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-rw-r--r--hw/intc/arm_gicv3_its.c102
1 files changed, 55 insertions, 47 deletions
diff --git a/hw/intc/arm_gicv3_its.c b/hw/intc/arm_gicv3_its.c
index 6975a34..bd74108 100644
--- a/hw/intc/arm_gicv3_its.c
+++ b/hw/intc/arm_gicv3_its.c
@@ -57,6 +57,16 @@ typedef struct CTEntry {
uint32_t rdbase;
} CTEntry;
+typedef struct ITEntry {
+ bool valid;
+ int inttype;
+ uint32_t intid;
+ uint32_t doorbell;
+ uint32_t icid;
+ uint32_t vpeid;
+} ITEntry;
+
+
/*
* The ITS spec permits a range of CONSTRAINED UNPREDICTABLE options
* if a command parameter is not correct. These include both "stall
@@ -188,34 +198,38 @@ static bool update_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
}
}
-static bool get_ite(GICv3ITSState *s, uint32_t eventid, const DTEntry *dte,
- uint16_t *icid, uint32_t *pIntid, MemTxResult *res)
+/*
+ * Read the Interrupt Table entry at index @eventid from the table specified
+ * by the DTE @dte. On success, we return MEMTX_OK and populate the ITEntry
+ * struct @ite accordingly. If there is an error reading memory then we return
+ * the error code.
+ */
+static MemTxResult get_ite(GICv3ITSState *s, uint32_t eventid,
+ const DTEntry *dte, ITEntry *ite)
{
AddressSpace *as = &s->gicv3->dma_as;
- bool status = false;
- IteEntry ite = {};
+ MemTxResult res = MEMTX_OK;
+ uint64_t itel;
+ uint32_t iteh;
hwaddr iteaddr = dte->ittaddr + eventid * ITS_ITT_ENTRY_SIZE;
- ite.itel = address_space_ldq_le(as, iteaddr, MEMTXATTRS_UNSPECIFIED, res);
- if (*res != MEMTX_OK) {
- return false;
+ itel = address_space_ldq_le(as, iteaddr, MEMTXATTRS_UNSPECIFIED, &res);
+ if (res != MEMTX_OK) {
+ return res;
}
- ite.iteh = address_space_ldl_le(as, iteaddr + 8,
- MEMTXATTRS_UNSPECIFIED, res);
- if (*res != MEMTX_OK) {
- return false;
+ iteh = address_space_ldl_le(as, iteaddr + 8, MEMTXATTRS_UNSPECIFIED, &res);
+ if (res != MEMTX_OK) {
+ return res;
}
- if (FIELD_EX64(ite.itel, ITE_L, VALID)) {
- int inttype = FIELD_EX64(ite.itel, ITE_L, INTTYPE);
- if (inttype == ITE_INTTYPE_PHYSICAL) {
- *pIntid = FIELD_EX64(ite.itel, ITE_L, INTID);
- *icid = FIELD_EX64(ite.itel, ITE_L, ICID);
- status = true;
- }
- }
- return status;
+ ite->valid = FIELD_EX64(itel, ITE_L, VALID);
+ ite->inttype = FIELD_EX64(itel, ITE_L, INTTYPE);
+ ite->intid = FIELD_EX64(itel, ITE_L, INTID);
+ ite->icid = FIELD_EX64(itel, ITE_L, ICID);
+ ite->vpeid = FIELD_EX64(itel, ITE_L, VPEID);
+ ite->doorbell = FIELD_EX64(iteh, ITE_H, DOORBELL);
+ return MEMTX_OK;
}
/*
@@ -258,13 +272,10 @@ static MemTxResult get_dte(GICv3ITSState *s, uint32_t devid, DTEntry *dte)
static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
uint32_t eventid, ItsCmdType cmd)
{
- MemTxResult res = MEMTX_OK;
uint64_t num_eventids;
- uint16_t icid = 0;
- uint32_t pIntid = 0;
- bool ite_valid = false;
DTEntry dte;
CTEntry cte;
+ ITEntry ite;
if (devid >= s->dt.num_entries) {
qemu_log_mask(LOG_GUEST_ERROR,
@@ -292,26 +303,25 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
return CMD_CONTINUE;
}
- ite_valid = get_ite(s, eventid, &dte, &icid, &pIntid, &res);
- if (res != MEMTX_OK) {
+ if (get_ite(s, eventid, &dte, &ite) != MEMTX_OK) {
return CMD_STALL;
}
- if (!ite_valid) {
+ if (!ite.valid || ite.inttype != ITE_INTTYPE_PHYSICAL) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid command attributes: invalid ITE\n",
__func__);
return CMD_CONTINUE;
}
- if (icid >= s->ct.num_entries) {
