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| author |   Jan Beulich <jbeulich@suse.com> | 2021-09-30 14:37:19 +0200 |
|---|---|---|
| committer |   Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2021-11-02 07:45:43 -0500 |
| commit | 9a58b352e9e8a8c897acf6aae5cacd7d481965f9 (patch) | |
| tree | 3dcf7374de6f84ae997c148bcc2c13c408a48057 /drivers/xen/xen-pciback | |
| parent | xen/x86: there's no highmem anymore in PV mode (diff) | |
| download | linux-dev-9a58b352e9e8a8c897acf6aae5cacd7d481965f9.tar.xz linux-dev-9a58b352e9e8a8c897acf6aae5cacd7d481965f9.zip | |
xen/x86: restrict PV Dom0 identity mapping
When moving away RAM pages, there having been a mapping of those is not
a proper indication that instead MMIO should be mapped there. At the
point in time this effectively covers the low megabyte only. Mapping of
that is, however, the job of init_mem_mapping(). Comparing the two one
can also spot that we've been wrongly (or at least inconsistently) using
PAGE_KERNEL_IO here.
Simply zap any such mappings instead.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/038b8c02-3621-d66a-63ae-982ccf67ae88@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'drivers/xen/xen-pciback')
0 files changed, 0 insertions, 0 deletions