KVM: arm64: Fix bpages backing allocation size in hyp_trace

hyp_trace_buffer_alloc_bpages_backing() computes nr_bpages as
(PAGE_ALIGN(size) / PAGE_SIZE) + 1, whereas trace_remote_alloc_buffer()
takes into account the buffer page header.

Align the bpages backing allocation by using
__calc_nr_pages_ring_buffer_desc(). There's no need to validate
nr_bpages again, it has been before with trace_buffer_desc_size().

Fixes: 3aed038aac8d ("KVM: arm64: Add trace remote for the nVHE/pKVM hyp")
Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>
Tested-by: Fuad Tabba <fuad.tabba@linux.dev>
Link: https://patch.msgid.link/20261008104212.3134550-3-vdonnefort@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>

0 files changed, 0 insertions, 0 deletions