| commit | cd1bb88624164ecf3055f21908751c33dbf759b3 | |
| author | Sepherosa Ziehau <sephe@dragonflybsd.org> | |
| Mon, 23 Apr 2018 14:15:44 +0000 (23 22:15 +0800) | ||
| committer | Sepherosa Ziehau <sephe@dragonflybsd.org> | |
| Mon, 23 Apr 2018 14:15:44 +0000 (23 22:15 +0800) | ||
| tree | 29cb3f99f16698754507b5eca39ee154efb1b437 | treesnapshot (tar.gz zip) |
| parent | dd8be70aa00232616d8f186ad11e78fe9b1ca0fc | commitdiff |
x86_64/ioapic: Make sure that legacy IRQ only appears on one CPU.
The legacy IRQ lookup assumes only one CPU has a given legacy IRQ.
On system w/ large number of IOAPIC, GSI96 could be mapped to IRQ17
on CPU0 (since IRQ96 is used by SYSCALL), while GSI17 is mapped to
IRQ17 on another CPU. This breaks later IRQ lookup.
Reported-by: Imre Vadasz
Tested-by: Imre Vadasz
The legacy IRQ lookup assumes only one CPU has a given legacy IRQ.
On system w/ large number of IOAPIC, GSI96 could be mapped to IRQ17
on CPU0 (since IRQ96 is used by SYSCALL), while GSI17 is mapped to
IRQ17 on another CPU. This breaks later IRQ lookup.
Reported-by: Imre Vadasz
Tested-by: Imre Vadasz
| sys/platform/pc64/apic/ioapic_abi.c | diffblobblamehistory |