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Jason A. Donenfeld [Fri, 16 Sep 2022 13:36:03 +0000 (14:36 +0100)] 
Place setup_data at location specified by host
QEMU places setup_data at a particular location, which cannot be
relocated due to it containing self references in absolute address
terms. For this reason, it supplies the intended location in
FW_CFG_SETUP_ADDR. That is what is used in the option ROMs provided
by QEMU, use this too in qboot.
This also has the effect of removing the 8k limit on the copied size,
since the header is copied to the right location from the beginning.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Message-Id: <
20220916133603.693135-1-Jason@zx2c4.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sven Eckelmann [Fri, 22 May 2020 07:36:52 +0000 (09:36 +0200)] 
qboot: Disable PIE for ELF binary build step
The switch to meson in commit
fd2aada36b98 ("Add meson build") had two
major behavior changes for the ELF binary build step:
* ELF binary is no longer build as x86_64 on x86_64
* ELF binary is build as position independent executable on systems with a
"--enable-default-pie" gcc
The latter will create a slightly larger than 64KB bios.bin which causes an
error when Qemu tries to load it:
qemu: could not load PC BIOS 'qboot/build/bios.bin'
This behavior change was introduced because the elf linker step was changed
from using ld directly to using cc. Basically something like following
Makefile change:
bios.bin.elf: $(obj-y) flat.lds
- $(LD) -T flat.lds -o bios.bin.elf $(obj-y)
+ $(CC) -o bios.bin.elf $(obj-y) -Wl,--no-undefined -Wl,--as-needed -nostdlib -m32 -Wl,--build-id=none -Wl,-Tflat.lds
GCC will then take care of calling ld with the appropriate arguments. And
one of these arguments for the "--enable-default-pie" gcc is "-pie":
$(LD) --build-id --eh-frame-hdr -m elf_i386 --hash-style=gnu -dynamic-linker /lib/ld-linux.so.2 -pie -o bios.bin.elf $(obj-y) --no-undefined --as-needed --build-id=none -Tflat.lds
This default behavior of gcc must be suppressed by adding -no-pie to the
arguments when linking the object files.
Signed-off-by: Sven Eckelmann <sven@narfation.org>
Lorenz Brun [Thu, 23 Apr 2020 07:46:45 +0000 (09:46 +0200)] 
Fix initrd base address for PVH boot
Paolo Bonzini [Fri, 13 Mar 2020 15:06:50 +0000 (16:06 +0100)] 
record minimum version of meson that is needed
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 18 Dec 2019 10:02:53 +0000 (11:02 +0100)]
limit C headers to freestanding ones
inttypes.h is not part of the subset of standard headers for
freestanding environments. Replace it with stdint.h.
Also include string.h with quotes, since we provide it.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Marc-Andre Lureau [Fri, 13 Dec 2019 15:05:23 +0000 (19:05 +0400)] 
Update README
Change instructions to build from sources.
Marc-André Lureau [Wed, 16 Oct 2019 20:47:45 +0000 (22:47 +0200)]
Add meson build
That should provide same build results as the Makefile.
tags targets are pending review for meson:
https://github.com/mesonbuild/meson/pull/6058
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
kaihuan.pkh [Mon, 18 Nov 2019 12:08:36 +0000 (20:08 +0800)] 
support smbios
alloc buffer in fseg memory and fill it with smbios anchor and
tables which read from the fw_cfg, then check type0 table and
rebuild it if it's not exist.
mainly inspired by the seabios, and borrowed some code from it.
Reviewed-by: Ben Luo <luoben@linux.alibaba.com>
Signed-off-by: kaihuan.pkh <kaihuan.pkh@alibaba-inc.com>
Paolo Bonzini [Thu, 25 Jul 2019 13:26:26 +0000 (15:26 +0200)]
remove pflash code
Also part of the cbfs support which is now obsolete.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Sergio Lopez [Wed, 24 Jul 2019 14:44:23 +0000 (16:44 +0200)] 
implement mptable generation
This is specially useful for machines lacking ACPI.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Sergio Lopez [Wed, 24 Jul 2019 10:51:26 +0000 (12:51 +0200)]
support machines without PCI
Instead of panicing when a PCI bus isn't found, continue booting
without PCI nor ACPI initialization.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Paolo Bonzini [Wed, 24 Jul 2019 10:18:35 +0000 (12:18 +0200)]
clean up printf
printf is avoiding switch statements so that it can be used in
very early startup, before jump tables can be read from the F segment.
