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authorNicholas Piggin <npiggin@gmail.com>2019-07-18 13:42:11 +1000
committerDavid Gibson <david@gibson.dropbear.id.au>2019-08-21 17:17:11 +1000
commit03ef074c04a219188bbd0094ee599bd50a0a374e (patch)
treee96518fe16ce1ce9c3b31ac13b3ebf5368e556d0 /hw/ppc/spapr.c
parent00005f222973d318a8a4d7bc7a15e251fb8cf604 (diff)
spapr: Implement dispatch tracking for tcg
Implement cpu_exec_enter/exit on ppc which calls into new methods of the same name in PPCVirtualHypervisorClass. These are used by spapr to implement the splpar VPA dispatch counter initially. Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Message-Id: <20190718034214.14948-2-npiggin@gmail.com> [dwg: Removed unnecessary CONFIG_USER_ONLY checks as suggested by gkurz] Reviewed-by: Greg Kurz <groug@kaod.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'hw/ppc/spapr.c')
-rw-r--r--hw/ppc/spapr.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 22a45c3737..08cc7c2bd6 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -4306,6 +4306,52 @@ PowerPCCPU *spapr_find_cpu(int vcpu_id)
return NULL;
}
+static void spapr_cpu_exec_enter(PPCVirtualHypervisor *vhyp, PowerPCCPU *cpu)
+{
+ SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
+
+ /* These are only called by TCG, KVM maintains dispatch state */
+
+ if (spapr_cpu->vpa_addr) {
+ CPUState *cs = CPU(cpu);
+ uint32_t dispatch;
+
+ dispatch = ldl_be_phys(cs->as,
+ spapr_cpu->vpa_addr + VPA_DISPATCH_COUNTER);
+ dispatch++;
+ if ((dispatch & 1) != 0) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "VPA: incorrect dispatch counter value for "
+ "dispatched partition %u, correcting.\n", dispatch);
+ dispatch++;
+ }
+ stl_be_phys(cs->as,
+ spapr_cpu->vpa_addr + VPA_DISPATCH_COUNTER, dispatch);
+ }
+}
+
+static void spapr_cpu_exec_exit(PPCVirtualHypervisor *vhyp, PowerPCCPU *cpu)
+{
+ SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
+
+ if (spapr_cpu->vpa_addr) {
+ CPUState *cs = CPU(cpu);
+ uint32_t dispatch;
+
+ dispatch = ldl_be_phys(cs->as,
+ spapr_cpu->vpa_addr + VPA_DISPATCH_COUNTER);
+ dispatch++;
+ if ((dispatch & 1) != 1) {
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "VPA: incorrect dispatch counter value for "
+ "preempted partition %u, correcting.\n", dispatch);
+ dispatch++;
+ }
+ stl_be_phys(cs->as,
+ spapr_cpu->vpa_addr + VPA_DISPATCH_COUNTER, dispatch);
+ }
+}
+
static void spapr_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
@@ -4362,6 +4408,8 @@ static void spapr_machine_class_init(ObjectClass *oc, void *data)
vhc->hpte_set_r = spapr_hpte_set_r;
vhc->get_pate = spapr_get_pate;
vhc->encode_hpt_for_kvm_pr = spapr_encode_hpt_for_kvm_pr;
+ vhc->cpu_exec_enter = spapr_cpu_exec_enter;
+ vhc->cpu_exec_exit = spapr_cpu_exec_exit;
xic->ics_get = spapr_ics_get;
xic->ics_resend = spapr_ics_resend;
xic->icp_get = spapr_icp_get;