mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-27 14:14:24 +08:00
b29f377119
- Continuing work by Ard Biesheuvel to improve the x86 early startup code,
with the long-term goal to make it position independent:
- Get rid of early accesses to global objects, either by moving them
to the stack, deferring the access until later, or dropping the
globals entirely.
- Move all code that runs early via the 1:1 mapping into .head.text,
and move code that does not out of it, so that build time checks can
be added later to ensure that no inadvertent absolute references were
emitted into code that does not tolerate them.
- Remove fixup_pointer() and occurrences of __pa_symbol(), which rely
on the compiler emitting absolute references, which is not guaranteed.
- Improve the early console code.
- Add early console message about ignored NMIs, so that users are at least
warned about their existence - even if we cannot do anything about them.
- Improve the kexec code's kernel load address handling.
- Enable more X86S (simplified x86) bits.
- Simplify early boot GDT handling
- Micro-optimize the boot code a bit
- Misc cleanups.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
-----BEGIN PGP SIGNATURE-----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=zvw3
-----END PGP SIGNATURE-----
Merge tag 'x86-boot-2024-03-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 boot updates from Ingo Molnar:
- Continuing work by Ard Biesheuvel to improve the x86 early startup
code, with the long-term goal to make it position independent:
- Get rid of early accesses to global objects, either by moving
them to the stack, deferring the access until later, or dropping
the globals entirely
- Move all code that runs early via the 1:1 mapping into
.head.text, and move code that does not out of it, so that build
time checks can be added later to ensure that no inadvertent
absolute references were emitted into code that does not
tolerate them
- Remove fixup_pointer() and occurrences of __pa_symbol(), which
rely on the compiler emitting absolute references, which is not
guaranteed
- Improve the early console code
- Add early console message about ignored NMIs, so that users are at
least warned about their existence - even if we cannot do anything
about them
- Improve the kexec code's kernel load address handling
- Enable more X86S (simplified x86) bits
- Simplify early boot GDT handling
- Micro-optimize the boot code a bit
- Misc cleanups
* tag 'x86-boot-2024-03-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
x86/sev: Move early startup code into .head.text section
x86/sme: Move early SME kernel encryption handling into .head.text
x86/boot: Move mem_encrypt= parsing to the decompressor
efi/libstub: Add generic support for parsing mem_encrypt=
x86/startup_64: Simplify virtual switch on primary boot
x86/startup_64: Simplify calculation of initial page table address
x86/startup_64: Defer assignment of 5-level paging global variables
x86/startup_64: Simplify CR4 handling in startup code
x86/boot: Use 32-bit XOR to clear registers
efi/x86: Set the PE/COFF header's NX compat flag unconditionally
x86/boot/64: Load the final kernel GDT during early boot directly, remove startup_gdt[]
x86/boot/64: Use RIP_REL_REF() to access early_top_pgt[]
x86/boot/64: Use RIP_REL_REF() to access early page tables
x86/boot/64: Use RIP_REL_REF() to access '__supported_pte_mask'
x86/boot/64: Use RIP_REL_REF() to access early_dynamic_pgts[]
x86/boot/64: Use RIP_REL_REF() to assign 'phys_base'
x86/boot/64: Simplify global variable accesses in GDT/IDT programming
x86/trampoline: Bypass compat mode in trampoline_start64() if not needed
kexec: Allocate kernel above bzImage's pref_address
x86/boot: Add a message about ignored early NMIs
...
|
||
|---|---|---|
| .. | ||
| boot | ||
| coco | ||
| configs | ||
| crypto | ||
| entry | ||
| events | ||
| hyperv | ||
| ia32 | ||
| include | ||
| kernel | ||
| kvm | ||
| lib | ||
| math-emu | ||
| mm | ||
| net | ||
| pci | ||
| platform | ||
| power | ||
| purgatory | ||
| ras | ||
| realmode | ||
| tools | ||
| um | ||
| video | ||
| virt | ||
| xen | ||
| .gitignore | ||
| Kbuild | ||
| Kconfig | ||
| Kconfig.assembler | ||
| Kconfig.cpu | ||
| Kconfig.debug | ||
| Makefile | ||
| Makefile_32.cpu | ||
| Makefile.postlink | ||
| Makefile.um | ||