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powerpc/rtas: Call enter_rtas with MSR[EE] disabled

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Disable MSR[EE] in C code rather than asm.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220308135047.478297-5-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin
2022-03-08 23:50:37 +10:00
committed by Michael Ellerman
parent 4e949faae2
commit c5a65e0a42
2 changed files with 4 additions and 15 deletions
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4
arch/powerpc/kernel/rtas.c
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@@ -59,6 +59,10 @@ static inline void do_enter_rtas(unsigned long args)
msr = mfmsr();
BUG_ON(!(msr & MSR_RI));
BUG_ON(!irqs_disabled());
hard_irq_disable(); /* Ensure MSR[EE] is disabled on PPC64 */
enter_rtas(args);
srr_regs_clobbered(); /* rtas uses SRRs, invalidate */