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xhci: apply limits to loops

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Limits should be big enough that normal guest should not hit it.
Add a tracepoint to log them, just in case.  Also, while being
at it, log the existing link trb limit too.

Reported-by: 李强 <liqiang6-s@360.cn>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 1486383669-6421-1-git-send-email-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2017-02-06 13:21:09 +01:00
parent 95ed56939e
commit f89b60f6e5
2 changed files with 15 additions and 1 deletions
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1
hw/usb/trace-events
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@ -174,6 +174,7 @@ usb_xhci_xfer_retry(void *xfer) "%p"
usb_xhci_xfer_success(void *xfer, uint32_t bytes) "%p: len %d"
usb_xhci_xfer_error(void *xfer, uint32_t ret) "%p: ret %d"
usb_xhci_unimplemented(const char *item, int nr) "%s (0x%x)"
usb_xhci_enforced_limit(const char *item) "%s"
# hw/usb/desc.c
usb_desc_device(int addr, int len, int ret) "dev %d query device, len %d, ret %d"