On PowerVM, the first time we boot a Linux partition, we may only get
256MB of real memory area, even if the partition has more memory.
This isn't enough to reliably verify a kernel. Fortunately, the Power
Architecture Platform Reference (PAPR) defines a method we can call to ask
for more memory: the broad and powerful ibm,client-architecture-support
(CAS) method.
CAS can do an enormous amount of things on a PAPR platform: as well as
asking for memory, you can set the supported processor level, the interrupt
controller, hash vs radix mmu, and so on.
If:
- we are running under what we think is PowerVM (compatible property of /
begins with "IBM"), and
- the full amount of RMA is less than 512MB (as determined by the reg
property of /memory)
then call CAS as follows: (refer to the Linux on Power Architecture
Reference, LoPAR, which is public, at B.5.2.3):
- Use the "any" PVR value and supply 2 option vectors.
- Set option vector 1 (PowerPC Server Processor Architecture Level)
to "ignore".
- Set option vector 2 with default or Linux-like options, including a
min-rma-size of 512MB.
- Set option vector 3 to request Floating Point, VMX and Decimal Floating
point, but don't abort the boot if we can't get them.
- Set option vector 4 to request a minimum VP percentage to 1%, which is
what Linux requests, and is below the default of 10%. Without this,
some systems with very large or very small configurations fail to boot.
This will cause a CAS reboot and the partition will restart with 512MB
of RMA. Importantly, grub will notice the 512MB and not call CAS again.
Notes about the choices of parameters:
- A partition can be configured with only 256MB of memory, which would
mean this request couldn't be satisfied, but PFW refuses to load with
only 256MB of memory, so it's a bit moot. SLOF will run fine with 256MB,
but we will never call CAS under qemu/SLOF because /compatible won't
begin with "IBM".)
- unspecified CAS vectors take on default values. Some of these values
might restrict the ability of certain hardware configurations to boot.
This is why we need to specify the VP percentage in vector 4, which is
in turn why we need to specify vector 3.
Finally, we should have enough memory to verify a kernel, and we will
reach Linux. One of the first things Linux does while still running under
OpenFirmware is to call CAS with a much fuller set of options (including
asking for 512MB of memory). Linux includes a much more restrictive set of
PVR values and processor support levels, and this CAS invocation will likely
induce another reboot. On this reboot grub will again notice the higher RMA,
and not call CAS. We will get to Linux again, Linux will call CAS again, but
because the values are now set for Linux this will not induce another CAS
reboot and we will finally boot all the way to userspace.
On all subsequent boots, everything will be configured with 512MB of RMA,
so there will be no further CAS reboots from grub. (phyp is super sticky
with the RMA size - it persists even on cold boots. So if you've ever booted
Linux in a partition, you'll probably never have grub call CAS. It'll only
ever fire the first time a partition loads grub, or if you deliberately lower
the amount of memory your partition has below 512MB.)
Signed-off-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Tested-by: Nageswara R Sastry <rnsastry@linux.ibm.com>
Reviewed-by: Robbie Harwood <rharwood@redhat.com>
Open Hack'Ware was an alternative firmware of powerpc under QEMU.
The last commit to any Open Hack'Ware repo I can find is from 2014 [1].
Open Hack'Ware was used for the QEMU "prep" machine type, which was
deprecated in QEMU in commit 54c86f5a4844 (hw/ppc: deprecate the
machine type 'prep', replaced by '40p') in QEMU v3.1, and had reportedly
been broken for years before without anyone noticing. Support was removed
in February 2020 by commit b2ce76a0730e (hw/ppc/prep: Remove the
deprecated "prep" machine and the OpenHackware BIOS).
Open Hack'Ware's limitations require some messy code in GRUB. This
complexity is not worth carrying any more.
Remove detection of Open Hack'Ware. We will clean up the feature flags
in following commits.
