The arch specific code may need to know if a particular gpa is valid and writable for the shared memory between the host and the guest. Currently, there are few places where it is used in RISC-V implementation. Given the nature of the function it may be used for other architectures. Hence, a common helper function is added. Suggested-by: Sean Christopherson Signed-off-by: Atish Patra --- include/linux/kvm_host.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 15656b7fba6c..eec5cbbcb4b3 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -1892,6 +1892,14 @@ static inline bool kvm_is_gpa_in_memslot(struct kvm *kvm, gpa_t gpa) return !kvm_is_error_hva(hva); } +static inline bool kvm_is_gpa_in_writable_memslot(struct kvm *kvm, gpa_t gpa) +{ + bool writable; + unsigned long hva = gfn_to_hva_prot(kvm, gpa_to_gfn(gpa), &writable); + + return !kvm_is_error_hva(hva) && writable; +} + static inline void kvm_gpc_mark_dirty_in_slot(struct gfn_to_pfn_cache *gpc) { lockdep_assert_held(&gpc->lock); -- 2.43.0