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qemu/hw/intc/riscv_aplic.c
Frank Chang 078189b327 hw/intc: Update APLIC IDC after claiming iforce register 
Currently, QEMU only sets the iforce register to 0 and returns early
when claiming the iforce register. However, this may leave mip.meip
remains at 1 if a spurious external interrupt triggered by iforce
register is the only pending interrupt to be claimed, and the interrupt
cannot be lowered as expected.

This commit fixes this issue by calling riscv_aplic_idc_update() to
update the IDC status after the iforce register is claimed.

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Jim Shu <jim.shu@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-ID: <20240321104951.12104-1-frank.chang@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2024-03-22 15:29:44 +10:00

1025 lines
34 KiB
C
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/*
* RISC-V APLIC (Advanced Platform Level Interrupt Controller)
*
* Copyright (c) 2021 Western Digital Corporation or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2 or later, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qemu/error-report.h"
#include "qemu/bswap.h"
#include "exec/address-spaces.h"
#include "hw/sysbus.h"
#include "hw/pci/msi.h"
#include "hw/boards.h"
#include "hw/qdev-properties.h"
#include "hw/intc/riscv_aplic.h"
#include "hw/irq.h"
#include "target/riscv/cpu.h"
#include "sysemu/sysemu.h"
#include "sysemu/kvm.h"
#include "kvm/kvm_riscv.h"
#include "migration/vmstate.h"
#define APLIC_MAX_IDC (1UL << 14)
#define APLIC_MAX_SOURCE 1024
#define APLIC_MIN_IPRIO_BITS 1
#define APLIC_MAX_IPRIO_BITS 8
#define APLIC_MAX_CHILDREN 1024
#define APLIC_DOMAINCFG 0x0000
#define APLIC_DOMAINCFG_RDONLY 0x80000000
#define APLIC_DOMAINCFG_IE (1 << 8)
#define APLIC_DOMAINCFG_DM (1 << 2)
#define APLIC_DOMAINCFG_BE (1 << 0)
#define APLIC_SOURCECFG_BASE 0x0004
#define APLIC_SOURCECFG_D (1 << 10)
#define APLIC_SOURCECFG_CHILDIDX_MASK 0x000003ff
#define APLIC_SOURCECFG_SM_MASK 0x00000007
#define APLIC_SOURCECFG_SM_INACTIVE 0x0
#define APLIC_SOURCECFG_SM_DETACH 0x1
#define APLIC_SOURCECFG_SM_EDGE_RISE 0x4
#define APLIC_SOURCECFG_SM_EDGE_FALL 0x5
#define APLIC_SOURCECFG_SM_LEVEL_HIGH 0x6
#define APLIC_SOURCECFG_SM_LEVEL_LOW 0x7
#define APLIC_MMSICFGADDR 0x1bc0
#define APLIC_MMSICFGADDRH 0x1bc4
#define APLIC_SMSICFGADDR 0x1bc8
#define APLIC_SMSICFGADDRH 0x1bcc
#define APLIC_xMSICFGADDRH_L (1UL << 31)
#define APLIC_xMSICFGADDRH_HHXS_MASK 0x1f
#define APLIC_xMSICFGADDRH_HHXS_SHIFT 24
#define APLIC_xMSICFGADDRH_LHXS_MASK 0x7
#define APLIC_xMSICFGADDRH_LHXS_SHIFT 20
#define APLIC_xMSICFGADDRH_HHXW_MASK 0x7
#define APLIC_xMSICFGADDRH_HHXW_SHIFT 16
#define APLIC_xMSICFGADDRH_LHXW_MASK 0xf
#define APLIC_xMSICFGADDRH_LHXW_SHIFT 12
#define APLIC_xMSICFGADDRH_BAPPN_MASK 0xfff
#define APLIC_xMSICFGADDR_PPN_SHIFT 12
#define APLIC_xMSICFGADDR_PPN_HART(__lhxs) \
((1UL << (__lhxs)) - 1)
#define APLIC_xMSICFGADDR_PPN_LHX_MASK(__lhxw) \
((1UL << (__lhxw)) - 1)
#define APLIC_xMSICFGADDR_PPN_LHX_SHIFT(__lhxs) \
((__lhxs))
#define APLIC_xMSICFGADDR_PPN_LHX(__lhxw, __lhxs) \
(APLIC_xMSICFGADDR_PPN_LHX_MASK(__lhxw) << \
APLIC_xMSICFGADDR_PPN_LHX_SHIFT(__lhxs))
#define APLIC_xMSICFGADDR_PPN_HHX_MASK(__hhxw) \
((1UL << (__hhxw)) - 1)
#define APLIC_xMSICFGADDR_PPN_HHX_SHIFT(__hhxs) \
((__hhxs) + APLIC_xMSICFGADDR_PPN_SHIFT)
#define APLIC_xMSICFGADDR_PPN_HHX(__hhxw, __hhxs) \
(APLIC_xMSICFGADDR_PPN_HHX_MASK(__hhxw) << \
APLIC_xMSICFGADDR_PPN_HHX_SHIFT(__hhxs))
#define APLIC_xMSICFGADDRH_VALID_MASK \
(APLIC_xMSICFGADDRH_L | \
(APLIC_xMSICFGADDRH_HHXS_MASK << APLIC_xMSICFGADDRH_HHXS_SHIFT) | \
