Microsoft Hypervisor requires the root partition to make a few hypercalls to setup application processors before they can be used.
Signed-off-by: Lillian Grassin-Drake <[email protected]> Signed-off-by: Sunil Muthuswamy <[email protected]> Co-Developed-by: Lillian Grassin-Drake <[email protected]> Co-Developed-by: Sunil Muthuswamy <[email protected]> Signed-off-by: Wei Liu <[email protected]> --- CPU hotplug and unplug is not yet supported in this setup, so those paths remain untouched. --- arch/x86/kernel/cpu/mshyperv.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 1bf57d310f78..7522cae02759 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -203,6 +203,31 @@ static void __init hv_smp_prepare_boot_cpu(void) hv_init_spinlocks(); #endif } + +static void __init hv_smp_prepare_cpus(unsigned int max_cpus) +{ +#if defined(CONFIG_X86_64) + int i; + int vp_index = 1; + int ret; + + native_smp_prepare_cpus(max_cpus); + + for_each_present_cpu(i) { + if (i == 0) + continue; + ret = hv_call_add_logical_proc(numa_cpu_node(i), i, cpu_physical_id(i)); + BUG_ON(ret); + } + + for_each_present_cpu(i) { + if (i == 0) + continue; + ret = hv_call_create_vp(numa_cpu_node(i), hv_current_partition_id, vp_index++, i); + BUG_ON(ret); + } +#endif +} #endif static void __init ms_hyperv_init_platform(void) @@ -359,6 +384,8 @@ static void __init ms_hyperv_init_platform(void) # ifdef CONFIG_SMP smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu; + if (hv_root_partition) + smp_ops.smp_prepare_cpus = hv_smp_prepare_cpus; # endif /* -- 2.20.1
