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irqchip/gic-v3-its: Allow use of indirect VCPU tables
The VCPU tables can be quite sparse as well, and it makes sense to use indirect tables as well if possible. Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Eric Auger <eric.auger@redhat.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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@ -1077,10 +1077,13 @@ retry_baser:
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return 0;
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}
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static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser,
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u32 psz, u32 *order)
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static bool its_parse_indirect_baser(struct its_node *its,
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struct its_baser *baser,
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u32 psz, u32 *order)
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{
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u64 esz = GITS_BASER_ENTRY_SIZE(its_read_baser(its, baser));
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u64 tmp = its_read_baser(its, baser);
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u64 type = GITS_BASER_TYPE(tmp);
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u64 esz = GITS_BASER_ENTRY_SIZE(tmp);
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u64 val = GITS_BASER_InnerShareable | GITS_BASER_RaWaWb;
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u32 ids = its->device_ids;
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u32 new_order = *order;
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@ -1119,8 +1122,9 @@ static bool its_parse_baser_device(struct its_node *its, struct its_baser *baser
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if (new_order >= MAX_ORDER) {
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new_order = MAX_ORDER - 1;
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ids = ilog2(PAGE_ORDER_TO_SIZE(new_order) / (int)esz);
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pr_warn("ITS@%pa: Device Table too large, reduce ids %u->%u\n",
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&its->phys_base, its->device_ids, ids);
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pr_warn("ITS@%pa: %s Table too large, reduce ids %u->%u\n",
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&its->phys_base, its_base_type_string[type],
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its->device_ids, ids);
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}
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*order = new_order;
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@ -1168,11 +1172,16 @@ static int its_alloc_tables(struct its_node *its)
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u32 order = get_order(psz);
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bool indirect = false;
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if (type == GITS_BASER_TYPE_NONE)
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switch (type) {
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case GITS_BASER_TYPE_NONE:
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continue;
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if (type == GITS_BASER_TYPE_DEVICE)
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indirect = its_parse_baser_device(its, baser, psz, &order);
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case GITS_BASER_TYPE_DEVICE:
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case GITS_BASER_TYPE_VCPU:
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indirect = its_parse_indirect_baser(its, baser,
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psz, &order);
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break;
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}
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err = its_setup_baser(its, baser, cache, shr, psz, order, indirect);
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if (err < 0) {
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