(APLIC_xMSICFGADDRH_LHXS_MASK << APLIC_xMSICFGADDRH_LHXS_SHIFT) | \
(APLIC_xMSICFGADDRH_HHXW_MASK << APLIC_xMSICFGADDRH_HHXW_SHIFT) | \
(APLIC_xMSICFGADDRH_LHXW_MASK << APLIC_xMSICFGADDRH_LHXW_SHIFT) | \
APLIC_xMSICFGADDRH_BAPPN_MASK)
#define APLIC_SETIP_BASE 0x1c00
#define APLIC_SETIPNUM 0x1cdc
#define APLIC_CLRIP_BASE 0x1d00
#define APLIC_CLRIPNUM 0x1ddc
#define APLIC_SETIE_BASE 0x1e00
#define APLIC_SETIENUM 0x1edc
#define APLIC_CLRIE_BASE 0x1f00
#define APLIC_CLRIENUM 0x1fdc
#define APLIC_SETIPNUM_LE 0x2000
#define APLIC_SETIPNUM_BE 0x2004
#define APLIC_ISTATE_PENDING (1U << 0)
#define APLIC_ISTATE_ENABLED (1U << 1)
#define APLIC_ISTATE_ENPEND (APLIC_ISTATE_ENABLED | \
APLIC_ISTATE_PENDING)
#define APLIC_ISTATE_INPUT (1U << 8)
#define APLIC_GENMSI 0x3000
#define APLIC_TARGET_BASE 0x3004
#define APLIC_TARGET_HART_IDX_SHIFT 18
#define APLIC_TARGET_HART_IDX_MASK 0x3fff
#define APLIC_TARGET_GUEST_IDX_SHIFT 12
#define APLIC_TARGET_GUEST_IDX_MASK 0x3f
#define APLIC_TARGET_IPRIO_MASK 0xff
#define APLIC_TARGET_EIID_MASK 0x7ff
#define APLIC_IDC_BASE 0x4000
#define APLIC_IDC_SIZE 32
#define APLIC_IDC_IDELIVERY 0x00
#define APLIC_IDC_IFORCE 0x04
#define APLIC_IDC_ITHRESHOLD 0x08
#define APLIC_IDC_TOPI 0x18
#define APLIC_IDC_TOPI_ID_SHIFT 16
#define APLIC_IDC_TOPI_ID_MASK 0x3ff
#define APLIC_IDC_TOPI_PRIO_MASK 0xff
#define APLIC_IDC_CLAIMI 0x1c
/*
* KVM AIA only supports APLIC MSI, fallback to QEMU emulation if we want to use
* APLIC Wired.
*/
static bool is_kvm_aia(bool msimode)
{
return kvm_irqchip_in_kernel() && msimode;
}
static uint32_t riscv_aplic_read_input_word(RISCVAPLICState *aplic,
uint32_t word)
{
uint32_t i, irq, sourcecfg, sm, raw_input, irq_inverted, ret = 0;
for (i = 0; i < 32; i++) {
irq = word * 32 + i;
if (!irq || aplic->num_irqs <= irq) {
continue;
}
sourcecfg = aplic->sourcecfg[irq];
if (sourcecfg & APLIC_SOURCECFG_D) {
continue;
}
sm = sourcecfg & APLIC_SOURCECFG_SM_MASK;
if (sm == APLIC_SOURCECFG_SM_INACTIVE) {
continue;
}
raw_input = (aplic->state[irq] & APLIC_ISTATE_INPUT) ? 1 : 0;
irq_inverted = (sm == APLIC_SOURCECFG_SM_LEVEL_LOW ||
sm == APLIC_SOURCECFG_SM_EDGE_FALL) ? 1 : 0;
ret |= (raw_input ^ irq_inverted) << i;
}
return ret;
}
static uint32_t riscv_aplic_read_pending_word(RISCVAPLICState *aplic,
uint32_t word)
{
uint32_t i, irq, ret = 0;
for (i = 0; i < 32; i++) {
irq = word * 32 + i;
if (!irq || aplic->num_irqs <= irq) {
continue;
}
ret |= ((aplic->state[irq] & APLIC_ISTATE_PENDING) ? 1 : 0) << i;
}
return ret;
}
static void riscv_aplic_set_pending_raw(RISCVAPLICState *aplic,
uint32_t irq, bool pending)
{
if (pending) {
aplic->state[irq] |= APLIC_ISTATE_PENDING;
} else {
aplic->state[irq] &= ~APLIC_ISTATE_PENDING;
}
}
static void riscv_aplic_set_pending(RISCVAPLICState *aplic,
uint32_t irq, bool pending)
{
uint32_t sourcecfg, sm;
if ((irq <= 0) || (aplic->num_irqs <= irq)) {
return;
}
sourcecfg = aplic->sourcecfg[irq];
if (sourcecfg & APLIC_SOURCECFG_D) {
return;
}
sm = sourcecfg & APLIC_SOURCECFG_SM_MASK;
if (sm == APLIC_SOURCECFG_SM_INACTIVE) {
return;
}
if ((sm == APLIC_SOURCECFG_SM_LEVEL_HIGH) ||
(sm == APLIC_SOURCECFG_SM_LEVEL_LOW)) {
if (!aplic->msimode || (aplic->msimode && !pending)) {
return;
}
if ((aplic->state[irq] & APLIC_ISTATE_INPUT) &&
(sm == APLIC_SOURCECFG_SM_LEVEL_LOW)) {
return;
}
if (!(aplic->state[irq] & APLIC_ISTATE_INPUT) &&
(sm == APLIC_SOURCECFG_SM_LEVEL_HIGH)) {
return;
}
}
riscv_aplic_set_pending_raw(aplic, irq, pending);
}
static void riscv_aplic_set_pending_word(RISCVAPLICState *aplic,
uint32_t word, uint32_t value,
bool pending)
{
uint32_t i, irq;
for (i = 0; i < 32; i++) {
irq = word * 32 + i;
