On aarch64 hosts with 64K pages, the platform bus MMIO allocator can
allocate the 1KB "tpm-ppi" region at offsets not aligned to the host
page size, triggering a noisy VFIO IOMMU warning at VM startup:
vfio_listener_valid_section received unaligned region tpm-ppi
iova=0xc005000 offset_within_region=0x0
qemu_real_host_page_size=0x10000
Commit 851d6d1a0ff2 ("vfio/common: remove spurious tpm-crb-cmd
misalignment warning") suppressed this for TPM CRB devices via a
TPM_IS_CRB(owner) check. However, this misses "tpm-ppi" regions owned
by other TPM types like SysBus/ISA tpm-tis devices.
Avoid enumerating every TPM device type by matching the "tpm-ppi"
memory region name directly in vfio_known_safe_misalignment().
Signed-off-by: Cedric Le Goater <[email protected]>
---
hw/vfio/listener.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/hw/vfio/listener.c b/hw/vfio/listener.c
index
c19600e980a8d02217b5d9df4aca8f879ab2c5d5..c76ba285ddb7ef4f93bb081e67de47b3aecbe212
100644
--- a/hw/vfio/listener.c
+++ b/hw/vfio/listener.c
@@ -355,8 +355,10 @@ static void
vfio_ram_discard_unregister_listener(VFIOContainer *bcontainer,
static bool vfio_known_safe_misalignment(MemoryRegionSection *section)
{
MemoryRegion *mr = section->mr;
+ const char *name = memory_region_name(mr);
- if (!TPM_IS_CRB(mr->owner)) {
+ if (!TPM_IS_CRB(mr->owner) &&
+ !(name && strcmp(name, "tpm-ppi") == 0)) {
return false;
}
--
2.54.0
