From: panand@redhat.com (Pratyush Anand)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/2] kexec-tools: arm64: Enable D-cache in purgatory
Date: Tue, 23 May 2017 10:32:07 +0530 [thread overview]
Message-ID: <cover.1495514291.git.panand@redhat.com> (raw)
It takes more that 2 minutes to verify SHA in purgatory when vmlinuz image
is around 13MB and initramfs is around 30MB. It takes more than 20 second
even when we have -O2 optimization enabled. However, if dcache is enabled
during purgatory execution then, it takes just a second in SHA
verification.
Therefore, these patches adds support for dcache enabling facility during
purgatory execution.
Changes since V2:
- typo in name create_block_entry() fixed
- moved shared definition between kexec and purgatory to a common
file.
- MT_NORMAL as 0
- PTRS_PER_* and other calculation around pmd_index() etc have
been defined like in kernel
- page table size has been kept for 5 tables, with comment about
expansion
- Pass only virt address to create_block_entry() now
- Addresses in kexec and purgatory domain have been defined as
host_addr_t and guest_addr_t respectively for clear code reading
Changes since V1:
- Moved page table creation logic from purgatory to kexec code.
- Only 4K page table is supported, with 48 bit VA and 2M block size
- if platform supports a 4K page size, then D-cache is always
enabled now.
Pratyush Anand (2):
kexec: arm64: create identity page table to be used in purgatory
arm64: enable d-cache support during purgatory sha verification
kexec/arch/arm64/kexec-arm64.c | 119 +++++++++++++++
kexec/arch/arm64/kexec-mmu.h | 76 ++++++++++
purgatory/arch/arm64/Makefile | 1 +
purgatory/arch/arm64/cache.S | 264 +++++++++++++++++++++++++++++++++
purgatory/arch/arm64/purgatory-arm64.c | 5 +
5 files changed, 465 insertions(+)
create mode 100644 kexec/arch/arm64/kexec-mmu.h
create mode 100644 purgatory/arch/arm64/cache.S
--
2.9.3
next reply other threads:[~2017-05-23 5:02 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-23 5:02 Pratyush Anand [this message]
2017-05-23 5:02 ` [PATCH v3 1/2] kexec: arm64: create identity page table to be used in purgatory Pratyush Anand
2017-06-02 8:24 ` James Morse
2017-06-02 14:29 ` Pratyush Anand
2017-05-23 5:02 ` [PATCH v3 2/2] arm64: enable d-cache support during purgatory sha verification Pratyush Anand
2017-06-02 8:23 ` [PATCH v3 0/2] kexec-tools: arm64: Enable D-cache in purgatory James Morse
2017-06-02 9:55 ` Ard Biesheuvel
2017-06-02 11:15 ` Bhupesh SHARMA
2017-06-02 11:36 ` Ard Biesheuvel
2017-06-02 11:44 ` Ard Biesheuvel
2017-06-02 14:32 ` Pratyush Anand
2017-06-02 16:36 ` James Morse
2017-06-02 14:42 ` Pratyush Anand
[not found] ` <CAB=otbT23ySN4VC6G0sBKF5p4SvsnG8PS-C_beBgn8YJUsbw9Q@mail.gmail.com>
2018-04-04 12:45 ` Kostiantyn Iarmak
2018-04-04 13:04 ` Kostiantyn Iarmak
2018-04-04 13:28 ` James Morse
2018-04-04 22:55 ` Ard Biesheuvel
2018-04-05 1:47 ` AKASHI Takahiro
2018-04-06 18:15 ` Kostiantyn Iarmak
2018-04-11 15:59 ` Geoff Levand
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