[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [PATCH V3 03/13] x86/HV: Add new hvcall guest address host visibility support
On 8/10/2021 7:03 PM, Wei Liu wrote: diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index 0bb4d9ca7a55..b3683083208a 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -607,6 +607,12 @@ EXPORT_SYMBOL_GPL(hv_get_isolation_type);bool hv_is_isolation_supported(void){ + if (!cpu_feature_enabled(X86_FEATURE_HYPERVISOR)) + return 0;Nit: false instead of 0. OK. Will fix in the next version. +int hv_mark_gpa_visibility(u16 count, const u64 pfn[], + enum hv_mem_host_visibility visibility) +{ + struct hv_gpa_range_for_visibility **input_pcpu, *input; + u16 pages_processed; + u64 hv_status; + unsigned long flags; + + /* no-op if partition isolation is not enabled */ + if (!hv_is_isolation_supported()) + return 0; + + if (count > HV_MAX_MODIFY_GPA_REP_COUNT) { + pr_err("Hyper-V: GPA count:%d exceeds supported:%lu\n", count, + HV_MAX_MODIFY_GPA_REP_COUNT); + return -EINVAL; + } + + local_irq_save(flags); + input_pcpu = (struct hv_gpa_range_for_visibility **) + this_cpu_ptr(hyperv_pcpu_input_arg); + input = *input_pcpu; + if (unlikely(!input)) { + local_irq_restore(flags); + return -EINVAL; + } + + input->partition_id = HV_PARTITION_ID_SELF; + input->host_visibility = visibility; + input->reserved0 = 0; + input->reserved1 = 0; + memcpy((void *)input->gpa_page_list, pfn, count * sizeof(*pfn)); + hv_status = hv_do_rep_hypercall( + HVCALL_MODIFY_SPARSE_GPA_PAGE_HOST_VISIBILITY, count, + 0, input, &pages_processed); + local_irq_restore(flags); + + if (!(hv_status & HV_HYPERCALL_RESULT_MASK)) + return 0; + + return hv_status & HV_HYPERCALL_RESULT_MASK;Joseph introduced a few helper functions in 753ed9c95c37d. They will make the code simpler. OK. Will update in the next version. Thanks.
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