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[Qemu-stable] [PATCH 52/54] target/ppc/spapr_caps: Add new tristate cap
From: |
Michael Roth |
Subject: |
[Qemu-stable] [PATCH 52/54] target/ppc/spapr_caps: Add new tristate cap safe_bounds_check |
Date: |
Tue, 6 Feb 2018 13:15:13 -0600 |
From: Suraj Jitindar Singh <address@hidden>
Add new tristate cap cap-sbbc to represent the speculation barrier
bounds checking capability.
Signed-off-by: Suraj Jitindar Singh <address@hidden>
Reviewed-by: David Gibson <address@hidden>
Signed-off-by: David Gibson <address@hidden>
(cherry picked from commit 09114fd8179977e4157b36aab2e3d68eaf08adca)
Signed-off-by: Michael Roth <address@hidden>
---
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 37a414ffe6..0db86a7945 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1766,6 +1766,7 @@ static const VMStateDescription vmstate_spapr = {
&vmstate_spapr_cap_vsx,
&vmstate_spapr_cap_dfp,
&vmstate_spapr_cap_cfpc,
+ &vmstate_spapr_cap_sbbc,
NULL
}
};
@@ -3711,6 +3712,7 @@ static void spapr_machine_class_init(ObjectClass *oc,
void *data)
smc->default_caps.caps[SPAPR_CAP_VSX] = SPAPR_CAP_ON;
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;
spapr_caps_add_properties(smc, &error_abort);
}
diff --git a/hw/ppc/spapr_caps.c b/hw/ppc/spapr_caps.c
index 183916895c..680cb6f0e5 100644
--- a/hw/ppc/spapr_caps.c
+++ b/hw/ppc/spapr_caps.c
@@ -192,6 +192,17 @@ static void cap_safe_cache_apply(sPAPRMachineState *spapr,
uint8_t val,
}
}
+static void cap_safe_bounds_check_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 bounds check capability level not
supported by tcg, try a different value for cap-sbbc");
+ } else if (kvm_enabled() && (val > kvmppc_get_cap_safe_bounds_check())) {
+ error_setg(errp, "Requested safe bounds check capability level not
supported by kvm, try a different value for cap-sbbc");
+ }
+}
+
#define VALUE_DESC_TRISTATE " (broken, workaround, fixed)"
sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = {
@@ -234,6 +245,15 @@ sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = {
.type = "string",
.apply = cap_safe_cache_apply,
},
+ [SPAPR_CAP_SBBC] = {
+ .name = "sbbc",
+ .description = "Speculation Barrier Bounds Checking"
VALUE_DESC_TRISTATE,
+ .index = SPAPR_CAP_SBBC,
+ .get = spapr_cap_get_tristate,
+ .set = spapr_cap_set_tristate,
+ .type = "string",
+ .apply = cap_safe_bounds_check_apply,
+ },
};
static sPAPRCapabilities default_caps_with_cpu(sPAPRMachineState *spapr,
@@ -340,6 +360,7 @@ SPAPR_CAP_MIG_STATE(htm, HTM);
SPAPR_CAP_MIG_STATE(vsx, VSX);
SPAPR_CAP_MIG_STATE(dfp, DFP);
SPAPR_CAP_MIG_STATE(cfpc, CFPC);
+SPAPR_CAP_MIG_STATE(sbbc, SBBC);
void spapr_caps_reset(sPAPRMachineState *spapr)
{
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index fdb80f2118..f272a304d3 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -62,8 +62,10 @@ typedef enum {
#define SPAPR_CAP_DFP 0x02
/* Cache Flush on Privilege Change */
#define SPAPR_CAP_CFPC 0x03
+/* Speculation Barrier Bounds Checking */
+#define SPAPR_CAP_SBBC 0x04
/* Num Caps */
-#define SPAPR_CAP_NUM (SPAPR_CAP_CFPC + 1)
+#define SPAPR_CAP_NUM (SPAPR_CAP_SBBC + 1)
/*
* Capability Values
@@ -764,6 +766,7 @@ extern const VMStateDescription vmstate_spapr_cap_htm;
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;
static inline uint8_t spapr_get_cap(sPAPRMachineState *spapr, int cap)
{
--
2.11.0
- [Qemu-stable] [PATCH 45/54] ppc: Change Power9 compat table to support at most 8 threads/core, (continued)
- [Qemu-stable] [PATCH 45/54] ppc: Change Power9 compat table to support at most 8 threads/core, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 43/54] spapr: Handle Decimal Floating Point (DFP) as an optional capability, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 49/54] target/ppc/kvm: Add cap_ppc_safe_[cache/bounds_check/indirect_branch], Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 47/54] target/ppc: introduce the PPC_BIT() macro, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 48/54] target/ppc/spapr_caps: Add macro to generate spapr_caps migration vmstate, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 46/54] spapr: fix device tree properties when using compatibility mode, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 04/54] qemu-options: Remove stray colons from output of --help, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 54/54] target/ppc/spapr: Add H-Call H_GET_CPU_CHARACTERISTICS, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 53/54] target/ppc/spapr_caps: Add new tristate cap safe_indirect_branch, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 36/54] spapr: don't initialize PATB entry if max-cpu-compat < power9, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 52/54] target/ppc/spapr_caps: Add new tristate cap safe_bounds_check,
Michael Roth <=
- [Qemu-stable] [PATCH 39/54] spapr: Treat Hardware Transactional Memory (HTM) as an optional capability, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 38/54] spapr: Capabilities infrastructure, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 40/54] spapr: Validate capabilities on migration, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 50/54] target/ppc/spapr_caps: Add support for tristate spapr_capabilities, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 51/54] target/ppc/spapr_caps: Add new tristate cap safe_cache, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 07/54] block: Make bdrv_drain_invoke() recursive, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 08/54] block: Call .drain_begin only once in bdrv_drain_all_begin(), Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 05/54] qemu-pr-helper: miscellaneous fixes, Michael Roth, 2018/02/06
- [Qemu-stable] [PATCH 06/54] block/nbd: fix segmentation fault when .desc is not null-terminated, Michael Roth, 2018/02/06
- Re: [Qemu-stable] [Qemu-devel] [PATCH 00/54] Patch Round-up for stable 2.11.1, freeze on 2018-02-12, Thomas Huth, 2018/02/07