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authorGreg Kurz <groug@kaod.org>2020-09-14 14:34:55 +0200
committerDavid Gibson <david@gibson.dropbear.id.au>2020-10-09 10:15:06 +1100
commit121afbe487b7b10b9fc683be16068368e1ad0f11 (patch)
tree71ef8d638a6611c6db87d9b597eb02375721f4a7 /hw/ppc/spapr_hcall.c
parenta3114923d4c5f0a2ccc8b4d74b3eebad3fb6ce5d (diff)
spapr: Get rid of cas_check_pvr() error reporting
The cas_check_pvr() function has two purposes: - finding the "best" logical PVR, ie. the most recent one supported by the guest for this CPU type - checking if the guest supports the real PVR of this CPU type, which is just an optional extra information to workaround the lack of support for "compat" mode in PR KVM This logic doesn't need error reporting, really. If we don't find a suitable logical PVR, we return the special value 0 which is definitely not a valid PVR. Let the caller decide on whether it should error out or not. This doesn't change the behavior. Signed-off-by: Greg Kurz <groug@kaod.org> Message-Id: <20200914123505.612812-6-groug@kaod.org> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'hw/ppc/spapr_hcall.c')
-rw-r--r--hw/ppc/spapr_hcall.c27
1 files changed, 12 insertions, 15 deletions
diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index c2776b6a7d..885ea60778 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -1590,12 +1590,11 @@ static target_ulong h_signal_sys_reset(PowerPCCPU *cpu,
}
}
-static uint32_t cas_check_pvr(SpaprMachineState *spapr, PowerPCCPU *cpu,
- target_ulong *addr, bool *raw_mode_supported,
- Error **errp)
+/* Returns either a logical PVR or zero if none was found */
+static uint32_t cas_check_pvr(PowerPCCPU *cpu, uint32_t max_compat,
+ target_ulong *addr, bool *raw_mode_supported)
{
bool explicit_match = false; /* Matched the CPU's real PVR */
- uint32_t max_compat = spapr->max_compat_pvr;
uint32_t best_compat = 0;
int i;
@@ -1624,14 +1623,6 @@ static uint32_t cas_check_pvr(SpaprMachineState *spapr, PowerPCCPU *cpu,
}
}
- if ((best_compat == 0) && (!explicit_match || max_compat)) {
- /* We couldn't find a suitable compatibility mode, and either
- * the guest doesn't support "raw" mode for this CPU, or raw
- * mode is disabled because a maximum compat mode is set */
- error_setg(errp, "Couldn't negotiate a suitable PVR during CAS");
- return 0;
- }
-
*raw_mode_supported = explicit_match;
/* Parsing finished */
@@ -1680,6 +1671,7 @@ target_ulong do_client_architecture_support(PowerPCCPU *cpu,
bool guest_xive;
CPUState *cs;
void *fdt;
+ uint32_t max_compat = spapr->max_compat_pvr;
/* CAS is supposed to be called early when only the boot vCPU is active. */
CPU_FOREACH(cs) {
@@ -1692,9 +1684,14 @@ target_ulong do_client_architecture_support(PowerPCCPU *cpu,
}
}
- cas_pvr = cas_check_pvr(spapr, cpu, &vec, &raw_mode_supported, &local_err);
- if (local_err) {
- error_report_err(local_err);
+ cas_pvr = cas_check_pvr(cpu, max_compat, &vec, &raw_mode_supported);
+ if (!cas_pvr && (!raw_mode_supported || max_compat)) {
+ /*
+ * We couldn't find a suitable compatibility mode, and either
+ * the guest doesn't support "raw" mode for this CPU, or "raw"
+ * mode is disabled because a maximum compat mode is set.
+ */
+ error_report("Couldn't negotiate a suitable PVR during CAS");
return H_HARDWARE;
}