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[PATCH for-4.22 v2 0/4] ns16550: bound interrupt handler execution time
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- Date: Mon, 29 Jun 2026 11:45:27 +0200
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- Cc: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>, Alistair Francis <alistair.francis@xxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Timothy Pearson <tpearson@xxxxxxxxxxxxxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Mon, 29 Jun 2026 09:46:41 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
Hello,
Same approach as v1, but the introduction of a generic disable_irq()
handler requires two pre-patches for PowerPC and RISCV. There's also an
extra fix for dealing with the interrupt being disabled while executing
the handler in do_IRQ().
Thanks, Roger.
Roger Pau Monne (4):
riscv/irq: define a per-arch irq_to_desc()
xen/ppc: introduce a dummy irq_to_desc()
xen/irq: handle IRQ being disabled while executing its handler
char/ns16550: bound execution time of ns16550_interrupt()
xen/arch/ppc/include/asm/irq.h | 6 ++++++
xen/arch/riscv/include/asm/irq.h | 4 ++++
xen/arch/riscv/irq.c | 5 +++++
xen/arch/x86/irq.c | 4 +++-
xen/common/irq.c | 12 ++++++++++++
xen/drivers/char/ns16550.c | 30 +++++++++++++++++++++++++++++-
xen/include/xen/irq.h | 1 +
7 files changed, 60 insertions(+), 2 deletions(-)
--
2.53.0
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