The vmclock device addresses the problem of live migration with
precision clocks. The tolerances of a hardware counter (e.g. TSC) are
typically around ±50PPM. A guest will use NTP/PTP/PPS to discipline that
counter against an external source of 'real' time, and track the precise
frequency of the counter as it changes with environmental conditions.
When a guest is live migrated, anything it knows about the frequency of
the underlying counter becomes invalid. It may move from a host where
the counter running at -50PPM of its nominal frequency, to a host where
it runs at +50PPM. There will also be a step change in the value of the
counter, as the correctness of its absolute value at migration is
limited by the accuracy of the source and destination host's time
synchronization.
The device exposes a shared memory region to guests, which can be mapped
all the way to userspace. In the first phase, this merely advertises a
'disruption_marker', which indicates that the guest should throw away any
NTP synchronization it thinks it has, and start again.
Because the region can be exposed all the way to userspace, applications
can still use time from a fast vDSO 'system call', and check the
disruption marker to be sure that their timestamp is indeed truthful.
The structure also allows for the precise time, as known by the host, to
be exposed directly to guests so that they don't have to wait for NTP to
resync from scratch.
The values and fields are based on the nascent virtio-rtc specification,
and the intent is that a version (hopefully precisely this version) of
this structure will be included as an optional part of that spec. In the
meantime, a simple ACPI device along the lines of VMGENID is perfectly
sufficient and is compatible with what's being shipped in certain
commercial hypervisors.
Linux guest support was merged into the 6.13-rc1 kernel:
https://git.kernel.org/torvalds/c/205032724226
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
Message-Id: <07fd5e2f529098ad4d7cab1423fe9f4a03a9cc14.camel@infradead.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
KVM LBT supports on LoongArch depends on the linux-header file
kvm_para.h, add header file kvm_para.h here.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Acked-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20241028023809.1554405-3-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
since 6.11, unistd.h includes header file unistd_64.h directly on
some platforms, here add unistd_64.h on these platforms. Affected
platforms are ARM64, LoongArch64 and Riscv. Otherwise there will
be compiling error such as:
linux-headers/asm/unistd.h:3:10: fatal error: asm/unistd_64.h: No such file or directory
#include <asm/unistd_64.h>
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Acked-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20241028023809.1554405-2-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
Right now QEMU is importing arch/x86/include/uapi/asm/kvm_para.h
because it includes definitions for kvmclock and for KVM CPUID
bits. However, other definitions for KVM hypercall values and return
codes are included in include/uapi/linux/kvm_para.h and they will be
used by SEV-SNP.
To ensure that it is possible to include both <linux/kvm_para.h> and
"standard-headers/asm-x86/kvm_para.h" without conflicts, provide
linux/kvm_para.h as a portable header too, and forward linux-headers/
files to those in include/standard-headers. Note that <linux/kvm_para.h>
will include architecture-specific definitions as well, but
"standard-headers/linux/kvm_para.h" will not because it can be used in
architecture-independent files.
This could easily be extended to other architectures, but right now
they do not need any symbol in their specific kvm_para.h files.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Linux has <misc/pvpanic.h>, not <linux/pvpanic.h>. Use the same
directory for QEMU's include/standard-headers/ copy.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Afer commit 3efc75ad9d ("scripts/update-linux-headers.sh: Remove
temporary directory inbetween", 2024-05-29), updating linux-headers/
results in errors such as
cp: cannot stat '/tmp/tmp.1A1Eejh1UE/headers/include/asm/bitsperlong.h': No such file or directory
because Loongarch does not have an asm/bitsperlong.h file and uses the
generic version. Before commit 3efc75ad9d, the missing file would
incorrectly cause stale files to be included in linux-headers/. The files
were never committed to qemu.git, but were wrong nevertheless. The build
would just use the system version of the files, which is opposite to
the idea of importing Linux header files into QEMU's tree.
Create forwarding headers, resembling the ones that are generated during a
kernel build by scripts/Makefile.asm-generic, if a file is only installed
under include/asm-generic/.
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When running the update-linx-headers.sh script, it currently fails with:
scripts/update-linux-headers.sh: line 73: .../qemu/standard-headers/asm-x86/setup_data.h: No such file or directory
The "include" folder is obviously missing here - no clue how this could
have worked before?
Fixes: 66210a1a30 ("scripts/update-linux-headers: Add setup_data.h to import list")
Message-ID: <20240527060126.12578-1-thuth@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
We are reusing the same temporary directory for installing the headers
of all targets, so there could be stale files here when switching from
one target to another. Make sure to delete the folder before installing
a new set of target headers into it.
Message-ID: <20240527060243.12647-1-thuth@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Running "install_headers" in the Linux source tree is fairly
unfriendly as out-of-tree builds will start complaining about the
kernel source being non-pristine. As we have a temporary directory for
the install we should also do the build step here. So now we have:
$tmpdir/
$blddir/
$hdrdir/
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240514174253.694591-3-alex.bennee@linaro.org>
The whole RDMA subsystem was deprecated in commit e9a54265f5
("hw/rdma: Deprecate the pvrdma device and the rdma subsystem")
released in v8.2.
