| commit | f68453237b9c97f7d1948236a359524c45d7e2d8 | |
| author | Philippe Mathieu-Daudé <philmd@redhat.com> | |
| Tue, 22 Sep 2020 08:38:17 +0000 (22 10:38 +0200) | ||
| committer | Stefan Hajnoczi <stefanha@redhat.com> | |
| Mon, 5 Oct 2020 08:35:52 +0000 (5 09:35 +0100) | ||
| tree | ed1db47dfd9a2c48942ea2eb68b39a2f1dea1b2a | treesnapshot (tar.gz zip) |
| parent | b02c01a513a17e03e2245feff19b3dcc8c408859 | commitdiff |
block/nvme: Map doorbells pages write-only
Per the datasheet sections 3.1.13/3.1.14:
"The host should not read the doorbell registers."
As we don't need read access, map the doorbells with write-only
permission. We keep a reference to this mapped address in the
BDRVNVMeState structure.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200922083821.578519-3-philmd@redhat.com>
Per the datasheet sections 3.1.13/3.1.14:
"The host should not read the doorbell registers."
As we don't need read access, map the doorbells with write-only
permission. We keep a reference to this mapped address in the
BDRVNVMeState structure.
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20200922083821.578519-3-philmd@redhat.com>
| block/nvme.c | diffblobblamehistory |