[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen master] x86: don't allow Dom0 access to port 92
commit 9e2c146c38a74e6ced610599224ce216cae13874 Author: Jan Beulich <jbeulich@xxxxxxxx> AuthorDate: Thu Nov 2 10:44:11 2023 +0100 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Thu Nov 2 10:44:11 2023 +0100 x86: don't allow Dom0 access to port 92 Somewhat like port CF9 this may have a bit controlling the CPU's INIT# signal, and it also may have a bit involved in the driving of A20M#. Neither of these - just like CF9 - we want to allow Dom0 to drive. Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx> --- xen/arch/x86/dom0_build.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/xen/arch/x86/dom0_build.c b/xen/arch/x86/dom0_build.c index 5dc5872e38..c31afc734f 100644 --- a/xen/arch/x86/dom0_build.c +++ b/xen/arch/x86/dom0_build.c @@ -488,6 +488,10 @@ int __init dom0_setup_permissions(struct domain *d) rc |= ioports_deny_access(d, 0x40, 0x43); /* PIT Channel 2 / PC Speaker Control. */ rc |= ioports_deny_access(d, 0x61, 0x61); + + /* INIT# and alternative A20M# control. */ + rc |= ioports_deny_access(d, 0x92, 0x92); + /* ACPI PM Timer. */ if ( pmtmr_ioport ) rc |= ioports_deny_access(d, pmtmr_ioport, pmtmr_ioport + 3); -- generated by git-patchbot for /home/xen/git/xen.git#master
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