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target/ppc/spapr: Add SPAPR_CAP_LARGE_DECREMENTER 

Add spapr_cap SPAPR_CAP_LARGE_DECREMENTER to be used to control the
availability of the large decrementer for a guest.

Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Message-Id: <20190301024317.22137-1-sjitindarsingh@gmail.com>
[dwg: Trivial style fix]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
master
Suraj Jitindar Singh 2019-03-01 13:43:14 +11:00 committed by David Gibson
parent c65ecfe2f3
commit c982f5cf9a
3 changed files with 24 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
hw/ppc/spapr.c
View File

@ -2088,6 +2088,7 @@ static const VMStateDescription vmstate_spapr = {
&vmstate_spapr_irq_map, &vmstate_spapr_irq_map,
&vmstate_spapr_cap_nested_kvm_hv, &vmstate_spapr_cap_nested_kvm_hv,
&vmstate_spapr_dtb, &vmstate_spapr_dtb,
&vmstate_spapr_cap_large_decr,
NULL NULL
} }
}; };
@ -4302,6 +4303,7 @@ static void spapr_machine_class_init(ObjectClass *oc, void *data)
smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN; smc->default_caps.caps[SPAPR_CAP_IBS] = SPAPR_CAP_BROKEN;
smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = 16; /* 64kiB */ smc->default_caps.caps[SPAPR_CAP_HPT_MAXPAGESIZE] = 16; /* 64kiB */
smc->default_caps.caps[SPAPR_CAP_NESTED_KVM_HV] = SPAPR_CAP_OFF; smc->default_caps.caps[SPAPR_CAP_NESTED_KVM_HV] = SPAPR_CAP_OFF;
smc->default_caps.caps[SPAPR_CAP_LARGE_DECREMENTER] = SPAPR_CAP_OFF;
spapr_caps_add_properties(smc, &error_abort); spapr_caps_add_properties(smc, &error_abort);
smc->irq = &spapr_irq_xics; smc->irq = &spapr_irq_xics;
smc->dr_phb_enabled = true; smc->dr_phb_enabled = true;

18
hw/ppc/spapr_caps.c
View File

@ -390,6 +390,14 @@ static void cap_nested_kvm_hv_apply(sPAPRMachineState *spapr,
} }
} }
static void cap_large_decr_apply(sPAPRMachineState *spapr,
uint8_t val, Error **errp)
{
if (val)
error_setg(errp,
"No large decrementer support, try cap-large-decr=off");
}
sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = { sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = {
[SPAPR_CAP_HTM] = { [SPAPR_CAP_HTM] = {
.name = "htm", .name = "htm",
@ -468,6 +476,15 @@ sPAPRCapabilityInfo capability_table[SPAPR_CAP_NUM] = {
.type = "bool", .type = "bool",
.apply = cap_nested_kvm_hv_apply, .apply = cap_nested_kvm_hv_apply,
}, },
[SPAPR_CAP_LARGE_DECREMENTER] = {
.name = "large-decr",
.description = "Allow Large Decrementer",
.index = SPAPR_CAP_LARGE_DECREMENTER,
.get = spapr_cap_get_bool,
.set = spapr_cap_set_bool,
.type = "bool",
.apply = cap_large_decr_apply,
},
}; };
static sPAPRCapabilities default_caps_with_cpu(sPAPRMachineState *spapr, static sPAPRCapabilities default_caps_with_cpu(sPAPRMachineState *spapr,
@ -596,6 +613,7 @@ SPAPR_CAP_MIG_STATE(cfpc, SPAPR_CAP_CFPC);
SPAPR_CAP_MIG_STATE(sbbc, SPAPR_CAP_SBBC); SPAPR_CAP_MIG_STATE(sbbc, SPAPR_CAP_SBBC);
SPAPR_CAP_MIG_STATE(ibs, SPAPR_CAP_IBS); SPAPR_CAP_MIG_STATE(ibs, SPAPR_CAP_IBS);
SPAPR_CAP_MIG_STATE(nested_kvm_hv, SPAPR_CAP_NESTED_KVM_HV); SPAPR_CAP_MIG_STATE(nested_kvm_hv, SPAPR_CAP_NESTED_KVM_HV);
SPAPR_CAP_MIG_STATE(large_decr, SPAPR_CAP_LARGE_DECREMENTER);
void spapr_caps_init(sPAPRMachineState *spapr) void spapr_caps_init(sPAPRMachineState *spapr)
{ {

5
include/hw/ppc/spapr.h
View File

@ -74,8 +74,10 @@ typedef enum {
#define SPAPR_CAP_HPT_MAXPAGESIZE 0x06 #define SPAPR_CAP_HPT_MAXPAGESIZE 0x06
/* Nested KVM-HV */ /* Nested KVM-HV */
#define SPAPR_CAP_NESTED_KVM_HV 0x07 #define SPAPR_CAP_NESTED_KVM_HV 0x07
/* Large Decrementer */
#define SPAPR_CAP_LARGE_DECREMENTER 0x08
/* Num Caps */ /* Num Caps */
#define SPAPR_CAP_NUM (SPAPR_CAP_NESTED_KVM_HV + 1) #define SPAPR_CAP_NUM (SPAPR_CAP_LARGE_DECREMENTER + 1)
/* /*
* Capability Values * Capability Values
@ -828,6 +830,7 @@ extern const VMStateDescription vmstate_spapr_cap_cfpc;
extern const VMStateDescription vmstate_spapr_cap_sbbc; extern const VMStateDescription vmstate_spapr_cap_sbbc;
extern const VMStateDescription vmstate_spapr_cap_ibs; extern const VMStateDescription vmstate_spapr_cap_ibs;
extern const VMStateDescription vmstate_spapr_cap_nested_kvm_hv; extern const VMStateDescription vmstate_spapr_cap_nested_kvm_hv;
extern const VMStateDescription vmstate_spapr_cap_large_decr;
static inline uint8_t spapr_get_cap(sPAPRMachineState *spapr, int cap) static inline uint8_t spapr_get_cap(sPAPRMachineState *spapr, int cap)
{ {