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powerpc/32: enter syscall with MSR_EE inconditionaly set

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syscalls are expected to be entered with MSR_EE set. Lets
make it inconditional by forcing MSR_EE on syscalls.

This patch adds EXC_XFER_SYS for that.

Suggested-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[splited out from benh RFC patch]

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Leroy
2019-04-30 12:38:58 +00:00
committed by Michael Ellerman
parent ef4291243f
commit f97dec21a3
7 changed files with 13 additions and 5 deletions
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2
arch/powerpc/kernel/head_fsl_booke.S
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@@ -414,7 +414,7 @@ interrupt_base:
/* System Call Interrupt */
START_EXCEPTION(SystemCall)
NORMAL_EXCEPTION_PROLOG(SYSCALL)
EXC_XFER_EE_LITE(0x0c00, DoSyscall)
EXC_XFER_SYS(0x0c00, DoSyscall)
/* Auxiliary Processor Unavailable Interrupt */
EXCEPTION(0x2900, AP_UNAVAIL, AuxillaryProcessorUnavailable, \