From de97ff4a01008ad98f7d69adc4b84843fff3ce19 Mon Sep 17 00:00:00 2001
From: Keqian Zhu <zhukeqian1@huawei.com>
Date: Fri, 10 Apr 2020 10:59:55 +0800
Subject: [PATCH] intc/gicv3_cpuif: Factor out gicv3_init_one_cpuif

The CPU object of hotplugged CPU will be defer-created (during
hotplug session), so we must factor out some code to let it can
be applied to individual CPU.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
---
 hw/intc/arm_gicv3.c       |   5 +-
 hw/intc/arm_gicv3_cpuif.c | 122 ++++++++++++++++++--------------------
 hw/intc/gicv3_internal.h  |   2 +-
 3 files changed, 64 insertions(+), 65 deletions(-)

diff --git a/hw/intc/arm_gicv3.c b/hw/intc/arm_gicv3.c
index 66eaa97198..2fe79f794d 100644
--- a/hw/intc/arm_gicv3.c
+++ b/hw/intc/arm_gicv3.c
@@ -367,6 +367,7 @@ static void arm_gic_realize(DeviceState *dev, Error **errp)
     GICv3State *s = ARM_GICV3(dev);
     ARMGICv3Class *agc = ARM_GICV3_GET_CLASS(s);
     Error *local_err = NULL;
+    int i;
 
     agc->parent_realize(dev, &local_err);
     if (local_err) {
@@ -386,7 +387,9 @@ static void arm_gic_realize(DeviceState *dev, Error **errp)
         return;
     }
 
-    gicv3_init_cpuif(s);
+    for (i = 0; i < s->num_cpu; i++) {
+        gicv3_init_one_cpuif(s, i);
+    }
 }
 
 static void arm_gicv3_class_init(ObjectClass *klass, void *data)
diff --git a/hw/intc/arm_gicv3_cpuif.c b/hw/intc/arm_gicv3_cpuif.c
index 3b212d91c8..56aa5efede 100644
--- a/hw/intc/arm_gicv3_cpuif.c
+++ b/hw/intc/arm_gicv3_cpuif.c
@@ -2597,78 +2597,74 @@ static void gicv3_cpuif_el_change_hook(ARMCPU *cpu, void *opaque)
     gicv3_cpuif_update(cs);
 }
 
-void gicv3_init_cpuif(GICv3State *s)
+void gicv3_init_one_cpuif(GICv3State *s, int ncpu)
 {
     /* Called from the GICv3 realize function; register our system
      * registers with the CPU
      */
-    int i;
-
-    for (i = 0; i < s->num_cpu; i++) {
-        ARMCPU *cpu = ARM_CPU(qemu_get_cpu(i));
-        GICv3CPUState *cs = &s->cpu[i];
-
-        /* Note that we can't just use the GICv3CPUState as an opaque pointer
-         * in define_arm_cp_regs_with_opaque(), because when we're called back
-         * it might be with code translated by CPU 0 but run by CPU 1, in
-         * which case we'd get the wrong value.
-         * So instead we define the regs with no ri->opaque info, and
-         * get back to the GICv3CPUState from the CPUARMState.
-         */
-        define_arm_cp_regs(cpu, gicv3_cpuif_reginfo);
-        if (arm_feature(&cpu->env, ARM_FEATURE_EL2)
-            && cpu->gic_num_lrs) {
-            int j;
+    ARMCPU *cpu = ARM_CPU(qemu_get_cpu(ncpu));
+    GICv3CPUState *cs = &s->cpu[ncpu];
+
+    /* Note that we can't just use the GICv3CPUState as an opaque pointer
+     * in define_arm_cp_regs_with_opaque(), because when we're called back
+     * it might be with code translated by CPU 0 but run by CPU 1, in
+     * which case we'd get the wrong value.
+     * So instead we define the regs with no ri->opaque info, and
+     * get back to the GICv3CPUState from the CPUARMState.
+     */
+    define_arm_cp_regs(cpu, gicv3_cpuif_reginfo);
+    if (arm_feature(&cpu->env, ARM_FEATURE_EL2)
+        && cpu->gic_num_lrs) {
+        int j;
 
-            cs->maintenance_irq = cpu->gicv3_maintenance_interrupt;
+        cs->maintenance_irq = cpu->gicv3_maintenance_interrupt;
 
-            cs->num_list_regs = cpu->gic_num_lrs;
-            cs->vpribits = cpu->gic_vpribits;
-            cs->vprebits = cpu->gic_vprebits;
+        cs->num_list_regs = cpu->gic_num_lrs;
+        cs->vpribits = cpu->gic_vpribits;
+        cs->vprebits = cpu->gic_vprebits;
 
