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x86: ich9: let firmware negotiate 'CPU hot-unplug with SMI' feature

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Keep CPU hotunplug with SMI disabled on 5.2 and older and enable
it by default on newer machine types.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Message-Id: <20201207140739.3829993-9-imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2020-12-07 09:07:39 -05:00 committed by Michael S. Tsirkin
parent cd89134e24
commit 7ed3e1ebcb
2 changed files with 10 additions and 2 deletions
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4
hw/i386/pc.c
View File

@ -97,7 +97,9 @@
#include "trace.h"
#include CONFIG_DEVICES
GlobalProperty pc_compat_5_2[] = {};
GlobalProperty pc_compat_5_2[] = {
{ "ICH9-LPC", "x-smi-cpu-hotunplug", "off" },
};
const size_t pc_compat_5_2_len = G_N_ELEMENTS(pc_compat_5_2);
GlobalProperty pc_compat_5_1[] = {

8
hw/isa/lpc_ich9.c
View File

@ -392,6 +392,12 @@ static void smi_features_ok_callback(void *opaque)
return;
}
if (guest_cpu_hotplug_features ==
BIT_ULL(ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT)) {
/* cpu hot-unplug is unsupported without cpu-hotplug */
return;
}
/* valid feature subset requested, lock it down, report success */
lpc->smi_negotiated_features = guest_features;
lpc->smi_features_ok = 1;
@ -774,7 +780,7 @@ static Property ich9_lpc_properties[] = {
DEFINE_PROP_BIT64("x-smi-cpu-hotplug", ICH9LPCState, smi_host_features,
ICH9_LPC_SMI_F_CPU_HOTPLUG_BIT, true),
DEFINE_PROP_BIT64("x-smi-cpu-hotunplug", ICH9LPCState, smi_host_features,
ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT, false),
ICH9_LPC_SMI_F_CPU_HOT_UNPLUG_BIT, true),
DEFINE_PROP_END_OF_LIST(),
};