@arm.com \
--cc=ard.biesheuvel@linaro.org \
--cc=catalin.marinas@arm.com \
--cc=jcm@redhat.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-mm@kvack.org \
--cc=suzuki.poulose@arm.com \
--cc=will.deacon@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox