Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.6-20160405' into staging

ppc patch queue for 2016-03-24

Three bugfixes for target-ppc, pseries machine type and related devices.

1. Fix

Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.6-20160405' into staging

ppc patch queue for 2016-03-24

Three bugfixes for target-ppc, pseries machine type and related devices.

1. Fix a bug in the core code where kvm_vcpu_dirty would not be set
before the very first system reset. This meant that if things in
the reset path did their own cpu_synchronize_state() it would pull
stale data out of KVM.

On ppc this, in combination with a previous cleanup meant that the
MSR would be zeroed before entry, instead of correctly having the
SF (64-bit mode) bit set.

2. Allow immediate detach of hot-added PCI devices which haven't yet
been announced to the guest.

This fixes a regression: because of a case where we now defer
announcement of non-zero functions to the guest, an incorrect
hot-add of such a device can't be backed out until the add is
completed, which is counter-intuitive to say the least.

3. Fix migration of alternate interrupt locations. The location of
interrupt vectors can be affected by the LPCR, and we weren't
correctly recalculating this after migration of a non-standard LPCR
value.

# gpg: Signature made Tue 05 Apr 2016 03:13:41 BST using RSA key ID 20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg: aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg: aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E 87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.6-20160405:
vl: Move cpu_synchronize_all_states() into qemu_system_reset()
spapr_drc: enable immediate detach for unsignalled devices
ppc: Rework POWER7 & POWER8 exception model

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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spapr_drc: enable immediate detach for unsignalled devices

Currently spapr doesn't support "aborting" hotplug of PCI
devices by allowing device_del to immediately remove the
device if we haven't sig

spapr_drc: enable immediate detach for unsignalled devices

Currently spapr doesn't support "aborting" hotplug of PCI
devices by allowing device_del to immediately remove the
device if we haven't signalled the presence of the device
to the guest.

In the past this wasn't an issue, since we always immediately
signalled device attach and simply relied on full guest-aware
add->remove path for device removal. However, as of 788d259,
we now defer signalling for PCI functions until function 0
is attached, so now we need to deal with these "abort" operations
for cases where a user hotplugs a non-0 function, then opts to
remove it prior hotplugging function 0. Currently they'd have to
reboot before the unplug completed. PCIe multifunction hotplug
does not have this requirement however, so from a management
implementation perspective it would be good to address this within
the same release as 788d259.

We accomplish this by simply adding a 'signalled' flag to track
whether a device hotplug event has been sent to the guest. If it
hasn't, we allow immediate removal under the assumption that the
guest will not be using the device. Devices present at boot/reset
time are also assumed to be 'signalled'.

For CPU/memory/etc, signalling will still happen immediately
as part of device_add, so only PCI functions should be affected.

Cc: bharata@linux.vnet.ibm.com
Cc: david@gibson.dropbear.id.au
Cc: sbhat@linux.vnet.ibm.com
Cc: qemu-ppc@nongnu.org
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
[dwg: This fixes a regression where an incorrect hot-add of a non-zero
function can no longer be backed out until function 0 is added]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

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Merge remote-tracking branch 'remotes/dgibson/tags/spapr-next-20150923' into staging

sPAPR Patch Queue: 2015-09-23

Highlights:
* pseries-2.5 machine type
* Memory hotplug for "pseries" gues

Merge remote-tracking branch 'remotes/dgibson/tags/spapr-next-20150923' into staging

sPAPR Patch Queue: 2015-09-23

Highlights:
* pseries-2.5 machine type
* Memory hotplug for "pseries" guests
* Fixes to the PAPR Dynamic Reconfiguration hotplug code
* Several PAPR compliance fixes
* New SLOF with:
* GPT support
* Much faster VGA handling

# gpg: Signature made Wed 23 Sep 2015 02:50:10 BST using DSA key ID FDDA6FC6
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: F730 2185 38B4 D13E FD80 34F2 6882 CAC6 FDDA 6FC6

* remotes/dgibson/tags/spapr-next-20150923: (36 commits)
sPAPR: Enable EEH on VFIO PCI device only
sPAPR: Revert don't enable EEH on emulated PCI devices
ppc/spapr: Implement H_RANDOM hypercall in QEMU
ppc/spapr: Fix buffer overflow in spapr_populate_drconf_memory()
spapr: Fix default NUMA node allocation for threads
spapr: Move memory hotplug to RTAS_LOG_V6_HP_ID_DRC_COUNT type
spapr: Support hotplug by specifying DRC count
spapr: Revert to memory@XXXX representation for non-hotplugged memory
spapr: Populate ibm,associativity-lookup-arrays correctly for non-NUMA
spapr: Provide better error message when slots exceed max allowed
spapr: Don't allow memory hotplug to memory less nodes
spapr: Memory hotplug support
spapr: Make hash table size a factor of maxram_size
spapr: Support ibm,dynamic-reconfiguration-memory
spapr: Add LMB DR connectors
spapr: Use QEMU limit for maximum CPUs number
spapr: Don't use QOM [*] syntax for DR connectors.
spapr_drc: use RTAS return codes for methods called by RTAS
spapr: Initialize hotplug memory address space
spapr_drc: don't allow 'empty' DRCs to be unisolated or allocated
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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spapr_drc: use RTAS return codes for methods called by RTAS

Certain methods in sPAPRDRConnector objects are only ever called by
RTAS and in many cases are responsible for the logic that determines
t

spapr_drc: use RTAS return codes for methods called by RTAS

Certain methods in sPAPRDRConnector objects are only ever called by
RTAS and in many cases are responsible for the logic that determines
the RTAS return codes.

