linux-kernel - Re: [PATCH v3 1/5] efi: Add efi_init

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20140326140217.GO3454@olila.local.net-space.pl>
Date:	Wed, 26 Mar 2014 15:02:17 +0100
From:	Daniel Kiper <daniel.kiper@...cle.com>
To:	Matt Fleming <matt@...sole-pimps.org>
Cc:	linux-efi@...r.kernel.org, linux-ia64@...r.kernel.org,
	linux-kernel@...r.kernel.org, x86@...nel.org,
	xen-devel@...ts.xenproject.org, boris.ostrovsky@...cle.com,
	david.vrabel@...rix.com, eshelton@...ox.com, fenghua.yu@...el.com,
	hpa@...or.com, ian.campbell@...rix.com, jbeulich@...e.com,
	jeremy@...p.org, konrad.wilk@...cle.com, matt.fleming@...el.com,
	mingo@...hat.com, stefano.stabellini@...citrix.com,
	tglx@...utronix.de, tony.luck@...el.com,
	Tang Liang <liang.tang@...cle.com>
Subject: Re: [PATCH v3 1/5] efi: Add efi_init_ops variable

On Wed, Mar 26, 2014 at 12:56:23PM +0000, Matt Fleming wrote:
> On Tue, 25 Mar, at 09:57:52PM, Daniel Kiper wrote:
> > Add efi_init_ops variable which allows us to replace
> > EFI init functions on Xen with its specific stuff.
> >
> > This patch is based on Jan Beulich and Tang Liang work.
> >
> > Signed-off-by: Daniel Kiper <daniel.kiper@...cle.com>
> > Signed-off-by: Tang Liang <liang.tang@...cle.com>
> > ---
> >  arch/ia64/kernel/efi.c      |   30 +++++++++++++++++++++---------
> >  arch/x86/platform/efi/efi.c |   18 +++++++++++++-----
> >  drivers/firmware/efi/efi.c  |   26 ++++++++++++++++++++++++++
> >  include/linux/efi.h         |    8 ++++++++
> >  4 files changed, 68 insertions(+), 14 deletions(-)
>
> [...]
>
> > @@ -1118,6 +1118,14 @@ u64 efi_mem_attributes(unsigned long phys_addr)
> >  	return 0;
> >  }
> >
> > +struct efi_init_ops efi_init_ops = {
> > +	.efi_init = efi_init_generic,
> > +	.efi_reserve_boot_services = efi_reserve_boot_services_generic,
> > +	.efi_enter_virtual_mode = efi_enter_virtual_mode_generic,
> > +	.efi_mem_type = efi_mem_type_generic,
> > +	.efi_mem_attributes = efi_mem_attributes_generic
> > +};
>
> Please don't create another struct of EFI function pointers.
>
> After this we'll have 3 global efi structures defintions and 4 global
> efi objects on x86,
>
>   - struct efi_early [in the boot stub]
>   - struct efi ['efi_phys' before/'efi' after SetVirtualAddressMap()]
>   - struct efi_init_ops [for the benefit of xen]

What do you suggest? Should we fill all EFI related structures
in xen_efi_probe() (called from xen_start_kernel()) and later
they should be parsed by generic/x86 EFI initialization code?
I suppose that many variables will have NULL (or something relevant)
in Xen dom0 and it will require some changes in EFI initialization code.

> I have a big problem with exposing .efi_reserve_boot_services as an API.

Why? efi_reserve_boot_services() is public right now.

Daniel
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/