Remove:
- PVRDMA device
- generated vmw_pvrdma/ directory from linux-headers
- rdmacm-mux tool from contrib/
Cc: Yuval Shaia <yuval.shaia.ml@gmail.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20240328130255.52257-2-philmd@linaro.org>
Data structures like struct setup_data have been moved to a separate
setup_data.h header which bootparam.h relies on. Add setup_data.h to
the cp_portable() list and sync it along with the other header files.
Note that currently struct setup_data is stripped away as part of
generating bootparam.h, but that handling is no currently needed for
setup_data.h since it doesn't pull in many external
headers/dependencies. However, QEMU currently redefines struct
setup_data in hw/i386/x86.c, so that will need to be removed as part of
any header update that pulls in the new setup_data.h to avoid build
bisect breakage.
Because <asm/setup_data.h> is the first architecture specific #include
in include/standard-headers/, add a new sed substitution to rewrite
asm/ include to the standard-headers/asm-* subdirectory for the current
architecture.
And while at it, remove asm-generic/kvm_para.h from the list of
allowed includes: it does not have a matching substitution, and therefore
it would not be possible to use it on non-Linux systems where there is
no /usr/include/asm-generic/ directory.
Signed-off-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM vector support for RISC-V requires the linux-header ptrace.h.
Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20231218204321.75757-3-dbarboza@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Update the script to import iommufd.h
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
Add <linux/memfd.h>, used by hw/display/virtio-gpu-udmabuf.c
Add <linux/nvme_ioctl.h>, used by qga/commands-posix.c
Add <linux/const.h> used by kvm-all.c, which requires
the _BITUL() macro definition to be available.
Without these, QEMU will not compile on Debian 10 systems.
Signed-off-by: David 'Digit' Turner <digit@google.com>
Message-Id: <20230405172109.3081788-3-digit@google.com>
[Add <linux/stddef.h> for __DECLARE_FLEX_ARRAY. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This adds vduse header to linux headers so that the
relevant VDUSE API can be used in subsequent patches.
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20220523084611.91-5-xieyongji@bytedance.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Since 2020, linux kernel started to export pvpanic.h. Import the
latest version from linux into QEMU.
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20220221122717.1371010-1-pizhenwei@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
If you don't know it, it's hard to figure out the difference between
the linux-headers folder and the include/standard-headers folder.
So let's add a short explanation to clarify the difference.
Suggested-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
This adds udmabuf header to standard headers so that the
relevant udmabuf objects can be accessed in subsequent
patches.
Based-on-patch-by: Gerd Hoffmann <kraxel@redhat.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
Message-Id: <20210526231429.1045476-3-vivek.kasireddy@intel.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
The pvrdma code relies on the pvrdma_ring.h kernel header for some
basic ring buffer handling. The content of that header isn't very
exciting, but contains some (q)atomic_*() invocations that (a)
cause manual massaging when doing a headers update, and (b) are
an indication that we probably should not be importing that header
at all.
Let's reimplement the ring buffer handling directly in the pvrdma
code instead. This arguably also improves readability of the code.
Importing the header can now be dropped.
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Yuval Shaia <yuval.shaia.ml@gmail.com>
Tested-by: Yuval Shaia <yuval.shaia.ml@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Kernel commit a85cbe6159ff ("uapi: move constants from
<linux/kernel.h> to <linux/const.h>") breaks our script
because of the unrecognized include. Let's add that to
our processing.
Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210104202057.48048-2-farman@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
vfio_zdev.h is used by s390x zPCI support to pass device-specific
CLP information between host and userspace.
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Acked-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Update scripts/update-linux-headers.sh to add fuse.h and
use it to pull in fuse.h from the kernel; from v5.5-rc1
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Add linux/mman.h,asm/mman.h,asm/mman-common.h to linux-headers,
So we can use more mmap2 flags.
Signed-off-by: Zhang Yi <yi.z.zhang@linux.intel.com>
Message-Id: <f65c78d74859f815aa9c4f97407eb33361a6672c.1549555521.git.yi.z.zhang@linux.intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
it's from v4.20-rc5.
CC: Stefano Garzarella <sgarzare@redhat.com>
CC: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
There are three new indirect inclusions: vhost_types.h, which we'll
shortly put to use as a portable header and thus is copied to
standard-headers; and new per-subtarget versions of MIPS unistd.h
and PowerPC unistd.h.
Because vhost.h includes vhost_types.h, we also need a proxy include
from linux/vhost.h to standard-headers.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
The kernel has changed its license documentation, so instead of COPYING
being a stand-alone file that defines the license, it refers to various
other files under LICENSES/. This means we need to copy not just COPYING
but also these other files to our copy of the kernel headers.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180525132755.21839-4-peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
We'll currently replace any 'u64' with a 'uint64_t' including when
it's embedded in an '__aligned_u64', creating a '__aligned_uint64_t'
which doesn't exist. We need to instead expand out the kernel's
definition of __aligned_u64:
#define __aligned_u64 __u64 __attribute__((aligned(8)))
before we convert the __u64 to uint64_t.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180525132755.21839-3-peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Rework the update script slightly, add the unistd.h header and its
dependencies on all architectures.
