diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2023-12-13 11:40:27 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2024-02-09 13:56:11 +0300 |
| commit | b730b0f2b1fcfbdaed816152cc71993fd708aa11 (patch) | |
| tree | 071b31e37f70c215f569ba94d0aa960f4758ce8a /arch/arm64/mm/ptdump.c | |
| parent | 031e011d8b22346a6513c7879cbecd7105b4c11d (diff) | |
| download | linux-b730b0f2b1fcfbdaed816152cc71993fd708aa11.tar.xz | |
arm64: mm: Move fixmap region above vmemmap region
Move the fixmap region above the vmemmap region, so that the start of
the vmemmap delineates the end of the region available for vmalloc and
vmap allocations and the randomized placement of the kernel and modules.
In a subsequent patch, we will take advantage of this to reclaim most of
the vmemmap area when running a 52-bit VA capable build with 52-bit
virtual addressing disabled at runtime.
Note that the existing guard region of 256 MiB covers the fixmap and PCI
I/O regions as well, so we can reduce it 8 MiB, which is what we use in
other places too.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231213084024.2367360-11-ardb@google.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Diffstat (limited to 'arch/arm64/mm/ptdump.c')
| -rw-r--r-- | arch/arm64/mm/ptdump.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm64/mm/ptdump.c b/arch/arm64/mm/ptdump.c index 46acb2a24da0..a929b5a321db 100644 --- a/arch/arm64/mm/ptdump.c +++ b/arch/arm64/mm/ptdump.c @@ -45,12 +45,12 @@ static struct addr_marker address_markers[] = { { MODULES_END, "Modules end" }, { VMALLOC_START, "vmalloc() area" }, { VMALLOC_END, "vmalloc() end" }, - { FIXADDR_TOT_START, "Fixmap start" }, - { FIXADDR_TOP, "Fixmap end" }, { VMEMMAP_START, "vmemmap start" }, { VMEMMAP_END, "vmemmap end" }, { PCI_IO_START, "PCI I/O start" }, { PCI_IO_END, "PCI I/O end" }, + { FIXADDR_TOT_START, "Fixmap start" }, + { FIXADDR_TOP, "Fixmap end" }, { -1, NULL }, }; |