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| author | Roman Bolshakov <r.bolshakov@yadro.com> | 2020-03-28 20:44:12 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-04-02 14:55:45 -0400 |
| commit | ddd31732a7379e056749836ff37ff57718083ddb (patch) | |
| tree | fa61df836309f26873213a01352725aad1798c68 /disas | |
| parent | 622e99c5cfcb43d89dc39ed780ab43f48bf748c6 (diff) | |
| download | qemu-ddd31732a7379e056749836ff37ff57718083ddb.zip qemu-ddd31732a7379e056749836ff37ff57718083ddb.tar.gz qemu-ddd31732a7379e056749836ff37ff57718083ddb.tar.bz2 | |
i386: hvf: Reset IRQ inhibition after moving RIP
The sequence of instructions exposes an issue:
sti
hlt
Interrupts cannot be delivered to hvf after hlt instruction cpu because
HF_INHIBIT_IRQ_MASK is set just before hlt is handled and never reset
after moving instruction pointer beyond hlt.
So, after hvf_vcpu_exec() returns, CPU thread gets locked up forever in
qemu_wait_io_event() (cpu_thread_is_idle() evaluates inhibition
flag and considers the CPU idle if the flag is set).
Cc: Cameron Esfahani <dirty@apple.com>
Signed-off-by: Roman Bolshakov <r.bolshakov@yadro.com>
Message-Id: <20200328174411.51491-1-r.bolshakov@yadro.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'disas')
0 files changed, 0 insertions, 0 deletions