hw/intc/arm_gicv3_its: Implement VINVALL

The VINVALL command should cause any cached information in the
ITS or redistributor for the specified vCPU to be dropped or
otherwise made consistent with the in-memory LPI configuration
tables.

Here we implement the command and table parsing, leaving the
redistributor part as a stub for the moment, as usual.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-22-peter.maydell@linaro.org

4 files changed, 45 insertions, 0 deletions

diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index c718ef2..0670aca 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -1163,6 +1163,29 @@ static ItsCmdResult process_vmovi(GICv3ITSState *s, const uint64_t *cmdpkt)
     return update_ite(s, eventid, &dte, &ite) ? CMD_CONTINUE_OK : CMD_STALL;
 }
 
+static ItsCmdResult process_vinvall(GICv3ITSState *s, const uint64_t *cmdpkt)
+{
+    VTEntry vte;
+    uint32_t vpeid;
+    ItsCmdResult cmdres;
+
+    if (!its_feature_virtual(s)) {
+        return CMD_CONTINUE;
+    }
+
+    vpeid = FIELD_EX64(cmdpkt[1], VINVALL_1, VPEID);
+
+    trace_gicv3_its_cmd_vinvall(vpeid);
+
+    cmdres = lookup_vte(s, __func__, vpeid, &vte);
+    if (cmdres != CMD_CONTINUE_OK) {
+        return cmdres;
+    }
+
+    gicv3_redist_vinvall(&s->gicv3->cpu[vte.rdbase], vte.vptaddr << 16);
+    return CMD_CONTINUE_OK;
+}
+
 static ItsCmdResult process_inv(GICv3ITSState *s, const uint64_t *cmdpkt)
 {
     uint32_t devid, eventid;
@@ -1364,6 +1387,9 @@ static void process_cmdq(GICv3ITSState *s)
         case GITS_CMD_VMOVI:
             result = process_vmovi(s, cmdpkt);
             break;
+        case GITS_CMD_VINVALL:
+            result = process_vinvall(s, cmdpkt);
+            break;
         default:
             trace_gicv3_its_cmd_unknown(cmd);
             break;
diff --git a/hw/intc/arm_gicv3_redist.c b/hw/intc/arm_gicv3_redist.c
index dc25997..7c75dd6 100644
--- a/hw/intc/arm_gicv3_redist.c
+++ b/hw/intc/arm_gicv3_redist.c
@@ -818,6 +818,11 @@ void gicv3_redist_mov_vlpi(GICv3CPUState *src, uint64_t src_vptaddr,
      */
 }
 
+void gicv3_redist_vinvall(GICv3CPUState *cs, uint64_t vptaddr)
+{
+    /* The redistributor handling will be added in a subsequent commit */
+}
+
 void gicv3_redist_inv_vlpi(GICv3CPUState *cs, int irq, uint64_t vptaddr)
 {
     /*
diff --git a/hw/intc/gicv3_internal.h b/hw/intc/gicv3_internal.h
index e9580f0..a46d137 100644
--- a/hw/intc/gicv3_internal.h
+++ b/hw/intc/gicv3_internal.h
@@ -335,6 +335,7 @@ FIELD(GITS_TYPER, CIL, 36, 1)
 #define GITS_CMD_VMAPP            0x29
 #define GITS_CMD_VMAPTI           0x2A
 #define GITS_CMD_VMAPI            0x2B
+#define GITS_CMD_VINVALL          0x2D
 
 /* MAPC command fields */
 #define ICID_LENGTH                  16
@@ -411,6 +412,9 @@ FIELD(VMOVI_1, VPEID, 32, 16)
 FIELD(VMOVI_2, D, 0, 1)
 FIELD(VMOVI_2, DOORBELL, 32, 32)
 
+/* VINVALL command fields */
+FIELD(VINVALL_1, VPEID, 32, 16)
+
 /*
  * 12 bytes Interrupt translation Table Entry size
  * as per Table 5.3 in GICv3 spec
@@ -637,6 +641,15 @@ void gicv3_redist_movall_lpis(GICv3CPUState *src, GICv3CPUState *dest);
 void gicv3_redist_mov_vlpi(GICv3CPUState *src, uint64_t src_vptaddr,
                            GICv3CPUState *dest, uint64_t dest_vptaddr,
                            int irq, int doorbell);
+/**
+ * gicv3_redist_vinvall:
+ * @cs: GICv3CPUState
+ * @vptaddr: address of VLPI pending table
+ *
+ * On redistributor @cs, invalidate all cached information associated
+ * with the vCPU defined by @vptaddr.
+ */
+void gicv3_redist_vinvall(GICv3CPUState *cs, uint64_t vptaddr);
 
 void gicv3_redist_send_sgi(GICv3CPUState *cs, int grp, int irq, bool ns);
 void gicv3_init_cpuif(GICv3State *s);
diff --git a/hw/intc/trace-events b/hw/intc/trace-events
index 9894756..004a100 100644
--- a/hw/intc/trace-events
+++ b/hw/intc/trace-events
@@ -194,6 +194,7 @@ gicv3_its_cmd_vmapp(uint32_t vpeid, uint64_t rdbase, int valid, uint64_t vptaddr
 gicv3_its_cmd_vmovp(uint32_t vpeid, uint64_t rdbase) "GICv3 ITS: command VMOVP vPEID 0x%x RDbase 0x%" PRIx64
 gicv3_its_cmd_vsync(void) "GICv3 ITS: command VSYNC"
 gicv3_its_cmd_vmovi(uint32_t devid,  uint32_t eventid, uint32_t vpeid, int dbvalid, uint32_t doorbell) "GICv3 ITS: command VMOVI DeviceID 0x%x EventID 0x%x vPEID 0x%x D %d Dbell_pINTID 0x%x"
+gicv3_its_cmd_vinvall(uint32_t vpeid) "GICv3 ITS: command VINVALL vPEID 0x%x"
 gicv3_its_cmd_unknown(unsigned cmd) "GICv3 ITS: unknown command 0x%x"
 gicv3_its_cte_read(uint32_t icid, int valid, uint32_t rdbase) "GICv3 ITS: Collection Table read for ICID 0x%x: valid %d RDBase 0x%x"
 gicv3_its_cte_write(uint32_t icid, int valid, uint32_t rdbase) "GICv3 ITS: Collection Table write for ICID 0x%x: valid %d RDBase 0x%x"