From mboxrd@z Thu Jan 1 00:00:00 1970 From: Toshi Kani Subject: Re: [patch 0/9 v3] kexec kernel efi runtime support Date: Fri, 22 Nov 2013 15:29:45 -0700 Message-ID: <1385159385.1791.160.camel@misato.fc.hp.com> References: <20131121061704.363730447@dhcp-16-126.nay.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20131121061704.363730447-je1gSBvt1TcFLmT5oZ11vB/sF2h8X+2i0E9HWUfgJXw@public.gmane.org> Sender: linux-efi-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, mjg59-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org, hpa-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org, James.Bottomley-d9PhHud1JfjCXq6kfMZ53/egYHeGw8Jk@public.gmane.org, vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org, horms-/R6kz+dDXgpPR4JQBCEnsQ@public.gmane.org, kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, bp-Gina5bIWoIWzQB+pC5nmwQ@public.gmane.org, greg-U8xfFu+wG4EAvxtiuMwx3w@public.gmane.org, matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org List-Id: linux-efi@vger.kernel.org On Thu, 2013-11-21 at 14:17 +0800, dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org wrote: > Hi, >=20 > Here is the V3 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. >=20 > For fw_vendor, runtime, config table, I export them in /sys/firmware/ > efi/, smbios is already in /sys/firmware/efi/systab. >=20 > For efi runtime mapping I add a new directory /sys/firmware/efi/ > runtime-map/ like below > [dave@darkstar ~]$ tree /sys/firmware/efi/runtime-map/ > /sys/firmware/efi/runtime-map/ > =E2=94=9C=E2=94=80=E2=94=80 0 > =E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 attribute > =E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 num_pages > =E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 phys_addr > =E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 type > =E2=94=82 =E2=94=94=E2=94=80=E2=94=80 virt_addr > =E2=94=9C=E2=94=80=E2=94=80 1 > =E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 attribute > =E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 num_pages > =E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 phys_addr > =E2=94=82 =E2=94=9C=E2=94=80=E2=94=80 type > =E2=94=82 =E2=94=94=E2=94=80=E2=94=80 virt_addr > [snip] > =20 > kexec-tools will assemble them as setup_data and pass to 2nd kernel. > I will send userspace patches as well. >=20 > 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 Tested on an HP EFI-based 60-way server (prototype). For the series: Tested-by: Toshi Kani Thanks, -Toshi