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qemu: Add capability for IBS pSeries feature

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IBS (Indirect Branch Speculation) is the last capability added
in QEMU 2.12 related to Spectre mitigation for Power. It was
added in commit 4be8d4e7d935.

This patch introduces it as QEMU_CAPS_MACHINE_PSERIES_CAP_IBS.
Like CFPC and SBBC, users might want to tune in IBS based on
their HW and guest OS requirements, and it's better to do it
so in a proper Libvirt feature than to put QEMU arguments
in the middle of the domain XML.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Daniel Henrique Barboza 2020-04-27 09:14:30 -03:00 committed by Michal Privoznik
parent 104dadcff6
commit 199dd6f693
8 changed files with 9 additions and 0 deletions
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2
src/qemu/qemu_capabilities.c
View File

@ -578,6 +578,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
/* 365 */
"machine.pseries.cap-sbbc",
"machine.pseries.cap-ibs",
);
@ -1623,6 +1624,7 @@ static struct virQEMUCapsStringFlags virQEMUCapsMachinePropsPSeries[] = {
{ "cap-ccf-assist", QEMU_CAPS_MACHINE_PSERIES_CAP_CCF_ASSIST },
{ "cap-cfpc", QEMU_CAPS_MACHINE_PSERIES_CAP_CFPC },
{ "cap-sbbc", QEMU_CAPS_MACHINE_PSERIES_CAP_SBBC },
{ "cap-ibs", QEMU_CAPS_MACHINE_PSERIES_CAP_IBS },
};
static struct virQEMUCapsStringFlags virQEMUCapsMachinePropsVirt[] = {

1
src/qemu/qemu_capabilities.h
View File

@ -559,6 +559,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
/* 365 */
QEMU_CAPS_MACHINE_PSERIES_CAP_SBBC, /* -machine pseries.cap-sbbc */
QEMU_CAPS_MACHINE_PSERIES_CAP_IBS, /* -machine pseries.cap-ibs */
QEMU_CAPS_LAST /* this must always be the last item */
} virQEMUCapsFlags;

1
tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
View File

@ -156,6 +156,7 @@
<flag name='i8042'/>
<flag name='machine.pseries.cap-cfpc'/>
<flag name='machine.pseries.cap-sbbc'/>
<flag name='machine.pseries.cap-ibs'/>
<version>2011090</version>
<kvmVersion>0</kvmVersion>
<microcodeVersion>42900289</microcodeVersion>

1
tests/qemucapabilitiesdata/caps_3.0.0.ppc64.xml
View File

@ -158,6 +158,7 @@
<flag name='i8042'/>
<flag name='machine.pseries.cap-cfpc'/>
<flag name='machine.pseries.cap-sbbc'/>
<flag name='machine.pseries.cap-ibs'/>
<version>2012050</version>
<kvmVersion>0</kvmVersion>
<microcodeVersion>42900239</microcodeVersion>

1
tests/qemucapabilitiesdata/caps_3.1.0.ppc64.xml
View File

@ -163,6 +163,7 @@
<flag name='storage.werror'/>
<flag name='machine.pseries.cap-cfpc'/>
<flag name='machine.pseries.cap-sbbc'/>
<flag name='machine.pseries.cap-ibs'/>
<version>3000091</version>
<kvmVersion>0</kvmVersion>
<microcodeVersion>42900240</microcodeVersion>

1
tests/qemucapabilitiesdata/caps_4.0.0.ppc64.xml
View File

@ -177,6 +177,7 @@
<flag name='storage.werror'/>
<flag name='machine.pseries.cap-cfpc'/>
<flag name='machine.pseries.cap-sbbc'/>
<flag name='machine.pseries.cap-ibs'/>
<version>4000000</version>
<kvmVersion>0</kvmVersion>
<microcodeVersion>42900240</microcodeVersion>

1
tests/qemucapabilitiesdata/caps_4.2.0.ppc64.xml
View File

@ -182,6 +182,7 @@
<flag name='storage.werror'/>
<flag name='machine.pseries.cap-cfpc'/>
<flag name='machine.pseries.cap-sbbc'/>
<flag name='machine.pseries.cap-ibs'/>
<version>4001050</version>
<kvmVersion>0</kvmVersion>
<microcodeVersion>42900242</microcodeVersion>

1
tests/qemucapabilitiesdata/caps_5.0.0.ppc64.xml
View File

@ -194,6 +194,7 @@
<flag name='virtio.packed'/>
<flag name='machine.pseries.cap-cfpc'/>
<flag name='machine.pseries.cap-sbbc'/>
<flag name='machine.pseries.cap-ibs'/>
<version>4002050</version>
<kvmVersion>0</kvmVersion>
<microcodeVersion>42900241</microcodeVersion>