if (!irq || aplic->num_irqs <= irq) {
continue;
}
if (value & (1U << i)) {
riscv_aplic_set_pending(aplic, irq, pending);
}
}
}
static uint32_t riscv_aplic_read_enabled_word(RISCVAPLICState *aplic,
int word)
{
uint32_t i, irq, ret = 0;
for (i = 0; i < 32; i++) {
irq = word * 32 + i;
if (!irq || aplic->num_irqs <= irq) {
continue;
}
ret |= ((aplic->state[irq] & APLIC_ISTATE_ENABLED) ? 1 : 0) << i;
}
return ret;
}
static void riscv_aplic_set_enabled_raw(RISCVAPLICState *aplic,
uint32_t irq, bool enabled)
{
if (enabled) {
aplic->state[irq] |= APLIC_ISTATE_ENABLED;
} else {
aplic->state[irq] &= ~APLIC_ISTATE_ENABLED;
}
}
static void riscv_aplic_set_enabled(RISCVAPLICState *aplic,
uint32_t irq, bool enabled)
{
uint32_t sourcecfg, sm;
if ((irq <= 0) || (aplic->num_irqs <= irq)) {
return;
}
sourcecfg = aplic->sourcecfg[irq];
if (sourcecfg & APLIC_SOURCECFG_D) {
return;
}
sm = sourcecfg & APLIC_SOURCECFG_SM_MASK;
if (sm == APLIC_SOURCECFG_SM_INACTIVE) {
return;
}
riscv_aplic_set_enabled_raw(aplic, irq, enabled);
}
static void riscv_aplic_set_enabled_word(RISCVAPLICState *aplic,
uint32_t word, uint32_t value,
bool enabled)
{
uint32_t i, irq;
for (i = 0; i < 32; i++) {
irq = word * 32 + i;
if (!irq || aplic->num_irqs <= irq) {
continue;
}
if (value & (1U << i)) {
riscv_aplic_set_enabled(aplic, irq, enabled);
}
}
}
static void riscv_aplic_msi_send(RISCVAPLICState *aplic,
uint32_t hart_idx, uint32_t guest_idx,
uint32_t eiid)
{
uint64_t addr;
MemTxResult result;
RISCVAPLICState *aplic_m;
uint32_t lhxs, lhxw, hhxs, hhxw, group_idx, msicfgaddr, msicfgaddrH;
aplic_m = aplic;
while (aplic_m && !aplic_m->mmode) {
aplic_m = aplic_m->parent;
}
if (!aplic_m) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: m-level APLIC not found\n",
__func__);
return;
}
if (aplic->mmode) {
msicfgaddr = aplic_m->mmsicfgaddr;
msicfgaddrH = aplic_m->mmsicfgaddrH;
} else {
msicfgaddr = aplic_m->smsicfgaddr;
msicfgaddrH = aplic_m->smsicfgaddrH;
}
lhxs = (msicfgaddrH >> APLIC_xMSICFGADDRH_LHXS_SHIFT) &
APLIC_xMSICFGADDRH_LHXS_MASK;
lhxw = (msicfgaddrH >> APLIC_xMSICFGADDRH_LHXW_SHIFT) &
APLIC_xMSICFGADDRH_LHXW_MASK;
hhxs = (msicfgaddrH >> APLIC_xMSICFGADDRH_HHXS_SHIFT) &
APLIC_xMSICFGADDRH_HHXS_MASK;
hhxw = (msicfgaddrH >> APLIC_xMSICFGADDRH_HHXW_SHIFT) &
APLIC_xMSICFGADDRH_HHXW_MASK;
group_idx = hart_idx >> lhxw;
hart_idx &= APLIC_xMSICFGADDR_PPN_LHX_MASK(lhxw);
addr = msicfgaddr;
addr |= ((uint64_t)(msicfgaddrH & APLIC_xMSICFGADDRH_BAPPN_MASK)) << 32;
addr |= ((uint64_t)(group_idx & APLIC_xMSICFGADDR_PPN_HHX_MASK(hhxw))) <<
APLIC_xMSICFGADDR_PPN_HHX_SHIFT(hhxs);
addr |= ((uint64_t)(hart_idx & APLIC_xMSICFGADDR_PPN_LHX_MASK(lhxw))) <<
APLIC_xMSICFGADDR_PPN_LHX_SHIFT(lhxs);
addr |= (uint64_t)(guest_idx & APLIC_xMSICFGADDR_PPN_HART(lhxs));
addr <<= APLIC_xMSICFGADDR_PPN_SHIFT;
address_space_stl_le(&address_space_memory, addr,
eiid, MEMTXATTRS_UNSPECIFIED, &result);
if (result != MEMTX_OK) {
qemu_log_mask(LOG_GUEST_ERROR, "%s: MSI write failed for "
"hart_index=%d guest_index=%d eiid=%d\n",
__func__, hart_idx, guest_idx, eiid);
}
}
static void riscv_aplic_msi_irq_update(RISCVAPLICState *aplic, uint32_t irq)
{
uint32_t hart_idx, guest_idx, eiid;
if (!aplic->msimode || (aplic->num_irqs <= irq) ||
!(aplic->domaincfg & APLIC_DOMAINCFG_IE)) {
return;
}
if ((aplic->state[irq] & APLIC_ISTATE_ENPEND) != APLIC_ISTATE_ENPEND) {
return;
}
riscv_aplic_set_pending_raw(aplic, irq, false);
hart_idx = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT;
hart_idx &= APLIC_TARGET_HART_IDX_MASK;
if (aplic->mmode) {
/* M-level APLIC ignores guest_index */
guest_idx = 0;
} else {
guest_idx = aplic->target[irq] >> APLIC_TARGET_GUEST_IDX_SHIFT;
