On Fri, Apr 06, 2018 at 10:21:23PM +0100, Igor Druzhinin wrote: > Commit 99605175c (xen-pt: Fix PCI devices re-attach failed) introduced > a subtle bug. As soon as the guest switches off Bus Mastering on the > device it immediately causes all the BARs be unmapped due to the DMA > address space of the device being changed. This is undesired behavior > because the guest may try to communicate with the device after that > which triggers the following errors in the logs: > > [00:05.0] xen_pt_bar_read: Error: Should not read BAR through QEMU. > @0x0000000000000200 > [00:05.0] xen_pt_bar_write: Error: Should not write BAR through QEMU. > @0x0000000000000200 > > The issue that the original patch tried to workaround (uneven number of > region_add/del calls on device attach/detach) was fixed in later QEMU > versions.
Do you know when the issue was fixed? -- Anthony PERARD
