qemu/hw/ppc
Alexey Kardashevskiy 2a6593cb6a spapr: Add ibm, client-architecture-support call
The PAPR+ specification defines a ibm,client-architecture-support (CAS)
RTAS call which purpose is to provide a negotiation mechanism for
the guest and the hypervisor to work out the best compatibility parameters.
During the negotiation process, the guest provides an array of various
options and capabilities which it supports, the hypervisor adjusts
the device tree and (optionally) reboots the guest.

At the moment the Linux guest calls CAS method at early boot so SLOF
gets called. SLOF allocates a memory buffer for the device tree changes
and calls a custom KVMPPC_H_CAS hypercall. QEMU parses the options,
composes a diff for the device tree, copies it to the buffer provided
by SLOF and returns to SLOF. SLOF updates the device tree and returns
control to the guest kernel. Only then the Linux guest parses the device
tree so it is possible to avoid unnecessary reboot in most cases.

The device tree diff is a header with an update format version
(defined as 1 in this patch) followed by a device tree with the properties
which require update.

If QEMU detects that it has to reboot the guest, it silently does so
as the guest expects reboot to happen because this is usual pHyp firmware
behavior.

This defines custom KVMPPC_H_CAS hypercall. The current SLOF already
has support for it.

This implements stub which returns very basic tree (root node,
no properties) to the guest.

As the return buffer does not contain any change, no change in behavior is
expected.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alexander Graf <agraf@suse.de>
2014-06-16 13:24:37 +02:00
..
e500-ccsr.h ppc: do not use ../ in include files 2013-03-01 13:57:33 +01:00
e500.c PPC: e500: Move to u-boot as firmware 2014-06-16 13:24:35 +02:00
e500.h machine: Conversion of QEMUMachineInitArgs to MachineState 2014-05-28 17:35:01 +02:00
e500plat.c machine: Conversion of QEMUMachineInitArgs to MachineState 2014-05-28 17:35:01 +02:00
mac_newworld.c mac99: Added FW_CFG_PPC_BUSFREQ to match CLOCKFREQ and TBFREQ already there 2014-06-16 13:24:28 +02:00
mac_oldworld.c mac99: Added FW_CFG_PPC_BUSFREQ to match CLOCKFREQ and TBFREQ already there 2014-06-16 13:24:28 +02:00
mac.h hw/ppc/mac.h: remove unused BIOS_FILENAME definition 2013-12-02 21:18:18 +04:00
Makefile.objs ppcemb-softmmu: Drop Mac and e500 emulation 2014-02-13 17:47:43 +01:00
mpc8544_guts.c cpu: Replace cpu_single_env with CPUState current_cpu 2013-07-09 21:20:28 +02:00
mpc8544ds.c machine: Conversion of QEMUMachineInitArgs to MachineState 2014-05-28 17:35:01 +02:00
ppc4xx_devs.c hw/ppc: Avoid shifting left into sign bit 2014-03-27 19:22:49 +04:00
ppc4xx_pci.c savevm: Remove all the unneeded version_minimum_id_old (ppc) 2014-06-16 04:55:26 +02:00
ppc405_boards.c machine: Conversion of QEMUMachineInitArgs to MachineState 2014-05-28 17:35:01 +02:00
ppc405_uc.c target-ppc: Clean up ENV_GET_CPU() usage 2014-03-13 19:01:48 +01:00
ppc405.h hw: move private headers to hw/ subdirectories. 2013-04-08 18:13:16 +02:00
ppc440_bamboo.c machine: Conversion of QEMUMachineInitArgs to MachineState 2014-05-28 17:35:01 +02:00
ppc_booke.c hw/ppc: Avoid shifting left into sign bit 2014-03-27 19:22:49 +04:00
ppc.c spapr: Add support for time base offset migration 2014-06-16 13:24:35 +02:00
ppce500_spin.c ppce500_spin: Initialize struct properly 2014-04-08 11:20:05 +02:00
prep.c machine: Conversion of QEMUMachineInitArgs to MachineState 2014-05-28 17:35:01 +02:00
spapr_events.c spapr-rtas: replace return code constants with macros 2013-12-20 01:57:59 +01:00
spapr_hcall.c spapr: Add ibm, client-architecture-support call 2014-06-16 13:24:37 +02:00
spapr_iommu.c savevm: Remove all the unneeded version_minimum_id_old (ppc) 2014-06-16 04:55:26 +02:00
spapr_pci.c spapr_pci: fix MSI limit 2014-06-16 13:24:32 +02:00
spapr_rtas.c hw: Add missing 'static' attributes 2014-05-07 21:00:43 +04:00
spapr_vio.c savevm: Remove all the unneeded version_minimum_id_old (ppc) 2014-06-16 04:55:26 +02:00
spapr.c spapr: Add ibm, client-architecture-support call 2014-06-16 13:24:37 +02:00
virtex_ml507.c machine: Conversion of QEMUMachineInitArgs to MachineState 2014-05-28 17:35:01 +02:00