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
