1323 lines
39 KiB
C
1323 lines
39 KiB
C
/*
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* ITS emulation for a GICv3-based system
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*
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* Copyright Linaro.org 2021
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*
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* Authors:
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* Shashi Mallela <shashi.mallela@linaro.org>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at your
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* option) any later version. See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qemu/log.h"
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#include "hw/qdev-properties.h"
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#include "hw/intc/arm_gicv3_its_common.h"
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#include "gicv3_internal.h"
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#include "qom/object.h"
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#include "qapi/error.h"
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typedef struct GICv3ITSClass GICv3ITSClass;
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/* This is reusing the GICv3ITSState typedef from ARM_GICV3_ITS_COMMON */
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DECLARE_OBJ_CHECKERS(GICv3ITSState, GICv3ITSClass,
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ARM_GICV3_ITS, TYPE_ARM_GICV3_ITS)
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struct GICv3ITSClass {
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GICv3ITSCommonClass parent_class;
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void (*parent_reset)(DeviceState *dev);
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};
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/*
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* This is an internal enum used to distinguish between LPI triggered
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* via command queue and LPI triggered via gits_translater write.
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*/
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typedef enum ItsCmdType {
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NONE = 0, /* internal indication for GITS_TRANSLATER write */
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CLEAR = 1,
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DISCARD = 2,
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INTERRUPT = 3,
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} ItsCmdType;
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typedef struct {
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uint32_t iteh;
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uint64_t itel;
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} IteEntry;
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static uint64_t baser_base_addr(uint64_t value, uint32_t page_sz)
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{
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uint64_t result = 0;
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switch (page_sz) {
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case GITS_PAGE_SIZE_4K:
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case GITS_PAGE_SIZE_16K:
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result = FIELD_EX64(value, GITS_BASER, PHYADDR) << 12;
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break;
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case GITS_PAGE_SIZE_64K:
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result = FIELD_EX64(value, GITS_BASER, PHYADDRL_64K) << 16;
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result |= FIELD_EX64(value, GITS_BASER, PHYADDRH_64K) << 48;
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break;
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default:
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break;
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}
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return result;
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}
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static bool get_cte(GICv3ITSState *s, uint16_t icid, uint64_t *cte,
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MemTxResult *res)
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{
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AddressSpace *as = &s->gicv3->dma_as;
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uint64_t l2t_addr;
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uint64_t value;
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bool valid_l2t;
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uint32_t l2t_id;
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uint32_t max_l2_entries;
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if (s->ct.indirect) {
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l2t_id = icid / (s->ct.page_sz / L1TABLE_ENTRY_SIZE);
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value = address_space_ldq_le(as,
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s->ct.base_addr +
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(l2t_id * L1TABLE_ENTRY_SIZE),
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MEMTXATTRS_UNSPECIFIED, res);
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if (*res == MEMTX_OK) {
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valid_l2t = (value & L2_TABLE_VALID_MASK) != 0;
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if (valid_l2t) {
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max_l2_entries = s->ct.page_sz / s->ct.entry_sz;
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l2t_addr = value & ((1ULL << 51) - 1);
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*cte = address_space_ldq_le(as, l2t_addr +
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((icid % max_l2_entries) * GITS_CTE_SIZE),
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MEMTXATTRS_UNSPECIFIED, res);
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}
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}
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} else {
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/* Flat level table */
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*cte = address_space_ldq_le(as, s->ct.base_addr +
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(icid * GITS_CTE_SIZE),
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MEMTXATTRS_UNSPECIFIED, res);
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}
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return (*cte & TABLE_ENTRY_VALID_MASK) != 0;
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}
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static bool update_ite(GICv3ITSState *s, uint32_t eventid, uint64_t dte,
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IteEntry ite)
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{
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AddressSpace *as = &s->gicv3->dma_as;
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uint64_t itt_addr;
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MemTxResult res = MEMTX_OK;
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itt_addr = (dte & GITS_DTE_ITTADDR_MASK) >> GITS_DTE_ITTADDR_SHIFT;
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itt_addr <<= ITTADDR_SHIFT; /* 256 byte aligned */
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address_space_stq_le(as, itt_addr + (eventid * (sizeof(uint64_t) +
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sizeof(uint32_t))), ite.itel, MEMTXATTRS_UNSPECIFIED,
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&res);
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if (res == MEMTX_OK) {
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address_space_stl_le(as, itt_addr + (eventid * (sizeof(uint64_t) +
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sizeof(uint32_t))) + sizeof(uint32_t), ite.iteh,
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MEMTXATTRS_UNSPECIFIED, &res);
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}
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if (res != MEMTX_OK) {
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return false;
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} else {
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return true;
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}
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}
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static bool get_ite(GICv3ITSState *s, uint32_t eventid, uint64_t dte,
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uint16_t *icid, uint32_t *pIntid, MemTxResult *res)
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{
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AddressSpace *as = &s->gicv3->dma_as;
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uint64_t itt_addr;
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bool status = false;
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IteEntry ite = {};
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itt_addr = (dte & GITS_DTE_ITTADDR_MASK) >> GITS_DTE_ITTADDR_SHIFT;
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itt_addr <<= ITTADDR_SHIFT; /* 256 byte aligned */
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ite.itel = address_space_ldq_le(as, itt_addr +
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(eventid * (sizeof(uint64_t) +
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sizeof(uint32_t))), MEMTXATTRS_UNSPECIFIED,
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res);
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if (*res == MEMTX_OK) {
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ite.iteh = address_space_ldl_le(as, itt_addr +
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(eventid * (sizeof(uint64_t) +
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sizeof(uint32_t))) + sizeof(uint32_t),
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MEMTXATTRS_UNSPECIFIED, res);
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if (*res == MEMTX_OK) {
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if (ite.itel & TABLE_ENTRY_VALID_MASK) {
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if ((ite.itel >> ITE_ENTRY_INTTYPE_SHIFT) &
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GITS_TYPE_PHYSICAL) {
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*pIntid = (ite.itel & ITE_ENTRY_INTID_MASK) >>
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ITE_ENTRY_INTID_SHIFT;
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*icid = ite.iteh & ITE_ENTRY_ICID_MASK;
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status = true;
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}
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}
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}
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}
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return status;
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}
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static uint64_t get_dte(GICv3ITSState *s, uint32_t devid, MemTxResult *res)
