linux-kernel - Re: [Xen-devel] [PATCH v4 00/14] x86: remove paravirt

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Date:	Thu, 7 Apr 2016 15:24:24 +0200
From:	Juergen Gross <jgross@...e.com>
To:	"Luis R. Rodriguez" <mcgrof@...nel.org>, bp@...en8.de,
	hpa@...or.com, tglx@...utronix.de, mingo@...hat.com,
	rusty@...tcorp.com.au
Cc:	xen-devel@...ts.xensource.com, matt@...eblueprint.co.uk,
	andrew.cooper3@...rix.com, x86@...nel.org,
	linux-kernel@...r.kernel.org, luto@...capital.net, jlee@...e.com,
	lguest@...ts.ozlabs.org, glin@...e.com, david.vrabel@...rix.com,
	boris.ostrovsky@...cle.com, andriy.shevchenko@...ux.intel.com
Subject: Re: [Xen-devel] [PATCH v4 00/14] x86: remove paravirt_enabled

On 07/04/16 02:06, Luis R. Rodriguez wrote:
> Now that Andy's ASM paravirt_enabled() use is merged all we need is to address
> the rest of the C code uses. This completes that work by providing proper
> semantics for platform legacy settings and quirks as suggested by Ingo, this in
> turn can also be extended later for benefit of further processing of ACPI
> 5.2.9.3 IA-PC Boot Architecture flags, which we currently don't take much
> advantage of.  For instance the ACPI_FADT_NO_VGA can later be leveraged by bare
> metal x86 *and* HVMLite, as HVMLite seems to plan to set this.
> 
> Also, hpa has noted both Intel MID and CE4100 can make use of disabling
> pnpbios, we can do that separately after this, but it should now be a
> trivial change, generic given this quirk stuff is all generic now.
> 
> This patches goes tested by 0-day, except for the last patch, for some reason
> the branch that included that patch has had testing delayed for quite a
> while now, but I can't think of anything there that should break anything.
> 
> I've also just run time tested this on bare metal only so far.

FWIW: Xen dom0 is booting with the patches applied.


Juergen

> 
> Luis R. Rodriguez (14):
>   x86/boot: enumerate documentation for the x86 hardware_subarch
>   x86/xen: use X86_SUBARCH_XEN for PV guest boots
>   tools/lguest: make lguest launcher use X86_SUBARCH_LGUEST explicitly
>   x86/rtc: replace paravirt rtc check with platform legacy quirk
>   x86, ACPI: move ACPI_FADT_NO_CMOS_RTC check to ACPI boot code
>   x86/init: use a platform legacy quirk for ebda
>   tools/lguest: force disable tboot and apm
>   apm32: remove paravirt_enabled() use
>   x86/tboot: remove paravirt_enabled()
>   x86/cpu/intel: remove not needed paravirt_enabled() for f00f work
>     around
>   pnpbios: replace paravirt_enabled() check with legacy device check
>   x86, ACPI: parse ACPI_FADT_LEGACY_DEVICES
>   x86/init: rename ebda code file
>   x86/paravirt: remove paravirt_enabled()
> 
>  arch/x86/Makefile                     |  3 ++-
>  arch/x86/include/asm/paravirt.h       | 11 ---------
>  arch/x86/include/asm/paravirt_types.h |  6 -----
>  arch/x86/include/asm/processor.h      |  2 --
>  arch/x86/include/asm/x86_init.h       | 42 +++++++++++++++++++++++++++++++++++
>  arch/x86/include/uapi/asm/bootparam.h | 36 +++++++++++++++++++++++++++++-
>  arch/x86/kernel/Makefile              |  6 ++++-
>  arch/x86/kernel/acpi/boot.c           |  9 ++++++++
>  arch/x86/kernel/apm_32.c              |  2 +-
>  arch/x86/kernel/cpu/intel.c           |  2 +-
>  arch/x86/kernel/{head.c => ebda.c}    |  2 +-
>  arch/x86/kernel/head32.c              |  2 ++
>  arch/x86/kernel/head64.c              |  1 +
>  arch/x86/kernel/kvm.c                 |  8 -------
>  arch/x86/kernel/paravirt.c            |  1 -
>  arch/x86/kernel/platform-quirks.c     | 32 ++++++++++++++++++++++++++
>  arch/x86/kernel/rtc.c                 | 15 ++-----------
>  arch/x86/kernel/tboot.c               |  6 -----
>  arch/x86/lguest/boot.c                |  3 ---
>  arch/x86/xen/enlighten.c              |  5 +----
>  drivers/pnp/pnpbios/core.c            |  3 ++-
>  include/linux/pnp.h                   |  2 ++
>  tools/lguest/lguest.c                 | 10 +++++++--
>  23 files changed, 146 insertions(+), 63 deletions(-)
>  rename arch/x86/kernel/{head.c => ebda.c} (98%)
>  create mode 100644 arch/x86/kernel/platform-quirks.c
>