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linux_dsm_epyc7002/arch/powerpc/kernel
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Paul Mackerras 512691d490 KVM: PPC: Book3S HV: Allow KVM guests to stop secondary threads coming online 
When a Book3S HV KVM guest is running, we need the host to be in
single-thread mode, that is, all of the cores (or at least all of
the cores where the KVM guest could run) to be running only one
active hardware thread.  This is because of the hardware restriction
in POWER processors that all of the hardware threads in the core
must be in the same logical partition.  Complying with this restriction
is much easier if, from the host kernel's point of view, only one
hardware thread is active.

This adds two hooks in the SMP hotplug code to allow the KVM code to
make sure that secondary threads (i.e. hardware threads other than
thread 0) cannot come online while any KVM guest exists.  The KVM
code still has to check that any core where it runs a guest has the
secondary threads offline, but having done that check it can now be
sure that they will not come online while the guest is running.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
2012-10-30 10:54:53 +01:00
..
vdso32 powerpc: Add VDSO version of getcpu 2012-07-11 14:18:40 +10:00
vdso64 powerpc: Add VDSO version of getcpu 2012-07-11 14:18:40 +10:00
.gitignore
align.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
asm-offsets.c powerpc: Restore correct DSCR in context switch 2012-09-05 16:05:22 +10:00
audit.c
btext.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
cacheinfo.c cpu: convert 'cpu' and 'machinecheck' sysdev_class to a regular subsystem 2011-12-21 14:29:42 -08:00
cacheinfo.h
clock.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
compat_audit.c
cpu_setup_6xx.S powerpc: Fix some 6xx/7xxx CPU setup functions 2011-02-07 12:57:11 +11:00
cpu_setup_44x.S powerpc/44x: Add support for the AMCC APM821xx SoC 2010-10-13 08:47:09 -04:00
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 KVM: PPC: e500mc support 2012-04-08 12:54:33 +03:00
cpu_setup_pa6t.S
cpu_setup_power7.S powerpc, KVM: Split HVMODE_206 cpu feature bit into separate HV and architecture bits 2011-07-12 13:16:58 +03:00
cpu_setup_ppc970.S powerpc, KVM: Split HVMODE_206 cpu feature bit into separate HV and architecture bits 2011-07-12 13:16:58 +03:00
cputable.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
crash_dump.c powerpc: Rename mapping based RELOCATABLE to DYNAMIC_MEMSTART for BookE 2011-12-20 10:20:19 -05:00
crash.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
dbell.c powerpc: Make sure IPI handlers see data written by IPI senders 2012-09-05 16:05:22 +10:00
dma-iommu.c powerpc/dma-iommu: Fix IOMMU window check 2012-08-24 20:26:07 +10:00
dma-swiotlb.c common: dma-mapping: add support for generic dma_mmap_* calls 2012-07-30 12:25:46 +02:00
dma.c Merge branch 'for-linus-for-3.6-rc1' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 2012-07-30 10:11:31 -07:00
entry_32.S powerpc: Set stack limit properly in crit_transfer_to_handler 2012-07-27 11:42:31 +10:00
entry_64.S powerpc: Restore correct DSCR in context switch 2012-09-05 16:05:22 +10:00
epapr_hcalls.S KVM: PPC: ev_idle hcall support for e500 guests 2012-10-05 23:38:37 +02:00
epapr_paravirt.c KVM: PPC: ev_idle hcall support for e500 guests 2012-10-05 23:38:37 +02:00
exceptions-64e.S powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
exceptions-64s.S powerpc: Give hypervisor decrementer interrupts their own handler 2012-09-05 16:05:19 +10:00
fadump.c powerpc: Fix fallout from system.h split up 2012-04-02 14:00:03 +10:00
firmware.c powerpc: fix implicit use of cache.h in kernel/firmware.c 2011-10-31 19:30:41 -04:00
fpu.S powerpc: Enforce usage of R0-R31 where possible 2012-07-10 19:18:30 +10:00
fsl_booke_entry_mapping.S powerpc/fsl-booke: Fix address issue when using relocatable kernels 2010-07-11 11:04:08 -05:00
