qemu/hw/ppc
David Gibson 2772cf6be9 pseries: Use smaller default hash page tables when guest can resize
We've now implemented a PAPR extension allowing PAPR guest to resize
their hash page table (HPT) during runtime.

This patch makes use of that facility to allocate smaller HPTs by default.
Specifically when a guest is aware of the HPT resize facility, qemu sizes
the HPT to the initial memory size, rather than the maximum memory size on
the assumption that the guest will resize its HPT if necessary for hot
plugged memory.

When the initial memory size is much smaller than the maximum memory size
(a common configuration with e.g. oVirt / RHEV) then this can save
significant memory on the HPT.

If the guest does *not* advertise HPT resize awareness when it makes the
ibm,client-architecture-support call, qemu resizes the HPT for maxmimum
memory size (unless it's been configured not to allow such guests at all).

For now we make that reallocation assuming the guest has not yet used the
HPT at all.  That's true in practice, but not, strictly, an architectural
or PAPR requirement.  If we need to in future we can fix this by having
the client-architecture-support call reboot the guest with the revised
HPT size (the client-architecture-support call is explicitly permitted to
trigger a reboot in this way).

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
2017-07-17 15:07:05 +10:00
..
e500-ccsr.h
e500.c shutdown: Add source information to SHUTDOWN and RESET 2017-05-23 13:28:17 +02:00
e500.h target-ppc: Eliminate redundant and incorrect function booke206_page_size_to_tlb 2016-07-01 09:57:01 +10:00
e500plat.c dma: do not depend on kvm_enabled() 2016-05-19 16:42:28 +02:00
fdt.c Move target-* CPU file into a target/ folder 2016-12-20 21:52:12 +01:00
mac_newworld.c ppc: add qemu_vga.ndrv ROM to fw_cfg interface for NewWorld Macs 2017-05-11 09:45:15 +10:00
mac_oldworld.c ppc: add qemu_vga.ndrv ROM to fw_cfg interface for OldWorld Macs 2017-05-11 09:45:15 +10:00
mac.h Clean up ill-advised or unusual header guards 2016-07-12 16:20:46 +02:00
Makefile.objs ppc/pnv: add initial IPMI sensors for the BMC simulator 2017-04-26 12:41:56 +10:00
mpc8544_guts.c shutdown: Add source information to SHUTDOWN and RESET 2017-05-23 13:28:17 +02:00
mpc8544ds.c ppc: Clean up includes 2016-01-29 15:07:22 +00:00
pnv_bmc.c ppc/pnv: generate an OEM SEL event on shutdown 2017-04-26 12:41:56 +10:00
pnv_core.c pnv-core: use get_uint() for "core-pir" property 2017-06-20 14:31:33 +02:00
pnv_lpc.c ppc/pnv: enable only one LPC bus 2017-04-26 12:41:55 +10:00
pnv_occ.c ppc/pnv: Add OCC model stub with interrupt support 2017-04-26 12:00:42 +10:00
pnv_psi.c xics: introduce macros for ICP/ICS link properties 2017-06-09 12:12:34 +10:00
pnv_xscom.c kvm: move cpu synchronization code 2017-01-19 22:07:46 +01:00
pnv.c Convert error_report() to warn_report() 2017-07-13 13:49:58 +02:00
ppc4xx_devs.c qemu-common: push cpu.h inclusion out of qemu-common.h 2016-05-19 16:42:29 +02:00
ppc4xx_pci.c qdev: Replace cannot_instantiate_with_device_add_yet with !user_creatable 2017-05-17 10:37:00 -03:00
ppc405_boards.c clean-up: removed duplicate #includes 2016-10-28 18:17:24 +03:00
ppc405_uc.c shutdown: Add source information to SHUTDOWN and RESET 2017-05-23 13:28:17 +02:00
ppc405.h Remove unused function declarations 2016-09-15 15:32:22 +03:00
ppc440_bamboo.c target-ppc: Add MMU model check for booke machines 2017-02-02 09:30:06 +11:00
ppc_booke.c ppc_booke: drop useless assignment 2017-05-07 09:57:51 +03:00
ppc.c shutdown: Add source information to SHUTDOWN and RESET 2017-05-23 13:28:17 +02:00
ppce500_spin.c hw/ppc: QOM'ify ppce500_spin.c 2017-01-31 10:10:13 +11:00
prep_systemio.c prep: add PReP System I/O 2017-01-31 10:10:13 +11:00
prep.c hw/ppc/prep: Remove superfluous call to soundhw_init() 2017-06-30 14:03:31 +10:00
rs6000_mc.c prep: add IBM RS/6000 7020 (40p) memory controller 2017-01-31 10:10:13 +11:00
spapr_cpu_core.c spapr: prevent QEMU crash when CPU realization fails 2017-06-30 14:03:31 +10:00
spapr_drc.c spapr: Implement DR-indicator for physical DRCs only 2017-07-17 15:07:05 +10:00
spapr_events.c spapr: Minor cleanups to events handling 2017-07-17 15:07:05 +10:00
spapr_hcall.c pseries: Use smaller default hash page tables when guest can resize 2017-07-17 15:07:05 +10:00
spapr_iommu.c * gdbstub fixes (Alex) 2017-07-14 12:16:09 +01:00
spapr_ovec.c spapr: replace debug printf with trace points 2017-02-22 11:28:28 +11:00
spapr_pci_vfio.c Use #include "..." for our own headers, <...> for others 2016-07-12 16:19:16 +02:00
spapr_pci.c spapr: Cleanups relating to DRC awaiting_release field 2017-07-17 15:07:05 +10:00
spapr_rng.c spapr_rng: Convert to DEFINE_PROP_LINK 2017-07-14 12:04:43 +02:00
spapr_rtas_ddw.c spapr_pci/spapr_pci_vfio: Support Dynamic DMA Windows (DDW) 2016-07-05 14:31:08 +10:00
spapr_rtas.c pseries: Correct panic behaviour for pseries machine type 2017-06-08 14:38:18 +10:00
spapr_rtc.c ppc/spapr: QOM'ify sPAPRRTCState 2017-04-26 12:00:41 +10:00
spapr_vio.c vmstate: error hint for failed equal checks 2017-06-28 11:18:44 +02:00
spapr.c pseries: Use smaller default hash page tables when guest can resize 2017-07-17 15:07:05 +10:00
trace-events pseries: Stubs for HPT resizing 2017-07-17 15:07:05 +10:00
virtex_ml507.c target-ppc: Add MMU model check for booke machines 2017-02-02 09:30:06 +11:00