qemu/docs/specs
Greg Kurz c55bcb1f47 spapr: Clarify error and documentation for broken KVM XICS
When starting an L2 KVM guest with `ic-mode=dual,kernel-irqchip=on`,
QEMU fails with:

KVM is too old to support ic-mode=dual,kernel-irqchip=on

This error message was introduced to detect older KVM versions that
didn't allow destruction and re-creation of the XICS KVM device that
we do at reboot. But it is actually the same issue that we get with
nested guests : when running under pseries, KVM currently provides
a genuine XICS device (not the XICS-on-XIVE device that we get
under powernv) which doesn't support destruction/re-creation.

This will eventually be fixed in KVM but in the meantime, update
the error message and documentation to mention the nested case.
While here, mention that in "No XIVE support in KVM" section that
this can also happen with "guest OSes supporting XIVE" since
we check this at init time before starting the guest.

Reported-by: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Buglink: https://bugs.launchpad.net/qemu/+bug/1890290
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <159664243614.622889.18307368735989783528.stgit@bahia.lan>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2020-08-12 13:16:27 +10:00
..
acpi_cpu_hotplug.txt acpi: cpuhp: document CPHP_GET_CPU_ID_CMD command 2020-02-27 03:46:10 -05:00
acpi_hest_ghes.rst docs: APEI GHES generation and CPER record description 2020-05-14 15:03:09 +01:00
acpi_hw_reduced_hotplug.rst hw/arm/virt: Add nvdimm hotplug support 2020-05-04 10:25:02 -04:00
acpi_mem_hotplug.txt pc: memhp: move nvdimm hotplug out of memory hotplug 2016-11-15 17:20:37 +02:00
acpi_nvdimm.txt docs: Grammar and spelling fixes 2018-07-13 10:16:04 +01:00
acpi_pci_hotplug.txt acpi_piix4: Re-define PCI hotplug eject register read 2012-04-15 12:17:23 +03:00
conf.py docs: Build and install specs manual 2019-06-17 15:35:31 +01:00
edu.txt hw/misc/edu: support MSI interrupt 2016-10-04 10:00:25 +02:00
fw_cfg.txt softmmu/vl: Allow -fw_cfg 'gen_id' option to use the 'etc/' namespace 2020-07-03 18:16:01 +02:00
index.rst docs: adding NUMA documentation for pseries 2020-08-12 13:16:27 +10:00
ivshmem-spec.txt docs: Stop building qemu-doc 2020-03-06 11:06:55 +00:00
pci-ids.txt allocate pci id for mdpy 2018-05-23 03:14:40 +03:00
pci-serial.txt serial: add pci-serial documentation 2012-10-22 13:26:42 -05:00
pci-testdev.txt pci-testdev: add optional memory bar 2018-11-05 13:24:02 -05:00
ppc-spapr-hcalls.txt docs: Grammar and spelling fixes 2018-07-13 10:16:04 +01:00
ppc-spapr-hotplug.txt global: Squash 'the the' 2019-11-06 17:19:40 +01:00
ppc-spapr-numa.rst docs: adding NUMA documentation for pseries 2020-08-12 13:16:27 +10:00
ppc-spapr-uv-hcalls.txt docs/specs: initial spec summary for Ultravisor-related hcalls 2019-08-21 17:17:12 +10:00
ppc-spapr-xive.rst spapr: Clarify error and documentation for broken KVM XICS 2020-08-12 13:16:27 +10:00
ppc-xive.rst global: Squash 'the the' 2019-11-06 17:19:40 +01:00
pvpanic.txt pvpanic: implement crashloaded event handling 2020-01-24 20:59:07 +01:00
rocker.txt Fix some typos found by codespell 2016-05-18 15:04:27 +03:00
standard-vga.txt display/stdvga: add edid support. 2018-09-27 08:07:51 +02:00
tpm.rst virtio,acpi,pci: fixes, cleanups. 2020-06-25 16:52:42 +01:00
vmcoreinfo.txt docs/vmcoreinfo: detail unsupported host format behaviour 2018-03-01 18:17:47 +02:00
vmgenid.txt docs: VM Generation ID device description 2017-03-02 07:14:26 +02:00
vmw_pvscsi-spec.txt scsi: VMWare PVSCSI paravirtual device implementation 2013-04-19 10:44:17 +02:00