Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters

From	Mark Rutland <mark.rutland@arm.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters
Date	2015-09-10 13:30 +0200
Message-ID	<q78dd-8pH-17@gated-at.bofh.it> (permalink)
References	<q75S3-4Wf-9@gated-at.bofh.it> <q76O6-6hn-9@gated-at.bofh.it> <q77ha-74B-51@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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> > Does Xen not talk to EFI itself and/or give the kernel a virtual EFI
> > interface?
> 
> Xen talks to EFI itself but the interface provided to dom0 is somewhat
> different: there are no BootServices (Xen calls ExitBootServices before
> running the kernel), and the RuntimeServices go via hypercalls (see
> drivers/xen/efi.c).

That's somewhat hideous; a non Xen-aware OS wouild presumably die if
trying to use any runtime services the normal way? I'm not keen on
describing things that the OS cannot use.

Why can't Xen give a virtual EFI interface to Dom0 / guests? e.g.
create pages of RuntimeServicesCode that are trivial assembly shims
doing hypercalls, and plumb these into the virtual EFI memory map and
tables?

That would keep things sane for any guest, allow for easy addition of
EFI features, and you could even enter the usual EFI entry point,
simulate ExitBootServices(), SetVirtualAddressMap(), and allow the guest
to make things sane for itself...

Mark.
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Thread

[PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters Shannon Zhao <zhaoshenglong@huawei.com> - 2015-09-10 11:00 +0200
  Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-10 12:00 +0200
    Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Stefano Stabellini <stefano.stabellini@eu.citrix.com> - 2015-09-10 12:30 +0200
      Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-10 13:30 +0200
        Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Stefano Stabellini <stefano.stabellini@eu.citrix.com> - 2015-09-10 13:50 +0200
          Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-10 14:20 +0200
            Re: [Xen-devel] [PATCH] efi/libstub/fdt: Standardize the names of  EFI stub parameters Ian Campbell <ian.campbell@citrix.com> - 2015-09-10 15:00 +0200
              Re: [Xen-devel] [PATCH] efi/libstub/fdt: Standardize the names  of EFI stub parameters "Jan Beulich" <JBeulich@suse.com> - 2015-09-10 15:10 +0200
                Re: [Xen-devel] [PATCH] efi/libstub/fdt: Standardize the names of  EFI stub parameters Ian Campbell <ian.campbell@citrix.com> - 2015-09-10 15:40 +0200
            Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Stefano Stabellini <stefano.stabellini@eu.citrix.com> - 2015-09-10 16:00 +0200
              Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Leif Lindholm <leif.lindholm@linaro.org> - 2015-09-10 16:20 +0200
              Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-10 16:50 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Stefano Stabellini <stefano.stabellini@eu.citrix.com> - 2015-09-10 18:20 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-10 18:30 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Daniel Kiper <daniel.kiper@oracle.com> - 2015-09-11 14:50 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Stefano Stabellini <stefano.stabellini@eu.citrix.com> - 2015-09-11 15:20 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2015-09-11 15:40 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Daniel Kiper <daniel.kiper@oracle.com> - 2015-09-11 17:50 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters Shannon Zhao <zhaoshenglong@huawei.com> - 2015-09-14 11:00 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2015-09-14 11:10 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters Shannon Zhao <zhaoshenglong@huawei.com> - 2015-09-14 11:40 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2015-09-14 11:40 +0200
                Re: [Xen-devel] [PATCH] efi/libstub/fdt: Standardize the names  of EFI stub parameters "Jan Beulich" <JBeulich@suse.com> - 2015-09-14 12:40 +0200
                Re: [Xen-devel] [PATCH] efi/libstub/fdt: Standardize the names of EFI  stub parameters Ard Biesheuvel <ard.biesheuvel@linaro.org> - 2015-09-14 13:20 +0200
                Re: [Xen-devel] [PATCH] efi/libstub/fdt: Standardize the names  of EFI stub parameters "Jan Beulich" <JBeulich@suse.com> - 2015-09-14 13:40 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-11 18:40 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-11 18:30 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Daniel Kiper <daniel.kiper@oracle.com> - 2015-09-12 13:50 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-14 11:30 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Stefano Stabellini <stefano.stabellini@eu.citrix.com> - 2015-09-14 11:50 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Daniel Kiper <daniel.kiper@oracle.com> - 2015-09-14 14:30 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Ian Campbell <ian.campbell@citrix.com> - 2015-09-11 13:10 +0200
          Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters "Jan Beulich" <JBeulich@suse.com> - 2015-09-10 15:00 +0200
            Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-10 17:00 +0200
              Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters "Jan Beulich" <JBeulich@suse.com> - 2015-09-10 17:10 +0200
                Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Mark Rutland <mark.rutland@arm.com> - 2015-09-11 18:40 +0200
  Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Andrew Turner <andrew@fubar.geek.nz> - 2015-09-10 13:50 +0200
    Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters Julien Grall <julien.grall@citrix.com> - 2015-09-10 13:50 +0200
      Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub  parameters Roger Pau Monné <roger.pau@citrix.com> - 2015-09-10 14:10 +0200
        Re: [Xen-devel] [PATCH] efi/libstub/fdt: Standardize the names of  EFI stub parameters Julien Grall <julien.grall@citrix.com> - 2015-09-10 15:00 +0200
  Re: [PATCH] efi/libstub/fdt: Standardize the names of EFI stub parameters Shannon Zhao <zhaoshenglong@huawei.com> - 2015-09-17 14:00 +0200

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