arm64: entry: convert el0_sync to C

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This is largely a 1-1 conversion of asm to C, with a couple of caveats.

The el0_sync{_compat} switches explicitly handle all the EL0 debug
cases, so el0_dbg doesn't have to try to bail out for unexpected EL1
debug ESR values. This also means that an unexpected vector catch from
AArch32 is routed to el0_inv.

We *could* merge the native and compat switches, which would make the
diffstat negative, but I've tried to stay as close to the existing
assembly as possible for the moment.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
[split out of a bigger series, added nokprobes. removed irq trace
 calls as the C helpers do this. renamed el0_dbg's use of FAR]
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Cc: Julien Thierry <julien.thierry.kdev@gmail.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Mark Rutland 2019-10-25 17:42:14 +01:00 • committed by Catalin Marinas

parent ed3768db58

commit 582f95835a

3 changed files with 227 additions and 211 deletions

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10

arch/arm64/include/asm/asm-uaccess.h

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222

arch/arm64/kernel/entry-common.c

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206

arch/arm64/kernel/entry.S

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