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Paul Mackerras 93b0f4dc29 KVM: PPC: Book3S HV: Implement timebase offset for guests 
This allows guests to have a different timebase origin from the host.
This is needed for migration, where a guest can migrate from one host
to another and the two hosts might have a different timebase origin.
However, the timebase seen by the guest must not go backwards, and
should go forwards only by a small amount corresponding to the time
taken for the migration.

Therefore this provides a new per-vcpu value accessed via the one_reg
interface using the new KVM_REG_PPC_TB_OFFSET identifier.  This value
defaults to 0 and is not modified by KVM.  On entering the guest, this
value is added onto the timebase, and on exiting the guest, it is
subtracted from the timebase.

This is only supported for recent POWER hardware which has the TBU40
(timebase upper 40 bits) register.  Writing to the TBU40 register only
alters the upper 40 bits of the timebase, leaving the lower 24 bits
unchanged.  This provides a way to modify the timebase for guest
migration without disturbing the synchronization of the timebase
registers across CPU cores.  The kernel rounds up the value given
to a multiple of 2^24.

Timebase values stored in KVM structures (struct kvm_vcpu, struct
kvmppc_vcore, etc.) are stored as host timebase values.  The timebase
values in the dispatch trace log need to be guest timebase values,
however, since that is read directly by the guest.  This moves the
setting of vcpu->arch.dec_expires on guest exit to a point after we
have restored the host timebase so that vcpu->arch.dec_expires is a
host timebase value.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-10-17 14:44:59 +02:00
..
vdso32 powerpc: Convert some mftb/mftbu into mfspr 2013-08-20 19:33:12 -05:00
vdso64 powerpc: Add VDSO version of time 2013-04-23 16:05:05 +10:00
.gitignore
align.c powerpc: Never handle VSX alignment exceptions from kernel 2013-08-27 14:44:26 +10:00
asm-offsets.c KVM: PPC: Book3S HV: Implement timebase offset for guests 2013-10-17 14:44:59 +02:00
audit.c
btext.c powerpc/btext: Fix CONFIG_PPC_EARLY_DEBUG_BOOTX on ppc32 2013-08-27 16:01:23 +10:00
cacheinfo.c powerpc: Make device tree accesses in cache info code endian safe 2013-08-14 15:33:27 +10:00
cacheinfo.h
clock.c
compat_audit.c
cpu_setup_6xx.S
cpu_setup_44x.S
cpu_setup_a2.S powerpc: Enforce usage of RA 0-R31 where possible 2012-07-10 19:18:35 +10:00
cpu_setup_fsl_booke.S powerpc/85xx: Add machine check handler to fix PCIe erratum on mpc85xx 2013-07-30 15:50:07 -05:00
cpu_setup_pa6t.S
cpu_setup_power.S powerpc: Fix TLB cleanup at boot on POWER8 2013-05-24 18:13:44 +10:00
cpu_setup_ppc970.S
cputable.c Merge remote-tracking branch 'scott/next' into next 2013-08-09 16:01:40 +10:00
crash.c
crash_dump.c powerpc: Remove savemaxmem parameter setup 2013-07-03 16:08:03 -07:00
dbell.c powerpc: Add accounting for Doorbell interrupts 2013-04-18 15:59:55 +10:00
dma-iommu.c powerpc/dma-iommu: Fix IOMMU window check 2012-08-24 20:26:07 +10:00
dma-swiotlb.c powerpc/swiotlb: Enable at early stage and disable if not necessary 2012-09-12 14:57:09 -05:00
dma.c powerpc/kernel: Remove uses of abs_to_virt() and virt_to_abs() 2012-09-05 15:19:30 +10:00
eeh.c powerpc/eeh: Add missing procfs entry for PowerNV 2013-08-09 18:06:47 +10:00
eeh_cache.c powerpc/eeh: Remove reference to PCI device 2013-07-24 14:18:46 +10:00
eeh_dev.c powerpc/eeh: Move common part to kernel directory 2013-06-20 17:05:35 +10:00
eeh_driver.c powerpc/eeh: Fix unbalanced enable for IRQ 2013-07-24 14:18:49 +10:00
eeh_event.c powerpc/eeh: Use interruptible sleep in keehd 2013-06-25 17:24:41 +10:00
eeh_pe.c powerpc/eeh: Don't use pci_dev during BAR restore 2013-07-24 14:18:49 +10:00
eeh_sysfs.c powerpc/eeh: Introdce flag to protect sysfs 2013-07-24 14:18:49 +10:00
entry_32.S powerpc/32bit:Store temporary result in r0 instead of r8 2013-06-01 08:29:27 +10:00
entry_64.S powerpc: Cleanup handling of the DSCR bit in the FSCR register 2013-08-27 15:05:22 +10:00
epapr_hcalls.S powerpc: Add paravirt idle loop for 64-bit Book-E 2013-03-13 14:19:36 -05:00
