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ppc: spapr: Handle "ibm,nmi-register" and "ibm,nmi-interlock" RTAS calls

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This patch adds support in QEMU to handle "ibm,nmi-register"
and "ibm,nmi-interlock" RTAS calls.

The machine check notification address is saved when the
OS issues "ibm,nmi-register" RTAS call.

This patch also handles the case when multiple processors
experience machine check at or about the same time by
handling "ibm,nmi-interlock" call. In such cases, as per
PAPR, subsequent processors serialize waiting for the first
processor to issue the "ibm,nmi-interlock" call. The second
processor that also received a machine check error waits
till the first processor is done reading the error log.
The first processor issues "ibm,nmi-interlock" call
when the error log is consumed.

Signed-off-by: Aravinda Prasad <arawinda.p@gmail.com>
[Register fwnmi RTAS calls in core_rtas_register_types()
 where other RTAS calls are registered]
Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com>
Message-Id: <20200130184423.20519-6-ganeshgr@linux.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Aravinda Prasad 2020-01-31 00:14:21 +05:30 • committed by David Gibson
parent 81fe70e443
commit f03496bc12
3 changed files with 72 additions and 1 deletions
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10
hw/ppc/spapr_caps.c
View file

@ -515,6 +515,16 @@ static void cap_fwnmi_mce_apply(SpaprMachineState *spapr, uint8_t val,
if (!val) {
return; /* Disabled by default */
}
if (tcg_enabled()) {
warn_report("Firmware Assisted Non-Maskable Interrupts(FWNMI) not "
"supported in TCG");
} else if (kvm_enabled()) {
if (kvmppc_set_fwnmi() < 0) {
error_setg(errp, "Firmware Assisted Non-Maskable Interrupts(FWNMI) "
"not supported by KVM");
}
}
}
SpaprCapabilityInfo capability_table[SPAPR_CAP_NUM] = {