qemu-devel.nongnu.org archive mirror
 help / color / mirror / Atom feed
From: Eric Auger <eric.auger@linaro.org>
To: eric.auger@st.com, christoffer.dall@linaro.org,
	qemu-devel@nongnu.org, marc.zyngier@arm.com,
	peter.maydell@linaro.org, pbonzini@redhat.com, afaerber@suse.de
Cc: patches@linaro.org, kvmarm@lists.cs.columbia.edu, eric.auger@linaro.org
Subject: [Qemu-devel] [RFC v2 0/2] explicit VGIC initialization in finalize function
Date: Thu, 15 Jan 2015 13:05:09 +0000	[thread overview]
Message-ID: <1421327111-1563-1-git-send-email-eric.auger@linaro.org> (raw)

With current implementation the vgic is initialized implicitly,
on-demand. This patch forces the init in the vgic finalize function.
At that point all the dimensioning parameters are known.

A new group/attribute in VGIC KVM device is used for that:
KVM_DEV_ARM_VGIC_GRP_CTRL/KVM_DEV_ARM_VGIC_CTRL_INIT.

Among other things, this earlier VGIC initialization allows to
have a simpler handling of VFIO. VFIO platform signaling can be
setup on reset handler, making sure the VGIC is ready, at that time,
to accept injected virtual IRQs.

Depends on the following kernel patch:
[PATCH v3 0/2] VGIC early initialization initiated by user-space

Tested on Calxeda Miday with VFIO platform use case

Can be found on
http://git.linaro.org/people/eric.auger/qemu.git,
branch vfio_integ_v9

v1 -> v2:
- The init is not mandated to be done in a machine init done notifier
  anymore since only the number of vcpus and number of IRQs must be known
  at init time.

Eric Auger (2):
  linux-headers: update KVM headers from KVM_DEV_ARM_VGIC_GRP_CTRL
  hw/intc/arm_gic: Initialize the vgic in the realize function

 hw/intc/arm_gic_kvm.c         | 6 ++++++
 linux-headers/asm-arm/kvm.h   | 5 +++++
 linux-headers/asm-arm64/kvm.h | 5 +++++
 3 files changed, 16 insertions(+)

-- 
1.8.3.2

             reply	other threads:[~2015-01-15 13:05 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-01-15 13:05 Eric Auger [this message]
2015-01-15 13:05 ` [Qemu-devel] [RFC v2 1/2] linux-headers: update KVM headers from KVM_DEV_ARM_VGIC_GRP_CTRL Eric Auger
2015-01-15 13:05 ` [Qemu-devel] [RFC v2 2/2] hw/intc/arm_gic: Initialize the vgic in the realize function Eric Auger

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1421327111-1563-1-git-send-email-eric.auger@linaro.org \
    --to=eric.auger@linaro.org \
    --cc=afaerber@suse.de \
    --cc=christoffer.dall@linaro.org \
    --cc=eric.auger@st.com \
    --cc=kvmarm@lists.cs.columbia.edu \
    --cc=marc.zyngier@arm.com \
    --cc=patches@linaro.org \
    --cc=pbonzini@redhat.com \
    --cc=peter.maydell@linaro.org \
    --cc=qemu-devel@nongnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).