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{
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AddressSpace *as = &s->gicv3->dma_as;
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uint64_t l2t_addr;
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uint64_t value;
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bool valid_l2t;
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uint32_t l2t_id;
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uint32_t max_l2_entries;
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if (s->dt.indirect) {
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l2t_id = devid / (s->dt.page_sz / L1TABLE_ENTRY_SIZE);
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value = address_space_ldq_le(as,
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s->dt.base_addr +
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(l2t_id * L1TABLE_ENTRY_SIZE),
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MEMTXATTRS_UNSPECIFIED, res);
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if (*res == MEMTX_OK) {
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valid_l2t = (value & L2_TABLE_VALID_MASK) != 0;
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if (valid_l2t) {
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max_l2_entries = s->dt.page_sz / s->dt.entry_sz;
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l2t_addr = value & ((1ULL << 51) - 1);
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value = address_space_ldq_le(as, l2t_addr +
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((devid % max_l2_entries) * GITS_DTE_SIZE),
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MEMTXATTRS_UNSPECIFIED, res);
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}
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}
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} else {
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/* Flat level table */
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value = address_space_ldq_le(as, s->dt.base_addr +
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(devid * GITS_DTE_SIZE),
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MEMTXATTRS_UNSPECIFIED, res);
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}
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return value;
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}
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/*
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* This function handles the processing of following commands based on
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* the ItsCmdType parameter passed:-
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* 1. triggering of lpi interrupt translation via ITS INT command
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* 2. triggering of lpi interrupt translation via gits_translater register
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* 3. handling of ITS CLEAR command
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* 4. handling of ITS DISCARD command
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*/
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static bool process_its_cmd(GICv3ITSState *s, uint64_t value, uint32_t offset,
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ItsCmdType cmd)
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{
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AddressSpace *as = &s->gicv3->dma_as;
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uint32_t devid, eventid;
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MemTxResult res = MEMTX_OK;
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bool dte_valid;
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uint64_t dte = 0;
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uint32_t max_eventid;
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uint16_t icid = 0;
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uint32_t pIntid = 0;
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bool ite_valid = false;
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uint64_t cte = 0;
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bool cte_valid = false;
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bool result = false;
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uint64_t rdbase;
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if (cmd == NONE) {
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devid = offset;
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} else {
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devid = ((value & DEVID_MASK) >> DEVID_SHIFT);
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offset += NUM_BYTES_IN_DW;
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value = address_space_ldq_le(as, s->cq.base_addr + offset,
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MEMTXATTRS_UNSPECIFIED, &res);
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}
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if (res != MEMTX_OK) {
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return result;
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}
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eventid = (value & EVENTID_MASK);
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dte = get_dte(s, devid, &res);
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if (res != MEMTX_OK) {
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return result;
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}
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dte_valid = dte & TABLE_ENTRY_VALID_MASK;
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if (dte_valid) {
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max_eventid = (1UL << (((dte >> 1U) & SIZE_MASK) + 1));
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ite_valid = get_ite(s, eventid, dte, &icid, &pIntid, &res);
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if (res != MEMTX_OK) {
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return result;
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}
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if (ite_valid) {
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cte_valid = get_cte(s, icid, &cte, &res);
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}
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if (res != MEMTX_OK) {
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return result;
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}
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}
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if ((devid > s->dt.maxids.max_devids) || !dte_valid || !ite_valid ||
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!cte_valid || (eventid > max_eventid)) {
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qemu_log_mask(LOG_GUEST_ERROR,
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"%s: invalid command attributes "
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"devid %d or eventid %d or invalid dte %d or"
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"invalid cte %d or invalid ite %d\n",
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__func__, devid, eventid, dte_valid, cte_valid,
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ite_valid);
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/*
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* in this implementation, in case of error
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* we ignore this command and move onto the next
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* command in the queue
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*/
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} else {
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/*
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* Current implementation only supports rdbase == procnum
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* Hence rdbase physical address is ignored
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*/
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rdbase = (cte & GITS_CTE_RDBASE_PROCNUM_MASK) >> 1U;
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if (rdbase > s->gicv3->num_cpu) {
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return result;
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}
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if ((cmd == CLEAR) || (cmd == DISCARD)) {
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gicv3_redist_process_lpi(&s->gicv3->cpu[rdbase], pIntid, 0);
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} else {
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gicv3_redist_process_lpi(&s->gicv3->cpu[rdbase], pIntid, 1);
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}
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if (cmd == DISCARD) {
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IteEntry ite = {};
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/* remove mapping from interrupt translation table */
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result = update_ite(s, eventid, dte, ite);
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}
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}
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return result;
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}
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static bool process_mapti(GICv3ITSState *s, uint64_t value, uint32_t offset,
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bool ignore_pInt)
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{
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AddressSpace *as = &s->gicv3->dma_as;
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uint32_t devid, eventid;
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uint32_t pIntid = 0;
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uint32_t max_eventid, max_Intid;
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bool dte_valid;
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MemTxResult res = MEMTX_OK;
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uint16_t icid = 0;
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uint64_t dte = 0;
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IteEntry ite;
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uint32_t int_spurious = INTID_SPURIOUS;
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bool result = false;
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devid = ((value & DEVID_MASK) >> DEVID_SHIFT);
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offset += NUM_BYTES_IN_DW;
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value = address_space_ldq_le(as, s->cq.base_addr + offset,
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MEMTXATTRS_UNSPECIFIED, &res);
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if (res != MEMTX_OK) {
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return result;
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}
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eventid = (value & EVENTID_MASK);
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if (!ignore_pInt) {
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pIntid = ((value & pINTID_MASK) >> pINTID_SHIFT);
