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qemu_domain.c: do not auto-align ppc64 NVDIMMs

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We don't need the auto-alignment now that the user is handling
it by hand.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Daniel Henrique Barboza 2020-07-30 16:48:02 -03:00 committed by Michal Privoznik
parent 0ccceaa57c
commit 07de813924
1 changed files with 4 additions and 47 deletions
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51
src/qemu/qemu_domain.c
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@ -8054,44 +8054,6 @@ qemuDomainGetMemoryModuleSizeAlignment(const virDomainDef *def,
}
static int
qemuDomainNVDimmAlignSizePseries(virDomainDefPtr def,
virDomainMemoryDefPtr mem)
{
/* For NVDIMMs in ppc64 in we want to align down the guest
* visible space, instead of align up, to avoid writing
* beyond the end of file by adding a potential 256MiB
* to the user specified size.
*
* The label-size is mandatory for ppc64 as well, meaning that
* the guest visible space will be target_size-label_size.
*
* Finally, target_size must include label_size.
*
* The above can be summed up as follows:
*
* target_size = AlignDown(target_size - label_size) + label_size
*/
unsigned long long ppc64AlignSize = qemuDomainGetMemorySizeAlignment(def);
unsigned long long guestArea = mem->size - mem->labelsize;
/* Align down guest_area. 256MiB is the minimum size. Error
* out if target_size is smaller than 256MiB + label_size,
* since aligning it up will cause QEMU errors. */
if (mem->size < (ppc64AlignSize + mem->labelsize)) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("minimum target size for the NVDIMM "
"must be 256MB plus the label size"));
return -1;
}
guestArea = (guestArea/ppc64AlignSize) * ppc64AlignSize;
mem->size = guestArea + mem->labelsize;
return 0;
}
int
qemuDomainAlignMemorySizes(virDomainDefPtr def)
{
@ -8138,11 +8100,8 @@ qemuDomainAlignMemorySizes(virDomainDefPtr def)
/* Align memory module sizes */
for (i = 0; i < def->nmems; i++) {
if (def->mems[i]->model == VIR_DOMAIN_MEMORY_MODEL_NVDIMM &&
ARCH_IS_PPC64(def->os.arch)) {
if (qemuDomainNVDimmAlignSizePseries(def, def->mems[i]) < 0)
return -1;
} else {
if (!(def->mems[i]->model == VIR_DOMAIN_MEMORY_MODEL_NVDIMM &&
ARCH_IS_PPC64(def->os.arch))) {
align = qemuDomainGetMemoryModuleSizeAlignment(def, def->mems[i]);
def->mems[i]->size = VIR_ROUND_UP(def->mems[i]->size, align);
}
@ -8175,10 +8134,8 @@ int
qemuDomainMemoryDeviceAlignSize(virDomainDefPtr def,
virDomainMemoryDefPtr mem)
{
if (mem->model == VIR_DOMAIN_MEMORY_MODEL_NVDIMM &&
ARCH_IS_PPC64(def->os.arch)) {
return qemuDomainNVDimmAlignSizePseries(def, mem);
} else {
if (!(mem->model == VIR_DOMAIN_MEMORY_MODEL_NVDIMM &&
ARCH_IS_PPC64(def->os.arch))) {
mem->size = VIR_ROUND_UP(mem->size,
qemuDomainGetMemorySizeAlignment(def));
}