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6f0f23ef76
linux/arch/x86/kvm
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Josh Poimboeuf 6f0f23ef76 KVM: x86: Add IBPB_BRTYPE support 
Add support for the IBPB_BRTYPE CPUID flag, which indicates that IBPB
includes branch type prediction flushing.

Note, like SRSO_NO, advertise support for IBPB_BRTYPE even if it's not
enumerated by in the raw CPUID, i.e. bypass the cpuid_count() in
__kvm_cpu_cap_mask().  Some CPUs that gained support via a uCode patch
don't report IBPB_BRTYPE via CPUID (the kernel forces the flag).

Opportunistically use kvm_cpu_cap_check_and_set() for SRSO_NO instead
of manually querying host support (cpu_feature_enabled() and
boot_cpu_has() yield the same end result in this case).

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Link: https://lore.kernel.org/r/79d5f5914fb42c2c62418ffbcd78f138645ded21.1692919072.git.jpoimboe@kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
2023-10-04 15:15:52 -07:00
..
mmu KVM: x86/mmu: Stop zapping invalidated TDP MMU roots asynchronously 2023-09-23 05:35:48 -04:00
svm KVM: SVM: Do not use user return MSR support for virtualized TSC_AUX 2023-09-23 05:35:49 -04:00
vmx ARM: 2023-09-07 13:52:20 -07:00
.gitignore KVM: x86: use a separate asm-offsets.c file 2022-11-09 12:10:17 -05:00
cpuid.c KVM: x86: Add IBPB_BRTYPE support 2023-10-04 15:15:52 -07:00
cpuid.h KVM: x86: Add a framework for enabling KVM-governed x86 features 2023-08-17 11:38:27 -07:00
debugfs.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
emulate.c KVM: x86: Remove break statements that will never be executed 2023-08-17 11:28:00 -07:00
fpu.h KVM: x86: Move FPU register accessors into fpu.h 2021-06-17 13:09:24 -04:00
governed_features.h KVM: nSVM: Use KVM-governed feature framework to track "vNMI enabled" 2023-08-17 11:43:31 -07:00
hyperv.c KVM: x86: Remove break statements that will never be executed 2023-08-17 11:28:00 -07:00
hyperv.h KVM: x86: Hyper-V invariant TSC control 2022-12-29 15:33:29 -05:00
i8254.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
i8254.h KVM: x86: PIT: Preserve state of speaker port data bit 2022-06-08 13:06:20 -04:00
i8259.c KVM: x86: Fix poll command 2023-06-01 13:44:13 -07:00
ioapic.c KVM: x86/ioapic: Resample the pending state of an IRQ when unmasking 2023-03-27 10:13:28 -04:00
ioapic.h x86/kvm: remove unused ack_notifier callbacks 2021-11-18 07:05:57 -05:00
irq_comm.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
irq.c KVM: x86: Unify pr_fmt to use module name for all KVM modules 2022-12-29 15:47:35 -05:00
irq.h x86/kvm: remove unused ack_notifier callbacks 2021-11-18 07:05:57 -05:00
Kconfig KVM: x86: Add CONFIG_KVM_MAX_NR_VCPUS to allow up to 4096 vCPUs 2023-09-28 09:25:19 -07:00
kvm_cache_regs.h KVM: x86: Add helpers to query individual CR0/CR4 bits 2023-03-22 10:10:53 -07:00
kvm_emulate.h KVM: x86: Remove x86_emulate_ops::guest_has_long_mode 2023-08-02 15:47:27 -07:00
kvm_onhyperv.c KVM: x86/mmu: Move filling of Hyper-V's TLB range struct into Hyper-V code 2023-04-10 15:17:29 -07:00
kvm_onhyperv.h s390: 2023-05-01 12:06:20 -07:00
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 changes for 6.6: 2023-08-31 13:36:33 -04:00
lapic.h KVM: x86: Split out logic to generate "readable" APIC regs mask to helper 2023-01-24 10:04:35 -08:00
Makefile KVM: x86: Introduce .hv_inject_synthetic_vmexit_post_tlb_flush() nested hook 2022-11-18 12:59:13 -05:00
mmu.h KVM: x86/mmu: Don't bounce through page-track mechanism for guest PTEs 2023-08-31 13:49:00 -04:00
mtrr.c KVM: x86: Make kvm_mtrr_valid() static now that there are no external users 2023-06-01 13:41:06 -07:00
pmu.c KVM: x86/pmu: Move .hw_event_available() check out of PMC filter helper 2023-08-02 16:44:36 -07:00
pmu.h KVM: x86/pmu: Disable vPMU if the minimum num of counters isn't met 2023-06-06 17:31:44 -07:00
reverse_cpuid.h KVM: x86: Advertise AMX-COMPLEX CPUID to userspace 2023-08-03 15:40:17 -07:00
smm.c KVM: x86: Remove redundant vcpu->arch.cr0 assignments 2023-09-27 12:57:48 -07:00
smm.h KVM: x86: smm: preserve interrupt shadow in SMRAM 2022-11-09 12:31:26 -05:00
trace.h KVM: x86/xen: Add CPL to Xen hypercall tracepoint 2022-11-28 13:31:01 -05:00
tss.h
x86.c KVM: x86: Force TLB flush on userspace changes to special registers 2023-09-27 12:58:33 -07:00
x86.h KVM: x86: Snapshot host's MSR_IA32_ARCH_CAPABILITIES 2023-08-02 16:37:26 -07:00
xen.c KVM: x86/xen: update Xen CPUID Leaf 4 (tsc info) sub-leaves, if present 2023-01-24 10:05:20 -08:00
xen.h KVM: x86/xen: update Xen CPUID Leaf 4 (tsc info) sub-leaves, if present 2023-01-24 10:05:20 -08:00