Message-Id: <20131027034713.481920209@dhcp-16-126.nay.redhat.com>
User-Agent: quilt/0.60-1
Date: Sun, 27 Oct 2013 11:47:13 +0800
From: dyoung@redhat.com
To: linux-kernel@vger.kernel.org
Cc: linux-efi@vger.kernel.org, x86@kernel.org, mjg59@srcf.ucam.org,
        hpa@zytor.com, James.Bottomley@HansenPartnership.com,
        vgoyal@redhat.com, ebiederm@xmission.com, horms@verge.net.au,
        kexec@lists.fedoraproject.org, kexec@lists.infradead.org, bp@alien8.de
Subject: [patch 0/6] kexec kernel efi runtime support 
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1975
Lines: 55

Hi,

Here is the 1st version for supporting kexec kernel efi runtime.
Per pervious discussion I pass the 1st kernel efi runtime mapping
via setup_data to 2nd kernel. Besides of the runtime mapping
info I also pass the fw_vendor, runtime, config table, smbios
physical address in setup_data. EFI spec mentioned fw_vendor,
runtime, config table addresses will be converted to virt address
after entering virtual mode, but we will use it as physical address
in efi_init. For smbios EFI spec did not mention about the address
updating, but during my test on a HP workstation, the bios will
convert it to Virt addr, thus pass it in setup_data as well.

For fw_vendor, runtime, config table, I export them in /sys/firmware/
efi/systab, smbios is already in that file.

For efi runtime mapping I add a new directory /sys/firmware/efi/
efi-runtime-map/ like below
[dave@darkstar ~]$ tree /sys/firmware/efi/efi-runtime-map/
/sys/firmware/efi/efi-runtime-map/
├── 0
│   ├── attribute
│   ├── num_pages
│   ├── phys_addr
│   ├── type
│   └── virt_addr
├── 1
│   ├── attribute
│   ├── num_pages
│   ├── phys_addr
│   ├── type
│   └── virt_addr
[snip]
 
kexec-tools will assemble them as setup_data and pass to 2nd kernel.
I will send userspace patches as well.

Limitation is I only write support for x86_64, test on below machines:
Lenovo thinkpad t420
Dell inspiron 14 - 3421
HP Z420 workstation
Qemu + OVMF

Please help to review the patches.

The patches are based on linus tree (3.12.0-rc6+) + matt's next tree + bp's efi mapping patches
Boris's last patch can not directly apply, need a little line shifting.
--
Thanks
Dave
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