| Message ID | 20200924091406.1321012-1-imammedo@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | numa: hmat: require parent cache description before the next level one | expand |
On Thu, Sep 24, 2020 at 05:14:06AM -0400, Igor Mammedov wrote: > Spec[1] defines 0 - 3 level memory side cache, however QEMU > CLI allows to specify an intermediate cache level without > specifying previous level. Such option(s) silently ignored > when building HMAT table, which leads to incomplete cache > information. > Make sure that previous level exists and error out > if it hasn't been provided. > > 1) ACPI 6.2A 5.2.27.5 Memory Side Cache Information Structure > > Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1842877 > Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Queueing on machine-next, thanks!
diff --git a/hw/core/numa.c b/hw/core/numa.c index f9593ec716..8282e0b2e6 100644 --- a/hw/core/numa.c +++ b/hw/core/numa.c @@ -424,7 +424,13 @@ void parse_numa_hmat_cache(MachineState *ms, NumaHmatCacheOptions *node, } if ((node->level > 1) && - ms->numa_state->hmat_cache[node->node_id][node->level - 1] && + ms->numa_state->hmat_cache[node->node_id][node->level - 1] == NULL) { + error_setg(errp, "Cache level=%" PRIu8 " shall be defined first", + node->level - 1); + return; + } + + if ((node->level > 1) && (node->size <= ms->numa_state->hmat_cache[node->node_id][node->level - 1]->size)) { error_setg(errp, "Invalid size=%" PRIu64 ", the size of level=%" PRIu8
Spec[1] defines 0 - 3 level memory side cache, however QEMU CLI allows to specify an intermediate cache level without specifying previous level. Such option(s) silently ignored when building HMAT table, which leads to incomplete cache information. Make sure that previous level exists and error out if it hasn't been provided. 1) ACPI 6.2A 5.2.27.5 Memory Side Cache Information Structure Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1842877 Signed-off-by: Igor Mammedov <imammedo@redhat.com> --- hw/core/numa.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)