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ppc: Add a return value to ppc_set_compat() and ppc_set_compat_all() 

As recommended in "qapi/error.h", indicate success / failure with a
return value. Since ppc_set_compat() is called from a VMState handler,
let's make it an int so that it propagates any negative errno returned
by kvmppc_set_compat(). Do the same for ppc_set_compat_all() for
consistency, even if it isn't called in a context where a negative errno
is required on failure.

This will allow to simplify error handling in the callers.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20200914123505.612812-3-groug@kaod.org>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Greg Kurz 2020-09-14 14:34:52 +02:00 committed by David Gibson
parent 9c4d1497e8
commit 2c82e8df4d
2 changed files with 17 additions and 13 deletions
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26
target/ppc/compat.c
View File

@ -158,7 +158,7 @@ bool ppc_type_check_compat(const char *cputype, uint32_t compat_pvr,
return pcc_compat(pcc, compat_pvr, min_compat_pvr, max_compat_pvr);
}
void ppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr, Error **errp)
int ppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr, Error **errp)
{
const CompatInfo *compat = compat_by_pvr(compat_pvr);
CPUPPCState *env = &cpu->env;
@ -169,11 +169,11 @@ void ppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr, Error **errp)
pcr = 0;
} else if (!compat) {
error_setg(errp, "Unknown compatibility PVR 0x%08"PRIx32, compat_pvr);
return;
return -EINVAL;
} else if (!ppc_check_compat(cpu, compat_pvr, 0, 0)) {
error_setg(errp, "Compatibility PVR 0x%08"PRIx32" not valid for CPU",
compat_pvr);
return;
return -EINVAL;
} else {
pcr = compat->pcr;
}
@ -185,17 +185,19 @@ void ppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr, Error **errp)
if (ret < 0) {
error_setg_errno(errp, -ret,
"Unable to set CPU compatibility mode in KVM");
return;
return ret;
}
}
cpu->compat_pvr = compat_pvr;
env->spr[SPR_PCR] = pcr & pcc->pcr_mask;
return 0;
}
typedef struct {
uint32_t compat_pvr;
Error *err;
Error **errp;
int ret;
} SetCompatState;
static void do_set_compat(CPUState *cs, run_on_cpu_data arg)
@ -203,26 +205,28 @@ static void do_set_compat(CPUState *cs, run_on_cpu_data arg)
PowerPCCPU *cpu = POWERPC_CPU(cs);
SetCompatState *s = arg.host_ptr;
ppc_set_compat(cpu, s->compat_pvr, &s->err);
s->ret = ppc_set_compat(cpu, s->compat_pvr, s->errp);
}
void ppc_set_compat_all(uint32_t compat_pvr, Error **errp)
int ppc_set_compat_all(uint32_t compat_pvr, Error **errp)
{
CPUState *cs;
CPU_FOREACH(cs) {
SetCompatState s = {
.compat_pvr = compat_pvr,
.err = NULL,
.errp = errp,
.ret = 0,
};
run_on_cpu(cs, do_set_compat, RUN_ON_CPU_HOST_PTR(&s));
if (s.err) {
error_propagate(errp, s.err);
return;
if (s.ret < 0) {
return s.ret;
}
}
return 0;
}
int ppc_compat_max_vthreads(PowerPCCPU *cpu)

4
target/ppc/cpu.h
View File

@ -1352,10 +1352,10 @@ bool ppc_check_compat(PowerPCCPU *cpu, uint32_t compat_pvr,
bool ppc_type_check_compat(const char *cputype, uint32_t compat_pvr,
uint32_t min_compat_pvr, uint32_t max_compat_pvr);
void ppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr, Error **errp);
int ppc_set_compat(PowerPCCPU *cpu, uint32_t compat_pvr, Error **errp);
#if !defined(CONFIG_USER_ONLY)
void ppc_set_compat_all(uint32_t compat_pvr, Error **errp);
int ppc_set_compat_all(uint32_t compat_pvr, Error **errp);
#endif
int ppc_compat_max_vthreads(PowerPCCPU *cpu);
void ppc_compat_add_property(Object *obj, const char *name,