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FROMLIST: arm64: asm: Provide set_sctlr_el2 macro

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We will soon need to turn the EL2 stage 1 MMU on and off in nVHE
protected mode, so refactor the set_sctlr_el1 macro to make it usable
for that purpose.

Acked-by: Will Deacon <will@kernel.org>
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Link: https://lore.kernel.org/r/20210315143536.214621-17-qperret@google.com
Bug: 178098380
Change-Id: Ia1ae2a0e20ac1572da220572b3ca6bd3eaecca46
This commit is contained in:
Quentin Perret
2021-03-15 14:35:16 +00:00
parent ca52b29511
commit 364f0639db
1 changed files with 11 additions and 3 deletions
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14
arch/arm64/include/asm/assembler.h
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@@ -676,11 +676,11 @@ USER(\label, ic ivau, \tmp2) // invalidate I line PoU
.endm
/*
* Set SCTLR_EL1 to the passed value, and invalidate the local icache
* Set SCTLR_ELx to the @reg value, and invalidate the local icache
* in the process. This is called when setting the MMU on.
*/
.macro set_sctlr_el1, reg
msr sctlr_el1, \reg
.macro set_sctlr, sreg, reg
msr \sreg, \reg
isb
/*
* Invalidate the local I-cache so that any instructions fetched
@@ -692,6 +692,14 @@ USER(\label, ic ivau, \tmp2) // invalidate I line PoU
isb
.endm
.macro set_sctlr_el1, reg
set_sctlr sctlr_el1, \reg
.endm
.macro set_sctlr_el2, reg
set_sctlr sctlr_el2, \reg
.endm
/*
* Check whether to yield to another runnable task from kernel mode NEON code
* (which runs with preemption disabled).