[1]: https://github.com/qemu/openhackware and
https://repo.or.cz/w/openhackware.git are QEMU submodules. They have
only small changes on top of OHW v0.4.1, which was imported into
QEMU SCM in 2010. I can't find anything resembling an official repo
any more.
Signed-off-by: Daniel Axtens <dja@axtens.net>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Add a new disk driver called obdisk for IEEE1275 platforms. Currently
the only platform using this disk driver is SPARC, however other IEEE1275
platforms could start using it if they so choose. While the functionality
within the current IEEE1275 ofdisk driver may be suitable for PPC and x86, it
presented too many problems on SPARC hardware.
Within the old ofdisk, there is not a way to determine the true canonical
name for the disk. Within Open Boot, the same disk can have multiple names
but all reference the same disk. For example the same disk can be referenced
by its SAS WWN, using this form:
/pci@302/pci@2/pci@0/pci@17/LSI,sas@0/disk@w5000cca02f037d6d,0
It can also be referenced by its PHY identifier using this form:
/pci@302/pci@2/pci@0/pci@17/LSI,sas@0/disk@p0
It can also be referenced by its Target identifier using this form:
/pci@302/pci@2/pci@0/pci@17/LSI,sas@0/disk@0
Also, when the LUN=0, it is legal to omit the ,0 from the device name. So with
the disk above, before taking into account the device aliases, there are 6 ways
to reference the same disk.
Then it is possible to have 0 .. n device aliases all representing the same disk.
Within this new driver the true canonical name is determined using the the
IEEE1275 encode-unit and decode-unit commands when address_cells == 4. This
will determine the true single canonical name for the device so multiple ihandles
are not opened for the same device. This is what frequently happens with the old
ofdisk driver. With some devices when they are opened multiple times it causes
the entire system to hang.
Another problem solved with this driver is devices that do not have a device
alias can be booted and used within GRUB. Within the old ofdisk, this was not
possible, unless it was the original boot device. All devices behind a SAS
or SCSI parent can be found. Within the old ofdisk, finding these disks
relied on there being an alias defined. The alias requirement is not
necessary with this new driver. It can also find devices behind a parent
after they have been hot-plugged. This is something that is not possible
with the old ofdisk driver.
The old ofdisk driver also incorrectly assumes that the device pointing to by a
device alias is in its true canonical form. This assumption is never made with
this new driver.
Another issue solved with this driver is that it properly caches the ihandle
for all open devices. The old ofdisk tries to do this by caching the last
opened ihandle. However this does not work properly because the layer above
does not use a consistent device name for the same disk when calling into the
driver. This is because the upper layer uses the bootpath value returned within
/chosen, other times it uses the device alias, and other times it uses the
value within grub.cfg. It does not have a way to figure out that these devices
are the same disk. This is not a problem with this new driver.
Due to the way GRUB repeatedly opens and closes the same disk. Caching the
ihandle is important on SPARC. Without caching, some SAS devices can take
15 - 20 minutes to get to the GRUB menu. This ihandle caching is not possible
without correctly having the canonical disk name.
When available, this driver also tries to use the deblocker #blocks and
a way of determining the disk size.
Finally and probably most importantly, this new driver is also capable of
seeing all partitions on a GPT disk. With the old driver, the GPT
partition table can not be read and only the first partition on the disk
can be seen.
Signed-off-by: Eric Snowberg <eric.snowberg@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
is_qemu is not being set lead to disabling of feature like
GRUB_IEEE1275_FLAG_HAS_CURSORONOFF. This resulted in cursor not being
displayed during the grub-menu edit.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
GRUB_IEEE1275_FLAG_CURSORONOFF_ANSI_BROKEN on mac.
* grub-core/term/ieee1275/console.c (grub_console_init_lately): Use
ieee1275-nocursor if GRUB_IEEE1275_FLAG_CURSORONOFF_ANSI_BROKEN is set.
