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c992384bde
linux/arch/x86/kvm
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Paolo Bonzini c992384bde KVM: vmx: speed up MSR bitmap merge 
The bulk of the MSR bitmap is either immutable, or can be copied from
the L1 bitmap.  By initializing it at VMXON time, and copying the mutable
parts one long at a time on vmentry (rather than one bit), about 4000
clock cycles (30%) can be saved on a nested VMLAUNCH/VMRESUME.

The resulting for loop only has four iterations, so it is cheap enough
to reinitialize the MSR write bitmaps on every iteration, and it makes
the code simpler.

Suggested-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
2018-01-16 16:52:52 +01:00
..
cpuid.c Merge branch 'sev-v9-p2' of https://github.com/codomania/kvm 2018-01-16 16:35:32 +01:00
cpuid.h KVM: x86: Fix CPUID function for word 6 (80000001_ECX) 2017-11-17 13:20:22 +01:00
debugfs.c kvm: x86: export TSC information to user-space 2016-09-16 16:57:48 +02:00
emulate.c KVM: x86: emulate RDPID 2017-12-14 09:26:40 +01:00
hyperv.c KVM: X86: implement the logic for spinlock optimization 2017-08-08 10:57:43 +02:00
hyperv.h kvm: x86: hyperv: make VP_INDEX managed by userspace 2017-07-14 16:28:18 +02:00
i8254.c KVM: x86: take slots_lock in kvm_free_pit 2017-07-12 22:38:26 +02:00
i8254.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
i8259.c KVM: x86: simplify pic_ioport_read() 2017-04-12 20:17:15 +02:00
ioapic.c KVM: x86: ioapic: Preserve read-only values in the redirection table 2017-11-17 13:20:21 +01:00
ioapic.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
irq_comm.c KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING 2017-05-02 14:45:45 +02:00
irq.c KVM: nVMX: Fix injection to L2 when L1 don't intercept external-interrupts 2018-01-16 16:40:09 +01:00
irq.h KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING 2017-05-02 14:45:45 +02:00
Kconfig KVM: x86: prefer "depends on" to "select" for SEV 2018-01-16 16:38:32 +01:00
kvm_cache_regs.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lapic.c KVM: x86: Change __kvm_apic_update_irr() to also return if max IRR updated 2018-01-16 16:40:09 +01:00
lapic.h KVM: x86: Change __kvm_apic_update_irr() to also return if max IRR updated 2018-01-16 16:40:09 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmu_audit.c KVM: x86: MMU: make array audit_point_name static 2017-12-14 09:26:41 +01:00
mmu.c KVM: MMU: consider host cache mode in MMIO page check 2018-01-16 16:40:09 +01:00
mmu.h First batch of KVM changes for 4.15 2017-11-16 13:00:24 -08:00
mmutrace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mtrr.c KVM: x86: generalize guest_cpuid_has_ helpers 2017-08-07 16:11:50 +02:00
page_track.c locking/atomics: COCCINELLE/treewide: Convert trivial ACCESS_ONCE() patterns to READ_ONCE()/WRITE_ONCE() 2017-10-25 11:01:08 +02:00
paging_tmpl.h KVM: x86: extend usage of RET_MMIO_PF_* constants 2017-10-12 14:01:56 +02:00
pmu_amd.c perf/x86/amd: Make HW_CACHE_REFERENCES and HW_CACHE_MISSES measure L2 2016-09-16 16:19:49 +02:00
pmu_intel.c KVM: x86/vPMU: fix undefined shift in intel_pmu_refresh() 2017-05-19 19:59:27 +02:00
pmu.c KVM: x86: never specify a sample period for virtualized in_tx_cp counters 2017-03-01 14:19:46 +01:00
pmu.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
svm.c KVM: x86: Optimization: Create SVM stubs for sync_pir_to_irr() 2018-01-16 16:40:09 +01:00
trace.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tss.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
vmx_shadow_fields.h KVM: nVMX: track dirty state of non-shadowed VMCS fields 2018-01-16 16:50:13 +01:00
vmx.c KVM: vmx: speed up MSR bitmap merge 2018-01-16 16:52:52 +01:00
x86.c KVM: x86: Optimization: Create SVM stubs for sync_pir_to_irr() 2018-01-16 16:40:09 +01:00
x86.h KVM: nVMX: Fix bug of injecting L2 exception into L1 2018-01-16 16:40:09 +01:00