AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/x86/kvm
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Wanpeng Li e1be9ac8e6 KVM: X86: Narrow down the IPI fastpath to single target IPI 
The original single target IPI fastpath patch forgot to filter the
ICR destination shorthand field. Multicast IPI is not suitable for
this feature since wakeup the multiple sleeping vCPUs will extend
the interrupt disabled time, it especially worse in the over-subscribe
and VM has a little bit more vCPUs scenario. Let's narrow it down to
single target IPI.

Two VMs, each is 76 vCPUs, one running 'ebizzy -M', the other
running cyclictest on all vCPUs, w/ this patch, the avg score
of cyclictest can improve more than 5%. (pv tlb, pv ipi, pv
sched yield are disabled during testing to avoid the disturb).

Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1585189202-1708-3-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-03-26 05:44:21 -04:00
..
mmu KVM: x86/mmu: Fix struct guest_walker arrays for 5-level paging 2020-02-12 20:09:44 +01:00
vmx KVM: VMX: don't allow memory operands for inline asm that modifies SP 2020-03-23 15:40:51 -04:00
cpuid.c kvm/svm: PKU not currently supported 2020-01-27 19:59:35 +01:00
cpuid.h KVM: x86: Refactor and rename bit() to feature_bit() macro 2020-01-21 14:45:28 +01:00
debugfs.c KVM: no need to check return value of debugfs_create functions 2019-08-05 12:55:49 +02:00
emulate.c KVM: x86: clear stale x86_emulate_ctxt->intercept value 2020-03-03 17:38:16 +01:00
hyperv.c kvm: x86: hyperv: Use APICv update request interface 2020-02-05 15:17:43 +01:00
hyperv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 2019-06-19 17:09:53 +02:00
i8254.c kvm: i8254: Deactivate APICv when using in-kernel PIT re-injection mode. 2020-02-05 15:17:44 +01:00
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: x86: Initializing all kvm_lapic_irq fields in ioapic_write_indirect 2020-03-14 10:46:01 +01:00
ioapic.h KVM: X86: Move irrelevant declarations out of ioapic.h 2020-01-08 17:33:14 +01:00
irq_comm.c KVM: x86: don't notify userspace IOAPIC on edge-triggered interrupt EOI 2020-02-21 18:04:57 +01:00
irq.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 320 2019-06-05 17:37:05 +02:00
irq.h KVM: X86: Move irrelevant declarations out of ioapic.h 2020-01-08 17:33:14 +01:00
Kconfig KVM: fix Kconfig menu text for -Werror 2020-03-05 15:27:43 +01:00
kvm_cache_regs.h KVM: x86: Fold decache_cr3() into cache_reg() 2019-10-22 13:34:16 +02:00
lapic.c KVM: LAPIC: Also cancel preemption timer when disarm LAPIC timer 2020-03-24 07:25:20 -04:00
lapic.h kvm: lapic: Introduce APICv update helper function 2020-02-05 15:17:40 +01:00
Makefile KVM: allow disabling -Werror 2020-02-28 10:45:28 +01:00
mmu_audit.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 499 2019-06-19 17:09:53 +02:00
mmu.h KVM: x86/mmu: Avoid retpoline on ->page_fault() with TDP 2020-02-12 20:09:42 +01:00
mmutrace.h KVM: x86: fix incorrect comparison in trace event 2020-02-20 18:13:44 +01:00
mtrr.c KVM: x86: Protect MSR-based index computations in fixed_msr_to_seg_unit() from Spectre-v1/L1TF attacks 2020-01-27 19:59:39 +01:00
pmu_amd.c KVM: x86/vPMU: Add lazy mechanism to release perf_event per vPMC 2019-11-15 11:44:10 +01:00
pmu.c Merge branch 'core-rcu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-11-26 15:42:43 -08:00
pmu.h KVM: x86: Protect MSR-based index computations in pmu.h from Spectre-v1/L1TF attacks 2020-01-27 19:59:40 +01:00
svm.c KVM: SVM: Issue WBINVD after deactivating an SEV guest 2020-03-23 09:01:04 -04:00
trace.h kvm: x86: Add APICv (de)activate request trace points 2020-02-05 15:17:41 +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
x86.c KVM: X86: Narrow down the IPI fastpath to single target IPI 2020-03-26 05:44:21 -04:00
x86.h KVM: x86: Take a u64 when checking for a valid dr7 value 2020-02-05 15:17:45 +01:00