-            /* Check against architectural constraints: getting these
-             * wrong would be a bug in the CPU code defining these,
-             * and the implementation relies on them holding.
-             */
-            g_assert(cs->vprebits <= cs->vpribits);
-            g_assert(cs->vprebits >= 5 && cs->vprebits <= 7);
-            g_assert(cs->vpribits >= 5 && cs->vpribits <= 8);
+        /* Check against architectural constraints: getting these
+         * wrong would be a bug in the CPU code defining these,
+         * and the implementation relies on them holding.
+         */
+        g_assert(cs->vprebits <= cs->vpribits);
+        g_assert(cs->vprebits >= 5 && cs->vprebits <= 7);
+        g_assert(cs->vpribits >= 5 && cs->vpribits <= 8);
 
-            define_arm_cp_regs(cpu, gicv3_cpuif_hcr_reginfo);
+        define_arm_cp_regs(cpu, gicv3_cpuif_hcr_reginfo);
 
-            for (j = 0; j < cs->num_list_regs; j++) {
-                /* Note that the AArch64 LRs are 64-bit; the AArch32 LRs
-                 * are split into two cp15 regs, LR (the low part, with the
-                 * same encoding as the AArch64 LR) and LRC (the high part).
-                 */
-                ARMCPRegInfo lr_regset[] = {
-                    { .name = "ICH_LRn_EL2", .state = ARM_CP_STATE_BOTH,
-                      .opc0 = 3, .opc1 = 4, .crn = 12,
-                      .crm = 12 + (j >> 3), .opc2 = j & 7,
-                      .type = ARM_CP_IO | ARM_CP_NO_RAW,
-                      .access = PL2_RW,
-                      .readfn = ich_lr_read,
-                      .writefn = ich_lr_write,
-                    },
-                    { .name = "ICH_LRCn_EL2", .state = ARM_CP_STATE_AA32,
-                      .cp = 15, .opc1 = 4, .crn = 12,
-                      .crm = 14 + (j >> 3), .opc2 = j & 7,
-                      .type = ARM_CP_IO | ARM_CP_NO_RAW,
-                      .access = PL2_RW,
-                      .readfn = ich_lr_read,
-                      .writefn = ich_lr_write,
-                    },
-                    REGINFO_SENTINEL
-                };
-                define_arm_cp_regs(cpu, lr_regset);
-            }
-            if (cs->vprebits >= 6) {
-                define_arm_cp_regs(cpu, gicv3_cpuif_ich_apxr1_reginfo);
-            }
-            if (cs->vprebits == 7) {
-                define_arm_cp_regs(cpu, gicv3_cpuif_ich_apxr23_reginfo);
-            }
+        for (j = 0; j < cs->num_list_regs; j++) {
+            /* Note that the AArch64 LRs are 64-bit; the AArch32 LRs
+             * are split into two cp15 regs, LR (the low part, with the
+             * same encoding as the AArch64 LR) and LRC (the high part).
+             */
+            ARMCPRegInfo lr_regset[] = {
+                { .name = "ICH_LRn_EL2", .state = ARM_CP_STATE_BOTH,
+                  .opc0 = 3, .opc1 = 4, .crn = 12,
+                  .crm = 12 + (j >> 3), .opc2 = j & 7,
+                  .type = ARM_CP_IO | ARM_CP_NO_RAW,
+                  .access = PL2_RW,
+                  .readfn = ich_lr_read,
+                  .writefn = ich_lr_write,
+                },
+                { .name = "ICH_LRCn_EL2", .state = ARM_CP_STATE_AA32,
+                  .cp = 15, .opc1 = 4, .crn = 12,
+                  .crm = 14 + (j >> 3), .opc2 = j & 7,
+                  .type = ARM_CP_IO | ARM_CP_NO_RAW,
+                  .access = PL2_RW,
+                  .readfn = ich_lr_read,
+                  .writefn = ich_lr_write,
+                },
+                REGINFO_SENTINEL
+            };
+            define_arm_cp_regs(cpu, lr_regset);
+        }
+        if (cs->vprebits >= 6) {
+            define_arm_cp_regs(cpu, gicv3_cpuif_ich_apxr1_reginfo);
+        }
+        if (cs->vprebits == 7) {
+            define_arm_cp_regs(cpu, gicv3_cpuif_ich_apxr23_reginfo);
         }
-        arm_register_el_change_hook(cpu, gicv3_cpuif_el_change_hook, cs);
     }
+    arm_register_el_change_hook(cpu, gicv3_cpuif_el_change_hook, cs);
 }
diff --git a/hw/intc/gicv3_internal.h b/hw/intc/gicv3_internal.h
index 05303a55c8..cfbfe8a549 100644
--- a/hw/intc/gicv3_internal.h
+++ b/hw/intc/gicv3_internal.h
@@ -297,7 +297,7 @@ MemTxResult gicv3_redist_write(void *opaque, hwaddr offset, uint64_t data,
 void gicv3_dist_set_irq(GICv3State *s, int irq, int level);
 void gicv3_redist_set_irq(GICv3CPUState *cs, int irq, int level);
 void gicv3_redist_send_sgi(GICv3CPUState *cs, int grp, int irq, bool ns);
-void gicv3_init_cpuif(GICv3State *s);
+void gicv3_init_one_cpuif(GICv3State *s, int ncpu);
 
 /**
  * gicv3_cpuif_update:
-- 
2.19.1