guest_idx &= APLIC_TARGET_GUEST_IDX_MASK;
}
eiid = aplic->target[irq] & APLIC_TARGET_EIID_MASK;
riscv_aplic_msi_send(aplic, hart_idx, guest_idx, eiid);
}
static uint32_t riscv_aplic_idc_topi(RISCVAPLICState *aplic, uint32_t idc)
{
uint32_t best_irq, best_iprio;
uint32_t irq, iprio, ihartidx, ithres;
if (aplic->num_harts <= idc) {
return 0;
}
ithres = aplic->ithreshold[idc];
best_irq = best_iprio = UINT32_MAX;
for (irq = 1; irq < aplic->num_irqs; irq++) {
if ((aplic->state[irq] & APLIC_ISTATE_ENPEND) !=
APLIC_ISTATE_ENPEND) {
continue;
}
ihartidx = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT;
ihartidx &= APLIC_TARGET_HART_IDX_MASK;
if (ihartidx != idc) {
continue;
}
iprio = aplic->target[irq] & aplic->iprio_mask;
if (ithres && iprio >= ithres) {
continue;
}
if (iprio < best_iprio) {
best_irq = irq;
best_iprio = iprio;
}
}
if (best_irq < aplic->num_irqs && best_iprio <= aplic->iprio_mask) {
return (best_irq << APLIC_IDC_TOPI_ID_SHIFT) | best_iprio;
}
return 0;
}
static void riscv_aplic_idc_update(RISCVAPLICState *aplic, uint32_t idc)
{
uint32_t topi;
if (aplic->msimode || aplic->num_harts <= idc) {
return;
}
topi = riscv_aplic_idc_topi(aplic, idc);
if ((aplic->domaincfg & APLIC_DOMAINCFG_IE) &&
aplic->idelivery[idc] &&
(aplic->iforce[idc] || topi)) {
qemu_irq_raise(aplic->external_irqs[idc]);
} else {
qemu_irq_lower(aplic->external_irqs[idc]);
}
}
static uint32_t riscv_aplic_idc_claimi(RISCVAPLICState *aplic, uint32_t idc)
{
uint32_t irq, state, sm, topi = riscv_aplic_idc_topi(aplic, idc);
if (!topi) {
aplic->iforce[idc] = 0;
riscv_aplic_idc_update(aplic, idc);
return 0;
}
irq = (topi >> APLIC_IDC_TOPI_ID_SHIFT) & APLIC_IDC_TOPI_ID_MASK;
sm = aplic->sourcecfg[irq] & APLIC_SOURCECFG_SM_MASK;
state = aplic->state[irq];
riscv_aplic_set_pending_raw(aplic, irq, false);
if ((sm == APLIC_SOURCECFG_SM_LEVEL_HIGH) &&
(state & APLIC_ISTATE_INPUT)) {
riscv_aplic_set_pending_raw(aplic, irq, true);
} else if ((sm == APLIC_SOURCECFG_SM_LEVEL_LOW) &&
!(state & APLIC_ISTATE_INPUT)) {
riscv_aplic_set_pending_raw(aplic, irq, true);
}
riscv_aplic_idc_update(aplic, idc);
return topi;
}
static void riscv_aplic_request(void *opaque, int irq, int level)
{
bool update = false;
RISCVAPLICState *aplic = opaque;
uint32_t sourcecfg, childidx, state, idc;
assert((0 < irq) && (irq < aplic->num_irqs));
sourcecfg = aplic->sourcecfg[irq];
if (sourcecfg & APLIC_SOURCECFG_D) {
childidx = sourcecfg & APLIC_SOURCECFG_CHILDIDX_MASK;
if (childidx < aplic->num_children) {
riscv_aplic_request(aplic->children[childidx], irq, level);
}
return;
}
state = aplic->state[irq];
switch (sourcecfg & APLIC_SOURCECFG_SM_MASK) {
case APLIC_SOURCECFG_SM_EDGE_RISE:
if ((level > 0) && !(state & APLIC_ISTATE_INPUT) &&
!(state & APLIC_ISTATE_PENDING)) {
riscv_aplic_set_pending_raw(aplic, irq, true);
update = true;
}
break;
case APLIC_SOURCECFG_SM_EDGE_FALL:
if ((level <= 0) && (state & APLIC_ISTATE_INPUT) &&
!(state & APLIC_ISTATE_PENDING)) {
riscv_aplic_set_pending_raw(aplic, irq, true);
update = true;
}
break;
case APLIC_SOURCECFG_SM_LEVEL_HIGH:
if ((level > 0) && !(state & APLIC_ISTATE_PENDING)) {
riscv_aplic_set_pending_raw(aplic, irq, true);
update = true;
}
break;
case APLIC_SOURCECFG_SM_LEVEL_LOW:
if ((level <= 0) && !(state & APLIC_ISTATE_PENDING)) {
riscv_aplic_set_pending_raw(aplic, irq, true);
update = true;
}
break;
default:
break;
}
if (level <= 0) {
aplic->state[irq] &= ~APLIC_ISTATE_INPUT;
} else {
aplic->state[irq] |= APLIC_ISTATE_INPUT;
}
if (update) {
if (aplic->msimode) {
riscv_aplic_msi_irq_update(aplic, irq);
} else {
idc = aplic->target[irq] >> APLIC_TARGET_HART_IDX_SHIFT;