* grub-core/term/terminfo.c (grub_terminfo_set_current): Add new type
ieee1275-nocursor.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_flag): New value
GRUB_IEEE1275_FLAG_CURSORONOFF_ANSI_BROKEN.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_flag): New enum values
GRUB_IEEE1275_FLAG_NO_OFNET_SUFFIX and
GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN.
* grub-core/net/drivers/efi/efinet.c (grub_efinet_findcards): Use
txbufsize.
* grub-core/kern/ieee1275/cmain.c (grub_ieee1275_find_options): Use
compatible property to check for macs. Set
GRUB_IEEE1275_FLAG_NO_OFNET_SUFFIX and
GRUB_IEEE1275_FLAG_VIRT_TO_REAL_BROKEN on macs.
* grub-core/net/drivers/ieee1275/ofnet.c (card_open): Don't add suffix
if GRUB_IEEE1275_FLAG_NO_OFNET_SUFFIX is set.
(send_card_buffer): Use txbuf.
(grub_ofnet_findcards): Allocate txbuf. Simplify code flow and move
nested function out of the parent while on it.
GRUB_IEEE1275_FLAG_NO_TREE_SCANNING_FOR_DISKS is set.
* grub-core/kern/ieee1275/cmain.c (grub_ieee1275_find_options): Set
GRUB_IEEE1275_FLAG_NO_TREE_SCANNING_FOR_DISKS on IBM hardware.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_flag): New enum value
GRUB_IEEE1275_FLAG_NO_TREE_SCANNING_FOR_DISKS.
* grub-core/Makefile.core.def (kernel): Use kern/ieee1275/init.c
instead of kern/sparc64/ieee1275/init.c.
* grub-core/kern/ieee1275/cmain.c (grub_ieee1275_find_options)
[__sparc__]: Set GRUB_IEEE1275_FLAG_NO_PARTITION_0.
* grub-core/kern/ieee1275/init.c [__sparc__]: Include
grub/machine/kernel.h.
(grub_ieee1275_original_stack) [__sparc__]: New variable.
(grub_claim_heap) [__sparc__]: Use sparc version.
(grub_machine_init): Moved args parsing to
(grub_parse_cmdline): ...this.
* grub-core/kern/sparc64/ieee1275/init.c: Removed.
* include/grub/offsets.h (GRUB_KERNEL_SPARC64_IEEE1275_MOD_GAP):
New definition.
(GRUB_KERNEL_SPARC64_IEEE1275_MOD_ALIGN): Likewise.
Move BOOTP to separate file.
* grub-core/Makefile.core.def (net): Add net/bootp.c.
* grub-core/net/net.c: Move all BOOTP functions to
* grub-core/net/bootp.c: ... here.
Use frame interface on PXE.
* grub-core/Makefile.core.def (pxecmd): Removed.
(pxe): Use net/drivers/i386/pc/pxe.c rather than net/i386/pc/pxe.c.
* grub-core/commands/i386/pc/pxecmd.c: Removed.
* grub-core/i386/pc/pxe.c: Moved from here ...
* grub-core/net/i386/pc/pxe.c: ... here. Rewritten.
* grub-core/net/net.c (grub_net_open_real): Handle old pxe syntax.
* include/grub/i386/pc/pxe.h (grub_pxe_unload): Removed.
EFI network support.
* grub-core/Makefile.core.def (efinet): New module.
* grub-core/disk/efi/efidisk.c (compare_device_paths): Moved from
here...
* grub-core/kern/efi/efi.c (grub_efi_compare_device_paths): ... here.
All users updated.
* grub-core/kern/efi/init.c (grub_efi_net_config): New variable.
(grub_machine_get_bootlocation): Call grub_efi_net_config if needed.
* grub-core/kern/x86_64/efi/callwrap.S (efi_wrap_7): New function.
* grub-core/net/drivers/efi/efinet.c: New file.