+ if (ite.icid >= s->ct.num_entries) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid ICID 0x%x in ITE (table corrupted?)\n",
- __func__, icid);
+ __func__, ite.icid);
return CMD_CONTINUE;
}
- if (get_cte(s, icid, &cte) != MEMTX_OK) {
+ if (get_cte(s, ite.icid, &cte) != MEMTX_OK) {
return CMD_STALL;
}
if (!cte.valid) {
@@ -330,15 +340,15 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
}
if ((cmd == CLEAR) || (cmd == DISCARD)) {
- gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], pIntid, 0);
+ gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], ite.intid, 0);
} else {
- gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], pIntid, 1);
+ gicv3_redist_process_lpi(&s->gicv3->cpu[cte.rdbase], ite.intid, 1);
}
if (cmd == DISCARD) {
- IteEntry ite = {};
+ IteEntry itee = {};
/* remove mapping from interrupt translation table */
- return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
+ return update_ite(s, eventid, &dte, itee) ? CMD_CONTINUE : CMD_STALL;
}
return CMD_CONTINUE;
}
@@ -572,14 +582,13 @@ static ItsCmdResult process_movall(GICv3ITSState *s, const uint64_t *cmdpkt)
static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
{
- MemTxResult res = MEMTX_OK;
- uint32_t devid, eventid, intid;
- uint16_t old_icid, new_icid;
- bool ite_valid;
+ uint32_t devid, eventid;
+ uint16_t new_icid;
uint64_t num_eventids;
IteEntry ite = {};
DTEntry dte;
CTEntry old_cte, new_cte;
+ ITEntry old_ite;
devid = FIELD_EX64(cmdpkt[0], MOVI_0, DEVICEID);
eventid = FIELD_EX64(cmdpkt[1], MOVI_1, EVENTID);
@@ -611,22 +620,21 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
return CMD_CONTINUE;
}
- ite_valid = get_ite(s, eventid, &dte, &old_icid, &intid, &res);
- if (res != MEMTX_OK) {
+ if (get_ite(s, eventid, &dte, &old_ite) != MEMTX_OK) {
return CMD_STALL;
}
- if (!ite_valid) {
+ if (!old_ite.valid || old_ite.inttype != ITE_INTTYPE_PHYSICAL) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid command attributes: invalid ITE\n",
__func__);
return CMD_CONTINUE;
}
- if (old_icid >= s->ct.num_entries) {
+ if (old_ite.icid >= s->ct.num_entries) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid ICID 0x%x in ITE (table corrupted?)\n",
- __func__, old_icid);
+ __func__, old_ite.icid);
return CMD_CONTINUE;
}
@@ -637,14 +645,14 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
return CMD_CONTINUE;
}
- if (get_cte(s, old_icid, &old_cte) != MEMTX_OK) {
+ if (get_cte(s, old_ite.icid, &old_cte) != MEMTX_OK) {
return CMD_STALL;
}
if (!old_cte.valid) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid command attributes: "
"invalid CTE for old ICID 0x%x\n",
- __func__, old_icid);
+ __func__, old_ite.icid);
return CMD_CONTINUE;
}
@@ -677,13 +685,13 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
/* Move the LPI from the old redistributor to the new one */
gicv3_redist_mov_lpi(&s->gicv3->cpu[old_cte.rdbase],
&s->gicv3->cpu[new_cte.rdbase],
- intid);
+ old_ite.intid);
}
/* Update the ICID field in the interrupt translation table entry */
ite.itel = FIELD_DP64(ite.itel, ITE_L, VALID, 1);
ite.itel = FIELD_DP64(ite.itel, ITE_L, INTTYPE, ITE_INTTYPE_PHYSICAL);
- ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, intid);
+ ite.itel = FIELD_DP64(ite.itel, ITE_L, INTID, old_ite.intid);
ite.itel = FIELD_DP64(ite.itel, ITE_L, ICID, new_icid);
ite.iteh = FIELD_DP32(ite.iteh, ITE_H, DOORBELL, INTID_SPURIOUS);
return update_ite(s, eventid, &dte, ite) ? CMD_CONTINUE : CMD_STALL;
generated by cgit v1.1 at 2025-01-01 02:41:36 +0000