3:49 a.m.
https://bugzilla.redhat.com/show_bug.cgi?id=1852311
Since v1:
- dropped virQEMUCapsCacheLookupByArch since after patch 1 there was no further
usage
- dropped virQEMUCapsCompareArch since virQEMUCapsCacheLookupByArch was the only
caller
pipeline: https://gitlab.com/eskultety/libvirt/-/pipelines/164239584
Erik Skultety (2):
qemu: Use virQEMUCapsCacheLookupDefault instead of lookup by arch
qemu: capabilities: Drop the virQEMUCapsCacheLookupByArch function
src/qemu/qemu_capabilities.c | 63 ------------------------------------
src/qemu/qemu_capabilities.h | 2 --
src/qemu/qemu_driver.c | 6 ++--
3 files changed, 4 insertions(+), 67 deletions(-)
--
2.26.2
3:49 a.m.
New subject: [libvirt PATCH v2 1/2] qemu: Use virQEMUCapsCacheLookupDefault instead of lookup by arch
Firstly, SEV is present only on AMD, so we can safely assume x86.
Secondly, the problem with looking up capabilities in the cache by arch
is that it's using virHashSearch with a callback to find the right
capabilities and get the binary name from it as well, but since the
cache is empty, it will return NULL and we won't get the corresponding
binary name out of the lookup either. Then, during the cache validation
we try to create a new cache entry for the emulator, but since we don't
have the binary name, nothing gets created.
Therefore, virQEMUCapsCacheLookupDefault is used to fix this issue,
because it doesn't rely on the capabilities cache to construct the
emulator binary name.
https://bugzilla.redhat.com/show_bug.cgi?id=1852311
Signed-off-by: Erik Skultety <eskultet(a)redhat.com>
---
src/qemu/qemu_driver.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index a5b38b3d24..cd8d7ffb56 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -22823,8 +22823,10 @@ qemuNodeGetSEVInfo(virConnectPtr conn,
if (virNodeGetSevInfoEnsureACL(conn) < 0)
return -1;
- qemucaps = virQEMUCapsCacheLookupByArch(driver->qemuCapsCache,
- virArchFromHost());
+ qemucaps = virQEMUCapsCacheLookupDefault(driver->qemuCapsCache,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL, NULL);
+
if (!qemucaps)
return -1;
--
2.26.2
3:49 a.m.
New subject: [libvirt PATCH v2 2/2] qemu: capabilities: Drop the virQEMUCapsCacheLookupByArch function
Previous commit removed the last usage of the function. Drop
virQEMUCapsCompareArch as well since virQEMUCapsCacheLookupByArch was
its only caller.
Signed-off-by: Erik Skultety <eskultet(a)redhat.com>
---
src/qemu/qemu_capabilities.c | 63 ------------------------------------
src/qemu/qemu_capabilities.h | 2 --
2 files changed, 65 deletions(-)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index efc42aac17..25a0b36940 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -5668,69 +5668,6 @@ virQEMUCapsCacheLookupCopy(virFileCachePtr cache,
}
-static int
-virQEMUCapsCompareArch(const void *payload,
- const void *name G_GNUC_UNUSED,
- const void *opaque)
-{
- struct virQEMUCapsSearchData *data = (struct virQEMUCapsSearchData *)opaque;
- const virQEMUCaps *qemuCaps = payload;
-
- if (qemuCaps->arch != data->arch)
- return false;
-
- if (data->binaryFilter &&
- !strstr(qemuCaps->binary, data->binaryFilter)) {
- return false;
- }
-
- return true;
-}
-
-
-virQEMUCapsPtr
-virQEMUCapsCacheLookupByArch(virFileCachePtr cache,
- virArch arch)
-{
- virQEMUCapsCachePrivPtr priv = virFileCacheGetPriv(cache);
- virQEMUCapsPtr ret = NULL;
- const char *binaryFilters[] = {
- "qemu-system-",
- NULL,
- };
- virArch archs[] = {
- arch,
- virQEMUCapsFindTarget(virArchFromHost(), arch),
- };
- size_t i;
- size_t j;
-
- priv->microcodeVersion = virHostCPUGetMicrocodeVersion();
-
- for (i = 0; i < G_N_ELEMENTS(binaryFilters); i++) {
- for (j = 0; j < G_N_ELEMENTS(archs); j++) {
- struct virQEMUCapsSearchData data = {
- .arch = archs[j],
- .binaryFilter = binaryFilters[i],
- };
-
- ret = virFileCacheLookupByFunc(cache, virQEMUCapsCompareArch, &data);
- if (ret)
- goto done;
- }
- }
-
- virReportError(VIR_ERR_INVALID_ARG,
- _("unable to find any emulator to serve '%s' "
- "architecture"), virArchToString(arch));
-
- done:
- VIR_DEBUG("Returning caps %p for arch %s", ret, virArchToString(arch));
-
- return ret;
-}
-
-
/**
* virQEMUCapsCacheLookupDefault:
* @cache: QEMU capabilities cache
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index 3e585d1229..9834fc2a52 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -703,8 +703,6 @@ virQEMUCapsPtr virQEMUCapsCacheLookupCopy(virFileCachePtr cache,
virDomainVirtType virtType,
const char *binary,
const char *machineType);
-virQEMUCapsPtr virQEMUCapsCacheLookupByArch(virFileCachePtr cache,
- virArch arch);
virQEMUCapsPtr virQEMUCapsCacheLookupDefault(virFileCachePtr cache,
const char *binary,
const char *archStr,
--
2.26.2
3:51 a.m.
On Wed, Jul 08, 2020 at 10:49:29AM +0200, Erik Skultety wrote:
https://bugzilla.redhat.com/show_bug.cgi?id=1852311
Since v1:
- dropped virQEMUCapsCacheLookupByArch since after patch 1 there was no further
usage
- dropped virQEMUCapsCompareArch since virQEMUCapsCacheLookupByArch was the only
caller
pipeline: https://gitlab.com/eskultety/libvirt/-/pipelines/164239584
Erik Skultety (2):
qemu: Use virQEMUCapsCacheLookupDefault instead of lookup by arch
qemu: capabilities: Drop the virQEMUCapsCacheLookupByArch function
src/qemu/qemu_capabilities.c | 63 ------------------------------------
src/qemu/qemu_capabilities.h | 2 --
src/qemu/qemu_driver.c | 6 ++--
3 files changed, 4 insertions(+), 67 deletions(-)
Reviewed-by: Daniel P. Berrangé <berrange(a)redhat.com>
Regards,
Daniel
--
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