Return -EIO when a KVM_BUG_ON() is tripped, as KVM's ABI is to return -EIO when a VM has been killed due to a KVM bug, not -EINVAL. Note, many (all?) of the affected paths never propagate the error code to userspace, i.e. this is about internal consistency more than anything else.
Reviewed-by: Rick Edgecombe <[email protected]> Reviewed-by: Ira Weiny <[email protected]> Reviewed-by: Binbin Wu <[email protected]> Signed-off-by: Sean Christopherson <[email protected]> --- arch/x86/kvm/vmx/tdx.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index c3bae6b96dc4..c242d73b6a7b 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1621,7 +1621,7 @@ static int tdx_mem_page_record_premap_cnt(struct kvm *kvm, gfn_t gfn, struct kvm_tdx *kvm_tdx = to_kvm_tdx(kvm); if (KVM_BUG_ON(kvm->arch.pre_fault_allowed, kvm)) - return -EINVAL; + return -EIO; /* nr_premapped will be decreased when tdh_mem_page_add() is called. */ atomic64_inc(&kvm_tdx->nr_premapped); @@ -1635,7 +1635,7 @@ static int tdx_sept_set_private_spte(struct kvm *kvm, gfn_t gfn, /* TODO: handle large pages. */ if (KVM_BUG_ON(level != PG_LEVEL_4K, kvm)) - return -EINVAL; + return -EIO; /* * Read 'pre_fault_allowed' before 'kvm_tdx->state'; see matching @@ -1658,10 +1658,10 @@ static int tdx_sept_drop_private_spte(struct kvm *kvm, gfn_t gfn, /* TODO: handle large pages. */ if (KVM_BUG_ON(level != PG_LEVEL_4K, kvm)) - return -EINVAL; + return -EIO; if (KVM_BUG_ON(!is_hkid_assigned(kvm_tdx), kvm)) - return -EINVAL; + return -EIO; /* * When zapping private page, write lock is held. So no race condition @@ -1846,7 +1846,7 @@ static int tdx_sept_free_private_spt(struct kvm *kvm, gfn_t gfn, * and slot move/deletion. */ if (KVM_BUG_ON(is_hkid_assigned(kvm_tdx), kvm)) - return -EINVAL; + return -EIO; /* * The HKID assigned to this TD was already freed and cache was @@ -1867,7 +1867,7 @@ static int tdx_sept_remove_private_spte(struct kvm *kvm, gfn_t gfn, * there can't be anything populated in the private EPT. */ if (KVM_BUG_ON(!is_hkid_assigned(to_kvm_tdx(kvm)), kvm)) - return -EINVAL; + return -EIO; ret = tdx_sept_zap_private_spte(kvm, gfn, level, page); if (ret <= 0) -- 2.51.1.930.gacf6e81ea2-goog
