memtest86plus

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Martin Whitaker 3eccb818c9 Disable memory write protection after EFI setup.

A recent change (commit e41655885) to the Fedora implementation of the
GRUB "linux" command for EFI boot means it now attempts to make the
loaded code section read-only, using the EFI_MEMORY_ATTRIBUTE_PROTOCOL.
In our image the code section contains the combined .text and .data
sections. Our startup code needs to write to the .data section before
we can switch to our own page descriptor table, so globally disable
write protection as soon as we return from efisetup().

Our page descriptor table makes all pages writable (we need to be able
to write to memory to test it), so there's no need to reenable the
write protection once we've made the switch.

I have no UEFI firmware that implements the EFI_MEMORY_ATTRIBUTE_PROTOCOL,
so this fix is not yet proven.

2025-12-01 17:18:47 +00:00

loongarch

loongarch: Add 64-bit PCIe memory space mapping and change the stable timer as the main timer (#450 )

2024-10-24 19:28:00 +02:00

x86

Disable memory write protection after EFI setup.

2025-12-01 17:18:47 +00:00

boot.h

Extend the header size to 4KB align the code segment in the image file.

2025-11-28 11:03:48 +00:00

bootparams.h

Allow use on headless EFI systems. (#242 )