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}
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offset += NUM_BYTES_IN_DW;
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value = address_space_ldq_le(as, s->cq.base_addr + offset,
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MEMTXATTRS_UNSPECIFIED, &res);
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if (res != MEMTX_OK) {
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return result;
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}
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icid = value & ICID_MASK;
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dte = get_dte(s, devid, &res);
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if (res != MEMTX_OK) {
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return result;
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}
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dte_valid = dte & TABLE_ENTRY_VALID_MASK;
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max_eventid = (1UL << (((dte >> 1U) & SIZE_MASK) + 1));
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if (!ignore_pInt) {
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max_Intid = (1ULL << (GICD_TYPER_IDBITS + 1)) - 1;
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}
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if ((devid > s->dt.maxids.max_devids) || (icid > s->ct.maxids.max_collids)
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|| !dte_valid || (eventid > max_eventid) ||
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(!ignore_pInt && (((pIntid < GICV3_LPI_INTID_START) ||
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(pIntid > max_Intid)) && (pIntid != INTID_SPURIOUS)))) {
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qemu_log_mask(LOG_GUEST_ERROR,
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"%s: invalid command attributes "
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"devid %d or icid %d or eventid %d or pIntid %d or"
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"unmapped dte %d\n", __func__, devid, icid, eventid,
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pIntid, dte_valid);
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/*
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* in this implementation, in case of error
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* we ignore this command and move onto the next
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* command in the queue
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*/
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} else {
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/* add ite entry to interrupt translation table */
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ite.itel = (dte_valid & TABLE_ENTRY_VALID_MASK) |
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(GITS_TYPE_PHYSICAL << ITE_ENTRY_INTTYPE_SHIFT);
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if (ignore_pInt) {
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ite.itel |= (eventid << ITE_ENTRY_INTID_SHIFT);
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} else {
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ite.itel |= (pIntid << ITE_ENTRY_INTID_SHIFT);
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}
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ite.itel |= (int_spurious << ITE_ENTRY_INTSP_SHIFT);
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ite.iteh = icid;
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result = update_ite(s, eventid, dte, ite);
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}
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return result;
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}
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static bool update_cte(GICv3ITSState *s, uint16_t icid, bool valid,
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uint64_t rdbase)
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{
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AddressSpace *as = &s->gicv3->dma_as;
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uint64_t value;
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uint64_t l2t_addr;
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bool valid_l2t;
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uint32_t l2t_id;
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uint32_t max_l2_entries;
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uint64_t cte = 0;
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MemTxResult res = MEMTX_OK;
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if (!s->ct.valid) {
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return true;
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}
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if (valid) {
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/* add mapping entry to collection table */
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cte = (valid & TABLE_ENTRY_VALID_MASK) | (rdbase << 1ULL);
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}
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/*
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* The specification defines the format of level 1 entries of a
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* 2-level table, but the format of level 2 entries and the format
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* of flat-mapped tables is IMPDEF.
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*/
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if (s->ct.indirect) {
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l2t_id = icid / (s->ct.page_sz / L1TABLE_ENTRY_SIZE);
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value = address_space_ldq_le(as,
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s->ct.base_addr +
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(l2t_id * L1TABLE_ENTRY_SIZE),
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MEMTXATTRS_UNSPECIFIED, &res);
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|
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if (res != MEMTX_OK) {
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return false;
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}
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|
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valid_l2t = (value & L2_TABLE_VALID_MASK) != 0;
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|
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if (valid_l2t) {
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max_l2_entries = s->ct.page_sz / s->ct.entry_sz;
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l2t_addr = value & ((1ULL << 51) - 1);
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address_space_stq_le(as, l2t_addr +
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((icid % max_l2_entries) * GITS_CTE_SIZE),
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cte, MEMTXATTRS_UNSPECIFIED, &res);
|
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}
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} else {
|
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/* Flat level table */
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address_space_stq_le(as, s->ct.base_addr + (icid * GITS_CTE_SIZE),
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cte, MEMTXATTRS_UNSPECIFIED, &res);
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}
|
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if (res != MEMTX_OK) {
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return false;
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} else {
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return true;
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}
|
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}
|
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|
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static bool process_mapc(GICv3ITSState *s, uint32_t offset)
|
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{
|
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AddressSpace *as = &s->gicv3->dma_as;
|
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uint16_t icid;
|
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uint64_t rdbase;
|
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bool valid;
|
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MemTxResult res = MEMTX_OK;
|
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bool result = false;
|
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uint64_t value;
|
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|
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offset += NUM_BYTES_IN_DW;
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offset += NUM_BYTES_IN_DW;
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|
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value = address_space_ldq_le(as, s->cq.base_addr + offset,
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MEMTXATTRS_UNSPECIFIED, &res);
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|
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if (res != MEMTX_OK) {
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return result;
|
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}
|
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|
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icid = value & ICID_MASK;
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|
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rdbase = (value & R_MAPC_RDBASE_MASK) >> R_MAPC_RDBASE_SHIFT;
|
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rdbase &= RDBASE_PROCNUM_MASK;
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|
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valid = (value & CMD_FIELD_VALID_MASK);
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|
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if ((icid > s->ct.maxids.max_collids) || (rdbase > s->gicv3->num_cpu)) {
|
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qemu_log_mask(LOG_GUEST_ERROR,
|
|
"ITS MAPC: invalid collection table attributes "
|
|
"icid %d rdbase %" PRIu64 "\n", icid, rdbase);
|
|
/*
|
|
* in this implementation, in case of error
|
|
* we ignore this command and move onto the next
|
|
* command in the queue
|
|
*/
|
|
} else {
|
|
result = update_cte(s, icid, valid, rdbase);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static bool update_dte(GICv3ITSState *s, uint32_t devid, bool valid,
|
|
uint8_t size, uint64_t itt_addr)
|
|
{
|
|
AddressSpace *as = &s->gicv3->dma_as;
|
|
uint64_t value;
|
|
uint64_t l2t_addr;
|
|
bool valid_l2t;
|
|
uint32_t l2t_id;
|
|
uint32_t max_l2_entries;
|
|
uint64_t dte = 0;
|
|
MemTxResult res = MEMTX_OK;
|
|
|
|
if (s->dt.valid) {
|
|
if (valid) {
|
|
/* add mapping entry to device table */
|
|
dte = (valid & TABLE_ENTRY_VALID_MASK) |
|
|
((size & SIZE_MASK) << 1U) |
|
|
(itt_addr << GITS_DTE_ITTADDR_SHIFT);
|
|
}
|
|
} else {
|
|
return true;
|
|
}
|
|
|
|
/*
|
|
* The specification defines the format of level 1 entries of a
|
|
* 2-level table, but the format of level 2 entries and the format
|
|
* of flat-mapped tables is IMPDEF.