* include/grub/efi/efi.h (grub_efi_compare_device_paths): New proto.
(grub_efi_net_config): New extern var.
Various cleanups and bugfixes.
* grub-core/disk/efi/efidisk.c (grub_efidisk_open): Fix off-by-one
error.
(grub_efidisk_get_device_name): Unify similar codepaths. Accept whole
disk declared as partition.
* grub-core/disk/ieee1275/ofdisk.c (grub_ofdisk_open): Fix memory
leak on failure.
* grub-core/kern/dl.c (grub_dl_load_file): Fix memory leak.
* grub-core/kern/mm.c (grub_debug_malloc): Don't use unsupported %zx.
(grub_debug_zalloc): Likewise.
(grub_debug_realloc): Likewise.
(grub_debug_memalign): Likewise.
* grub-core/net/arp.c (grub_net_arp_receive): IPv4 is 4-byte wide.
Check that target is IPv4.
* grub-core/net/drivers/ieee1275/ofnet.c (grub_ofnet_findcards): Use
local-mac-address as fallback.
* grub-core/net/ethernet.c (grub_net_recv_ethernet_packet): Prevent
memory leak.
* grub-core/net/ip.c (ipchksum): Rename to ...
(grub_net_ip_chksum): ... this. All users updated.
(grub_net_recv_ip_packets): Special handling for DHCP.
* util/grub-mkimage.c (generate_image): Zero-out aout header.
Unify prefix handling
* grub-core/kern/efi/init.c (grub_efi_set_prefix): Revamped into ...
(grub_machine_get_bootlocation): ... this.
* grub-core/kern/emu/main.c (grub_machine_set_prefix): Revamped into ...
(grub_machine_get_bootlocation): ... this.
(grub_prefix): New variable.
(prefix): Removed.
(root_dev): New variable.
(dir): Likewise.
(main): Use new variables.
* grub-core/kern/i386/coreboot/init.c (grub_machine_set_prefix):
Revamped into ...
(grub_machine_get_bootlocation): ... this.
* grub-core/kern/i386/efi/init.c (grub_machine_set_prefix): Removed.
* grub-core/kern/i386/pc/init.c (make_install_device): Revamped into ...
(grub_machine_get_bootlocation): ... this.
(grub_machine_set_prefix): Removed.
* grub-core/kern/ia64/efi/init.c (grub_machine_set_prefix): Removed.
* grub-core/kern/ieee1275/init.c (grub_machine_set_prefix):
Revamped into ...
(grub_machine_get_bootlocation): ... this.
* grub-core/kern/main.c (grub_set_root_dev): Revamped into ...
(grub_set_prefix_and_root): ... this. All users updated.
* grub-core/kern/mips/init.c (grub_machine_set_prefix):
Revamped into ...
(grub_machine_get_bootlocation): ... this.
* include/grub/kernel.h (grub_machine_set_prefix): Removed.
(grub_machine_get_bootlocation): New proto.
* include/grub/i386/pc/kernel.h (grub_pc_net_config): New var.
Less intrusive and more reliable seek on network implementation.
* grub-core/kern/file.c (grub_file_net_seek): Removed.
(grub_file_seek): Don't call grub_file_net_seek.
* grub-core/net/net.c (grub_net_fs_read): Renamed to ...
(grub_net_fs_read_real): .. this.
(grub_net_seek_real): Use net->offset.
(grub_net_fs_read): Seek if necessary.
Unify IEEE1275 netwotk config with the other platforms.
* grub-core/kern/ieee1275/init.c (grub_ieee1275_net_config):
New variable.
(grub_machine_get_bootlocation): Support network.
* grub-core/kern/ieee1275/openfw.c (grub_ieee1275_parse_args):
Support type and device parsing.
(grub_ieee1275_get_device_type): New function.
* grub-core/net/drivers/ieee1275/ofnet.c (grub_getbootp_real): Revamped
into ...