ftrace.c powerpc/ftrace: Trace function graph entry before updating index 2012-07-27 11:42:34 +10:00
head_8xx.S powerpc: Call do_page_fault() with interrupts off 2012-03-09 10:55:08 +11:00
head_32.S powerpc: Call do_page_fault() with interrupts off 2012-03-09 10:55:08 +11:00
head_40x.S powerpc: Call do_page_fault() with interrupts off 2012-03-09 10:55:08 +11:00
head_44x.S Merge branch 'next' of git://git.kernel.org/pub/scm/virt/kvm/kvm 2012-05-24 16:17:30 -07:00
head_64.S powerpc: Rework lazy-interrupt handling 2012-03-09 13:25:06 +11:00
head_booke.h KVM: PPC: booke: category E.HV (GS-mode) support 2012-04-08 12:51:19 +03:00
head_fsl_booke.S Merge remote-tracking branch 'kumar/next' into next 2012-07-13 13:38:26 +10:00
hw_breakpoint.c powerpc: Fix null pointer deref in perf hardware breakpoints 2012-08-24 20:26:04 +10:00
ibmebus.c Merge branch 'for-linus' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 2012-04-04 17:13:43 -07:00
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: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
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
idle.c powerpc: Remove unused cpu_idle_wait() 2012-05-08 12:35:07 +02:00
io-workarounds.c powerpc: io-workarounds.c was implicitly getting init_mm 2011-10-31 19:30:37 -04:00
io.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
iomap.c powerpc: switch to GENERIC_PCI_IOMAP 2011-11-28 21:13:18 +02:00
iommu.c powerpc/iommu: Fix iommu pool initialization 2012-07-13 17:45:49 +10:00
irq.c powerpc: Fix build of some debug irq code 2012-07-10 19:16:20 +10:00
isa-bridge.c powerpc: Remove FW_FEATURE ISERIES from arch code 2012-03-21 11:16:11 +11:00
jump_label.c powerpc: Fix build breakage in jump_label.c 2011-11-16 14:25:19 +11:00
kgdb.c powerpc/kgdb: Restore current_thread_info properly 2012-08-24 20:26:06 +10:00
kprobes.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
kvm_emul.S KVM: PPC: Not optimizing MSR_CE and MSR_ME with paravirt. 2012-05-30 11:43:11 +02:00
kvm.c KVM: PPC: use definitions in epapr header for hcalls 2012-10-05 23:38:36 +02:00
l2cr_6xx.S Fix common misspellings 2011-03-31 11:26:23 -03:00
legacy_serial.c powerpc: Fix build on some non-freescale platforms 2012-01-25 13:33:22 +11:00
lparcfg.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
machine_kexec_32.c treewide: convert uses of ATTRIB_NORETURN to __noreturn 2012-01-12 20:13:03 -08:00
machine_kexec_64.c treewide: convert uses of ATTRIB_NORETURN to __noreturn 2012-01-12 20:13:03 -08:00
machine_kexec.c powerpc/irqdomain: Fix broken NR_IRQ references 2012-04-30 10:45:26 +10:00
Makefile KVM: PPC: Factor out guest epapr initialization 2012-05-30 11:43:10 +02:00
misc_32.S powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly 2012-07-11 14:18:22 +10:00
misc_64.S powerpc: Fixes for instructions not using correct register naming 2012-07-10 19:18:16 +10:00
misc.S powerpc: Remove legacy iSeries bits from assembly files 2012-03-09 10:54:59 +11:00
module_32.c powerpc: Fix kernel panic during kernel module load 2012-06-08 19:59:08 +10:00
module_64.c modules: make arch's use default loader hooks 2011-07-24 22:06:04 +09:30
module.c powerpc: remove non-required uses of include <linux/module.h> 2011-10-31 19:30:44 -04:00
msi.c
nvram_64.c powerpc/nvram: Generalize code for OS partitions in NVRAM 2011-03-04 18:19:04 +11:00
of_platform.c powerpc/eeh: Introduce EEH device 2012-03-09 11:39:29 +11:00
paca.c powerpc: Remove iseries specific fields in lppaca 2012-04-30 15:37:16 +10:00
pci_32.c powerpc/PCI: compute I/O space bus-to-resource offset consistently 2012-03-20 10:41:44 -07:00
pci_64.c PCI: replace struct pci_bus secondary/subordinate with busn_res 2012-06-13 15:42:22 -06:00
pci_dn.c powerpc/powernv: PCI support for p7IOC under OPAL v2 2011-11-25 14:53:15 +11:00
pci_of_scan.c PCI changes for the 3.6 merge window: 2012-07-24 16:17:07 -07:00
pci-common.c powerpc/PCI: Override pcibios_window_alignment() 2012-09-11 16:59:46 -06:00
pmc.c bug.h: add include of it to various implicit C users 2012-02-29 17:15:08 -05:00