We could use -fno-jump-tables, but we can also keep the if statements
and clean them up so that the indentation is fine.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 24 Jul 2019 10:14:56 +0000 (12:14 +0200)]
do not mix tabs and spaces in a single file
Paolo Bonzini [Tue, 23 Jul 2019 17:45:15 +0000 (19:45 +0200)]
implement PCIBIOS specification
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 24 Jul 2019 08:05:06 +0000 (10:05 +0200)]
clear CF on entry to BIOS handlers
This simplifies the success case, which never has to manipulate
the carry flag.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 24 Jul 2019 08:13:11 +0000 (10:13 +0200)]
remove incorrect flat_to_off16
Here we use offsetof so "start" is not a flat pointer, it is
a pointer inside the e820 segment.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 22 Jul 2019 11:00:28 +0000 (13:00 +0200)]
cleanup PAM check
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 22 Jul 2019 11:01:40 +0000 (13:01 +0200)]
avoid out-of-bounds warnings with recent compilers
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 22 Jul 2019 10:55:48 +0000 (12:55 +0200)]
drop cbfs experiment
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
开恒 [Fri, 12 Jul 2019 09:26:52 +0000 (17:26 +0800)]
bug fix for setup_idt
the setup_idt() has not configured default ISR for all interrupt.
CPU lookup IVT and set 0x0:0x0 (cs:ip) as interrupt handler entry
when received an unexpected interrupt which not setup ISR via
set_realmode_int in setup_idt().
howerver, the 0x0:0x0 point to IVT-self and executing it caused
invalid opcode exception, which the interrupt vector is 6, and the
handler bios_intfake not fixing this problem, this makes CPU run
into a infinite loop.
Stefano Garzarella [Thu, 10 Jan 2019 13:57:27 +0000 (14:57 +0100)] 
pvh: load initrd from fw_cfg
If we found initrd through fw_cfg, we can load it and use the
first module of hvm_start_info to pass initrd address and size
to the kernel.
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Liam Merwick [Thu, 22 Nov 2018 18:07:37 +0000 (18:07 +0000)] 
pvh: add benchmark exit point
This commit adds a PVH specific VM exit point for use in benchmarking
boot times using a QEMU specific device that terminates the QEMU process
and thus the VM itself when handling those VM exits. Since the VM
terminates right at those exit points, generic tools like time can
be used to measure the time spent between the QEMU startup
and termination moments.
The QEMU device used for those measurement is called isa-debug-exit
for the PC and Q35 machine types. These devices take 2 arguments:
iobase and iosize. iobase specifies which IO port we need to write
into to have these devices eventually handle the corresponding VM exit.
If for example, QEMU is started with the following argument:
-device isa-debug-exit,iobase=0xf4
then any IO write to 0xf4 will terminate the QEMU process and the
corresponding VM.
Signed-off-by: Liam Merwick <liam.merwick@oracle.com>
Liam Merwick [Tue, 20 Nov 2018 13:01:47 +0000 (13:01 +0000)]
pvh: use x86/HVM direct boot ABI
These changes (along with corresponding QEMU and Linux kernel changes)
enable a guest to be booted using the x86/HVM direct boot ABI.
QEMU parses the uncompressed kernel binary passed to it via -kernel
to read the ELF Note which contains the address to be loaded. QEMU
then depends on qboot to populate the start_info struct needed by
the direct boot ABI and configure the guest e820 tables before
jumping to the loaded kernel entry.
Signed-off-by: George Kennedy <George.Kennedy@oracle.com>
Signed-off-by: Liam Merwick <Liam.Merwick@oracle.com>
Liam Merwick [Fri, 16 Nov 2018 16:25:57 +0000 (16:25 +0000)]
pvh: Add x86/HVM direct boot ABI header file
The x86/HVM direct boot ABI permits a guest to be able to boot directly
into the uncompressed Linux kernel binary.
https://xenbits.xen.org/docs/unstable/misc/pvh.html
This commit adds the header file that defines the start_info struct
that needs to be populated in order to use this ABI.
Signed-off-by: Maran Wilson <Maran.Wilson@oracle.com>
Signed-off-by: Liam Merwick <liam.merwick@oracle.com>
Liam Merwick [Thu, 6 Dec 2018 21:09:26 +0000 (21:09 +0000)]
qboot: Move inline load and store routines to memaccess.h
Move lduw_p, ldl_p, stw_p, stl_p from linuxboot.c to
include/memaccess.h so they can be reused more easily.
