[kvm-unit-tests,0/3] arm/arm64: mmu cleanups and fixes

Message

Alexandru Elisei Oct. 6, 2022, 11:12 a.m. UTC

I was writing a quick test when I noticed that arm's implementation of
__virt_to_phys(), which ends up calling virt_to_pte_phys(), doesn't handle
block mappings and returns a bogus value.

When fixing that, I realized that lib/vmalloc confuses the return value for
virt_to_pte_phys(), which is harmless, but still wrong.

I also got confused about mmu_get_pte() and get_pte(), so I (hopefully)
improved that by renaming mmu_get_pte() to follow_pte().

Tested on rockpro64: arm64, 4k and 64k pages, with qemu and kvmtool; arm,
with qemu and kvmtool. And on an odroid-c4: arm64, 4k, 16k and 64k pages
with qemu and kvmtool; arm, with qemu and kvmtool.

Alexandru Elisei (3):
  lib/vmalloc: Treat virt_to_pte_phys() as returning a physical address
  arm/arm64: mmu: Teach virt_to_pte_phys() about block descriptors
  arm/arm64: mmu: Rename mmu_get_pte() -> follow_pte()

 lib/arm/asm/mmu-api.h |  2 +-
 lib/arm/mmu.c         | 88 +++++++++++++++++++++++++------------------
 lib/vmalloc.c         |  4 +-
 3 files changed, 55 insertions(+), 39 deletions(-)