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| author | Brian Gerst <brgerst@gmail.com> | 2023-03-17 01:21:04 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2023-03-21 15:35:53 +0300 |
| commit | c253b64020c7a7c7a1f6adf8922456614be0f665 (patch) | |
| tree | ef92b48b21b2e64c0e61ed5e110003747e6c05f7 /arch/x86/kernel/head_64.S | |
| parent | 3adee777ad0d328e76ca9015cb7924134a992e81 (diff) | |
| download | linux-c253b64020c7a7c7a1f6adf8922456614be0f665.tar.xz | |
x86/smpboot: Remove early_gdt_descr on 64-bit
Build the GDT descriptor on the stack instead.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Usama Arif <usama.arif@bytedance.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Usama Arif <usama.arif@bytedance.com>
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Link: https://lore.kernel.org/r/20230316222109.1940300-8-usama.arif@bytedance.com
Diffstat (limited to 'arch/x86/kernel/head_64.S')
| -rw-r--r-- | arch/x86/kernel/head_64.S | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S index cc1b145055ac..a5b46c2fba05 100644 --- a/arch/x86/kernel/head_64.S +++ b/arch/x86/kernel/head_64.S @@ -265,7 +265,12 @@ SYM_INNER_LABEL(secondary_startup_64_no_verify, SYM_L_GLOBAL) * addresses where we're currently running on. We have to do that here * because in 32bit we couldn't load a 64bit linear address. */ - lgdt early_gdt_descr(%rip) + subq $16, %rsp + movw $(GDT_SIZE-1), (%rsp) + leaq gdt_page(%rdx), %rax + movq %rax, 2(%rsp) + lgdt (%rsp) + addq $16, %rsp /* set up data segments */ xorl %eax,%eax @@ -667,10 +672,6 @@ SYM_DATA_END(level1_fixmap_pgt) .data .align 16 -SYM_DATA(early_gdt_descr, .word GDT_ENTRIES*8-1) -SYM_DATA_LOCAL(early_gdt_descr_base, .quad INIT_PER_CPU_VAR(gdt_page)) - - .align 16 SYM_DATA(smpboot_control, .long 0) .align 16 |