This also removes the IA64 and MIPS from a KVM blacklist:
Linux dropped IA64, and there was never a reason to
exclude MIPS from kvm specifically - it was
excluded due to dependency of its unistd.h on sgidefs.h,
which we also import.
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
It turns out (as will be clear from follow-up patches)
we do not really need any kvm para macros host side
for now, except on x86, and there we need it
unconditionally whether we run on kvm or we don't.
Import the x86 asm/kvm_para.h into standard-headers,
follow-up patches remove a bunch of code using this.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
As of mainline linux commit 5a485803221777013944cbd1a7cd5c62efba3ffa
"x86/hyper-v: move hyperv.h out of uapi" by Vitaly Kuznetsov, no linux
uapi header includes it, so we no longer need to create a stub for it.
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20180413143354.17614-1-rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
A subsequent patch to add support for setting linkspeed/duplex in
virtio-net, requires a few definitions from ethtool.h, which ends up
pulling in kernel.h and sysinfo.h as well.
Signed-off-by: Jason Baron <jbaron@akamai.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: virtio-dev@lists.oasis-open.org
So we can use the drm fourcc codes without a dependency on libdrm-devel.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
The header file provide the ioctl command and structure to communicate
with /dev/sev device.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Note that VIRTIO_GPU_CAPSET_VIRGL2 was added manually so it has to be added
manually after re-running scripts/update-linux-headers.sh.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Modify the script to import the headers used by the pvrdma device.
Part of them are interfaces between the guest driver and the device,
import them under include/standart-headers/drivers/infiniband/... .
Remove the unused functions from pvrdma_verbs.h avoiding the
unnecessary import of several infiniband/networking/other headers.
Reviewed-by: Gal Hammer <ghammer@redhat.com>
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
We no longer support the old s390 transport, neither does the newest
Linux kernel. Remove it from the linux header script as well as the
s390x virtio code. We still should handle the VIRTIO_NOTIFY hypercall,
to tolerate early printk on older guest kernels without an sclp console.
We continue to ignore these events.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <20171115154223.109991-1-borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
The minus sign after << causes the shell to strip only
preceding tabs, not spaces.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20171110090354.29608-1-kraxel@redhat.com>
Fixes: 40bf8e9aed
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Tested-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
All definitions related to Hyper-V emulation are now taken from the QEMU
own header, so the one imported from the kernel is no longer needed.
Unfortunately it's included by kvm_para.h.
So, until this is fixed in the kernel, teach the header harvesting
script to substitute kernel's hyperv.h with a dummy.
Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20170713201522.13765-3-rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The linux-headers/asm-arm/unistd.h file has been split in three
sub-files, copy them along. However, building them requires
setting ARCH rather than SRCARCH.
SRCARCH defaults to $(ARCH) anyway; to avoid future occurrence of
the same problem use ARCH for all architectures where SRCARCH=ARCH.
Currently these are all except x86, sparc, sh and tile.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 20170221122920.16245-2-pbonzini@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
In 4.10, Linux is switching from __bitwise__ to use __bitwise
exclusively. Update our script accordingly.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This fixes these warnings from shellcheck:
^-- SC2006: Use $(..) instead of deprecated `..`
Update also a comment using the same pattern.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
We have a fake linux/types.h which we create in update-linux-headers.h.
Now that every QEMU source file includes osdep.h, this fake header
doesn't need to include anything at all.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-id: 1456237112-32662-4-git-send-email-peter.maydell@linaro.org
userfailtfd.h is used by post-copy migration so include it to
the update-linux-headers.sh as we want it updated altogether with
other kernel headers.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Message-Id: <1455512381-15271-1-git-send-email-aik@ozlabs.ru>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
New syscalls are not yet widely distributed. Add them to qemu
linux-headers include directory. Update based on v4.3-rc3 kernel headers.
Exclude mips for now, which is more problematic due to extra header
inclusion and probably unnecessary here.
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Thibaut Collet <thibaut.collet@6wind.com>
The next commit will compile hw/input/virtio-input.c and
hw/input/virtio-input-hid.c even when CONFIG_LINUX is off. These
files include both "include/standard-headers/linux/input.h" and
<windows.h> then. Doesn't work, because both define SW_MAX. We don't
actually use it. Patch input.h to define SW_MAX_ instead.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1444320700-26260-2-git-send-email-armbru@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
David Woodhouse
Bibo Mao
Paolo Bonzini
Thomas Huth
Alex Bennée
Philippe Mathieu-Daudé
Michael Roth
Daniel Henrique Barboza
Eric Auger
David 'Digit' Turner
Xie Yongji
zhenwei pi
Peter Maydell
Vivek Kasireddy
Cornelia Huck
Eric Farman
Matthew Rosato
Dr. David Alan Gilbert
Zhang Yi
Li Zhijian
Marc-André Lureau
Michael S. Tsirkin
Roman Kagan
Jason Baron
Gerd Hoffmann
Brijesh Singh
Marcel Apfelbaum
Christian Borntraeger
Cornelia Huck
Stefan Weil
Alexey Kardashevskiy
Markus Armbruster