|
|
*/
|
|
if (s->dt.indirect) {
|
|
l2t_id = devid / (s->dt.page_sz / L1TABLE_ENTRY_SIZE);
|
|
|
|
value = address_space_ldq_le(as,
|
|
s->dt.base_addr +
|
|
(l2t_id * L1TABLE_ENTRY_SIZE),
|
|
MEMTXATTRS_UNSPECIFIED, &res);
|
|
|
|
if (res != MEMTX_OK) {
|
|
return false;
|
|
}
|
|
|
|
valid_l2t = (value & L2_TABLE_VALID_MASK) != 0;
|
|
|
|
if (valid_l2t) {
|
|
max_l2_entries = s->dt.page_sz / s->dt.entry_sz;
|
|
|
|
l2t_addr = value & ((1ULL << 51) - 1);
|
|
|
|
address_space_stq_le(as, l2t_addr +
|
|
((devid % max_l2_entries) * GITS_DTE_SIZE),
|
|
dte, MEMTXATTRS_UNSPECIFIED, &res);
|
|
}
|
|
} else {
|
|
/* Flat level table */
|
|
address_space_stq_le(as, s->dt.base_addr + (devid * GITS_DTE_SIZE),
|
|
dte, MEMTXATTRS_UNSPECIFIED, &res);
|
|
}
|
|
if (res != MEMTX_OK) {
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
static bool process_mapd(GICv3ITSState *s, uint64_t value, uint32_t offset)
|
|
{
|
|
AddressSpace *as = &s->gicv3->dma_as;
|
|
uint32_t devid;
|
|
uint8_t size;
|
|
uint64_t itt_addr;
|
|
bool valid;
|
|
MemTxResult res = MEMTX_OK;
|
|
bool result = false;
|
|
|
|
devid = ((value & DEVID_MASK) >> DEVID_SHIFT);
|
|
|
|
offset += NUM_BYTES_IN_DW;
|
|
value = address_space_ldq_le(as, s->cq.base_addr + offset,
|
|
MEMTXATTRS_UNSPECIFIED, &res);
|
|
|
|
if (res != MEMTX_OK) {
|
|
return result;
|
|
}
|
|
|
|
size = (value & SIZE_MASK);
|
|
|
|
offset += NUM_BYTES_IN_DW;
|
|
value = address_space_ldq_le(as, s->cq.base_addr + offset,
|
|
MEMTXATTRS_UNSPECIFIED, &res);
|
|
|
|
if (res != MEMTX_OK) {
|
|
return result;
|
|
}
|
|
|
|
itt_addr = (value & ITTADDR_MASK) >> ITTADDR_SHIFT;
|
|
|
|
valid = (value & CMD_FIELD_VALID_MASK);
|
|
|
|
if ((devid > s->dt.maxids.max_devids) ||
|
|
(size > FIELD_EX64(s->typer, GITS_TYPER, IDBITS))) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"ITS MAPD: invalid device table attributes "
|
|
"devid %d or size %d\n", devid, size);
|
|
/*
|
|
* in this implementation, in case of error
|
|
* we ignore this command and move onto the next
|
|
* command in the queue
|
|
*/
|
|
} else {
|
|
result = update_dte(s, devid, valid, size, itt_addr);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Current implementation blocks until all
|
|
* commands are processed
|
|
*/
|
|
static void process_cmdq(GICv3ITSState *s)
|
|
{
|
|
uint32_t wr_offset = 0;
|
|
uint32_t rd_offset = 0;
|
|
uint32_t cq_offset = 0;
|
|
uint64_t data;
|
|
AddressSpace *as = &s->gicv3->dma_as;
|
|
MemTxResult res = MEMTX_OK;
|
|
bool result = true;
|
|
uint8_t cmd;
|
|
int i;
|
|
|
|
if (!(s->ctlr & ITS_CTLR_ENABLED)) {
|
|
return;
|
|
}
|
|
|
|
wr_offset = FIELD_EX64(s->cwriter, GITS_CWRITER, OFFSET);
|
|
|
|
if (wr_offset > s->cq.max_entries) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid write offset "
|
|
"%d\n", __func__, wr_offset);
|
|
return;
|
|
}
|
|
|
|
rd_offset = FIELD_EX64(s->creadr, GITS_CREADR, OFFSET);
|
|
|
|
if (rd_offset > s->cq.max_entries) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid read offset "
|
|
"%d\n", __func__, rd_offset);
|
|
return;
|
|
}
|
|
|
|
while (wr_offset != rd_offset) {
|
|
cq_offset = (rd_offset * GITS_CMDQ_ENTRY_SIZE);
|
|
data = address_space_ldq_le(as, s->cq.base_addr + cq_offset,
|
|
MEMTXATTRS_UNSPECIFIED, &res);
|
|
if (res != MEMTX_OK) {
|
|
result = false;
|
|
}
|
|
cmd = (data & CMD_MASK);
|
|
|
|
switch (cmd) {
|
|
case GITS_CMD_INT:
|
|
res = process_its_cmd(s, data, cq_offset, INTERRUPT);
|
|
break;
|
|
case GITS_CMD_CLEAR:
|
|
res = process_its_cmd(s, data, cq_offset, CLEAR);
|
|
break;
|
|
case GITS_CMD_SYNC:
|
|
/*
|
|
* Current implementation makes a blocking synchronous call
|
|
* for every command issued earlier, hence the internal state
|
|
* is already consistent by the time SYNC command is executed.
|
|
* Hence no further processing is required for SYNC command.
