Hi, this is version two of the patch series which implements allocation of new memory regions at runtime for EFI-based systems. The goal is to be able to allocate big chunks of memory, which is currently not possible given that GRUB only allocates a fixed amount of bytes.
This version has been rebased on top of the current master. The only
change compared to v1 is a the patch 3/4, which changes the signature of
`add_memory_regions ()` to pass up any errors instead of raising a fatal
error.
I've tested this change with my Argon2 support for LUKS2. Due to Argon2
being memory hard, it requires us to allocate a consecutive 1GB chunk in
which the resulting key will be computed.
Patrick
Patrick Steinhardt (4):
mm: Allow dynamically requesting additional memory regions
efi: mm: Extract function to add memory regions
efi: mm: Pass up errors from `add_memory_regions ()`
efi: mm: Implement runtime addition of pages
grub-core/kern/efi/mm.c | 83 +++++++++++++++++++----------------------
grub-core/kern/mm.c | 11 +++++-
include/grub/mm.h | 13 +++++++
3 files changed, 61 insertions(+), 46 deletions(-)
Range-diff against v1:
1: ba8127734 = 1: cf709a8a1 mm: Allow dynamically requesting additional
memory regions
2: b18710852 = 2: 2a9ccee9e efi: mm: Extract function to add memory regions
-: --------- > 3: ff7e5be9f efi: mm: Pass up errors from `add_memory_regions
()`
3: f29c60962 ! 4: a27f5b047 efi: mm: Implement runtime addition of pages
@@ Commit message
Signed-off-by: Patrick Steinhardt <p...@pks.im>
## grub-core/kern/efi/mm.c ##
-@@ grub-core/kern/efi/mm.c: static void
+@@ grub-core/kern/efi/mm.c: static grub_err_t
add_memory_regions (grub_efi_memory_descriptor_t *memory_map,
grub_efi_uintn_t desc_size,
grub_efi_memory_descriptor_t *memory_map_end,
@@ grub-core/kern/efi/mm.c: print_memory_map (grub_efi_memory_descriptor_t
*memory_
grub_efi_memory_descriptor_t *memory_map_end;
@@ grub-core/kern/efi/mm.c: grub_efi_mm_add_regions (grub_efi_uint64_t
required_bytes)
/* Allocate memory regions for GRUB's memory management. */
- add_memory_regions (filtered_memory_map, desc_size,
- filtered_memory_map_end,
-- BYTES_TO_PAGES (required_bytes));
-+ BYTES_TO_PAGES (required_bytes),
-+ flags & GRUB_MM_REGION_CONSECUTIVE);
+ err = add_memory_regions (filtered_memory_map, desc_size,
+ filtered_memory_map_end,
+- BYTES_TO_PAGES (required_bytes));
++ BYTES_TO_PAGES (required_bytes),
++ flags & GRUB_MM_REGION_CONSECUTIVE);
+ if (err != GRUB_ERR_NONE)
+ return err;
- #if 0
- /* For debug. */
@@ grub-core/kern/efi/mm.c: grub_efi_mm_add_regions (grub_efi_uint64_t
required_bytes)
void
grub_efi_mm_init (void)
--
2.32.0
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