diff options
| author | Fuad Tabba <tabba@google.com> | 2026-01-09 08:22:15 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2026-01-15 13:39:53 +0000 |
| commit | dd0c5d04d13cae8ff2694ef83d1ae5804d6d9798 (patch) | |
| tree | de63ccb9f5099f7e9d07579fab8c63e054e8ea3e /tools/testing/selftests/kvm | |
| parent | 7e03d07d03a486c66d5c084c7185b1bef29049e9 (diff) | |
KVM: arm64: selftests: Fix incorrect rounding in page_align()
The implementation of `page_align()` in `processor.c` calculates
alignment incorrectly for values that are already aligned. Specifically,
`(v + vm->page_size) & ~(vm->page_size - 1)` aligns to the *next* page
boundary even if `v` is already page-aligned, potentially wasting a page
of memory.
Fix the calculation to use standard alignment logic: `(v + vm->page_size
- 1) & ~(vm->page_size - 1)`.
Fixes: 7a6629ef746d ("kvm: selftests: add virt mem support for aarch64")
Reviewed-by: Andrew Jones <andrew.jones@linux.dev>
Signed-off-by: Fuad Tabba <tabba@google.com>
Link: https://patch.msgid.link/20260109082218.3236580-3-tabba@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'tools/testing/selftests/kvm')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/arm64/processor.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/kvm/lib/arm64/processor.c b/tools/testing/selftests/kvm/lib/arm64/processor.c index 5b379da8cb90..607a4e462984 100644 --- a/tools/testing/selftests/kvm/lib/arm64/processor.c +++ b/tools/testing/selftests/kvm/lib/arm64/processor.c @@ -23,7 +23,7 @@ static vm_vaddr_t exception_handlers; static uint64_t page_align(struct kvm_vm *vm, uint64_t v) { - return (v + vm->page_size) & ~(vm->page_size - 1); + return (v + vm->page_size - 1) & ~(vm->page_size - 1); } static uint64_t pgd_index(struct kvm_vm *vm, vm_vaddr_t gva) |