|
|
*/
|
|
break;
|
|
case GITS_CMD_MAPD:
|
|
result = process_mapd(s, data, cq_offset);
|
|
break;
|
|
case GITS_CMD_MAPC:
|
|
result = process_mapc(s, cq_offset);
|
|
break;
|
|
case GITS_CMD_MAPTI:
|
|
result = process_mapti(s, data, cq_offset, false);
|
|
break;
|
|
case GITS_CMD_MAPI:
|
|
result = process_mapti(s, data, cq_offset, true);
|
|
break;
|
|
case GITS_CMD_DISCARD:
|
|
result = process_its_cmd(s, data, cq_offset, DISCARD);
|
|
break;
|
|
case GITS_CMD_INV:
|
|
case GITS_CMD_INVALL:
|
|
/*
|
|
* Current implementation doesn't cache any ITS tables,
|
|
* but the calculated lpi priority information. We only
|
|
* need to trigger lpi priority re-calculation to be in
|
|
* sync with LPI config table or pending table changes.
|
|
*/
|
|
for (i = 0; i < s->gicv3->num_cpu; i++) {
|
|
gicv3_redist_update_lpi(&s->gicv3->cpu[i]);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (result) {
|
|
rd_offset++;
|
|
rd_offset %= s->cq.max_entries;
|
|
s->creadr = FIELD_DP64(s->creadr, GITS_CREADR, OFFSET, rd_offset);
|
|
} else {
|
|
/*
|
|
* in this implementation, in case of dma read/write error
|
|
* we stall the command processing
|
|
*/
|
|
s->creadr = FIELD_DP64(s->creadr, GITS_CREADR, STALLED, 1);
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: %x cmd processing failed\n", __func__, cmd);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function extracts the ITS Device and Collection table specific
|
|
* parameters (like base_addr, size etc) from GITS_BASER register.
|
|
* It is called during ITS enable and also during post_load migration
|
|
*/
|
|
static void extract_table_params(GICv3ITSState *s)
|
|
{
|
|
uint16_t num_pages = 0;
|
|
uint8_t page_sz_type;
|
|
uint8_t type;
|
|
uint32_t page_sz = 0;
|
|
uint64_t value;
|
|
|
|
for (int i = 0; i < 8; i++) {
|
|
value = s->baser[i];
|
|
|
|
if (!value) {
|
|
continue;
|
|
}
|
|
|
|
page_sz_type = FIELD_EX64(value, GITS_BASER, PAGESIZE);
|
|
|
|
switch (page_sz_type) {
|
|
case 0:
|
|
page_sz = GITS_PAGE_SIZE_4K;
|
|
break;
|
|
|
|
case 1:
|
|
page_sz = GITS_PAGE_SIZE_16K;
|
|
break;
|
|
|
|
case 2:
|
|
case 3:
|
|
page_sz = GITS_PAGE_SIZE_64K;
|
|
break;
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
num_pages = FIELD_EX64(value, GITS_BASER, SIZE) + 1;
|
|
|
|
type = FIELD_EX64(value, GITS_BASER, TYPE);
|
|
|
|
switch (type) {
|
|
|
|
case GITS_BASER_TYPE_DEVICE:
|
|
memset(&s->dt, 0 , sizeof(s->dt));
|
|
s->dt.valid = FIELD_EX64(value, GITS_BASER, VALID);
|
|
|
|
if (!s->dt.valid) {
|
|
return;
|
|
}
|
|
|
|
s->dt.page_sz = page_sz;
|
|
s->dt.indirect = FIELD_EX64(value, GITS_BASER, INDIRECT);
|
|
s->dt.entry_sz = FIELD_EX64(value, GITS_BASER, ENTRYSIZE);
|
|
|
|
if (!s->dt.indirect) {
|
|
s->dt.max_entries = (num_pages * page_sz) / s->dt.entry_sz;
|
|
} else {
|
|
s->dt.max_entries = (((num_pages * page_sz) /
|
|
L1TABLE_ENTRY_SIZE) *
|
|
(page_sz / s->dt.entry_sz));
|
|
}
|
|
|
|
s->dt.maxids.max_devids = (1UL << (FIELD_EX64(s->typer, GITS_TYPER,
|
|
DEVBITS) + 1));
|
|
|
|
s->dt.base_addr = baser_base_addr(value, page_sz);
|
|
|
|
break;
|
|
|
|
case GITS_BASER_TYPE_COLLECTION:
|
|
memset(&s->ct, 0 , sizeof(s->ct));
|
|
s->ct.valid = FIELD_EX64(value, GITS_BASER, VALID);
|
|
|
|
/*
|
|
* GITS_TYPER.HCC is 0 for this implementation
|
|
* hence writes are discarded if ct.valid is 0
|
|
*/
|
|
if (!s->ct.valid) {
|
|
return;
|
|
}
|
|
|
|
s->ct.page_sz = page_sz;
|
|
s->ct.indirect = FIELD_EX64(value, GITS_BASER, INDIRECT);
|
|
s->ct.entry_sz = FIELD_EX64(value, GITS_BASER, ENTRYSIZE);
|
|
|
|
if (!s->ct.indirect) {
|
|
s->ct.max_entries = (num_pages * page_sz) / s->ct.entry_sz;
|
|
} else {
|
|
s->ct.max_entries = (((num_pages * page_sz) /
|
|
L1TABLE_ENTRY_SIZE) *
|
|
(page_sz / s->ct.entry_sz));
|
|
}
|
|
|
|
if (FIELD_EX64(s->typer, GITS_TYPER, CIL)) {
|
|
s->ct.maxids.max_collids = (1UL << (FIELD_EX64(s->typer,
|
|
GITS_TYPER, CIDBITS) + 1));
|
|
} else {
|
|
/* 16-bit CollectionId supported when CIL == 0 */
|
|
s->ct.maxids.max_collids = (1UL << 16);
|
|
}
|
|
|
|
s->ct.base_addr = baser_base_addr(value, page_sz);
|
|
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void extract_cmdq_params(GICv3ITSState *s)
|
|
{
|
|
uint16_t num_pages = 0;
|
|
uint64_t value = s->cbaser;
|
|
|
|
num_pages = FIELD_EX64(value, GITS_CBASER, SIZE) + 1;
|
|
|
|
memset(&s->cq, 0 , sizeof(s->cq));
|
|
s->cq.valid = FIELD_EX64(value, GITS_CBASER, VALID);
