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7aa15842c1
linux/arch/powerpc/kvm
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Paul Mackerras 7aa15842c1 KVM: PPC: Book3S HV: Set RWMR on POWER8 so PURR/SPURR count correctly 
Although Linux doesn't use PURR and SPURR ((Scaled) Processor
Utilization of Resources Register), other OSes depend on them.
On POWER8 they count at a rate depending on whether the VCPU is
idle or running, the activity of the VCPU, and the value in the
RWMR (Region-Weighting Mode Register).  Hardware expects the
hypervisor to update the RWMR when a core is dispatched to reflect
the number of online VCPUs in the vcore.

This adds code to maintain a count in the vcore struct indicating
how many VCPUs are online.  In kvmppc_run_core we use that count
to set the RWMR register on POWER8.  If the core is split because
of a static or dynamic micro-threading mode, we use the value for
8 threads.  The RWMR value is not relevant when the host is
executing because Linux does not use the PURR or SPURR register,
so we don't bother saving and restoring the host value.

For the sake of old userspace which does not set the KVM_REG_PPC_ONLINE
register, we set online to 1 if it was 0 at the time of a KVM_RUN
ioctl.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2018-05-17 16:36:48 +10:00
..
book3s_32_mmu_host.c powerpc/mm: Move hash related mmu-*.h headers to book3s/ 2016-03-03 21:19:21 +11:00
book3s_32_mmu.c KVM: PPC: Book3S PR: Ratelimit copy data failure error messages 2017-02-17 14:03:35 +11:00
book3s_32_sr.S
book3s_64_mmu_host.c * ARM: HYP mode stub supports kexec/kdump on 32-bit; improved PMU 2017-05-08 12:37:56 -07:00
book3s_64_mmu_hv.c KVM: PPC: Remove unused kvm_unmap_hva callback 2018-03-19 10:08:29 +11:00
book3s_64_mmu_radix.c KVM: PPC: Book3S HV: Make radix clear pte when unmapping 2018-05-17 15:16:59 +10:00
book3s_64_mmu.c KVM: PPC: Book3S PR: Fix WIMG handling under pHyp 2018-01-10 20:45:00 +11:00
book3s_64_slb.S KVM: PPC: Book3S: Fix gas warning due to using r0 as immediate 0 2017-11-01 15:17:25 +11:00
book3s_64_vio_hv.c KVM: PPC: Remove unused kvm_unmap_hva callback 2018-03-19 10:08:29 +11:00
book3s_64_vio.c KVM: PPC: Book3S: Protect kvmppc_gpa_to_ua() with SRCU 2017-10-14 11:35:41 +11:00
book3s_emulate.c KVM: PPC: Book3S PR: Do not fail emulation with mtspr/mfspr for unknown SPRs 2017-04-20 11:39:32 +10:00
book3s_exports.c KVM: PPC: Make shared struct aka magic page guest endian 2014-05-30 14:26:21 +02:00
book3s_hv_builtin.c powerpc/64: Use array of paca pointers and allocate pacas individually 2018-03-30 23:34:23 +11:00
book3s_hv_hmi.c powerpc: move hmi.c to arch/powerpc/kvm/ 2016-09-09 16:18:07 +10:00
book3s_hv_interrupts.S powerpc/64s: Do not allocate lppaca if we are not virtualized 2018-03-30 23:34:22 +11:00
book3s_hv_ras.c Merge branch 'topic/ppc-kvm' into next 2018-01-21 22:43:43 +11:00
book3s_hv_rm_mmu.c KVM: PPC: Book3S HV: trace_tlbie must not be called in realmode 2018-04-11 12:35:33 +10:00
book3s_hv_rm_xics.c Merge branch 'kvm-ppc-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc into HEAD 2017-05-09 11:50:01 +02:00
book3s_hv_rm_xive.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
book3s_hv_rmhandlers.S KVM: PPC: Book 3S HV: Do ptesync in radix guest exit path 2018-05-17 15:17:13 +10:00
book3s_hv_tm_builtin.c KVM: PPC: Book3S HV: Work around transactional memory bugs in POWER9 2018-03-24 00:39:13 +11:00
book3s_hv_tm.c KVM: PPC: Book3S HV: Work around transactional memory bugs in POWER9 2018-03-24 00:39:13 +11:00
