Messages in this thread | | | Date | Mon, 15 Aug 2016 13:42:58 +0100 | From | Matt Fleming <> | Subject | Re: [PATCH] Map in physical addresses in efi_map_region_fixed |
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(Cc'ing Boris and Dave)
On Fri, 05 Aug, at 06:59:35PM, Alex Thorlton wrote: > This is a simple change to add in the physical mappings as well as the > virtual mappings in efi_map_region_fixed. The motivation here is to > get access to EFI runtime code that is only available via the 1:1 > mappings on a kexec'd kernel. > > The added call is essentially the kexec analog of the first __map_region > that Boris put in efi_map_region in commit d2f7cbe7b26a ("x86/efi: > Runtime services virtual mapping"). > > Signed-off-by: Alex Thorlton <athorlton@sgi.com> > Cc: Russ Anderson <rja@sgi.com> > Cc: Dimitri Sivanich <sivanich@sgi.com> > Cc: Mike Travis <travis@sgi.com> > Cc: Matt Fleming <matt@codeblueprint.co.uk> > Cc: Thomas Gleixner <tglx@linutronix.de> > Cc: Ingo Molnar <mingo@redhat.com> > Cc: "H. Peter Anvin" <hpa@zytor.com> > Cc: x86@kernel.org > Cc: linux-efi@vger.kernel.org > --- > arch/x86/platform/efi/efi_64.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c > index 459bcbb..b206126 100644 > --- a/arch/x86/platform/efi/efi_64.c > +++ b/arch/x86/platform/efi/efi_64.c > @@ -363,6 +363,7 @@ void __init efi_map_region(efi_memory_desc_t *md) > */ > void __init efi_map_region_fixed(efi_memory_desc_t *md) > { > + __map_region(md, md->phys_addr); > __map_region(md, md->virt_addr); > } >
This looks fine to me. I'm going to run it through my tests and unless anyone complains, apply it for v4.9.
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