|
|
|
|
if (s->cq.valid) {
|
|
s->cq.max_entries = (num_pages * GITS_PAGE_SIZE_4K) /
|
|
GITS_CMDQ_ENTRY_SIZE;
|
|
s->cq.base_addr = FIELD_EX64(value, GITS_CBASER, PHYADDR);
|
|
s->cq.base_addr <<= R_GITS_CBASER_PHYADDR_SHIFT;
|
|
}
|
|
}
|
|
|
|
static MemTxResult gicv3_its_translation_write(void *opaque, hwaddr offset,
|
|
uint64_t data, unsigned size,
|
|
MemTxAttrs attrs)
|
|
{
|
|
GICv3ITSState *s = (GICv3ITSState *)opaque;
|
|
bool result = true;
|
|
uint32_t devid = 0;
|
|
|
|
switch (offset) {
|
|
case GITS_TRANSLATER:
|
|
if (s->ctlr & ITS_CTLR_ENABLED) {
|
|
devid = attrs.requester_id;
|
|
result = process_its_cmd(s, data, devid, NONE);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (result) {
|
|
return MEMTX_OK;
|
|
} else {
|
|
return MEMTX_ERROR;
|
|
}
|
|
}
|
|
|
|
static bool its_writel(GICv3ITSState *s, hwaddr offset,
|
|
uint64_t value, MemTxAttrs attrs)
|
|
{
|
|
bool result = true;
|
|
int index;
|
|
|
|
switch (offset) {
|
|
case GITS_CTLR:
|
|
s->ctlr |= (value & ~(s->ctlr));
|
|
|
|
if (s->ctlr & ITS_CTLR_ENABLED) {
|
|
extract_table_params(s);
|
|
extract_cmdq_params(s);
|
|
s->creadr = 0;
|
|
process_cmdq(s);
|
|
}
|
|
break;
|
|
case GITS_CBASER:
|
|
/*
|
|
* IMPDEF choice:- GITS_CBASER register becomes RO if ITS is
|
|
* already enabled
|
|
*/
|
|
if (!(s->ctlr & ITS_CTLR_ENABLED)) {
|
|
s->cbaser = deposit64(s->cbaser, 0, 32, value);
|
|
s->creadr = 0;
|
|
s->cwriter = s->creadr;
|
|
}
|
|
break;
|
|
case GITS_CBASER + 4:
|
|
/*
|
|
* IMPDEF choice:- GITS_CBASER register becomes RO if ITS is
|
|
* already enabled
|
|
*/
|
|
if (!(s->ctlr & ITS_CTLR_ENABLED)) {
|
|
s->cbaser = deposit64(s->cbaser, 32, 32, value);
|
|
s->creadr = 0;
|
|
s->cwriter = s->creadr;
|
|
}
|
|
break;
|
|
case GITS_CWRITER:
|
|
s->cwriter = deposit64(s->cwriter, 0, 32,
|
|
(value & ~R_GITS_CWRITER_RETRY_MASK));
|
|
if (s->cwriter != s->creadr) {
|
|
process_cmdq(s);
|
|
}
|
|
break;
|
|
case GITS_CWRITER + 4:
|
|
s->cwriter = deposit64(s->cwriter, 32, 32, value);
|
|
break;
|
|
case GITS_CREADR:
|
|
if (s->gicv3->gicd_ctlr & GICD_CTLR_DS) {
|
|
s->creadr = deposit64(s->creadr, 0, 32,
|
|
(value & ~R_GITS_CREADR_STALLED_MASK));
|
|
} else {
|
|
/* RO register, ignore the write */
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid guest write to RO register at offset "
|
|
TARGET_FMT_plx "\n", __func__, offset);
|
|
}
|
|
break;
|
|
case GITS_CREADR + 4:
|
|
if (s->gicv3->gicd_ctlr & GICD_CTLR_DS) {
|
|
s->creadr = deposit64(s->creadr, 32, 32, value);
|
|
} else {
|
|
/* RO register, ignore the write */
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid guest write to RO register at offset "
|
|
TARGET_FMT_plx "\n", __func__, offset);
|
|
}
|
|
break;
|
|
case GITS_BASER ... GITS_BASER + 0x3f:
|
|
/*
|
|
* IMPDEF choice:- GITS_BASERn register becomes RO if ITS is
|
|
* already enabled
|
|
*/
|
|
if (!(s->ctlr & ITS_CTLR_ENABLED)) {
|
|
index = (offset - GITS_BASER) / 8;
|
|
|
|
if (offset & 7) {
|
|
value <<= 32;
|
|
value &= ~GITS_BASER_RO_MASK;
|
|
s->baser[index] &= GITS_BASER_RO_MASK | MAKE_64BIT_MASK(0, 32);
|
|
s->baser[index] |= value;
|
|
} else {
|
|
value &= ~GITS_BASER_RO_MASK;
|
|
s->baser[index] &= GITS_BASER_RO_MASK | MAKE_64BIT_MASK(32, 32);
|
|
s->baser[index] |= value;
|
|
}
|
|
}
|
|
break;
|
|
case GITS_IIDR:
|
|
case GITS_IDREGS ... GITS_IDREGS + 0x2f:
|
|
/* RO registers, ignore the write */
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid guest write to RO register at offset "
|
|
TARGET_FMT_plx "\n", __func__, offset);
|
|
break;
|
|
default:
|
|
result = false;
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static bool its_readl(GICv3ITSState *s, hwaddr offset,
|
|
uint64_t *data, MemTxAttrs attrs)
|
|
{
|
|
bool result = true;
|
|
int index;
|
|
|
|
switch (offset) {
|
|
case GITS_CTLR:
|
|
*data = s->ctlr;
|
|
break;
|
|
case GITS_IIDR:
|
|
*data = gicv3_iidr();
|
|
break;
|
|
case GITS_IDREGS ... GITS_IDREGS + 0x2f:
|
|
/* ID registers */
|
|
*data = gicv3_idreg(offset - GITS_IDREGS);
|
|
break;
|
|
case GITS_TYPER:
|
|
*data = extract64(s->typer, 0, 32);
|
|
break;
|
|
case GITS_TYPER + 4:
|
|
*data = extract64(s->typer, 32, 32);
|
|
break;
|
|
case GITS_CBASER:
|
|
*data = extract64(s->cbaser, 0, 32);
|
|
break;
|
|
case GITS_CBASER + 4:
|
|
*data = extract64(s->cbaser, 32, 32);
|
|
break;
|
|
case GITS_CREADR:
|
|
*data = extract64(s->creadr, 0, 32);
