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From: Pratyush Anand <panand@redhat.com>
To: horms@verge.net.au, james.morse@arm.com
Cc: mark.rutland@arm.com, Pratyush Anand <panand@redhat.com>,
	bhe@redhat.com, kexec@lists.infradead.org, dyoung@redhat.com,
	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


_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
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

             reply	other threads:[~2017-05-23  5:03 UTC|newest]

Thread overview: 40+ 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 0/2] kexec-tools: arm64: Enable D-cache in purgatory Pratyush Anand
2017-05-23  5:02 ` [PATCH v3 1/2] kexec: arm64: create identity page table to be used " Pratyush Anand
2017-05-23  5:02   ` Pratyush Anand
2017-06-02  8:24   ` James Morse
2017-06-02  8:24     ` James Morse
2017-06-02 14:29     ` Pratyush Anand
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
2017-05-23  5:02   ` Pratyush Anand
2017-06-02  8:23 ` [PATCH v3 0/2] kexec-tools: arm64: Enable D-cache in purgatory James Morse
2017-06-02  8:23   ` James Morse
2017-06-02  9:55   ` Ard Biesheuvel
2017-06-02  9:55     ` Ard Biesheuvel
2017-06-02 11:15     ` Bhupesh SHARMA
2017-06-02 11:15       ` Bhupesh SHARMA
2017-06-02 11:36       ` Ard Biesheuvel
2017-06-02 11:36         ` Ard Biesheuvel
2017-06-02 11:44         ` Ard Biesheuvel
2017-06-02 11:44           ` Ard Biesheuvel
2017-06-02 14:32           ` Pratyush Anand
2017-06-02 14:32             ` Pratyush Anand
2017-06-02 16:36       ` James Morse
2017-06-02 16:36         ` James Morse
2017-06-02 14:42   ` Pratyush Anand
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 12:45         ` Kostiantyn Iarmak
2018-04-04 13:04         ` Kostiantyn Iarmak
2018-04-04 13:04           ` Kostiantyn Iarmak
2018-04-04 13:28         ` James Morse
2018-04-04 13:28           ` James Morse
2018-04-04 22:55           ` Ard Biesheuvel
2018-04-04 22:55             ` Ard Biesheuvel
2018-04-05  1:47           ` AKASHI Takahiro
2018-04-05  1:47             ` AKASHI Takahiro
2018-04-06 18:15           ` Kostiantyn Iarmak
2018-04-06 18:15             ` Kostiantyn Iarmak
2018-04-11 15:59           ` Geoff Levand
2018-04-11 15:59             ` Geoff Levand

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