ppc32.h
ppc_ksyms.c powerpc/epapr: export epapr_hypercall_start 2012-10-05 23:38:40 +02:00
ppc_save_regs.S Fix common misspellings 2011-03-31 11:26:23 -03:00
proc_powerpc.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
process.c Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-10-01 10:43:39 -07:00
prom_init_check.sh powerpc/powernv: Get kernel command line accross OPAL takeover 2011-09-20 16:09:48 +10:00
prom_init.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2012-10-04 09:06:34 -07:00
prom_parse.c powerpc: remove non-required uses of include <linux/module.h> 2011-10-31 19:30:44 -04:00
prom.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
ptrace32.c powerpc: Remove old powerpc specific ptrace getregs/setregs calls 2012-04-30 15:37:28 +10:00
ptrace.c Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2012-05-23 09:02:42 -07:00
reloc_32.S powerpc: Process dynamic relocations for kernel 2011-12-20 10:21:08 -05:00
reloc_64.S
rtas_flash.c powerpc: Lack of firmware flash support is not an error 2012-07-27 11:42:33 +10:00
rtas_pci.c Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci 2012-03-23 14:02:12 -07:00
rtas-proc.c powerpc: Move /proc/ppc64 to /proc/powerpc update 2010-01-15 13:26:17 +11:00
rtas-rtc.c powerpc/rtas-rtc: remove sideeffects of printk_ratelimit 2011-06-29 15:30:43 +10:00
rtas.c Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
rtasd.c powerpc/pseries: Cancel RTAS event scan before firmware flash 2011-11-25 14:11:29 +11:00
setup_32.c powerpc/watchdog: move booke watchdog param related code to setup-common.c 2012-07-11 07:44:03 -05:00
setup_64.c Disintegrate and delete asm/system.h 2012-03-28 15:58:21 -07:00
setup-common.c powerpc/watchdog: move booke watchdog param related code to setup-common.c 2012-07-11 07:44:03 -05:00
setup.h
signal_32.c powerpc: get rid of restore_sigmask() 2012-06-01 12:58:51 -04:00
signal_64.c powerpc: get rid of restore_sigmask() 2012-06-01 12:58:51 -04:00
signal.c new helper: signal_delivered() 2012-06-01 12:58:52 -04:00
signal.h powerpc: get rid of restore_sigmask() 2012-06-01 12:58:51 -04:00
smp-tbsync.c atomic: use <linux/atomic.h> 2011-07-26 16:49:47 -07:00
smp.c KVM: PPC: Book3S HV: Allow KVM guests to stop secondary threads coming online 2012-10-30 10:54:53 +01:00
softemu8xx.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
stacktrace.c powerpc: various straight conversions from module.h --> export.h 2011-10-31 19:30:44 -04:00
suspend.c update email address 2010-07-19 10:56:54 +02:00
swsusp_32.S Fix common misspellings 2011-03-31 11:26:23 -03:00
swsusp_64.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
swsusp_asm64.S
swsusp_booke.S powerpc/fsl-booke: Add hibernation support for FSL BookE processors 2010-05-21 07:41:53 -05:00
swsusp.c Disintegrate asm/system.h for PowerPC 2012-03-28 18:30:02 +01:00
sys_ppc32.c compat: fs: Generic compat_sys_sendfile implementation 2012-10-02 21:35:55 -04:00
syscalls.c powerpc: Fix personality handling in ppc64_personality() 2012-08-24 20:26:07 +10:00
sysfs.c powerpc: Keep thread.dscr and thread.dscr_inherit in sync 2012-09-05 16:05:21 +10:00
systbl_chk.c
systbl_chk.sh
systbl.S
tau_6xx.c tree-wide: fix assorted typos all over the place 2009-12-04 15:39:55 +01:00
time.c Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2012-10-01 10:43:39 -07:00
traps.c powerpc: Keep thread.dscr and thread.dscr_inherit in sync 2012-09-05 16:05:21 +10:00
udbg_16550.c powerpc: Add early debug for WSP platforms 2011-05-06 13:32:41 +10:00
udbg.c powerpc: Random little legacy iSeries removal tidy ups 2012-03-28 11:33:23 +11:00
vdso.c powerpc: Add VDSO version of getcpu 2012-07-11 14:18:40 +10:00
vecemu.c
vector.S powerpc: Optimise enable_kernel_altivec 2012-04-30 15:37:17 +10:00
vio.c Merge branch 'for-linus-for-3.6-rc1' of git://git.linaro.org/people/mszyprowski/linux-dma-mapping 2012-07-30 10:11:31 -07:00
vmlinux.lds.S powerpc: Remove legacy iSeries bits from assembly files 2012-03-09 10:54:59 +11:00