For backward compatibility with older versions of libvirt CPU models in
our CPU map are mostly immutable. We only changed them in a few specific
cases after showing it was safe. Sometimes QEMU developers realize a
specific feature should not be part of a particular (or any) CPU model
because it can never be enabled automatically without further
configuration. But we couldn't follow them because doing so would break
migration to older libvirt.
If QEMU drops feature F from CPU model M because F could not be enabled
automatically anyway, asking for M would never enable F. Even with older
QEMU versions. Naively removing F from libvirt's definition of M would
seem to work nicely on a single host. Libvirt would consider M to be
compatible with hosts CPU that do not support F. However, trying to
migrate domains using M without explicitly enabling or disabling F could
fail, because older libvirt would think F was enabled (it is part of M
there), but QEMU reports it as disabled once started.
Thus we can remove such feature from a libvirt's CPU model, but we have
to make sure any CPU definition using the affected model will always
explicitly mention the state of the removed feature.
https://bugzilla.redhat.com/show_bug.cgi?id=1798004
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Tim Wiederhake <twiederh@redhat.com>
The patch adds a new attribute for the 'feature' element in CPU model
specification to indicate that a given feature was removed from a CPU
model. In other words, older versions of libvirt would consider such
feature to be included in the CPU model.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Tim Wiederhake <twiederh@redhat.com>
This is just a preparation for adding new functionality to
virCPUx86Update.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Tim Wiederhake <twiederh@redhat.com>
Until now, the function returned immediately when the guest CPU
definition did not use optional features or minimum match. Clearly,
there's nothing to be updated according to the host CPU in this case,
but the arch specific code may still want to do some compatibility
updates based on the model and features used in the guest CPU
definition.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Tim Wiederhake <twiederh@redhat.com>
Function to compare CPU on 64-bits PowerPC is ignoring the flag to avoid failure
in case of CPUs (host and guest) are incompatible. Basically, the function is
returning -1 even if it is set to continue.
Signed-off-by: Julio Faracco <jcfaracco@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
This adds a new value to virConnectCompareCPUFlags,
"VIR_CONNECT_CPU_VALIDATE_XML", that governs XML document validation in
virCPUDefParseXML.
In src/conf/cpu_conf.c, include configmake.h for PKGDATADIR and
virfile.h for virFileFindResource.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Modify virCPUarmCompare in cpu_arm.c to perform compare action.
This patch only adds host to host CPU compare, the rest cases
remains the same. This is useful for source and destination host
compare during migrations to avoid migration between different
CPU models that have different CPU freatures.
Signed-off-by: Zhenyu Zheng <zheng.zhenyu@outlook.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Note the use of g_clear_pointer(..., g_free) in ppc64DataClear and virCPUx86Baseline.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
The call to `g_strfreev` is not required, as in both cases no memory has been allocated.
Signed-off-by: Tim Wiederhake <twiederh@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Using g_autoptr() in virCPUDef pointers allows for more
cleanups in ppc64Compute() and virCPUppc64Baseline()
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
This allows for a label removal in ppc64ModelParse().
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
We don't need to call virCPUppc64DataFree() in a cleanup label.
This function is already assigned to the 'dataFree' interface
of cpuDriverPPC64, and it will be called by virCPUDataFree(), the
autocleanup function of virCPUDataPtr, via driver->dataFree.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Use autocleanup with virCPUppc64MapPtr to simplify existing
code. Remove labels when possible.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Next patch will use g_autoptr() in virCPUppc64MapPtr pointers
for some cleanups.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Introduce virCPUppc64Map and virCPUppc64MapPtr types to
improve code readability.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Use autocleanup with virCPUppc64ModelPtr to simplify existing
code. Remove the 'error' label in ppc64ModelCopy() since it is
now obsolete.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Next patch will use g_autoptr() in virCPUppc64ModelPtr pointers
for some cleanups.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Introduce virCPUppc64Model and virCPUppc64ModelPtr types to
improve code readability.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Use g_autoptr() in virCPUppc64VendorPtr and remove the now
uneeded 'cleanup' label.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Next patch will use g_autoptr() in virCPUppc64VendorPtr pointers
for some cleanups.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Introduce virCPUppc64Vendor and virCPUppc64VendorPtr types to
improve code readability.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Currently, we are mixing: #if HAVE_BLAH with #if WITH_BLAH.
Things got way better with Pavel's work on meson, but apparently,
mixing these two lead to confusing and easy to miss bugs (see
31fb929eca for instance). While we were forced to use HAVE_
prefix with autotools, we are free to chose our own prefix with
meson and since WITH_ prefix appears to be more popular let's use
it everywhere.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Non-x86 archs does not have a 'microcode' version like x86. This is
covered already inside the function - just return 0 if no microcode
is found. Regardless of that, a read of /proc/cpuinfo is always made.
Each read will invoke the kernel to fill in the CPU details every time.
Now let's consider a non-x86 host, like a Power 9 server with 128 CPUs.
Each /proc/cpuinfo read will need to fetch data for each CPU and it
won't even matter because we know beforehand that PowerPC chips don't
have microcode information.
We can do better for non-x86 hosts by skipping this process entirely.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Since the macro no longer includes the 'ignore_value'
statement, stop putting another empty statement after it.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Both accept a NULL value gracefully and virStringFreeList
does not zero the pointer afterwards, so a straight replace
is safe.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Martin Kletzander <mkletzan@redhat.com>
- Add a check for asm/hwcap.h header presence,
- Add a check for getauxval() function that is used
on Linux, and for elf_aux_info() which is a FreeBSD
equivalent.
This is based on a patch submitted by Mikael Urankar in
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=247722.
Signed-off-by: Roman Bogorodskiy <bogorodskiy@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This is convenience macro, use it more. This commit was generated
using the following spatch:
@@
symbol node;
identifier old;
identifier ctxt;
type xmlNodePtr;
@@
- xmlNodePtr old;
+ VIR_XPATH_NODE_AUTORESTORE(ctxt);
...
- old = ctxt->node;
... when != old
- ctxt->node = old;
@@
symbol node;
identifier old;
identifier ctxt;
type xmlNodePtr;
@@
- xmlNodePtr old = ctxt->node;
+ VIR_XPATH_NODE_AUTORESTORE(ctxt);
... when != old
- ctxt->node = old;
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Introduce getHost support for ARM CPU driver,
read CPU vendor_id, part_id and flags from
registers directly. These codes will only be
compiled on aarch64 hardware.
Signed-off-by: Zhenyu Zheng <zheng.zhenyu@outlook.com>
Message-Id: <TY2PR01MB311380AFE294266B4E87B85699BF0@TY2PR01MB3113.jpnprd01.prod.outlook.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Add helper functions to parse vendor and model for
ARM CPUs, and use them as callbacks when load cpu
maps.
Signed-off-by: Zhenyu Zheng <zheng.zhenyu@outlook.com>
Message-Id: <TY2PR01MB3113C158B8C2822E75DB5EAE99BF0@TY2PR01MB3113.jpnprd01.prod.outlook.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Introduce virCPUarmData to virCPUData and related
structs to cpu_arm.c for ARM cpus.
Signed-off-by: Zhenyu Zheng <zheng.zhenyu@outlook.com>
Message-Id: <TY2PR01MB31130D12A95144FF88C1E32499BF0@TY2PR01MB3113.jpnprd01.prod.outlook.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
