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x86/smpboot: Load TSS and getcpu GDT entry before loading IDT

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The IDT on 64-bit contains vectors which use paranoid_entry() and/or IST
stacks. To make these vectors work, the TSS and the getcpu GDT entry need
to be set up before the IDT is loaded.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20200907131613.12703-68-joro@8bytes.org
This commit is contained in:
Joerg Roedel
2020-09-07 15:16:08 +02:00
committed by Borislav Petkov
parent 8940ac9ced
commit 520d030852
3 changed files with 25 additions and 1 deletions
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2
arch/x86/kernel/smpboot.c
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@@ -227,7 +227,7 @@ static void notrace start_secondary(void *unused)
load_cr3(swapper_pg_dir);
__flush_tlb_all();
#endif
load_current_idt();
cpu_init_exception_handling();
cpu_init();
x86_cpuinit.early_percpu_clock_init();
preempt_disable();