Messages in this thread | | | From | Thomas Gleixner <> | Subject | Re: [patch 02/38] x86/cpu: Use native_wrmsrl() in load_percpu_segment() | Date | Mon, 18 Jul 2022 08:54:41 +0200 |
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On Mon, Jul 18 2022 at 07:11, Juergen Gross wrote: > On 17.07.22 23:54, Thomas Gleixner wrote: >> void __init native_smp_prepare_boot_cpu(void) >> { >> int me = smp_processor_id(); >> - switch_to_new_gdt(me); >> + >> + /* SMP invokes this from setup_per_cpu_areas() */ >> + if (!IS_ENABLED(CONFIG_SMP)) >> + switch_to_real_gdt(me); >> + >> /* already set me in cpu_online_mask in boot_cpu_init() */ >> cpumask_set_cpu(me, cpu_callout_mask); >> cpu_set_state_online(me); >> --- a/arch/x86/xen/enlighten_pv.c >> +++ b/arch/x86/xen/enlighten_pv.c >> @@ -1164,7 +1164,7 @@ static void __init xen_setup_gdt(int cpu >> pv_ops.cpu.write_gdt_entry = xen_write_gdt_entry_boot; >> pv_ops.cpu.load_gdt = xen_load_gdt_boot; >> >> - switch_to_new_gdt(cpu); >> + switch_to_real_gdt(cpu); > > ... can't you use the paravirt variant of load_gdt in switch_to_real_gdt() ?
That does not solve the problem of having a disagreement between GDT and GS_BASE. Let me dig into this some more.
Thanks,
tglx
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