book3s_hv.c KVM: PPC: Book3S HV: Set RWMR on POWER8 so PURR/SPURR count correctly 2018-05-17 16:36:48 +10:00
book3s_interrupts.S KVM: PPC: Book3S PR: Fix svcpu copying with preemption enabled 2018-02-01 13:35:33 +11:00
book3s_mmu_hpte.c sched/headers: Prepare to use <linux/rcuupdate.h> instead of <linux/rculist.h> in <linux/sched.h> 2017-03-02 08:42:38 +01:00
book3s_paired_singles.c powerpc: Create disable_kernel_{fp,altivec,vsx,spe}() 2015-12-01 13:52:25 +11:00
book3s_pr_papr.c KVM: PPC: Book3S PR: Enable in-kernel TCE handlers for PR KVM 2017-10-14 16:38:19 +11:00
book3s_pr.c KVM: PPC: Remove unused kvm_unmap_hva callback 2018-03-19 10:08:29 +11:00
book3s_rmhandlers.S powerpc/64s: Simple RFI macro conversions 2018-01-10 03:07:30 +11:00
book3s_rtas.c KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller 2017-04-27 21:37:29 +10:00
book3s_segment.S powerpc/64s: Simple RFI macro conversions 2018-01-10 03:07:30 +11:00
book3s_xics.c powerpc: Use octal numbers for file permissions 2018-01-22 05:48:33 +11:00
book3s_xics.h KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller 2017-04-27 21:37:29 +10:00
book3s_xive_template.c KVM: PPC: Book3S HV: XIVE: Resend re-routed interrupts on CPU priority change 2018-05-17 15:17:06 +10:00
book3s_xive.c treewide/trivial: Remove ';;$' typo noise 2018-02-22 10:59:33 +01:00
book3s_xive.h KVM: PPC: Book3S HV: Enable use of the new XIVE "single escalation" feature 2018-01-19 12:10:21 +11:00
book3s.c KVM: PPC: Remove unused kvm_unmap_hva callback 2018-03-19 10:08:29 +11:00
book3s.h KVM: PPC: Remove unused kvm_unmap_hva callback 2018-03-19 10:08:29 +11:00
booke_emulate.c KVM: PPC: BOOKE: Emulate debug registers and exception 2014-09-22 10:11:33 +02:00
booke_interrupts.S KVM: PPC: Remove 440 support 2014-07-28 15:23:15 +02:00
booke.c powerpc/kvm/booke: Fix altivec related build break 2018-04-27 16:36:03 +10:00
booke.h KVM: PPC: Book3e: Add AltiVec support 2014-09-22 10:11:32 +02:00
bookehv_interrupts.S powerpc/kvm: common sw breakpoint instr across ppc 2014-09-22 10:11:36 +02:00
e500_emulate.c KVM: PPC: e500: Emulate TMCFG0 TMRN register 2015-10-15 15:58:16 +11:00
e500_mmu_host.c KVM: PPC: Remove unused kvm_unmap_hva callback 2018-03-19 10:08:29 +11:00
e500_mmu_host.h
e500_mmu.c KVM: PPC: e500: Rename jump labels in kvmppc_e500_tlb_init() 2016-09-13 14:32:47 +10:00
e500.c KVM: PPC: e500: Fix some NULL dereferences on error 2017-08-31 12:36:44 +10:00
e500.h kvm: rename pfn_t to kvm_pfn_t 2016-01-15 17:56:32 -08:00
e500mc.c KVM: PPC: e500mc: Fix a NULL dereference 2017-08-31 12:36:44 +10:00
emulate_loadstore.c KVM: PPC: Book3S: Add MMIO emulation for VMX instructions 2018-02-09 16:51:51 +11:00
emulate.c powerpc/64s: Remove POWER4 support 2018-04-01 00:47:50 +11:00
fpu.S
irq.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Kconfig Second PPC KVM update for 4.16 2018-02-09 22:03:06 +01:00
Makefile KVM: PPC: Book3S HV: Work around transactional memory bugs in POWER9 2018-03-24 00:39:13 +11:00
mpic.c Replace <asm/uaccess.h> with <linux/uaccess.h> globally 2016-12-24 11:46:01 -08:00
powerpc.c Merge branch 'topic/ppc-kvm' into next 2018-03-24 08:43:18 +11:00
timing.c KVM: PPC: Use seq_puts() in kvmppc_exit_timing_show() 2018-01-11 20:36:06 +11:00
timing.h KVM: PPC: Remove DCR handling 2014-07-28 19:29:15 +02:00
trace_book3s.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace_booke.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace_hv.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
trace_pr.h KVM: PPC: Remove unused kvm_unmap_hva callback 2018-03-19 10:08:29 +11:00
trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00