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[PATCH v3 0/4] ppc: reset the interrupt presenter from the CPU reset han
From: |
Cédric Le Goater |
Subject: |
[PATCH v3 0/4] ppc: reset the interrupt presenter from the CPU reset handler |
Date: |
Tue, 22 Oct 2019 09:22:42 +0200 |
Hello,
On the sPAPR machine and PowerNV machine, the interrupt presenters are
created by a machine handler at the core level and are reseted
independently. This is not consistent and it raises issues when it
comes to handle hot-plugged CPUs. In that case, the presenters are not
reseted. This is less of an issue in XICS, although a zero MFFR could
be a concern, but in XIVE, the OS CAM line is not set and this breaks
the presenting algorithm. The current code has workarounds which need
a global cleanup.
Extend the sPAPR IRQ backend and the PowerNV Chip class with a new
cpu_intc_reset() handler called by the CPU reset handler and remove
the XiveTCTX reset handler which is now redundant.
Set the OS CAM line when the interrupt presenter of the sPAPR core is
reseted. This will also cover the case of hot-plugged CPUs.
Thanks,
C.
Changes in v3:
- Introduced a DeviceClass::reset for the CPU (Greg)
- add support for PowerNV
Changes in v2:
- removed property
- simplified reset handlers
Cédric Le Goater (3):
spapr: move CPU reset after presenter creation
ppc: reset the interrupt presenter from the CPU reset handler
spapr/xive: Set the OS CAM line at reset
Greg Kurz (1):
spapr_cpu_core: Implement DeviceClass::reset
include/hw/ppc/pnv.h | 1 +
include/hw/ppc/spapr_irq.h | 2 ++
include/hw/ppc/spapr_xive.h | 1 -
include/hw/ppc/xics.h | 1 +
include/hw/ppc/xive.h | 1 +
hw/intc/spapr_xive.c | 53 +++++++++++++++++--------------------
hw/intc/xics.c | 8 ++----
hw/intc/xics_spapr.c | 7 +++++
hw/intc/xive.c | 12 +--------
hw/ppc/pnv.c | 18 +++++++++++++
hw/ppc/pnv_core.c | 8 ++++++
hw/ppc/spapr_cpu_core.c | 38 +++++++++++++++++++-------
hw/ppc/spapr_irq.c | 14 ++++++++++
13 files changed, 107 insertions(+), 57 deletions(-)
--
2.21.0
- [PATCH v3 0/4] ppc: reset the interrupt presenter from the CPU reset handler,
Cédric Le Goater <=