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1445f6e1 |
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19-Dec-2023 |
Vegard Nossum <vegard.nossum@oracle.com> |
x86/asm: Replace magic numbers in GDT descriptors, script-generated change Actually replace the numeric values by the new symbolic values. I used this to find all the existing users of the GDT_ENTRY*() macros: $ git grep -P 'GDT_ENTRY(_INIT)?\(' Some of the lines will exceed 80 characters, but some of them will be shorter again in the next couple of patches. Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Link: https://lore.kernel.org/r/20231219151200.2878271-4-vegard.nossum@oracle.com
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cb1c9e02 |
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07-Aug-2023 |
Ard Biesheuvel <ardb@kernel.org> |
x86/efistub: Perform 4/5 level paging switch from the stub In preparation for updating the EFI stub boot flow to avoid the bare metal decompressor code altogether, implement the support code for switching between 4 and 5 levels of paging before jumping to the kernel proper. Reuse the newly refactored trampoline that the bare metal decompressor uses, but relies on EFI APIs to allocate 32-bit addressable memory and remap it with the appropriate permissions. Given that the bare metal decompressor will no longer call into the trampoline if the number of paging levels is already set correctly, it is no longer needed to remove NX restrictions from the memory range where this trampoline may end up. Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Link: https://lore.kernel.org/r/20230807162720.545787-17-ardb@kernel.org
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