idc &= APLIC_TARGET_HART_IDX_MASK;
riscv_aplic_idc_update(aplic, idc);
}
}
}
static uint64_t riscv_aplic_read(void *opaque, hwaddr addr, unsigned size)
{
uint32_t irq, word, idc;
RISCVAPLICState *aplic = opaque;
/* Reads must be 4 byte words */
if ((addr & 0x3) != 0) {
goto err;
}
if (addr == APLIC_DOMAINCFG) {
return APLIC_DOMAINCFG_RDONLY | aplic->domaincfg |
(aplic->msimode ? APLIC_DOMAINCFG_DM : 0);
} else if ((APLIC_SOURCECFG_BASE <= addr) &&
(addr < (APLIC_SOURCECFG_BASE + (aplic->num_irqs - 1) * 4))) {
irq = ((addr - APLIC_SOURCECFG_BASE) >> 2) + 1;
return aplic->sourcecfg[irq];
} else if (aplic->mmode && aplic->msimode &&
(addr == APLIC_MMSICFGADDR)) {
return aplic->mmsicfgaddr;
} else if (aplic->mmode && aplic->msimode &&
(addr == APLIC_MMSICFGADDRH)) {
return aplic->mmsicfgaddrH;
} else if (aplic->mmode && aplic->msimode &&
(addr == APLIC_SMSICFGADDR)) {
/*
* Registers SMSICFGADDR and SMSICFGADDRH are implemented only if:
* (a) the interrupt domain is at machine level
* (b) the domain's harts implement supervisor mode
* (c) the domain has one or more child supervisor-level domains
* that support MSI delivery mode (domaincfg.DM is not read-
* only zero in at least one of the supervisor-level child
* domains).
*/
return (aplic->num_children) ? aplic->smsicfgaddr : 0;
} else if (aplic->mmode && aplic->msimode &&
(addr == APLIC_SMSICFGADDRH)) {
return (aplic->num_children) ? aplic->smsicfgaddrH : 0;
} else if ((APLIC_SETIP_BASE <= addr) &&
(addr < (APLIC_SETIP_BASE + aplic->bitfield_words * 4))) {
word = (addr - APLIC_SETIP_BASE) >> 2;
return riscv_aplic_read_pending_word(aplic, word);
} else if (addr == APLIC_SETIPNUM) {
return 0;
} else if ((APLIC_CLRIP_BASE <= addr) &&
(addr < (APLIC_CLRIP_BASE + aplic->bitfield_words * 4))) {
word = (addr - APLIC_CLRIP_BASE) >> 2;
return riscv_aplic_read_input_word(aplic, word);
} else if (addr == APLIC_CLRIPNUM) {
return 0;
} else if ((APLIC_SETIE_BASE <= addr) &&
(addr < (APLIC_SETIE_BASE + aplic->bitfield_words * 4))) {
word = (addr - APLIC_SETIE_BASE) >> 2;
return riscv_aplic_read_enabled_word(aplic, word);
} else if (addr == APLIC_SETIENUM) {
return 0;
} else if ((APLIC_CLRIE_BASE <= addr) &&
(addr < (APLIC_CLRIE_BASE + aplic->bitfield_words * 4))) {
return 0;
} else if (addr == APLIC_CLRIENUM) {
return 0;
} else if (addr == APLIC_SETIPNUM_LE) {
return 0;
} else if (addr == APLIC_SETIPNUM_BE) {
return 0;
} else if (addr == APLIC_GENMSI) {
return (aplic->msimode) ? aplic->genmsi : 0;
} else if ((APLIC_TARGET_BASE <= addr) &&
(addr < (APLIC_TARGET_BASE + (aplic->num_irqs - 1) * 4))) {
irq = ((addr - APLIC_TARGET_BASE) >> 2) + 1;
return aplic->target[irq];
} else if (!aplic->msimode && (APLIC_IDC_BASE <= addr) &&
(addr < (APLIC_IDC_BASE + aplic->num_harts * APLIC_IDC_SIZE))) {
idc = (addr - APLIC_IDC_BASE) / APLIC_IDC_SIZE;
switch (addr - (APLIC_IDC_BASE + idc * APLIC_IDC_SIZE)) {
case APLIC_IDC_IDELIVERY:
return aplic->idelivery[idc];
case APLIC_IDC_IFORCE:
return aplic->iforce[idc];
case APLIC_IDC_ITHRESHOLD:
return aplic->ithreshold[idc];
case APLIC_IDC_TOPI:
return riscv_aplic_idc_topi(aplic, idc);
case APLIC_IDC_CLAIMI:
return riscv_aplic_idc_claimi(aplic, idc);
default:
goto err;
};
}
err:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Invalid register read 0x%" HWADDR_PRIx "\n",
__func__, addr);
return 0;
}
static void riscv_aplic_write(void *opaque, hwaddr addr, uint64_t value,
unsigned size)
{
RISCVAPLICState *aplic = opaque;
uint32_t irq, word, idc = UINT32_MAX;
/* Writes must be 4 byte words */
if ((addr & 0x3) != 0) {
goto err;
}
if (addr == APLIC_DOMAINCFG) {
/* Only IE bit writable at the moment */
