Currently in kvm_emulate_hypercall, KVM_HC_MAP_GPA_RANGE is checked specifically to decide whether a KVM hypercall needs to exit to userspace or not. Do the check based on the hypercall_exit_enabled field of struct kvm_arch. Also use the API is_kvm_hc_exit_enabled() to replace the opencode. --- v2: - Check the return value of __kvm_emulate_hypercall() before checking hypercall_exit_enabled to avoid an invalid KVM hypercall nr. https://lore.kernel.org/kvm/184d90a8-14a0-494a-9112-365417245911@xxxxxxxxxxxxxxx/ - Add a warning if a hypercall nr out of the range of hypercall_exit_enabled can express. Binbin Wu (2): KVM: x86: Check hypercall's exit to userspace generically KVM: x86: Use is_kvm_hc_exit_enabled() instead of opencode arch/x86/kvm/svm/sev.c | 4 ++-- arch/x86/kvm/x86.c | 6 +++--- arch/x86/kvm/x86.h | 7 +++++++ 3 files changed, 12 insertions(+), 5 deletions(-) base-commit: 332d2c1d713e232e163386c35a3ba0c1b90df83f -- 2.43.2
