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| author | Philippe Mathieu-Daudé <philmd@redhat.com> | 2020-11-03 03:07:28 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2020-11-03 19:06:22 +0000 |
| commit | 3d87c2d9435a4c71d588a770a8a34382c1afa9c1 (patch) | |
| tree | d128561d80d1cb41e99e79aca60415c4476b7315 /util/vfio-helpers.c | |
| parent | a4bc212add9bd9d7a7baaa095f875d9212eb1fc9 (diff) | |
| download | focaccia-qemu-3d87c2d9435a4c71d588a770a8a34382c1afa9c1.tar.gz focaccia-qemu-3d87c2d9435a4c71d588a770a8a34382c1afa9c1.zip | |
util/vfio-helpers: Trace PCI I/O config accesses
We sometime get kernel panic with some devices on Aarch64 hosts. Alex Williamson suggests it might be broken PCIe root complex. Add trace event to record the latest I/O access before crashing. In case, assert our accesses are aligned. Reviewed-by: Fam Zheng <fam@euphon.net> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20201103020733.2303148-3-philmd@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Tested-by: Eric Auger <eric.auger@redhat.com>
Diffstat (limited to 'util/vfio-helpers.c')
| -rw-r--r-- | util/vfio-helpers.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c index 14a549510f..1d4efafcaa 100644 --- a/util/vfio-helpers.c +++ b/util/vfio-helpers.c @@ -227,6 +227,10 @@ static int qemu_vfio_pci_read_config(QEMUVFIOState *s, void *buf, { int ret; + trace_qemu_vfio_pci_read_config(buf, ofs, size, + s->config_region_info.offset, + s->config_region_info.size); + assert(QEMU_IS_ALIGNED(s->config_region_info.offset + ofs, size)); do { ret = pread(s->device, buf, size, s->config_region_info.offset + ofs); } while (ret == -1 && errno == EINTR); @@ -237,6 +241,10 @@ static int qemu_vfio_pci_write_config(QEMUVFIOState *s, void *buf, int size, int { int ret; + trace_qemu_vfio_pci_write_config(buf, ofs, size, + s->config_region_info.offset, + s->config_region_info.size); + assert(QEMU_IS_ALIGNED(s->config_region_info.offset + ofs, size)); do { ret = pwrite(s->device, buf, size, s->config_region_info.offset + ofs); } while (ret == -1 && errno == EINTR); |