[Xen-devel] [PATCH v4 0/2] xen/arm: Automatically find a PPI for the DOM0 event IRQ

[Julien Grall <julien.grall@xxxxxxxxxx>]

Hello,

This patch series replaces the per-platform hardcoded event channel interrupt
to a generic solution. It will make the port to a new platform easier and may
avoid to introduce per-platform code with the new upcoming ACPI support.

This could be done by keeping track of vIRQ (emulated and assigned) used by
a domain.

While the new set of function to keep track of vIRQ is only used for PPI in
this series, we will need them for IRQ routing very soon.

Parth: I provided an updated branch on my personal repo [1]. It's based
on the latest upstream branch. The way to allocate a new PPI has changed in
this version. Please use vgic_allocate_ppi(d) now.

Major changes in v4:
    - Use do {} while in vgic_allocate_irq

Major changes in v3:
    - Add vgic_allocate_spi and vgic_allocate_ppi
    - Use a placeholder for the evtchn interrupt and fixup the property
    - Former patch #1 has been accepted

Major changes in v2:
    - Rework patch #2 to drop the lock
    - Rework vgic_free_virq whcih was completely buggy
    - Drop former patch #3 [2]. I will send a separate series to RAZ/WI
    register bits which are associated to unwired IRQ.

For all the changes see in each patch.

Sincerely yours,

[1] git://xenbits.xen.org/people/julieng/xen-unstable.git branch find-evtchn-v4
[2] https://patches.linaro.org/42184

Julien Grall (2):
  xen/arm: vgic: Keep track of vIRQ used by a domain
  xen/arm: Automatically find a PPI for the DOM0 event channel interrupt

 xen/arch/arm/domain.c                | 14 +++++++--
 xen/arch/arm/domain_build.c          | 57 ++++++++++++++++++++++++++++++------
 xen/arch/arm/platform.c              |  7 -----
 xen/arch/arm/platforms/xgene-storm.c |  5 +++-
 xen/arch/arm/vgic.c                  | 55 ++++++++++++++++++++++++++++++++++
 xen/arch/arm/vtimer.c                | 25 ++++++++++++++++
 xen/include/asm-arm/domain.h         |  1 +
 xen/include/asm-arm/platform.h       |  4 ---
 xen/include/asm-arm/vgic.h           | 23 +++++++++++++++
 9 files changed, 167 insertions(+), 24 deletions(-)

-- 
2.1.4


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