value &= APLIC_DOMAINCFG_IE;
aplic->domaincfg = value;
} else if ((APLIC_SOURCECFG_BASE <= addr) &&
(addr < (APLIC_SOURCECFG_BASE + (aplic->num_irqs - 1) * 4))) {
irq = ((addr - APLIC_SOURCECFG_BASE) >> 2) + 1;
if (!aplic->num_children && (value & APLIC_SOURCECFG_D)) {
value = 0;
}
if (value & APLIC_SOURCECFG_D) {
value &= (APLIC_SOURCECFG_D | APLIC_SOURCECFG_CHILDIDX_MASK);
} else {
value &= (APLIC_SOURCECFG_D | APLIC_SOURCECFG_SM_MASK);
}
aplic->sourcecfg[irq] = value;
if ((aplic->sourcecfg[irq] & APLIC_SOURCECFG_D) ||
(aplic->sourcecfg[irq] == 0)) {
riscv_aplic_set_pending_raw(aplic, irq, false);
riscv_aplic_set_enabled_raw(aplic, irq, false);
}
} else if (aplic->mmode && aplic->msimode &&
(addr == APLIC_MMSICFGADDR)) {
if (!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) {
aplic->mmsicfgaddr = value;
}
} else if (aplic->mmode && aplic->msimode &&
(addr == APLIC_MMSICFGADDRH)) {
if (!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) {
aplic->mmsicfgaddrH = value & APLIC_xMSICFGADDRH_VALID_MASK;
}
} else if (aplic->mmode && aplic->msimode &&
(addr == APLIC_SMSICFGADDR)) {
/*
* Registers SMSICFGADDR and SMSICFGADDRH are implemented only if:
* (a) the interrupt domain is at machine level
* (b) the domain's harts implement supervisor mode
* (c) the domain has one or more child supervisor-level domains
* that support MSI delivery mode (domaincfg.DM is not read-
* only zero in at least one of the supervisor-level child
* domains).
*/
if (aplic->num_children &&
!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) {
aplic->smsicfgaddr = value;
}
} else if (aplic->mmode && aplic->msimode &&
(addr == APLIC_SMSICFGADDRH)) {
if (aplic->num_children &&
!(aplic->mmsicfgaddrH & APLIC_xMSICFGADDRH_L)) {
aplic->smsicfgaddrH = value & APLIC_xMSICFGADDRH_VALID_MASK;
}
} else if ((APLIC_SETIP_BASE <= addr) &&
(addr < (APLIC_SETIP_BASE + aplic->bitfield_words * 4))) {
word = (addr - APLIC_SETIP_BASE) >> 2;
riscv_aplic_set_pending_word(aplic, word, value, true);
} else if (addr == APLIC_SETIPNUM) {
riscv_aplic_set_pending(aplic, value, true);
} else if ((APLIC_CLRIP_BASE <= addr) &&
(addr < (APLIC_CLRIP_BASE + aplic->bitfield_words * 4))) {
word = (addr - APLIC_CLRIP_BASE) >> 2;
riscv_aplic_set_pending_word(aplic, word, value, false);
} else if (addr == APLIC_CLRIPNUM) {
riscv_aplic_set_pending(aplic, value, false);
} else if ((APLIC_SETIE_BASE <= addr) &&
(addr < (APLIC_SETIE_BASE + aplic->bitfield_words * 4))) {
word = (addr - APLIC_SETIE_BASE) >> 2;
riscv_aplic_set_enabled_word(aplic, word, value, true);
} else if (addr == APLIC_SETIENUM) {
riscv_aplic_set_enabled(aplic, value, true);
} else if ((APLIC_CLRIE_BASE <= addr) &&
(addr < (APLIC_CLRIE_BASE + aplic->bitfield_words * 4))) {
word = (addr - APLIC_CLRIE_BASE) >> 2;
riscv_aplic_set_enabled_word(aplic, word, value, false);
} else if (addr == APLIC_CLRIENUM) {
riscv_aplic_set_enabled(aplic, value, false);
} else if (addr == APLIC_SETIPNUM_LE) {
riscv_aplic_set_pending(aplic, value, true);
} else if (addr == APLIC_SETIPNUM_BE) {
riscv_aplic_set_pending(aplic, bswap32(value), true);
} else if (addr == APLIC_GENMSI) {
if (aplic->msimode) {
aplic->genmsi = value & ~(APLIC_TARGET_GUEST_IDX_MASK <<
APLIC_TARGET_GUEST_IDX_SHIFT);
riscv_aplic_msi_send(aplic,
value >> APLIC_TARGET_HART_IDX_SHIFT,
0,
value & APLIC_TARGET_EIID_MASK);
}
} else if ((APLIC_TARGET_BASE <= addr) &&
(addr < (APLIC_TARGET_BASE + (aplic->num_irqs - 1) * 4))) {
irq = ((addr - APLIC_TARGET_BASE) >> 2) + 1;
if (aplic->msimode) {
aplic->target[irq] = value;
} else {
aplic->target[irq] = (value & ~APLIC_TARGET_IPRIO_MASK) |
((value & aplic->iprio_mask) ?
