diff options
| -rw-r--r-- | hw/usb/hcd-ehci.c | 26 | ||||
| -rw-r--r-- | trace-events | 1 |
2 files changed, 21 insertions, 6 deletions
diff --git a/hw/usb/hcd-ehci.c b/hw/usb/hcd-ehci.c index 23221d0c01..4564615e05 100644 --- a/hw/usb/hcd-ehci.c +++ b/hw/usb/hcd-ehci.c @@ -716,6 +716,12 @@ static void ehci_trace_sitd(EHCIState *s, target_phys_addr_t addr, (bool)(sitd->results & SITD_RESULTS_ACTIVE)); } +static void ehci_trace_guest_bug(EHCIState *s, const char *message) +{ + trace_usb_ehci_guest_bug(message); + fprintf(stderr, "ehci warning: %s\n", message); +} + static inline bool ehci_enabled(EHCIState *s) { return s->usbcmd & USBCMD_RUNSTOP; @@ -785,27 +791,33 @@ static EHCIQueue *ehci_alloc_queue(EHCIState *ehci, uint32_t addr, int async) return q; } -static void ehci_cancel_queue(EHCIQueue *q) +static int ehci_cancel_queue(EHCIQueue *q) { EHCIPacket *p; + int packets = 0; p = QTAILQ_FIRST(&q->packets); if (p == NULL) { - return; + return 0; } trace_usb_ehci_queue_action(q, "cancel"); do { ehci_free_packet(p); + packets++; } while ((p = QTAILQ_FIRST(&q->packets)) != NULL); + return packets; } -static void ehci_reset_queue(EHCIQueue *q) +static int ehci_reset_queue(EHCIQueue *q) { + int packets; + trace_usb_ehci_queue_action(q, "reset"); - ehci_cancel_queue(q); + packets = ehci_cancel_queue(q); q->dev = NULL; q->qtdaddr = 0; + return packets; } static void ehci_free_queue(EHCIQueue *q) @@ -1817,7 +1829,9 @@ static EHCIQueue *ehci_state_fetchqh(EHCIState *ehci, int async) (memcmp(&qh.current_qtd, &q->qh.current_qtd, 9 * sizeof(uint32_t)) != 0) || (q->dev != NULL && q->dev->addr != devaddr)) { - ehci_reset_queue(q); + if (ehci_reset_queue(q) > 0) { + ehci_trace_guest_bug(ehci, "guest updated active QH"); + } p = NULL; } q->qh = qh; @@ -1979,8 +1993,8 @@ static int ehci_state_fetchqtd(EHCIQueue *q) (!NLPTR_TBIT(p->qtd.next) && (p->qtd.next != qtd.next)) || (!NLPTR_TBIT(p->qtd.altnext) && (p->qtd.altnext != qtd.altnext)) || p->qtd.bufptr[0] != qtd.bufptr[0]) { - /* guest bug: guest updated active QH or qTD underneath us */ ehci_cancel_queue(q); + ehci_trace_guest_bug(q->ehci, "guest updated active QH or qTD"); p = NULL; } else { p->qtd = qtd; diff --git a/trace-events b/trace-events index 8fcbc50f92..5112a474e0 100644 --- a/trace-events +++ b/trace-events @@ -263,6 +263,7 @@ usb_ehci_data(int rw, uint32_t cpage, uint32_t offset, uint32_t addr, uint32_t l usb_ehci_queue_action(void *q, const char *action) "q %p: %s" usb_ehci_packet_action(void *q, void *p, const char *action) "q %p p %p: %s" usb_ehci_irq(uint32_t level, uint32_t frindex, uint32_t sts, uint32_t mask) "level %d, frindex 0x%04x, sts 0x%x, mask 0x%x" +usb_ehci_guest_bug(const char *reason) "%s" # hw/usb/hcd-uhci.c usb_uhci_reset(void) "=== RESET ===" |