epapr_paravirt.c powerpc/85xx: Move ePAPR paravirt initialization earlier 2013-08-07 18:38:06 -05:00
exceptions-64e.S powerpc/ppc64: Rename SOFT_DISABLE_INTS with RECONCILE_IRQ_STATE 2013-08-14 14:57:47 +10:00
exceptions-64s.S Merge branch 'merge' into next 2013-08-27 15:03:30 +10:00
fadump.c mm/ppc: use common help functions to free reserved pages 2013-04-29 15:54:30 -07:00
firmware.c
fpu.S powerpc: Add FP/VSX and VMX register load functions for transactional memory 2013-02-15 16:58:52 +11:00
fsl_booke_entry_mapping.S
ftrace.c powerpc/ftrace: Trace function graph entry before updating index 2012-07-27 11:42:34 +10:00
head_8xx.S powerpc: Remove the empty giveup_fpu() function on 32bit kernel 2013-08-14 14:59:50 +10:00
head_32.S
head_40x.S powerpc: Remove the empty giveup_fpu() function on 32bit kernel 2013-08-14 14:59:50 +10:00
head_44x.S powerpc: Remove the empty giveup_fpu() function on 32bit kernel 2013-08-14 14:59:50 +10:00
head_64.S powerpc: Align p_toc 2013-08-14 11:50:19 +10:00
head_booke.h powerpc: Fix interrupt range check on debug exception 2013-05-02 10:31:01 +10:00
head_fsl_booke.S powerpc: Remove the empty giveup_fpu() function on 32bit kernel 2013-08-14 14:59:50 +10:00
hw_breakpoint.c powerpc/hw_brk: Fix off by one error when validating DAWR region end 2013-07-02 08:20:49 +10:00
ibmebus.c ibmebus: convert of_platform_driver to platform_driver 2013-06-12 12:37:26 +01:00
idle.c powerpc/idle: Convert use of typedef ctl_table to struct ctl_table 2013-07-01 11:10:35 +10:00
idle_6xx.S powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
idle_book3e.S powerpc: Add paravirt idle loop for 64-bit Book-E 2013-03-13 14:19:36 -05:00
idle_e500.S powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
idle_power4.S powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
idle_power7.S powerpc/powernv: Always go into nap mode when CPU is offline 2012-09-05 16:05:20 +10:00
io-workarounds.c powerpc: Better split CONFIG_PPC_INDIRECT_PIO and CONFIG_PPC_INDIRECT_MMIO 2013-08-14 14:57:50 +10:00
io.c powerpc/powernv: Add PIO accessors for Power8 LPC bus 2013-08-14 14:58:08 +10:00
iomap.c
iommu.c PTR_RET is now PTR_ERR_OR_ZERO(): Replace most. 2013-07-15 11:25:01 +09:30
irq.c powerpc: Rename PMU interrupts from CNT to PMI 2013-08-01 13:11:46 +10:00
isa-bridge.c POWERPC: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
jump_label.c
kgdb.c powerpc/kgdb: Removed kmalloc returned value cast 2013-04-18 13:03:56 +10:00
kprobes.c powerpc: Move the single step enable code to a generic path 2013-06-20 16:55:09 +10:00
kvm.c mm: enhance free_reserved_area() to support poisoning memory with zero 2013-07-03 16:07:32 -07:00
kvm_emul.S KVM: PPC: Not optimizing MSR_CE and MSR_ME with paravirt. 2012-05-30 11:43:11 +02:00
l2cr_6xx.S
legacy_serial.c powerpc: Little endian fixes for legacy_serial.c 2013-08-14 15:33:32 +10:00
machine_kexec.c powerpc+of: Rename the drivers/of prom_* functions to of_* 2012-11-15 12:56:52 +11:00
machine_kexec_32.c
machine_kexec_64.c powerpc/kexec: Fix kexec when using VMX optimised memcpy 2013-05-14 14:36:23 +10:00
Makefile powerpc/pseries: Move lparcfg.c to platforms/pseries 2013-08-28 11:20:54 +10:00
misc.S powerpc: switch to generic sys_execve()/kernel_execve() 2012-09-30 23:35:51 -04:00
misc_32.S powerpc: Remove the symbol __flush_icache_range 2013-08-14 14:56:44 +10:00
misc_64.S powerpc: remove the unused function disable_kernel_fp() 2013-08-14 14:59:25 +10:00
module.c
module_32.c powerpc: Fix kernel panic during kernel module load 2012-06-08 19:59:08 +10:00
module_64.c powerpc: Build kernel with -mcmodel=medium 2013-01-10 17:00:31 +11:00
msi.c
nvram_64.c powerpc/nvram64: Need return the related error code on failure occurs 2013-07-01 11:46:56 +10:00
of_platform.c powerpc/eeh: Fix crash when adding a device in a slot with DDW 2013-01-10 17:01:58 +11:00
paca.c powerpc: Fix little endian lppaca, slb_shadow and dtl_entry 2013-08-14 15:33:35 +10:00
pci-common.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-09-06 10:49:42 -07:00
pci-hotplug.c powerpc/pci: Partial tree hotplug support 2013-07-24 14:18:48 +10:00
