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Jason Baron b3646477d4 KVM: x86: use static calls to reduce kvm_x86_ops overhead 
Convert kvm_x86_ops to use static calls. Note that all kvm_x86_ops are
covered here except for 'pmu_ops and 'nested ops'.

Here are some numbers running cpuid in a loop of 1 million calls averaged
over 5 runs, measured in the vm (lower is better).

Intel Xeon 3000MHz:

           |default    |mitigations=off
-------------------------------------
vanilla    |.671s      |.486s
static call|.573s(-15%)|.458s(-6%)

AMD EPYC 2500MHz:

           |default    |mitigations=off
-------------------------------------
vanilla    |.710s      |.609s
static call|.664s(-6%) |.609s(0%)

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Sean Christopherson <seanjc@google.com>
Signed-off-by: Jason Baron <jbaron@akamai.com>
Message-Id: <e057bf1b8a7ad15652df6eeba3f907ae758d3399.1610680941.git.jbaron@akamai.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-04 05:27:30 -05:00
..
mmu
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
svm
KVM: X86: prepend vmx/svm prefix to additional kvm_x86_ops functions
2021-02-04 05:27:29 -05:00
vmx
KVM: X86: prepend vmx/svm prefix to additional kvm_x86_ops functions
2021-02-04 05:27:29 -05:00
cpuid.c
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
cpuid.h
KVM: x86: reinstate vendor-agnostic check on SPEC_CTRL cpuid bits
2020-12-11 19:05:13 -05:00
debugfs.c
KVM: let kvm_destroy_vm_debugfs clean up vCPU debugfs directories
2020-06-04 11:00:54 -04:00
emulate.c
KVM: X86: Rename DR6_INIT to DR6_ACTIVE_LOW
2021-02-04 05:27:27 -05:00
hyperv.c
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
hyperv.h
KVM: x86: hyper-v: allow KVM_GET_SUPPORTED_HV_CPUID as a system ioctl
2020-11-15 09:49:11 -05:00
i8254.c
kvm: i8254: remove redundant assignment to pointer s
2020-06-11 12:35:18 -04:00
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: Refactor picdev_write() to prevent Spectre-v1/L1TF attacks
2020-01-27 19:59:37 +01:00
ioapic.c
KVM: ioapic: break infinite recursion on lazy EOI
2020-10-24 04:42:06 -04:00
ioapic.h
kvm/x86: Remove redundant function implementations
2020-05-27 13:11:10 -04:00
irq_comm.c
x86/kvm: Use msi_msg shadow structs
2020-10-28 20:26:26 +01:00
irq.c
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
irq.h
kvm/x86: Remove redundant function implementations
2020-05-27 13:11:10 -04:00
Kconfig
KVM: SVM: Add support for SEV-ES capability in KVM
2020-12-14 11:09:31 -05:00
kvm_cache_regs.h
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
kvm_emulate.h
ARM:
2020-04-02 15:13:15 -07:00
lapic.c
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
lapic.h
KVM: Stop using deprecated jump label APIs
2021-02-04 05:27:29 -05:00
Makefile
KVM: X86: Implement ring-based dirty memory tracking
2020-11-15 09:49:15 -05:00
mmu.h
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
mtrr.c
KVM: x86: remove bogus #GP injection
2020-12-15 05:18:30 -05:00
pmu.c
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
pmu.h
KVM: vmx/pmu: Release guest LBR event via lazy release mechanism
2021-02-04 05:27:26 -05:00
trace.h
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
tss.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
x86.c
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00
x86.h
KVM: x86: use static calls to reduce kvm_x86_ops overhead
2021-02-04 05:27:30 -05:00