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apic: disable reentrancy detection for apic-msi 

As the code is designed for re-entrant calls to apic-msi, mark apic-msi
as reentrancy-safe.

Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Message-Id: <20230427211013.2994127-9-alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 50795ee051)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Alexander Bulekov 2023-04-27 17:10:13 -04:00 committed by Michael Tokarev
parent 1247481530
commit 79873ecad0
1 changed files with 7 additions and 0 deletions
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7
hw/intc/apic.c
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@ -883,6 +883,13 @@ static void apic_realize(DeviceState *dev, Error **errp)
memory_region_init_io(&s->io_memory, OBJECT(s), &apic_io_ops, s, "apic-msi",
APIC_SPACE_SIZE);
/*
* apic-msi's apic_mem_write can call into ioapic_eoi_broadcast, which can
* write back to apic-msi. As such mark the apic-msi region re-entrancy
* safe.
*/
s->io_memory.disable_reentrancy_guard = true;
s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, apic_timer, s);
local_apics[s->id] = s;