Re: [PATCH v3 31/75] x86/head/64: Install boot GDT
From: Borislav Petkov <bp@alien8.de>
Date: 2020-05-18 08:23:24
Also in:
kvm, lkml
On Tue, Apr 28, 2020 at 05:16:41PM +0200, Joerg Roedel wrote:
quoted hunk ↗ jump to hunk
@@ -480,6 +500,22 @@ SYM_DATA_LOCAL(early_gdt_descr_base, .quad INIT_PER_CPU_VAR(gdt_page)) SYM_DATA(phys_base, .quad 0x0) EXPORT_SYMBOL(phys_base) +/* Boot GDT used when kernel addresses are not mapped yet */ +SYM_DATA_LOCAL(boot_gdt_descr, .word boot_gdt_end - boot_gdt) +SYM_DATA_LOCAL(boot_gdt_base, .quad 0) +SYM_DATA_START(boot_gdt) + .quad 0 + .quad 0x00cf9a000000ffff /* __KERNEL32_CS */ + .quad 0x00af9a000000ffff /* __KERNEL_CS */ + .quad 0x00cf92000000ffff /* __KERNEL_DS */ + .quad 0 /* __USER32_CS - unused */ + .quad 0 /* __USER_DS - unused */ + .quad 0 /* __USER_CS - unused */ + .quad 0 /* unused */ + .quad 0x0080890000000000 /* TSS descriptor */ + .quad 0x0000000000000000 /* TSS continued */
Any chance you could use macros ala GDT_ENTRY_INIT() for those instead
of the naked values?
--
Regards/Gruss,
Boris.
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