Messages in this thread | | | Subject | Re: [Xen-devel] [PATCH v2] x86/xen: fix pv boot | From | Andrew Cooper <> | Date | Wed, 7 Nov 2018 17:36:10 +0000 |
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On 07/11/18 17:01, Juergen Gross wrote: > Commit 9da3f2b7405440 ("x86/fault: BUG() when uaccess helpers fault on > kernel addresses") introduced a regression for booting Xen PV guests. > > Xen PV guests are using __put_user() and __get_user() for accessing the > p2m map (physical to machine frame number map) as accesses might fail > in case of not populated areas of the map. > > With above commit using __put_user() and __get_user() for accessing > kernel pages is no longer valid. So replace the Xen hack by adding > appropriate p2m access functions using the default fixup handler. > > Fixes: 9da3f2b7405440 ("x86/fault: BUG() when uaccess helpers fault on kernel addresses") > Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
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