(value & aplic->iprio_mask) : 1);
}
} else if (!aplic->msimode && (APLIC_IDC_BASE <= addr) &&
(addr < (APLIC_IDC_BASE + aplic->num_harts * APLIC_IDC_SIZE))) {
idc = (addr - APLIC_IDC_BASE) / APLIC_IDC_SIZE;
switch (addr - (APLIC_IDC_BASE + idc * APLIC_IDC_SIZE)) {
case APLIC_IDC_IDELIVERY:
aplic->idelivery[idc] = value & 0x1;
break;
case APLIC_IDC_IFORCE:
aplic->iforce[idc] = value & 0x1;
break;
case APLIC_IDC_ITHRESHOLD:
aplic->ithreshold[idc] = value & aplic->iprio_mask;
break;
default:
goto err;
};
} else {
goto err;
}
if (aplic->msimode) {
for (irq = 1; irq < aplic->num_irqs; irq++) {
riscv_aplic_msi_irq_update(aplic, irq);
}
} else {
if (idc == UINT32_MAX) {
for (idc = 0; idc < aplic->num_harts; idc++) {
riscv_aplic_idc_update(aplic, idc);
}
} else {
riscv_aplic_idc_update(aplic, idc);
}
}
return;
err:
qemu_log_mask(LOG_GUEST_ERROR,
"%s: Invalid register write 0x%" HWADDR_PRIx "\n",
__func__, addr);
}
static const MemoryRegionOps riscv_aplic_ops = {
.read = riscv_aplic_read,
.write = riscv_aplic_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.valid = {
.min_access_size = 4,
.max_access_size = 4
}
};
static void riscv_aplic_realize(DeviceState *dev, Error **errp)
{
uint32_t i;
RISCVAPLICState *aplic = RISCV_APLIC(dev);
if (!is_kvm_aia(aplic->msimode)) {
aplic->bitfield_words = (aplic->num_irqs + 31) >> 5;
aplic->sourcecfg = g_new0(uint32_t, aplic->num_irqs);
aplic->state = g_new0(uint32_t, aplic->num_irqs);
aplic->target = g_new0(uint32_t, aplic->num_irqs);
if (!aplic->msimode) {
for (i = 0; i < aplic->num_irqs; i++) {
aplic->target[i] = 1;
}
}
aplic->idelivery = g_new0(uint32_t, aplic->num_harts);
aplic->iforce = g_new0(uint32_t, aplic->num_harts);
aplic->ithreshold = g_new0(uint32_t, aplic->num_harts);
memory_region_init_io(&aplic->mmio, OBJECT(dev), &riscv_aplic_ops,
aplic, TYPE_RISCV_APLIC, aplic->aperture_size);
sysbus_init_mmio(SYS_BUS_DEVICE(dev), &aplic->mmio);
}
/*
* Only root APLICs have hardware IRQ lines. All non-root APLICs
* have IRQ lines delegated by their parent APLIC.
