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armv8: layerscape: Enable routing SError exception

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In case SError happens at EL2, if SCR_EL3[EA] is not routing it to
EL3, and SCR_EL3[RW] is set to aarch64, setting HCR_EL2[AMO] routes
the exception to EL2. Otherwise this exception is not taken.

Signed-off-by: York Sun <york.sun@nxp.com>
This commit is contained in:
York Sun 2018-11-05 18:01:23 +00:00
parent 088d52cfa8
commit bb50569dc4
1 changed files with 9 additions and 0 deletions
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9
arch/arm/cpu/armv8/fsl-layerscape/lowlevel.S
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@ -71,6 +71,15 @@ ENDPROC(smp_kick_all_cpus)
ENTRY(lowlevel_init)
mov x29, lr /* Save LR */
/* unmask SError and abort */
msr daifclr, #4
/* Set HCR_EL2[AMO] so SError @EL2 is taken */
mrs x0, hcr_el2
orr x0, x0, #0x20 /* AMO */
msr hcr_el2, x0
isb
switch_el x1, 1f, 100f, 100f /* skip if not in EL3 */
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