diff options
| author | Jason Wang <jasowang@redhat.com> | 2021-04-06 12:03:30 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-04-06 07:11:36 -0400 |
| commit | d83f46d189a26fa32434139954d264326f199a45 (patch) | |
| tree | 1292bb94a1a503ab34af1b50356f01f41751c862 /hw/core/machine.c | |
| parent | 90a66f48471975fd46f1caab1574679f0a0ef74b (diff) | |
virtio-pci: compat page aligned ATS
Commit 4c70875372b8 ("pci: advertise a page aligned ATS") advertises
the page aligned via ATS capability (RO) to unbrek recent Linux IOMMU
drivers since 5.2. But it forgot the compat the capability which
breaks the migration from old machine type:
(qemu) qemu-kvm: get_pci_config_device: Bad config data: i=0x104 read:
0 device: 20 cmask: ff wmask: 0 w1cmask:0
This patch introduces a new parameter "x-ats-page-aligned" for
virtio-pci device and turns it on for machine type which is newer than
5.1.
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: qemu-stable@nongnu.org
Fixes: 4c70875372b8 ("pci: advertise a page aligned ATS")
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20210406040330.11306-1-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/core/machine.c')
| -rw-r--r-- | hw/core/machine.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/core/machine.c b/hw/core/machine.c index 9935c6ddd5..a50f2d5f0a 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -53,6 +53,7 @@ GlobalProperty hw_compat_5_1[] = { { "nvme", "use-intel-id", "on"}, { "pvpanic", "events", "1"}, /* PVPANIC_PANICKED */ { "pl011", "migrate-clk", "off" }, + { "virtio-pci", "x-ats-page-aligned", "off"}, }; const size_t hw_compat_5_1_len = G_N_ELEMENTS(hw_compat_5_1); |