Rather than having a level of indirection requiring RTAS code to
re-interpret return values from such methods to determine the
appropriate return code, just pass them through directly.

This requires changing method return types to uint32_t to match the
type of values currently passed to RTAS helpers.

In the case of read accesses like drc->entity_sense() where we weren't
previously reporting any errors, just the read value, we modify the
function to return RTAS return code, and pass the read value back via
reference.

Suggested-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Cc: Bharata B Rao <bharata@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

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spapr_rtas: Prevent QEMU crash during hotplug without a prior device_add

If drmgr is used in the guest to hotplug a device before a device_add
has been issued via the QEMU monitor, QEMU segfaults in

spapr_rtas: Prevent QEMU crash during hotplug without a prior device_add

If drmgr is used in the guest to hotplug a device before a device_add
has been issued via the QEMU monitor, QEMU segfaults in configure_connector
call. This occurs due to accessing of NULL FDT which otherwise would have
been created and associated with the DRC during device_add command.

Check for NULL FDT and return failure from configure_connector call.
As per PAPR+, an error value of -9003 seems appropriate for this failure.

Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
Cc: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

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Merge remote-tracking branch 'remotes/agraf/tags/signed-ppc-for-upstream' into staging

Patch queue for ppc - 2015-06-03

Highlights this time around:

- sPAPR: endian fixes, speedups, bug fixes, h

Merge remote-tracking branch 'remotes/agraf/tags/signed-ppc-for-upstream' into staging

Patch queue for ppc - 2015-06-03

Highlights this time around:

- sPAPR: endian fixes, speedups, bug fixes, hotplug basics
- add default ram size capability for machines (sPAPR defaults to 512MB now)

# gpg: Signature made Wed Jun 3 22:59:09 2015 BST using RSA key ID 03FEDC60
# gpg: Good signature from "Alexander Graf <agraf@suse.de>"
# gpg: aka "Alexander Graf <alex@csgraf.de>"

* remotes/agraf/tags/signed-ppc-for-upstream: (40 commits)
softmmu: support up to 12 MMU modes
tcg: add TCG_TARGET_TLB_DISPLACEMENT_BITS
tci: do not use CPUArchState in tcg-target.h
Add David Gibson for sPAPR in MAINTAINERS file
pseries: Enable in-kernel H_LOGICAL_CI_{LOAD, STORE} implementations
spapr: override default ram size to 512MB
machine: add default_ram_size to machine class
spapr_pci: emit hotplug add/remove events during hotplug
spapr_pci: enable basic hotplug operations
pci: make pci_bar useable outside pci.c
spapr_pci: create DRConnectors for each PCI slot during PHB realize
spapr_pci: add dynamic-reconfiguration option for spapr-pci-host-bridge
spapr_drc: add spapr_drc_populate_dt()
spapr_events: event-scan RTAS interface
spapr_events: re-use EPOW event infrastructure for hotplug events
spapr_rtas: add ibm, configure-connector RTAS interface
spapr: add rtas_st_buffer_direct() helper
spapr_rtas: add get-sensor-state RTAS interface
spapr_rtas: add set-indicator RTAS interface
spapr_rtas: add get/set-power-level RTAS interfaces
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

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spapr_drc: add spapr_drc_populate_dt()

This function handles generation of ibm,drc-* array device tree
properties to describe DRC topology to guests. This will by used
by the guest to direct RTAS ca

spapr_drc: add spapr_drc_populate_dt()

This function handles generation of ibm,drc-* array device tree
properties to describe DRC topology to guests. This will by used
by the guest to direct RTAS calls to manage any dynamic resources
we associate with a particular DR Connector as part of
hotplug/unplug.

Since general management of boot-time device trees are handled
outside of sPAPRDRConnector, we insert these values blindly given
an FDT and offset. A mask of sPAPRDRConnector types is given to
instruct us on what types of connectors entries should be generated
for, since descriptions for different connectors may live in
different parts of the device tree.

Based on code originally written by Nathan Fontenot.

Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>

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spapr_drc: initial implementation of sPAPRDRConnector device

This device emulates a firmware abstraction used by pSeries guests to
manage hotplug/dynamic-reconfiguration of host-bridges, PCI devices

spapr_drc: initial implementation of sPAPRDRConnector device

This device emulates a firmware abstraction used by pSeries guests to
manage hotplug/dynamic-reconfiguration of host-bridges, PCI devices,
memory, and CPUs. It is conceptually similar to an SHPC device,
complete with LED indicators to identify individual slots to physical
physical users and indicate when it is safe to remove a device. In
some cases it is also used to manage virtualized resources, such a
memory, CPUs, and physical-host bridges, which in the case of pSeries
guests are virtualized resources where the physical components are
managed by the host.

Guests communicate with these DR Connectors using RTAS calls,
generally by addressing the unique DRC index associated with a
particular connector for a particular resource. For introspection
purposes we expose this state initially as QOM properties, and
in subsequent patches will introduce the RTAS calls that make use of
it. This constitutes to the 'guest' interface.

On the QEMU side we provide an attach/detach interface to associate
or cleanup a DeviceState with a particular sPAPRDRConnector in
response to hotplug/unplug, respectively. This constitutes the
'physical' interface to the DR Connector.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>

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