From: James.Bottomley@HansenPartnership.com (James Bottomley)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/4] Documentation: arm: [U]EFI runtime services
Date: Wed, 26 Jun 2013 07:38:19 -0700 [thread overview]
Message-ID: <1372257499.2168.5.camel@dabdike> (raw)
In-Reply-To: <20130626135933.GQ22026@console-pimps.org>
On Wed, 2013-06-26 at 14:59 +0100, Matt Fleming wrote:
> On Wed, 26 Jun, at 03:53:11PM, Leif Lindholm wrote:
> > It's completely feasible, but we'd need to use a different method to do
> > the boot services call with a 1:1 mapping (idmap support is not available
> > until much later in the boot process).
>
> At least if you no longer relied upon the idmap we could potentially
> have a single efi_enter_virtual_mode() call-site in init/main.c, which
> would be nice.
The fixed virtual address scheme currently being looked at for x86_64 to
make SetVirtualAddressMap() kexec invariant doesn't work on 32 bit
because the address space isn't big enough. For ARM, given that we've
much more opportunity to work with the vendors, can we just avoid
transitioning to a virtual address map and always just install a
physical mapping before doing efi calls?
James
next prev parent reply other threads:[~2013-06-26 14:38 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-25 18:10 [PATCH 0/4] arm: [U]EFI runtime services support Leif Lindholm
2013-06-25 18:11 ` [PATCH 1/4] Documentation: arm: [U]EFI runtime services Leif Lindholm
2013-06-25 18:46 ` Christopher Covington
2013-06-25 23:42 ` Stephen Warren
2013-06-26 13:20 ` Grant Likely
2013-06-26 13:53 ` Leif Lindholm
2013-06-26 13:59 ` Matt Fleming
2013-06-26 14:38 ` James Bottomley [this message]
2013-06-27 1:32 ` Matthew Garrett
2013-06-27 6:23 ` Grant Likely
2013-06-27 6:33 ` James Bottomley
2013-06-27 14:37 ` Matthew Garrett
2013-06-27 15:09 ` James Bottomley
2013-06-27 15:37 ` Grant Likely
2013-06-27 17:28 ` Matthew Garrett
2013-06-27 14:54 ` Grant Likely
2013-06-27 15:04 ` James Bottomley
2013-06-27 18:32 ` Russell King - ARM Linux
2013-06-27 9:00 ` Leif Lindholm
2013-06-27 14:38 ` Matthew Garrett
2013-06-27 18:32 ` H. Peter Anvin
2013-06-26 18:32 ` Stephen Warren
2013-06-26 19:31 ` Leif Lindholm
2013-06-27 18:04 ` Stephen Warren
2013-06-27 20:11 ` Grant Likely
2013-06-26 13:13 ` Grant Likely
2013-06-26 14:04 ` Leif Lindholm
2013-06-26 14:35 ` Grant Likely
2013-06-27 14:22 ` Arnd Bergmann
2013-06-30 3:21 ` Rob Landley
2013-06-25 18:11 ` [PATCH 2/4] x86: efi: break efi_lookup_mapped_addr out to generic code Leif Lindholm
2013-06-26 13:30 ` Grant Likely
2013-06-26 13:32 ` Matt Fleming
2013-06-26 14:11 ` Leif Lindholm
2013-06-26 14:40 ` Matt Fleming
2013-06-25 18:11 ` [PATCH 3/4] arm: Add [U]EFI runtime services support Leif Lindholm
2013-06-25 18:20 ` Matthew Garrett
2013-06-26 13:46 ` Grant Likely
2013-06-26 13:46 ` Grant Likely
2013-06-26 13:54 ` Matt Fleming
2013-06-26 14:15 ` Borislav Petkov
2013-06-26 14:35 ` Grant Likely
2013-06-26 14:22 ` Leif Lindholm
2013-06-25 18:11 ` [PATCH 4/4] init: efi: arm: enable (U)EFI runtime services on arm Leif Lindholm
2013-06-26 13:24 ` Grant Likely
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