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
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