pci_32.c powerpc/pci: Support per-aperture memory offset 2013-05-06 13:40:40 +10:00
pci_64.c powerpc/pci: Don't use bitfield for force_32bit_msi 2013-08-14 11:50:25 +10:00
pci_dn.c powerpc: Make PCI device node device tree accesses endian safe 2013-08-14 15:33:31 +10:00
pci_of_scan.c powerpc: Make OF PCI device tree accesses endian safe 2013-08-14 15:33:30 +10:00
pmc.c
ppc32.h powerpc: switch to generic old sigaction() 2013-02-03 18:16:10 -05:00
ppc_ksyms.c powerpc: Remove the empty giveup_fpu() function on 32bit kernel 2013-08-14 14:59:50 +10:00
ppc_save_regs.S
proc_powerpc.c proc_powerpc: switch to fixed_size_llseek() 2013-06-29 12:57:50 +04:00
process.c Merge branch 'merge' into next 2013-08-27 15:03:30 +10:00
prom.c Device tree core updates for v3.12 2013-09-10 13:53:52 -07:00
prom_init.c powerpc: Fix section mismatch warning for prom_rtas_call 2013-09-11 11:39:38 +10:00
prom_init_check.sh powerpc/pmac: Early debug output on screen on 64-bit macs 2013-08-14 14:57:40 +10:00
prom_parse.c powerpc: of_parse_dma_window should take a __be32 *dma_window 2013-08-14 15:33:26 +10:00
ptrace.c ptrace/powerpc: revert "hw_breakpoints: Fix racy access to ptrace breakpoints" 2013-07-09 10:33:25 -07:00
ptrace32.c powerpc: fixing ptrace_get_reg to return an error 2013-04-18 13:03:57 +10:00
reloc_32.S powerpc: Don't flush/invalidate the d/icache for an unknown relocation type 2013-07-01 11:10:34 +10:00
reloc_64.S
rtas-proc.c
rtas-rtc.c
rtas.c powerpc: Make RTAS calls endian safe 2013-08-14 15:33:22 +10:00
rtas_flash.c powerpc/rtas_flash: Fix validate_flash buffer overflow issue 2013-05-14 14:36:26 +10:00
rtas_pci.c powerpc/kernel: Cleanup on rtas_pci.c 2013-04-18 13:03:48 +10:00
rtasd.c powerpc/pseries: Add /proc interface to control topology updates 2013-04-26 16:08:26 +10:00
setup-common.c powerpc: More little endian fixes for setup-common.c 2013-08-14 15:33:24 +10:00
setup.h
setup_32.c powerpc/85xx: Move ePAPR paravirt initialization earlier 2013-08-07 18:38:06 -05:00
setup_64.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-09-06 10:49:42 -07:00
signal.c powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions 2013-06-01 08:29:23 +10:00
signal.h powerpc/tm: Fix userspace stack corruption on signal delivery for active transactions 2013-06-01 08:29:23 +10:00
signal_32.c powerpc: Fix VRSAVE handling 2013-08-14 14:57:18 +10:00
signal_64.c powerpc: Remove the redundant flush_fp_to_thread() in setup_sigcontext() 2013-08-14 14:59:38 +10:00
smp-tbsync.c POWERPC: drivers: remove __dev* attributes. 2013-01-03 15:57:04 -08:00
smp.c powerpc: Export cpu_to_chip_id() to fix build error 2013-09-11 11:39:37 +10:00
stacktrace.c
suspend.c
swsusp.c
swsusp_32.S
swsusp_64.c
swsusp_asm64.S powerpc: add Book E support to 64-bit hibernation 2013-08-23 19:39:26 -05:00
swsusp_booke.S powerpc/mpc85xx: invalidate TLB after hibernation resume 2013-07-30 15:50:08 -05:00
sys_ppc32.c unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE 2013-05-09 13:46:38 -04:00
syscalls.c powerpc: Fix personality handling in ppc64_personality() 2012-08-24 20:26:07 +10:00
sysfs.c powerpc: Delete __cpuinit usage from all users 2013-07-01 11:10:36 +10:00
systbl.S
systbl_chk.c
systbl_chk.sh
tau_6xx.c
time.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2013-09-06 10:49:42 -07:00
tm.S Merge branch 'merge' into next 2013-08-27 15:03:30 +10:00
traps.c powerpc: Cleanup handling of the DSCR bit in the FSCR register 2013-08-27 15:05:22 +10:00
udbg.c powerpc: Add a configuration option for early BootX/OpenFirmware debug 2013-06-20 16:55:12 +10:00
udbg_16550.c powerpc/wsp: Fix early debug build 2013-08-16 10:59:27 +10:00
uprobes.c uretprobes/powerpc: Hijack return address 2013-04-13 15:31:56 +02:00
vdso.c powerpc: Delete __cpuinit usage from all users 2013-07-01 11:10:36 +10:00
vecemu.c
vector.S powerpc: Add FP/VSX and VMX register load functions for transactional memory 2013-02-15 16:58:52 +11:00
vio.c powerpc: Make device tree accesses in VIO subsystem endian safe 2013-08-14 15:33:29 +10:00
vmlinux.lds.S powerpc/modules: Module CRC relocation fix causes perf issues 2013-07-24 14:18:43 +10:00