Signed-off-by: Liam Merwick <liam.merwick@oracle.com>
Liam Merwick [Wed, 19 Dec 2018 11:19:32 +0000 (11:19 +0000)]
qboot: add cscope/ctags/TAGS Makefile targets (#16)
Signed-off-by: Liam Merwick <liam.merwick@oracle.com>
Stefano Garzarella [Tue, 11 Dec 2018 17:25:55 +0000 (18:25 +0100)] 
pci: improve PCI bus discovery
When we discovery devices on a PCI BUS, we block bridges, and
we use PCI_SECONDARY_BUS to create a linked list of bridges to
recursively setup new buses. This avoids a second visit of all the
addresses on the bus.
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Fri, 30 Nov 2018 00:00:18 +0000 (01:00 +0100)]
Remove --disable-uuid
It was removed from QEMU.
Fixes #12.
x [Wed, 7 Jun 2017 10:40:52 +0000 (12:40 +0200)] 
qboot/printf.c:141: more undefined references to `_GLOBAL_OFFSET_TABLE_' follow
Fix for qboot/printf.c:141: more undefined references to `_GLOBAL_OFFSET_TABLE_' follow
Samuel Ortiz [Tue, 23 Oct 2018 17:35:14 +0000 (19:35 +0200)] 
main: Add firmware start benchmarking point
We use a different IO port than the Linux boot
benchmarking point.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Samuel Ortiz [Tue, 23 Oct 2018 17:35:02 +0000 (19:35 +0200)]
benchmark: Define exit points and values
Benchmarking IO port addresses and return values are now defined
through a dedicated header.
Each exit point can have its own IO port address and return value.
With this we are able to discriminate between similar code paths
through the QEMU process return values or between different
code paths by having the QEMU debugexit device monitoring
different IO port addresses.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Yang Zhong [Thu, 30 Mar 2017 10:32:53 +0000 (18:32 +0800)] 
qboot: enable mmconfig
Need to enable mmconfig in qboot and also need to reserve
mmconfig space in bios.
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <
1490869973-4562-1-git-send-email-yang.zhong@intel.com>
[Do not affect e820 memory map on i440FX chipset. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Yang Zhong [Thu, 30 Mar 2017 10:20:50 +0000 (18:20 +0800)]
qboot: modified the malloc for fseg and high momory.
The fseg and high memory malloc all use the up align
mode in do_alloc(),which will result in qboot hang
issue.The high memory use the down align mode and fseg
memory use the up align mode. With those changes,the
qemu can boot up the image with qboot.
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <
1490869250-4357-1-git-send-email-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 15 Sep 2016 09:02:38 +0000 (11:02 +0200)]
remove unused macros
Paolo Bonzini [Tue, 6 Sep 2016 14:07:38 +0000 (16:07 +0200)]
update README
Paolo Bonzini [Tue, 6 Sep 2016 13:56:50 +0000 (15:56 +0200)]
skip PAM if unnecessary
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Tue, 6 Sep 2016 13:44:17 +0000 (15:44 +0200)]
copy only ~11K down to low memory
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Tue, 6 Sep 2016 14:17:36 +0000 (16:17 +0200)]
inline string functions to movsb/stosb
Paolo Bonzini [Tue, 6 Sep 2016 13:38:55 +0000 (15:38 +0200)]
use DMA to read fw_cfg file names
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Tue, 6 Sep 2016 13:05:27 +0000 (15:05 +0200)]
use fw_cfg DMA for fw_cfg_read
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Tue, 6 Sep 2016 13:05:08 +0000 (15:05 +0200)]
use fw_cfg DMA for fw_cfg_read_entry
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Tue, 6 Sep 2016 12:44:22 +0000 (14:44 +0200)]
use fw_cfg_read_entry
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Fri, 10 Jul 2015 11:37:00 +0000 (13:37 +0200)]
enable caches at startup
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Sat, 30 May 2015 12:37:32 +0000 (14:37 +0200)]
apply benchmarking hack to multiboot as well
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Sat, 30 May 2015 12:35:18 +0000 (14:35 +0200)]
cbfs: avoid void* arithmetic, constify
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Fri, 29 May 2015 14:50:48 +0000 (16:50 +0200)]
avoid reserved identifiers for header guards
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 27 May 2015 11:07:46 +0000 (13:07 +0200)]
put main at beginning of binary on older compilers
Reported-by: David Halls (via github)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Tue, 26 May 2015 13:15:32 +0000 (15:15 +0200)]
use = for input/output operands
The input side is already handled by the duplicate constraints, and clang
rejects usage of "+".