(grub_ieee1275_net_config_real): ... this.
(grub_ofnet_probecards): Removed.
* grub-core/Makefile.am (KERNEL_HEADER_FILES): Remove ofnet.h.
* include/grub/ieee1275/ofnet.h: Removed.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_net_config): NEw
extern var.
(grub_ieee1275_get_device_type): New function.
Unify network device closing across platforms and make more robust.
* grub-core/kern/ieee1275/init.c (grub_machine_fini): Don't call
grub_grubnet_fini.
* grub-core/net/ethernet.c (send_ethernet_packet): Open card if it isn't
already.
* grub-core/net/net.c (grub_net_network_level_interface_register):
Update num_ifaces.
(grub_net_card_unregister): Close all interfaces.
(receive_packets): Don't poll if no iterfaces are registered.
Open if necessary.
(grub_net_fini_hw): New function.
(grub_net_restore_hw): Likewise.
(fini_hnd): New variable.
(GRUB_MOD_INIT): Register preboot hook.
(GRUB_MOD_FINI): Run and unregister preboot hook.
Poll network cards when idle.
* grub-core/kern/term.c (grub_net_poll_cards_idle): New variable.
(grub_checkkey): Call grub_net_poll_cards_idle if it's not NULL.
* grub-core/net/net.c (receive_packets): Save last poll time.
(grub_net_poll_cards_idle_real): New function.
(GRUB_MOD_INIT): Register grub_net_poll_cards_idle.
(GRUB_MOD_FINI): Unregister grub_net_poll_cards_idle.
* include/grub/kernel.h (grub_poll_cards_idle): New extern variable.
Rename ofnet interfaces.
* grub-core/net/drivers/ieee1275/ofnet.c (find_alias): New function.
(grub_ofnet_findcards): Use ofnet_%s names.
* util/grub-mknetdir.in: Support for EFI and IEEE1275.
Cleanup socket opening.
* grub-core/net/net.c (grub_net_fs_open): Rewritten.
(grub_net_fs_close): Likewise.
(grub_net_fs_read_real): Use eof member.
* include/grub/net/udp.h (+grub_net_udp_open): New proto.
(+grub_net_udp_close): New inline function.
* include/grub/net/tftp.h: Moved to the top of ...
* grub-core/net/tftp.c: ... here.
* include/grub/net/ip.h: Moved mostly to the top of ...
* grub-core/net/ip.c: ... here.
* include/grub/net/ethernet.h: Moved mostly to the top of ...
* grub-core/net/ethernet.c: ... here.
* grub-core/kern/device.c (grub_device_close): Free device->net->server.
* grub-core/commands/probe.c (grub_cmd_probe): Use protocol name for
FS name.
* include/grub/net/ip.h (ipv4_ini): Removed.
(ipv4_fini): Likewise.
* include/grub/net/ip.h (grub_net_recv_ip_packets): New proto.
(grub_net_send_ip_packets): Likewise.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_flag): New enum value
GRUB_IEEE1275_FLAG_BROKEN_ADDRESS_CELLS.
* grub-core/kern/ieee1275/mmap.c (grub_machine_mmap_iterate): Ignore
adress_cells and size:cells if GRUB_IEEE1275_FLAG_BROKEN_ADDRESS_CELLS
is set.
* grub-core/kern/ieee1275/cmain.c (grub_ieee1275_find_options): Set
GRUB_IEEE1275_FLAG_BROKEN_ADDRESS_CELLS on powermacs.
GRUB_IEEE1275_FLAG_HAS_CURSORONOFF when appropriate.
* grub-core/term/ieee1275/ofconsole.c (grub_ofconsole_setcursor):
Use terminfo and don't use cursor-on/cursor-off unless it's known
to work.
* include/grub/ieee1275/ieee1275.h (grub_ieee1275_flag): New element
GRUB_IEEE1275_FLAG_HAS_CURSORONOFF.
