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Re: [PATCH] VT-d: check bus_to_context_maddr()'s return value


  • To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <amc96@xxxxxxxx>
  • Date: Mon, 13 Oct 2025 14:18:55 +0100
  • Autocrypt: addr=amc96@xxxxxxxx; keydata= xsFNBFLhNn8BEADVhE+Hb8i0GV6mihnnr/uiQQdPF8kUoFzCOPXkf7jQ5sLYeJa0cQi6Penp VtiFYznTairnVsN5J+ujSTIb+OlMSJUWV4opS7WVNnxHbFTPYZVQ3erv7NKc2iVizCRZ2Kxn srM1oPXWRic8BIAdYOKOloF2300SL/bIpeD+x7h3w9B/qez7nOin5NzkxgFoaUeIal12pXSR Q354FKFoy6Vh96gc4VRqte3jw8mPuJQpfws+Pb+swvSf/i1q1+1I4jsRQQh2m6OTADHIqg2E ofTYAEh7R5HfPx0EXoEDMdRjOeKn8+vvkAwhviWXTHlG3R1QkbE5M/oywnZ83udJmi+lxjJ5 YhQ5IzomvJ16H0Bq+TLyVLO/VRksp1VR9HxCzItLNCS8PdpYYz5TC204ViycobYU65WMpzWe LFAGn8jSS25XIpqv0Y9k87dLbctKKA14Ifw2kq5OIVu2FuX+3i446JOa2vpCI9GcjCzi3oHV e00bzYiHMIl0FICrNJU0Kjho8pdo0m2uxkn6SYEpogAy9pnatUlO+erL4LqFUO7GXSdBRbw5 gNt25XTLdSFuZtMxkY3tq8MFss5QnjhehCVPEpE6y9ZjI4XB8ad1G4oBHVGK5LMsvg22PfMJ ISWFSHoF/B5+lHkCKWkFxZ0gZn33ju5n6/FOdEx4B8cMJt+cWwARAQABzR5BbmRyZXcgQ29v cGVyIDxhbWM5NkBzcmNmLm5ldD7CwY4EEwEIADgWIQTPNUlbfqb3Dqd9IXZlw/kGpdefoAUC YVGxuQIbAwULCQgHAwUVCgkICwUWAgMBAAIeAQIXgAAKCRBlw/kGpdefoO0aD/9VN28mNPs9 3Au2pQyHEYHcVLxTRlHoTHY/ZIws3ue7AgWN73CXhCQnFmqzHOSldY4abD4KyTacAUXqeAOp XNUGrCj7yaI7H4Bj27OO6pLEpuPXHJ+12E/mHVRH5lwYzFBRghW/H/HxW99pn8qk3yb9nPR5 s8tZHIeP4tSUPt2Uu/HR2kyMA1MeVyVRsnH6WDOgjyj76Kx296LRmsbzPvJT9w8IvM2avh7i fZu/LNad21Om5Nx3raB3CT/0lj7tODt1yEfTqUdN+DOalwbbKFzXUyhZy1VzAN/lad6Vy1Il mArNoZkmDQfi4mkG3qAkwFipjny+fBxNA8W8sHUjMMwNj4cH4Qavgqdyw7nuwXaXVEvunst2 SehwkPQeNohve18b+HBPk5isNhr8rM71zBQH/HECgyusDLTk3Xt0fmo4sOvyXPeUnqz1YdSq IoVOcCJZxFlnkGHTpOBegmXJWAdteYxzVU5fa3xhEPmtrjAnAqpfT3kPPM9nyi+ZKBl+1Oe4 WxvH8OYo3lIh+8mhiYMhumnDn9YChFKzdjAIUMOg3pBMYZNzTVaOGaLfEg97l5ojUQH+Bivk 2EpgpYtoIG/zdDfrwG2ezYcy7rxjE1a1ph3tWYX2ojaoFE71ic4HHWUHDq3KN/nYxrTqYCMY ddkzh8N2KKP2ktfpHp4tPxUNps7BTQRS4TZ/ARAAkgqudHsp+hd82UVkvgnlqZjzz2vyrYfz 7bkPtXaGb9H4Rfo7mQsEQavEBdWWjbga6eMnDqtu+FC+qeTGYebToxEyp2lKDSoAsvt8w82t IlP/EbmRbDVn7bhjBlfRcFjVYw8uVDPptT0TV47vpoCVkTwcyb6OltJrvg/QzV9f07DJswud a1JH3/qvYu0pvjPnYvCq4NsqY2XSdAJ02HrdYPFtNyPEntu1n1KK+gJrstjtw7KsZ4ygXYrs m/oCBiVW/OgUg/XIlGErkrxe4vQvJyVwg6YH653YTX5hLLUEL1NS4TCo47RP+wi6y+TnuAL3 6UtK/uFyEuPywwrDVcC4cIFhYSfsO0BumEI65yu7a8aHbGfq2lW251UcoU48Z27ZUUZd2Dr6 O/n8poQHbaTd6bJJSjzGGHZVbRP9UQ3lkmkmc0+XCHmj5WhwNNYjgbbmML7y0fsJT5RgvefA IFfHBg7fTY/ikBEimoUsTEQz+N4hbKwo1hULfVxDJStE4sbPhjbsPCrlXf6W9CxSyQ0qmZ2b XsLQYRj2xqd1bpA+1o1j2N4/au1R/uSiUFjewJdT/LX1EklKDcQwpk06Af/N7VZtSfEJeRV0 4unbsKVXWZAkuAJyDDKN99ziC0Wz5kcPyVD1HNf8bgaqGDzrv3TfYjwqayRFcMf7xJaL9xXe dMcAEQEAAcLBXwQYAQgACQUCUuE2fwIbDAAKCRBlw/kGpdefoG4XEACD1Qf/er8EA7g23HMx YWd3FXHThrVQHgiGdk5Yh632vjOm9L4sd/GCEACVQKjsu98e8o3ysitFlznEns5EAAXEbITr gKWXDDUWGYxdpnjj2u+GkVdsOAGk0kxczX6s+VRBhpbBI2PWnOsRJgU2n10PZ3mZD4Xu9kU2 IXYmuW+e5KCAvTArRUdCrAtIa1k01sPipPPw6dfxx2e5asy21YOytzxuWFfJTGnVxZZSCyLU O83sh6OZhJkkb9rxL9wPmpN/t2IPaEKoAc0FTQZS36wAMOXkBh24PQ9gaLJvfPKpNzGD8XWR 5HHF0NLIJhgg4ZlEXQ2fVp3XrtocHqhu4UZR4koCijgB8sB7Tb0GCpwK+C4UePdFLfhKyRdS XuvY3AHJd4CP4JzW0Bzq/WXY3XMOzUTYApGQpnUpdOmuQSfpV9MQO+/jo7r6yPbxT7CwRS5d cQPzUiuHLK9invjREdh84qycnx0/6dDroYhp0DFv4udxuAvt1h4wGwTPRQZerSm4xaYegEFu syhbZrI0U9tJB8WrhBLXDiYlyJT6zOV2yZFuW47VrLsjYnHwn27hmxTC/7tvG3euCklmkn9S l9IAKFu29RSod5bD8kMSCYsTqtTfT6W4A3qHGvIDta3ptLYpIAOD2sY3GYq2nf3Bbzx81wZK 14JdDDHUX2Rs6+ahAA==
  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • Delivery-date: Mon, 13 Oct 2025 13:19:22 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 07/08/2025 3:10 pm, Jan Beulich wrote:
> The function returning zero is an error indication; we shouldn't try to
> map MFN 0 and then treat that page as a context table.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>



 


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