|
|
break;
|
|
case GITS_CREADR + 4:
|
|
*data = extract64(s->creadr, 32, 32);
|
|
break;
|
|
case GITS_CWRITER:
|
|
*data = extract64(s->cwriter, 0, 32);
|
|
break;
|
|
case GITS_CWRITER + 4:
|
|
*data = extract64(s->cwriter, 32, 32);
|
|
break;
|
|
case GITS_BASER ... GITS_BASER + 0x3f:
|
|
index = (offset - GITS_BASER) / 8;
|
|
if (offset & 7) {
|
|
*data = extract64(s->baser[index], 32, 32);
|
|
} else {
|
|
*data = extract64(s->baser[index], 0, 32);
|
|
}
|
|
break;
|
|
default:
|
|
result = false;
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static bool its_writell(GICv3ITSState *s, hwaddr offset,
|
|
uint64_t value, MemTxAttrs attrs)
|
|
{
|
|
bool result = true;
|
|
int index;
|
|
|
|
switch (offset) {
|
|
case GITS_BASER ... GITS_BASER + 0x3f:
|
|
/*
|
|
* IMPDEF choice:- GITS_BASERn register becomes RO if ITS is
|
|
* already enabled
|
|
*/
|
|
if (!(s->ctlr & ITS_CTLR_ENABLED)) {
|
|
index = (offset - GITS_BASER) / 8;
|
|
s->baser[index] &= GITS_BASER_RO_MASK;
|
|
s->baser[index] |= (value & ~GITS_BASER_RO_MASK);
|
|
}
|
|
break;
|
|
case GITS_CBASER:
|
|
/*
|
|
* IMPDEF choice:- GITS_CBASER register becomes RO if ITS is
|
|
* already enabled
|
|
*/
|
|
if (!(s->ctlr & ITS_CTLR_ENABLED)) {
|
|
s->cbaser = value;
|
|
s->creadr = 0;
|
|
s->cwriter = s->creadr;
|
|
}
|
|
break;
|
|
case GITS_CWRITER:
|
|
s->cwriter = value & ~R_GITS_CWRITER_RETRY_MASK;
|
|
if (s->cwriter != s->creadr) {
|
|
process_cmdq(s);
|
|
}
|
|
break;
|
|
case GITS_CREADR:
|
|
if (s->gicv3->gicd_ctlr & GICD_CTLR_DS) {
|
|
s->creadr = value & ~R_GITS_CREADR_STALLED_MASK;
|
|
} else {
|
|
/* RO register, ignore the write */
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid guest write to RO register at offset "
|
|
TARGET_FMT_plx "\n", __func__, offset);
|
|
}
|
|
break;
|
|
case GITS_TYPER:
|
|
/* RO registers, ignore the write */
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid guest write to RO register at offset "
|
|
TARGET_FMT_plx "\n", __func__, offset);
|
|
break;
|
|
default:
|
|
result = false;
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static bool its_readll(GICv3ITSState *s, hwaddr offset,
|
|
uint64_t *data, MemTxAttrs attrs)
|
|
{
|
|
bool result = true;
|
|
int index;
|
|
|
|
switch (offset) {
|
|
case GITS_TYPER:
|
|
*data = s->typer;
|
|
break;
|
|
case GITS_BASER ... GITS_BASER + 0x3f:
|
|
index = (offset - GITS_BASER) / 8;
|
|
*data = s->baser[index];
|
|
break;
|
|
case GITS_CBASER:
|
|
*data = s->cbaser;
|
|
break;
|
|
case GITS_CREADR:
|
|
*data = s->creadr;
|
|
break;
|
|
case GITS_CWRITER:
|
|
*data = s->cwriter;
|
|
break;
|
|
default:
|
|
result = false;
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
static MemTxResult gicv3_its_read(void *opaque, hwaddr offset, uint64_t *data,
|
|
unsigned size, MemTxAttrs attrs)
|
|
{
|
|
GICv3ITSState *s = (GICv3ITSState *)opaque;
|
|
bool result;
|
|
|
|
switch (size) {
|
|
case 4:
|
|
result = its_readl(s, offset, data, attrs);
|
|
break;
|
|
case 8:
|
|
result = its_readll(s, offset, data, attrs);
|
|
break;
|
|
default:
|
|
result = false;
|
|
break;
|
|
}
|
|
|
|
if (!result) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid guest read at offset " TARGET_FMT_plx
|
|
"size %u\n", __func__, offset, size);
|
|
/*
|
|
* The spec requires that reserved registers are RAZ/WI;
|
|
* so use false returns from leaf functions as a way to
|
|
* trigger the guest-error logging but don't return it to
|
|
* the caller, or we'll cause a spurious guest data abort.
|
|
*/
|
|
*data = 0;
|
|
}
|
|
return MEMTX_OK;
|
|
}
|
|
|
|
static MemTxResult gicv3_its_write(void *opaque, hwaddr offset, uint64_t data,
|
|
unsigned size, MemTxAttrs attrs)
|
|
{
|
|
GICv3ITSState *s = (GICv3ITSState *)opaque;
|
|
bool result;
|
|
|
|
switch (size) {
|
|
case 4:
|
|
result = its_writel(s, offset, data, attrs);
|
|
break;
|
|
case 8:
|
|
result = its_writell(s, offset, data, attrs);
|
|
break;
|
|
default:
|
|
result = false;
|
|
break;
|
|
}
|
|
|
|
if (!result) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"%s: invalid guest write at offset " TARGET_FMT_plx
|
|
"size %u\n", __func__, offset, size);
|
|
/*
|
|
* The spec requires that reserved registers are RAZ/WI;
|
|
* so use false returns from leaf functions as a way to
|
|
* trigger the guest-error logging but don't return it to
|
|
* the caller, or we'll cause a spurious guest data abort.
