Commit c07e1b8a authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman

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: default avatarNicholas Piggin <npiggin@gmail.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent f1fe5252
...@@ -99,10 +99,10 @@ opal_return: ...@@ -99,10 +99,10 @@ opal_return:
lwz r4,8(r1); lwz r4,8(r1);
ld r5,PPC_LR_STKOFF(r1); ld r5,PPC_LR_STKOFF(r1);
ld r6,PACASAVEDMSR(r13); ld r6,PACASAVEDMSR(r13);
mtspr SPRN_SRR0,r5;
mtspr SPRN_SRR1,r6;
mtcr r4; mtcr r4;
rfid mtspr SPRN_HSRR0,r5;
mtspr SPRN_HSRR1,r6;
hrfid
opal_real_call: opal_real_call:
mfcr r11 mfcr r11
......
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