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hw/intc/arm_gicv3_its: Factor out CTE lookup sequence 

Factor out the sequence of looking up a CTE from an ICID including
the validity and error checks.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220408141550.1271295-13-peter.maydell@linaro.org
master
Peter Maydell 2022-04-08 15:15:21 +01:00
parent f0175135e7
commit c411db7bf7
1 changed files with 39 additions and 70 deletions
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109
hw/intc/arm_gicv3_its.c
View File

@ -368,6 +368,36 @@ static ItsCmdResult lookup_ite(GICv3ITSState *s, const char *who,
return CMD_CONTINUE_OK;
}
/*
* Given an ICID, look up the corresponding CTE, including checking for various
* invalid-value cases. If we find a valid CTE, fill in @cte and return
* CMD_CONTINUE_OK; otherwise return CMD_STALL or CMD_CONTINUE (and the
* contents of @cte should not be relied on).
*
* The string @who is purely for the LOG_GUEST_ERROR messages,
* and should indicate the name of the calling function or similar.
*/
static ItsCmdResult lookup_cte(GICv3ITSState *s, const char *who,
uint32_t icid, CTEntry *cte)
{
if (icid >= s->ct.num_entries) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid ICID 0x%x\n", who, icid);
return CMD_CONTINUE;
}
if (get_cte(s, icid, cte) != MEMTX_OK) {
return CMD_STALL;
}
if (!cte->valid) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid CTE\n", who);
return CMD_CONTINUE;
}
if (cte->rdbase >= s->gicv3->num_cpu) {
return CMD_CONTINUE;
}
return CMD_CONTINUE_OK;
}
/*
* This function handles the processing of following commands based on
* the ItsCmdType parameter passed:-
@ -396,29 +426,9 @@ static ItsCmdResult do_process_its_cmd(GICv3ITSState *s, uint32_t devid,
return CMD_CONTINUE;
}
if (ite.icid >= s->ct.num_entries) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid ICID 0x%x in ITE (table corrupted?)\n",
__func__, ite.icid);
return CMD_CONTINUE;
}
if (get_cte(s, ite.icid, &cte) != MEMTX_OK) {
return CMD_STALL;
}
if (!cte.valid) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid command attributes: invalid CTE\n",
__func__);
return CMD_CONTINUE;
}
/*
* Current implementation only supports rdbase == procnum
* Hence rdbase physical address is ignored
*/
if (cte.rdbase >= s->gicv3->num_cpu) {
return CMD_CONTINUE;
cmdres = lookup_cte(s, __func__, ite.icid, &cte);
if (cmdres != CMD_CONTINUE_OK) {
return cmdres;
}
if ((cmd == CLEAR) || (cmd == DISCARD)) {
@ -792,54 +802,13 @@ static ItsCmdResult process_movi(GICv3ITSState *s, const uint64_t *cmdpkt)
return CMD_CONTINUE;
}
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_ite.icid);
return CMD_CONTINUE;
cmdres = lookup_cte(s, __func__, old_ite.icid, &old_cte);
if (cmdres != CMD_CONTINUE_OK) {
return cmdres;
}
if (new_icid >= s->ct.num_entries) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid command attributes: ICID 0x%x\n",
__func__, new_icid);
return CMD_CONTINUE;
}
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_ite.icid);
return CMD_CONTINUE;
}
if (get_cte(s, new_icid, &new_cte) != MEMTX_OK) {
return CMD_STALL;
}
if (!new_cte.valid) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: invalid command attributes: "
"invalid CTE for new ICID 0x%x\n",
__func__, new_icid);
return CMD_CONTINUE;
}
if (old_cte.rdbase >= s->gicv3->num_cpu) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: CTE has invalid rdbase 0x%x\n",
__func__, old_cte.rdbase);
return CMD_CONTINUE;
}
if (new_cte.rdbase >= s->gicv3->num_cpu) {
qemu_log_mask(LOG_GUEST_ERROR,
"%s: CTE has invalid rdbase 0x%x\n",
__func__, new_cte.rdbase);
return CMD_CONTINUE;
cmdres = lookup_cte(s, __func__, new_icid, &new_cte);
if (cmdres != CMD_CONTINUE_OK) {
return cmdres;
}
if (old_cte.rdbase != new_cte.rdbase) {