From: Suraj Jitindar Singh <sjitindarsi...@gmail.com>
Add new tristate cap cap-ibs to represent the indirect branch
serialisation capability.
Signed-off-by: Suraj Jitindar Singh <sjitindarsi...@gmail.com>
Reviewed-by: David Gibson <da...@gibson.dropbear.id.au>
Signed-off-by: David Gibson <da...@gibson.dropbear.id.au>
(cherry picked from commit 4be8d4e7d935fc8919d61f53a0f0fb7230052bb3)
Signed-off-by: Michael Roth <mdr...@linux.vnet.ibm.com>
---
hw/ppc/spapr.c | 2 ++
hw/ppc/spapr_caps.c | 21 +++++++++++++++++++++
include/hw/ppc/spapr.h | 5 ++++-
3 files changed, 27 insertions(+), 1 deletion(-)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 0db86a7945..b57528baf4 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1767,6 +1767,7 @@ static const VMStateDescription vmstate_spapr = {
&vmstate_spapr_cap_dfp,
&vmstate_spapr_cap_cfpc,
&vmstate_spapr_cap_sbbc,
+ &vmstate_spapr_cap_ibs,
NULL
}
};
@@ -3713,6 +3714,7 @@ static void spapr_machine_class_init(ObjectClass *oc,
void *data)
smc->default_caps.caps[SPAPR_CAP_DFP] = SPAPR_CAP_ON;
smc->default_caps.caps[SPAPR_CAP_CFPC] = SPAPR_CAP_BROKEN;
smc->default_caps.caps[SPAPR_CAP_SBBC] = SPAPR_CAP_BROKEN;
+ smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN;
spapr_caps_add_properties(smc, &error_abort);
}
diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c
index 680cb6f0e5..7b229517be 100644
--- a/hw/ppc/spapr_caps.c
+++ b/hw/ppc/spapr_caps.c
@@ -203,6 +203,17 @@ static void cap_safe_bounds_check_apply(sPAPRMachineState
*spapr, uint8_t val,
}
}
+static void cap_safe_indirect_branch_apply(sPAPRMachineState *spapr,
+ uint8_t val, Error **errp)
+{
+ if (tcg_enabled() && val) {
+ /* TODO - for now only allow broken for TCG */
+ error_setg(errp, "Requested safe indirect branch capability level not
supported by tcg, try a different value for cap-ibs");
+ } else if (kvm_enabled() && (val > kvmppc_get_cap_safe_indirect_branch()))
{
+ error_setg(errp, "Requested safe indirect branch capability level not
supported by kvm, try a different value for cap-ibs");
+ }
+}
+
#define VALUE_DESC_TRISTATE " (broken, workaround, fixed)"
sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = {
@@ -254,6 +265,15 @@ sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = {
.type = "string",
.apply = cap_safe_bounds_check_apply,
},
+ [SPAPR_CAP_IBS] = {
+ .name = "ibs",
+ .description = "Indirect Branch Serialisation" VALUE_DESC_TRISTATE,
+ .index = SPAPR_CAP_IBS,
+ .get = spapr_cap_get_tristate,
+ .set = spapr_cap_set_tristate,
+ .type = "string",
+ .apply = cap_safe_indirect_branch_apply,
+ },
};
static sPAPRCapabilities default_caps_with_cpu(sPAPRMachineState *spapr,
@@ -361,6 +381,7 @@ SPAPR_CAP_MIG_STATE(vsx, VSX);
SPAPR_CAP_MIG_STATE(dfp, DFP);
SPAPR_CAP_MIG_STATE(cfpc, CFPC);
SPAPR_CAP_MIG_STATE(sbbc, SBBC);
+SPAPR_CAP_MIG_STATE(ibs, IBS);
void spapr_caps_reset(sPAPRMachineState *spapr)
{
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index f272a304d3..9e7be34d4e 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -64,8 +64,10 @@ typedef enum {
#define SPAPR_CAP_CFPC 0x03
/* Speculation Barrier Bounds Checking */
#define SPAPR_CAP_SBBC 0x04
+/* Indirect Branch Serialisation */
+#define SPAPR_CAP_IBS 0x05
/* Num Caps */
-#define SPAPR_CAP_NUM (SPAPR_CAP_SBBC + 1)
+#define SPAPR_CAP_NUM (SPAPR_CAP_IBS + 1)
/*
* Capability Values
@@ -767,6 +769,7 @@ extern const VMStateDescription vmstate_spapr_cap_vsx;
extern const VMStateDescription vmstate_spapr_cap_dfp;
extern const VMStateDescription vmstate_spapr_cap_cfpc;
extern const VMStateDescription vmstate_spapr_cap_sbbc;
+extern const VMStateDescription vmstate_spapr_cap_ibs;
static inline uint8_t spapr_get_cap(sPAPRMachineState *spapr, int cap)
{
--
2.11.0