Reported-by: David Halls (via github)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Kashyap Chamarthy [Mon, 25 May 2015 13:42:33 +0000 (15:42 +0200)] 
README: Add a note on compiling qboot
Signed-off-by: Kashyap Chamarthy <kchamart@redhat.com>
Message-Id: <
1432561354-26220-1-git-send-email-kchamart@redhat.com>
["make" is enough. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 25 May 2015 14:03:58 +0000 (16:03 +0200)]
another embarrassing typo
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 25 May 2015 13:45:03 +0000 (15:45 +0200)]
fix for PCI bridges
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 25 May 2015 13:00:28 +0000 (15:00 +0200)]
an 8MB cbfs flash does not fit together with bios.bin
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 25 May 2015 12:25:01 +0000 (14:25 +0200)]
boot multiboot from fw_cfg
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 25 May 2015 09:14:01 +0000 (11:14 +0200)]
setup PCI devices
setup interrupt line, PCI bridges, and IDE devices
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 25 May 2015 09:13:33 +0000 (11:13 +0200)]
make pci_config_* inline
Small thinko...
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 25 May 2015 09:06:01 +0000 (11:06 +0200)]
initialize the southbridge
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Mon, 25 May 2015 08:22:13 +0000 (10:22 +0200)]
load ACPI tables from fw_cfg
Paolo Bonzini [Thu, 21 May 2015 16:20:17 +0000 (18:20 +0200)]
remove useless file
Reported-by: Avi Kivity <avi@cloudius-systems.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 14:45:21 +0000 (16:45 +0200)]
save one instruction :)
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 14:40:24 +0000 (16:40 +0200)]
add a 16-bit data segment
Otherwise the real mode data segments keep G=D=1.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 14:35:44 +0000 (16:35 +0200)]
fix the 16-bit code segment's granularity
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 14:19:33 +0000 (16:19 +0200)]
commit missing file
reported by Kashyap Chamarty
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 13:39:26 +0000 (15:39 +0200)]
not necessary
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 13:19:41 +0000 (15:19 +0200)]
benchmarking hack
Paolo Bonzini [Thu, 21 May 2015 11:40:18 +0000 (13:40 +0200)]
a nicer README
Paolo Bonzini [Thu, 21 May 2015 10:56:34 +0000 (12:56 +0200)]
speed up KVM by avoiding invalid guest state emulation
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 10:53:25 +0000 (12:53 +0200)]
fix KVM e820 and initrd
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 10:39:53 +0000 (12:39 +0200)]
fix warning
Paolo Bonzini [Thu, 21 May 2015 09:42:37 +0000 (11:42 +0200)]
add README
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 09:40:05 +0000 (11:40 +0200)]
initial support for cbfs
pflash isn't ideal because there's only 8MB room, but it's a
start and it's fast.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 09:03:25 +0000 (11:03 +0200)]
protect against no -kernel
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 07:12:50 +0000 (09:12 +0200)]
initial support for pflash / cbfs
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 08:31:09 +0000 (10:31 +0200)]
malloc fw_cfg files
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 08:26:49 +0000 (10:26 +0200)]
add malloc
Allocate the e820 map in the E-segment.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 08:05:52 +0000 (10:05 +0200)]
build e820 entries for low RAM
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 08:00:47 +0000 (10:00 +0200)]
parse vmlinuz inside firmware
This will make it possible to load the vmlinuz from CBFS. We need
some contortions because QEMU splits the real mode and protected
mode parts of vmlinuz in different fw_cfg files.
The parsing code is lifted from QEMU.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 06:41:21 +0000 (08:41 +0200)]
put 16-bit code in a single file
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 20 May 2015 22:37:46 +0000 (00:37 +0200)]
compute dependencies automatically
getting serious...
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 20 May 2015 21:46:42 +0000 (23:46 +0200)]
boot the kernel
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 20 May 2015 22:39:02 +0000 (00:39 +0200)]
initial fw_cfg support
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 20 May 2015 22:30:07 +0000 (00:30 +0200)]
setup pic
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 20 May 2015 15:15:57 +0000 (17:15 +0200)]
setup idt
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 20 May 2015 15:09:34 +0000 (17:09 +0200)]
make a bootable BIOS
includes source from kvm-unit-tests
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Wed, 20 May 2015 14:03:33 +0000 (16:03 +0200)]
first commit
Based on x86/bios from lkvm
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Paolo Bonzini [Thu, 21 May 2015 09:44:57 +0000 (11:44 +0200)]
Initial commit
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
git://git.qemu.org / qboot.git / log
