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| author | Nicholas Piggin <npiggin@gmail.com> | 2017-05-01 15:01:10 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-05-30 07:59:51 +0300 |
| commit | c07e1b8a27a1419cdd4af7a1def26d12bb24d2b1 (patch) | |
| tree | d9b24e3409ad890698a03417870a60e2a9808cb5 /arch/powerpc | |
| parent | f1fe5252018075e18d7f0c0e23ee173546420361 (diff) | |
| download | linux-c07e1b8a27a1419cdd4af7a1def26d12bb24d2b1.tar.xz | |
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>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal-wrappers.S | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S index f620572f891f..4ca6c26a56d5 100644 --- a/arch/powerpc/platforms/powernv/opal-wrappers.S +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S @@ -99,10 +99,10 @@ opal_return: lwz r4,8(r1); ld r5,PPC_LR_STKOFF(r1); ld r6,PACASAVEDMSR(r13); - mtspr SPRN_SRR0,r5; - mtspr SPRN_SRR1,r6; mtcr r4; - rfid + mtspr SPRN_HSRR0,r5; + mtspr SPRN_HSRR1,r6; + hrfid opal_real_call: mfcr r11 |