Hi, I don't really like the idea of doing cache operations in purgatory. For fast reboot we have the --lite option to kexec, which will skip the digest calculations. Your 2 minutes seems like a long time. Is this seen on other platforms? -Geoff On Mon, 2015-05-04 at 18:32 +0530, Pratyush Anand wrote: > These patches add support for enable/disable d cache support. It reduces > time for sha verification from more than 2 min to 3-4 sec on my > platform. > There are some of the observation which I am unable to explain. > * It takes around 18 sec when I boot a kexec kernel and around 3-4 sec > * when I boot a crash kernel. In case of kexec kernel start of 1st > * segment is at 0000004000280000 and, end of last segment is at > * 00000040029c0000. In case of crash kernel start of 1st segment is at > * 00000041b9080000 and, end of last segment is at 00000041f9000000. > > Pratyush Anand (3): > arm64: Add enable/disable d-cache support for purgatory > arm64: Pass RAM boundary to purgatory > arm64: Enable/disable D-cache before/after sha verification > > kexec/arch/arm64/include/types.h | 16 +++ > kexec/arch/arm64/kexec-arm64.c | 16 ++- > purgatory/arch/arm64/Makefile | 1 + > purgatory/arch/arm64/cache.S | 222 +++++++++++++++++++++++++++++++++ > purgatory/arch/arm64/cache.h | 42 +++++++ > purgatory/arch/arm64/entry.S | 10 ++ > purgatory/arch/arm64/purgatory-arm64.c | 12 ++ > 7 files changed, 318 insertions(+), 1 deletion(-) > create mode 100644 kexec/arch/arm64/include/types.h > create mode 100644 purgatory/arch/arm64/cache.S > create mode 100644 purgatory/arch/arm64/cache.h >