*/
if (!aplic->parent) {
if (kvm_enabled() && is_kvm_aia(aplic->msimode)) {
qdev_init_gpio_in(dev, riscv_kvm_aplic_request, aplic->num_irqs);
} else {
qdev_init_gpio_in(dev, riscv_aplic_request, aplic->num_irqs);
}
}
/* Create output IRQ lines for non-MSI mode */
if (!aplic->msimode) {
aplic->external_irqs = g_malloc(sizeof(qemu_irq) * aplic->num_harts);
qdev_init_gpio_out(dev, aplic->external_irqs, aplic->num_harts);
/* Claim the CPU interrupt to be triggered by this APLIC */
for (i = 0; i < aplic->num_harts; i++) {
RISCVCPU *cpu = RISCV_CPU(cpu_by_arch_id(aplic->hartid_base + i));
if (riscv_cpu_claim_interrupts(cpu,
(aplic->mmode) ? MIP_MEIP : MIP_SEIP) < 0) {
error_report("%s already claimed",
(aplic->mmode) ? "MEIP" : "SEIP");
exit(1);
}
}
}
msi_nonbroken = true;
}
static Property riscv_aplic_properties[] = {
DEFINE_PROP_UINT32("aperture-size", RISCVAPLICState, aperture_size, 0),
DEFINE_PROP_UINT32("hartid-base", RISCVAPLICState, hartid_base, 0),
DEFINE_PROP_UINT32("num-harts", RISCVAPLICState, num_harts, 0),
DEFINE_PROP_UINT32("iprio-mask", RISCVAPLICState, iprio_mask, 0),
DEFINE_PROP_UINT32("num-irqs", RISCVAPLICState, num_irqs, 0),
DEFINE_PROP_BOOL("msimode", RISCVAPLICState, msimode, 0),
DEFINE_PROP_BOOL("mmode", RISCVAPLICState, mmode, 0),
DEFINE_PROP_END_OF_LIST(),
};
static const VMStateDescription vmstate_riscv_aplic = {
.name = "riscv_aplic",
.version_id = 1,
.minimum_version_id = 1,
.fields = (const VMStateField[]) {
VMSTATE_UINT32(domaincfg, RISCVAPLICState),
VMSTATE_UINT32(mmsicfgaddr, RISCVAPLICState),
VMSTATE_UINT32(mmsicfgaddrH, RISCVAPLICState),
VMSTATE_UINT32(smsicfgaddr, RISCVAPLICState),
VMSTATE_UINT32(smsicfgaddrH, RISCVAPLICState),
VMSTATE_UINT32(genmsi, RISCVAPLICState),
VMSTATE_VARRAY_UINT32(sourcecfg, RISCVAPLICState,
num_irqs, 0,
vmstate_info_uint32, uint32_t),
VMSTATE_VARRAY_UINT32(state, RISCVAPLICState,
num_irqs, 0,
vmstate_info_uint32, uint32_t),
VMSTATE_VARRAY_UINT32(target, RISCVAPLICState,
num_irqs, 0,
vmstate_info_uint32, uint32_t),
VMSTATE_VARRAY_UINT32(idelivery, RISCVAPLICState,
num_harts, 0,
vmstate_info_uint32, uint32_t),
VMSTATE_VARRAY_UINT32(iforce, RISCVAPLICState,
num_harts, 0,
vmstate_info_uint32, uint32_t),
VMSTATE_VARRAY_UINT32(ithreshold, RISCVAPLICState,
num_harts, 0,
vmstate_info_uint32, uint32_t),
VMSTATE_END_OF_LIST()
}
};
static void riscv_aplic_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
device_class_set_props(dc, riscv_aplic_properties);
dc->realize = riscv_aplic_realize;
dc->vmsd = &vmstate_riscv_aplic;
}
static const TypeInfo riscv_aplic_info = {
.name = TYPE_RISCV_APLIC,
.parent = TYPE_SYS_BUS_DEVICE,
.instance_size = sizeof(RISCVAPLICState),
.class_init = riscv_aplic_class_init,
};
static void riscv_aplic_register_types(void)
{
type_register_static(&riscv_aplic_info);
}
type_init(riscv_aplic_register_types)
/*
* Add a APLIC device to another APLIC device as child for
* interrupt delegation.
*/
void riscv_aplic_add_child(DeviceState *parent, DeviceState *child)
{
RISCVAPLICState *caplic, *paplic;
assert(parent && child);
caplic = RISCV_APLIC(child);
paplic = RISCV_APLIC(parent);
assert(paplic->num_irqs == caplic->num_irqs);
assert(paplic->num_children <= QEMU_APLIC_MAX_CHILDREN);
caplic->parent = paplic;
paplic->children[paplic->num_children] = caplic;
paplic->num_children++;
}
/*
* Create APLIC device.
*/
DeviceState *riscv_aplic_create(hwaddr addr, hwaddr size,
uint32_t hartid_base, uint32_t num_harts, uint32_t num_sources,
uint32_t iprio_bits, bool msimode, bool mmode, DeviceState *parent)
{
DeviceState *dev = qdev_new(TYPE_RISCV_APLIC);
uint32_t i;
assert(num_harts < APLIC_MAX_IDC);
assert((APLIC_IDC_BASE + (num_harts * APLIC_IDC_SIZE)) <= size);
assert(num_sources < APLIC_MAX_SOURCE);
assert(APLIC_MIN_IPRIO_BITS <= iprio_bits);
assert(iprio_bits <= APLIC_MAX_IPRIO_BITS);
qdev_prop_set_uint32(dev, "aperture-size", size);
qdev_prop_set_uint32(dev, "hartid-base", hartid_base);
qdev_prop_set_uint32(dev, "num-harts", num_harts);
qdev_prop_set_uint32(dev, "iprio-mask", ((1U << iprio_bits) - 1));
qdev_prop_set_uint32(dev, "num-irqs", num_sources + 1);
qdev_prop_set_bit(dev, "msimode", msimode);
qdev_prop_set_bit(dev, "mmode", mmode);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
if (!is_kvm_aia(msimode)) {
sysbus_mmio_map(SYS_BUS_DEVICE(dev), 0, addr);
}
if (parent) {
riscv_aplic_add_child(parent, dev);
}
if (!msimode) {
for (i = 0; i < num_harts; i++) {
CPUState *cpu = cpu_by_arch_id(hartid_base + i);
qdev_connect_gpio_out_named(dev, NULL, i,
qdev_get_gpio_in(DEVICE(cpu),
(mmode) ? IRQ_M_EXT : IRQ_S_EXT));
}
}
return dev;
}
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