From 3d87c2d9435a4c71d588a770a8a34382c1afa9c1 Mon Sep 17 00:00:00 2001 From: Philippe Mathieu-Daudé Date: Tue, 3 Nov 2020 03:07:28 +0100 Subject: 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 Reviewed-by: Stefan Hajnoczi Signed-off-by: Philippe Mathieu-Daudé Message-id: 20201103020733.2303148-3-philmd@redhat.com Signed-off-by: Stefan Hajnoczi Tested-by: Eric Auger --- util/trace-events | 2 ++ 1 file changed, 2 insertions(+) (limited to 'util/trace-events') diff --git a/util/trace-events b/util/trace-events index 24c31803b0..8d3615e717 100644 --- a/util/trace-events +++ b/util/trace-events @@ -85,3 +85,5 @@ qemu_vfio_new_mapping(void *s, void *host, size_t size, int index, uint64_t iova qemu_vfio_do_mapping(void *s, void *host, size_t size, uint64_t iova) "s %p host %p size 0x%zx iova 0x%"PRIx64 qemu_vfio_dma_map(void *s, void *host, size_t size, bool temporary, uint64_t *iova) "s %p host %p size 0x%zx temporary %d iova %p" qemu_vfio_dma_unmap(void *s, void *host) "s %p host %p" +qemu_vfio_pci_read_config(void *buf, int ofs, int size, uint64_t region_ofs, uint64_t region_size) "read cfg ptr %p ofs 0x%x size 0x%x (region addr 0x%"PRIx64" size 0x%"PRIx64")" +qemu_vfio_pci_write_config(void *buf, int ofs, int size, uint64_t region_ofs, uint64_t region_size) "write cfg ptr %p ofs 0x%x size 0x%x (region addr 0x%"PRIx64" size 0x%"PRIx64")" -- cgit v1.2.3-55-g7522