[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 7/8] x86/hyperv: retrieve vp_index from Hyper-V
This will be useful when invoking hypercall that targets specific vcpu(s). Signed-off-by: Wei Liu <liuwe@xxxxxxxxxxxxx> --- v2: 1. Fold into setup_pcpu_arg function --- xen/arch/x86/guest/hyperv/hyperv.c | 5 +++++ xen/include/asm-x86/guest/hyperv.h | 1 + 2 files changed, 6 insertions(+) diff --git a/xen/arch/x86/guest/hyperv/hyperv.c b/xen/arch/x86/guest/hyperv/hyperv.c index 03027bd453..5c5aed46cb 100644 --- a/xen/arch/x86/guest/hyperv/hyperv.c +++ b/xen/arch/x86/guest/hyperv/hyperv.c @@ -28,6 +28,7 @@ struct ms_hyperv_info __read_mostly ms_hyperv; extern char hv_hypercall_page[]; DEFINE_PER_CPU_READ_MOSTLY(struct hyperv_pcpu_page, hv_pcpu_input_arg); +DEFINE_PER_CPU_READ_MOSTLY(unsigned int, hv_vp_index); static const struct hypervisor_ops ops; const struct hypervisor_ops *__init hyperv_probe(void) @@ -89,6 +90,7 @@ static void setup_hypercall_pcpu_arg(void) struct page_info *pg; void *mapping; unsigned int cpu = smp_processor_id(); + uint64_t vp_index_msr; pg = alloc_domheap_page(NULL, 0); if ( !pg ) @@ -100,6 +102,9 @@ static void setup_hypercall_pcpu_arg(void) this_cpu(hv_pcpu_input_arg).maddr = page_to_maddr(pg); this_cpu(hv_pcpu_input_arg).mapping = mapping; + + rdmsrl(HV_X64_MSR_VP_INDEX, vp_index_msr); + this_cpu(hv_vp_index) = vp_index_msr; } static void __init setup(void) diff --git a/xen/include/asm-x86/guest/hyperv.h b/xen/include/asm-x86/guest/hyperv.h index 83f297468f..4b635829f3 100644 --- a/xen/include/asm-x86/guest/hyperv.h +++ b/xen/include/asm-x86/guest/hyperv.h @@ -70,6 +70,7 @@ struct hyperv_pcpu_page { void *mapping; }; DECLARE_PER_CPU(struct hyperv_pcpu_page, hv_pcpu_input_arg); +DECLARE_PER_CPU(unsigned int, hv_vp_index); const struct hypervisor_ops *hyperv_probe(void); -- 2.20.1 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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