linux-kernel - Re: [GIT PULL] xen PV on HVM and initial domain

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Message-ID: <alpine.DEB.2.00.1010271901350.1407@kaball-desktop>
Date:	Wed, 27 Oct 2010 19:08:04 +0100
From:	Stefano Stabellini <stefano.stabellini@...citrix.com>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
CC:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	Jeremy Fitzhardinge <jeremy@...p.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: Re: [GIT PULL] xen PV on HVM and initial domain

Linus,
I added another commit at the end of the branch to fix MSI setup issues
when Linux is running as initial domain on Xen.
The shortlog and the diffstat are slightly different now:

Jeremy Fitzhardinge (5):
      acpi: use indirect call to register gsi in different modes
      xen: add xen hvm acpi_register_gsi variant
      xen: remap GSIs as pirqs when running as initial domain
      xen: map a dummy page for local apic and ioapic in xen_set_fixmap
      xen: make hvc_xen console work for dom0.

Juan Quintela (2):
      xen: Initialize xenbus for dom0.
      xen: add the direct mapping area for ISA bus access

Qing He (1):
      xen: remap MSIs into pirqs when running as initial domain

Stefano Stabellini (10):
      xen: support pirq != irq
      xen: get the maximum number of pirqs from xen
      xen: implement xen_hvm_register_pirq
      xen: support GSI -> pirq remapping in PV on HVM guests
      xen: map MSIs into pirqs
      xen: introduce XEN_DOM0 as a silent option
      xen: use vcpu_ops to setup cpu masks
      xen: mask the MTRR feature from the cpuid
      xen: add a missing #include to arch/x86/pci/xen.c
      xen: initialize cpu masks for pv guests in xen_smp_init

Weidong Han (1):
      xen: register xen pci notifier

 arch/x86/include/asm/acpi.h       |    3 +
 arch/x86/include/asm/xen/pci.h    |   12 ++
 arch/x86/kernel/acpi/boot.c       |   60 +++++--
 arch/x86/pci/xen.c                |  308 ++++++++++++++++++++++++++++++++++--
 arch/x86/xen/Kconfig              |   10 ++
 arch/x86/xen/enlighten.c          |    2 +
 arch/x86/xen/mmu.c                |   47 ++++++-
 arch/x86/xen/setup.c              |    3 +
 arch/x86/xen/smp.c                |   26 +++
 drivers/char/hvc_xen.c            |   98 ++++++++----
 drivers/xen/Makefile              |    1 +
 drivers/xen/events.c              |  195 +++++++++++++++++++++---
 drivers/xen/pci.c                 |  117 ++++++++++++++
 drivers/xen/xenbus/xenbus_probe.c |   29 ++++-
 include/xen/events.h              |    8 +
 include/xen/interface/features.h  |    3 +
 include/xen/interface/physdev.h   |   67 ++++++++
 17 files changed, 897 insertions(+), 92 deletions(-)


The branch is still:

git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git for-linus

otherwise if you prefer the old branch, without this commit, pull this:

git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git 2.6.36-rc8-initial-domain-v7


Many thanks in advance,

Stefano

On Tue, 26 Oct 2010, Stefano Stabellini wrote:
> Linus,
> I have two patch series that I would like you to pull:
> 
> PV on HVM: receive interrupts as xen events [1]
> xen: initial domain support [2]
> 
> Please pull from the following branch:
> 
> git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git for-linus
> 
> it contains both series rebased on Konrad's xen-pcifront series [3]
> (they depend on it, unfortunately I cannot produce a working series
> without it) on Linux 2.6.36 rc8; my two patch series start after git
> commit 67ba37293e938208795d6a3562201bdb0cf43393.
> 
> The first patch series introduces some performance improvements for Xen
> PV on HVM guests: interacting with the emulated APIC is slow because it
> causes traps in the hypervisor while receiving Xen events using the
> vector callback mechanism allow us to skip all that. For this reason we
> remap interrupts and MSIs into Xen pirqs so that from that point on we
> can receive them as Xen events instead.
> 
> The second patch series implements the basic support needed to boot
> Linux as initial domain on Xen: the target is not to add full featured
> dom0 support in the kernel but to be able to boot Linux on Xen on
> native.
> 
> I have just added a last minute fix at end to solve a vcpu
> initialization problem for pv guests (they would see only a single vcpu
> even though they are given more than one [4]).
> 
> 
> All together the two series introduce the following changes:
> 
> Jeremy Fitzhardinge (5):
>       acpi: use indirect call to register gsi in different modes
>       xen: add xen hvm acpi_register_gsi variant
>       xen: remap GSIs as pirqs when running as initial domain
>       xen: map a dummy page for local apic and ioapic in xen_set_fixmap
>       xen: make hvc_xen console work for dom0.
> 
> Juan Quintela (2):
>       xen: Initialize xenbus for dom0.
>       xen: add the direct mapping area for ISA bus access
> 
> Qing He (1):
>       xen: remap MSIs into pirqs when running as initial domain
> 
> Stefano Stabellini (10):
>       xen: support pirq != irq
>       xen: get the maximum number of pirqs from xen
>       xen: implement xen_hvm_register_pirq
>       xen: support GSI -> pirq remapping in PV on HVM guests
>       xen: map MSIs into pirqs
>       xen: introduce XEN_DOM0 as a silent option
>       xen: use vcpu_ops to setup cpu masks
>       xen: mask the MTRR feature from the cpuid
>       xen: add a missing #include to arch/x86/pci/xen.c
>       xen: initialize cpu masks for pv guests in xen_smp_init
> 
>  arch/x86/include/asm/acpi.h       |    3 +
>  arch/x86/include/asm/xen/pci.h    |   12 ++
>  arch/x86/kernel/acpi/boot.c       |   60 +++++--
>  arch/x86/pci/xen.c                |  308 ++++++++++++++++++++++++++++++++++--
>  arch/x86/xen/Kconfig              |   10 ++
>  arch/x86/xen/enlighten.c          |    2 +
>  arch/x86/xen/mmu.c                |   47 ++++++-
>  arch/x86/xen/setup.c              |    3 +
>  arch/x86/xen/smp.c                |   26 +++
>  drivers/char/hvc_xen.c            |   98 ++++++++----
>  drivers/xen/events.c              |  195 +++++++++++++++++++++---
>  drivers/xen/xenbus/xenbus_probe.c |   29 ++++-
>  include/xen/events.h              |    8 +
>  include/xen/interface/features.h  |    3 +
>  include/xen/interface/physdev.h   |   46 ++++++
>  15 files changed, 758 insertions(+), 92 deletions(-)
> 
> Cheers,
> 
> Stefano
> 
> ---
> [1] http://lkml.org/lkml/2010/10/12/246 
> [2] http://lkml.org/lkml/2010/10/19/199
> [3] http://lkml.org/lkml/2010/10/26/231
> [4] http://lkml.org/lkml/2010/10/26/369 
> --
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