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由 Geoff Levand 提交于
Commit 68234df4 ("arm64: kill flush_cache_all()") removed the global arm64 routines cpu_reset() and cpu_soft_restart() needed by the arm64 kexec and kdump support. Add back a simplified version of cpu_soft_restart() with some changes needed for kexec in the new files cpu_reset.S, and cpu_reset.h. When a CPU is reset it needs to be put into the exception level it had when it entered the kernel. Update cpu_soft_restart() to accept an argument which signals if the reset address should be entered at EL1 or EL2, and add a new hypercall HVC_SOFT_RESTART which is used for the EL2 switch. Signed-off-by: NGeoff Levand <geoff@infradead.org> Reviewed-by: NJames Morse <james.morse@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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