|
|
*/
|
|
}
|
|
return MEMTX_OK;
|
|
}
|
|
|
|
static const MemoryRegionOps gicv3_its_control_ops = {
|
|
.read_with_attrs = gicv3_its_read,
|
|
.write_with_attrs = gicv3_its_write,
|
|
.valid.min_access_size = 4,
|
|
.valid.max_access_size = 8,
|
|
.impl.min_access_size = 4,
|
|
.impl.max_access_size = 8,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
};
|
|
|
|
static const MemoryRegionOps gicv3_its_translation_ops = {
|
|
.write_with_attrs = gicv3_its_translation_write,
|
|
.valid.min_access_size = 2,
|
|
.valid.max_access_size = 4,
|
|
.impl.min_access_size = 2,
|
|
.impl.max_access_size = 4,
|
|
.endianness = DEVICE_NATIVE_ENDIAN,
|
|
};
|
|
|
|
static void gicv3_arm_its_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
|
|
int i;
|
|
|
|
for (i = 0; i < s->gicv3->num_cpu; i++) {
|
|
if (!(s->gicv3->cpu[i].gicr_typer & GICR_TYPER_PLPIS)) {
|
|
error_setg(errp, "Physical LPI not supported by CPU %d", i);
|
|
return;
|
|
}
|
|
}
|
|
|
|
gicv3_its_init_mmio(s, &gicv3_its_control_ops, &gicv3_its_translation_ops);
|
|
|
|
address_space_init(&s->gicv3->dma_as, s->gicv3->dma,
|
|
"gicv3-its-sysmem");
|
|
|
|
/* set the ITS default features supported */
|
|
s->typer = FIELD_DP64(s->typer, GITS_TYPER, PHYSICAL,
|
|
GITS_TYPE_PHYSICAL);
|
|
s->typer = FIELD_DP64(s->typer, GITS_TYPER, ITT_ENTRY_SIZE,
|
|
ITS_ITT_ENTRY_SIZE - 1);
|
|
s->typer = FIELD_DP64(s->typer, GITS_TYPER, IDBITS, ITS_IDBITS);
|
|
s->typer = FIELD_DP64(s->typer, GITS_TYPER, DEVBITS, ITS_DEVBITS);
|
|
s->typer = FIELD_DP64(s->typer, GITS_TYPER, CIL, 1);
|
|
s->typer = FIELD_DP64(s->typer, GITS_TYPER, CIDBITS, ITS_CIDBITS);
|
|
}
|
|
|
|
static void gicv3_its_reset(DeviceState *dev)
|
|
{
|
|
GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev);
|
|
GICv3ITSClass *c = ARM_GICV3_ITS_GET_CLASS(s);
|
|
|
|
c->parent_reset(dev);
|
|
|
|
/* Quiescent bit reset to 1 */
|
|
s->ctlr = FIELD_DP32(s->ctlr, GITS_CTLR, QUIESCENT, 1);
|
|
|
|
/*
|
|
* setting GITS_BASER0.Type = 0b001 (Device)
|
|
* GITS_BASER1.Type = 0b100 (Collection Table)
|
|
* GITS_BASER<n>.Type,where n = 3 to 7 are 0b00 (Unimplemented)
|
|
* GITS_BASER<0,1>.Page_Size = 64KB
|
|
* and default translation table entry size to 16 bytes
|
|
*/
|
|
s->baser[0] = FIELD_DP64(s->baser[0], GITS_BASER, TYPE,
|
|
GITS_BASER_TYPE_DEVICE);
|
|
s->baser[0] = FIELD_DP64(s->baser[0], GITS_BASER, PAGESIZE,
|
|
GITS_BASER_PAGESIZE_64K);
|
|
s->baser[0] = FIELD_DP64(s->baser[0], GITS_BASER, ENTRYSIZE,
|
|
GITS_DTE_SIZE - 1);
|
|
|
|
s->baser[1] = FIELD_DP64(s->baser[1], GITS_BASER, TYPE,
|
|
GITS_BASER_TYPE_COLLECTION);
|
|
s->baser[1] = FIELD_DP64(s->baser[1], GITS_BASER, PAGESIZE,
|
|
GITS_BASER_PAGESIZE_64K);
|
|
s->baser[1] = FIELD_DP64(s->baser[1], GITS_BASER, ENTRYSIZE,
|
|
GITS_CTE_SIZE - 1);
|
|
}
|
|
|
|
static void gicv3_its_post_load(GICv3ITSState *s)
|
|
{
|
|
if (s->ctlr & ITS_CTLR_ENABLED) {
|
|
extract_table_params(s);
|
|
extract_cmdq_params(s);
|
|
}
|
|
}
|
|
|
|
static Property gicv3_its_props[] = {
|
|
DEFINE_PROP_LINK("parent-gicv3", GICv3ITSState, gicv3, "arm-gicv3",
|
|
GICv3State *),
|
|
DEFINE_PROP_END_OF_LIST(),
|
|
};
|
|
|
|
static void gicv3_its_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
GICv3ITSClass *ic = ARM_GICV3_ITS_CLASS(klass);
|
|
GICv3ITSCommonClass *icc = ARM_GICV3_ITS_COMMON_CLASS(klass);
|
|
|
|
dc->realize = gicv3_arm_its_realize;
|
|
device_class_set_props(dc, gicv3_its_props);
|
|
device_class_set_parent_reset(dc, gicv3_its_reset, &ic->parent_reset);
|
|
icc->post_load = gicv3_its_post_load;
|
|
}
|
|
|
|
static const TypeInfo gicv3_its_info = {
|
|
.name = TYPE_ARM_GICV3_ITS,
|
|
.parent = TYPE_ARM_GICV3_ITS_COMMON,
|
|
.instance_size = sizeof(GICv3ITSState),
|
|
.class_init = gicv3_its_class_init,
|
|
.class_size = sizeof(GICv3ITSClass),
|
|
};
|
|
|
|
static void gicv3_its_register_types(void)
|
|
{
|
|
type_register_static(&gicv3_its_info);
|
|
}
|
|
|
|
type_init(gicv3_its_register_types)
|