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author | Paolo Bonzini <pbonzini@redhat.com> | 2023-04-26 22:46:52 +0300 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-04-26 22:46:52 +0300 |
commit | 4f382a79a66b1a926e30f6d89295fc8fe2c4a86e (patch) | |
tree | 0580196e599bdee587bc92fc913853528bb69bc5 /arch/x86/include/asm/kvm_host.h | |
parent | b3c129e33e91fa3dc3171f45b90edb35e60dbc33 (diff) | |
parent | 36fe1b29b3cae48f781011abd5a0b9e938f5b35f (diff) | |
download | linux-4f382a79a66b1a926e30f6d89295fc8fe2c4a86e.tar.xz |
Merge tag 'kvmarm-6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm64 updates for 6.4
- Numerous fixes for the pathological lock inversion issue that
plagued KVM/arm64 since... forever.
- New framework allowing SMCCC-compliant hypercalls to be forwarded
to userspace, hopefully paving the way for some more features
being moved to VMMs rather than be implemented in the kernel.
- Large rework of the timer code to allow a VM-wide offset to be
applied to both virtual and physical counters as well as a
per-timer, per-vcpu offset that complements the global one.
This last part allows the NV timer code to be implemented on
top.
- A small set of fixes to make sure that we don't change anything
affecting the EL1&0 translation regime just after having having
taken an exception to EL2 until we have executed a DSB. This
ensures that speculative walks started in EL1&0 have completed.
- The usual selftest fixes and improvements.
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
-rw-r--r-- | arch/x86/include/asm/kvm_host.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index a45de1118a42..a0e58ca0d7f2 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -2207,4 +2207,11 @@ int memslot_rmap_alloc(struct kvm_memory_slot *slot, unsigned long npages); KVM_X86_QUIRK_FIX_HYPERCALL_INSN | \ KVM_X86_QUIRK_MWAIT_NEVER_UD_FAULTS) +/* + * KVM previously used a u32 field in kvm_run to indicate the hypercall was + * initiated from long mode. KVM now sets bit 0 to indicate long mode, but the + * remaining 31 lower bits must be 0 to preserve ABI. + */ +#define KVM_EXIT_HYPERCALL_MBZ GENMASK_ULL(31, 1) + #endif /* _ASM_X86_KVM_HOST_H */ |