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6c7b2202e4
linux/arch/x86/kvm
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Paolo Bonzini 6c7b2202e4 KVM: x86: avoid memslot check in NX hugepage recovery if it cannot succeed 
Since gfn_to_memslot() is relatively expensive, it helps to
skip it if it the memslot cannot possibly have dirty logging
enabled.  In order to do this, add to struct kvm a counter
of the number of log-page memslots.  While the correct value
can only be read with slots_lock taken, the NX recovery thread
is content with using an approximate value.  Therefore, the
counter is an atomic_t.

Based on https://lore.kernel.org/kvm/20221027200316.2221027-2-dmatlack@google.com/
by David Matlack.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-11-18 11:30:12 -05:00
..
mmu KVM: x86: avoid memslot check in NX hugepage recovery if it cannot succeed 2022-11-18 11:30:12 -05:00
svm Merge branch 'kvm-svm-harden' into HEAD 2022-11-17 11:51:09 -05:00
vmx Merge branch 'kvm-svm-harden' into HEAD 2022-11-17 11:51:09 -05:00
.gitignore KVM: x86: use a separate asm-offsets.c file 2022-11-09 12:10:17 -05:00
cpuid.c KVM: x86: Insert "AMD" in KVM_X86_FEATURE_PSFD 2022-11-09 12:31:15 -05:00
cpuid.h KVM: x86: Add dedicated helper to get CPUID entry with significant index 2022-07-14 11:38:32 -04:00
debugfs.c KVM: x86: Reduce refcount if single_open() fails in kvm_mmu_rmaps_stat_open() 2022-10-27 04:41:54 -04:00
emulate.c KVM: x86: move SMM exit to a new file 2022-11-09 12:31:18 -05:00
fpu.h KVM: x86: Move FPU register accessors into fpu.h 2021-06-17 13:09:24 -04:00
hyperv.c KVM: nVMX: Support PERF_GLOBAL_CTRL with enlightened VMCS 2022-09-26 12:02:47 -04:00
hyperv.h KVM: x86: Report error when setting CPUID if Hyper-V allocation fails 2022-09-26 12:02:39 -04:00
i8254.c KVM: x86: PIT: Preserve state of speaker port data bit 2022-06-08 13:06:20 -04:00
i8254.h KVM: x86: PIT: Preserve state of speaker port data bit 2022-06-08 13:06:20 -04:00
i8259.c KVM: x86/i8259: Remove a dead store of irq in a conditional block 2022-04-02 05:41:19 -04:00
ioapic.c KVM: x86/ioapic: Remove unused "addr" and "length" of ioapic_read_indirect() 2022-02-10 13:47:13 -05:00
ioapic.h x86/kvm: remove unused ack_notifier callbacks 2021-11-18 07:05:57 -05:00
irq_comm.c KVM: x86/xen: Make kvm_xen_set_evtchn() reusable from other places 2022-04-02 05:41:14 -04:00
irq.c KVM: replace direct irq.h inclusion 2022-11-09 12:31:37 -05:00
irq.h x86/kvm: remove unused ack_notifier callbacks 2021-11-18 07:05:57 -05:00
Kconfig KVM: allow compiling out SMM support 2022-11-09 12:31:19 -05:00
kvm_cache_regs.h KVM: x86: start moving SMM-related functions to new files 2022-11-09 12:31:16 -05:00
kvm_emulate.h KVM: x86: do not define SMM-related constants if SMM disabled 2022-11-09 12:31:21 -05:00
kvm_onhyperv.c KVM: x86: Uninline and export hv_track_root_tdp() 2022-02-10 13:47:19 -05:00
kvm_onhyperv.h KVM: x86: Uninline and export hv_track_root_tdp() 2022-02-10 13:47:19 -05:00
kvm-asm-offsets.c KVM: SVM: move MSR_IA32_SPEC_CTRL save/restore to assembly 2022-11-09 12:25:53 -05:00
lapic.c KVM: x86: start moving SMM-related functions to new files 2022-11-09 12:31:16 -05:00
lapic.h KVM: x86: start moving SMM-related functions to new files 2022-11-09 12:31:16 -05:00
Makefile KVM: allow compiling out SMM support 2022-11-09 12:31:19 -05:00
mmu.h KVM: SVM: Disable SEV-ES support if MMIO caching is disable 2022-08-10 15:08:25 -04:00
mtrr.c KVM: x86: Add helper to consolidate "raw" reserved GPA mask calculations 2021-02-04 09:27:30 -05:00
pmu.c KVM: x86/pmu: Defer counter emulated overflow via pmc->prev_counter 2022-11-09 12:31:36 -05:00
pmu.h KVM: x86/pmu: Defer reprogram_counter() to kvm_pmu_handle_event() 2022-11-09 12:31:36 -05:00
reverse_cpuid.h KVM: SEV: Mask CPUID[0x8000001F].eax according to supported features 2021-04-26 05:27:15 -04:00
smm.c KVM: x86: smm: preserve interrupt shadow in SMRAM 2022-11-09 12:31:26 -05:00
smm.h KVM: x86: smm: preserve interrupt shadow in SMRAM 2022-11-09 12:31:26 -05:00
trace.h KVM: x86: Print guest pgd in kvm_nested_vmenter() 2022-09-26 12:02:33 -04:00
tss.h
x86.c Merge branch 'kvm-svm-harden' into HEAD 2022-11-17 11:51:09 -05:00
x86.h KVM: x86: Track supported PERF_CAPABILITIES in kvm_caps 2022-11-09 12:31:11 -05:00
xen.c KVM: x86/xen: Fix eventfd error handling in kvm_xen_eventfd_assign() 2022-10-28 06:47:26 -04:00
xen.h KVM: x86: do not set st->preempted when going back to user space 2022-06-08 04:21:06 -04:00