powerpc/64s: Fix OPAL_CALL non-maskable interrupt reentrancy
OPAL_CALL uses SRR[01] with MSR_RI=1, which gets corrupted if there is an interleaving system reset or machine check interrupt. Use HSRR[01] instead, which does not require MSR_RI=0. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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@ -99,10 +99,10 @@ opal_return:
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lwz r4,8(r1);
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lwz r4,8(r1);
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ld r5,PPC_LR_STKOFF(r1);
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ld r5,PPC_LR_STKOFF(r1);
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ld r6,PACASAVEDMSR(r13);
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ld r6,PACASAVEDMSR(r13);
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mtspr SPRN_SRR0,r5;
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mtspr SPRN_SRR1,r6;
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mtcr r4;
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mtcr r4;
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rfid
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mtspr SPRN_HSRR0,r5;
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mtspr SPRN_HSRR1,r6;
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hrfid
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opal_real_call:
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opal_real_call:
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mfcr r11
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mfcr r11
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