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qemu/hw/intc/pnv_xive.c
Cédric Le Goater 106695ab12 ppc/pnv: Improve trigger data definition 
The trigger data is used for both triggers of a HW source interrupts,
PHB, PSI, and triggers for rerouting interrupts between interrupt
controllers.

When an interrupt is rerouted, the trigger data follows an "END
trigger" format. In that case, the remote IC needs EAS containing an
END index to perform a lookup of an END.

An END trigger, bit0 of word0 set to '1', is defined as :

             |0123|4567|0123|4567|0123|4567|0123|4567|
    W0 E=1   |1P--|BLOC|          END IDX            |
    W1 E=1   |M   |           END DATA               |

An EAS is defined as :

             |0123|4567|0123|4567|0123|4567|0123|4567|
    W0       |V---|BLOC|          END IDX            |
    W1       |M   |          END DATA                |

The END trigger adds an extra 'PQ' bit, bit1 of word0 set to '1',
signaling that the PQ bits have been checked. That bit is unused in
the initial EAS definition.

When a HW device performs the trigger, the trigger data follows an
"EAS trigger" format because the trigger data in that case contains an
EAS index which the IC needs to look for.

An EAS trigger, bit0 of word0 set to '0', is defined as :

             |0123|4567|0123|4567|0123|4567|0123|4567|
    W0 E=0   |0P--|---- ---- ---- ---- ---- ---- ----|
    W1 E=0   |BLOC|            EAS INDEX             |

There is also a 'PQ' bit, bit1 of word0 to '1', signaling that the
PQ bits have been checked.

Introduce these new trigger bits and rename the XIVE_SRCNO macros in
XIVE_EAS to reflect better the nature of the data.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20191007084102.29776-2-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2019-10-24 09:36:55 +11:00

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/*
* QEMU PowerPC XIVE interrupt controller model
*
* Copyright (c) 2017-2019, IBM Corporation.
*
* This code is licensed under the GPL version 2 or later. See the
* COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "qapi/error.h"
#include "target/ppc/cpu.h"
#include "sysemu/cpus.h"
#include "sysemu/dma.h"
#include "sysemu/reset.h"
#include "monitor/monitor.h"
#include "hw/ppc/fdt.h"
#include "hw/ppc/pnv.h"
#include "hw/ppc/pnv_core.h"
#include "hw/ppc/pnv_xscom.h"
#include "hw/ppc/pnv_xive.h"
#include "hw/ppc/xive_regs.h"
#include "hw/qdev-properties.h"
#include "hw/ppc/ppc.h"
#include <libfdt.h>
#include "pnv_xive_regs.h"
#define XIVE_DEBUG
/*
* Virtual structures table (VST)
*/
#define SBE_PER_BYTE 4
typedef struct XiveVstInfo {
const char *name;
uint32_t size;
uint32_t max_blocks;
} XiveVstInfo;
static const XiveVstInfo vst_infos[] = {
[VST_TSEL_IVT] = { "EAT", sizeof(XiveEAS), 16 },
[VST_TSEL_SBE] = { "SBE", 1, 16 },
[VST_TSEL_EQDT] = { "ENDT", sizeof(XiveEND), 16 },
[VST_TSEL_VPDT] = { "VPDT", sizeof(XiveNVT), 32 },
/*
* Interrupt fifo backing store table (not modeled) :
*
* 0 - IPI,
* 1 - HWD,
* 2 - First escalate,
* 3 - Second escalate,
* 4 - Redistribution,
* 5 - IPI cascaded queue ?
*/
[VST_TSEL_IRQ] = { "IRQ", 1, 6 },
};
#define xive_error(xive, fmt, ...) \
qemu_log_mask(LOG_GUEST_ERROR, "XIVE[%x] - " fmt "\n", \
(xive)->chip->chip_id, ## __VA_ARGS__);
/*
* QEMU version of the GETFIELD/SETFIELD macros
*
* TODO: It might be better to use the existing extract64() and
* deposit64() but this means that all the register definitions will
* change and become incompatible with the ones found in skiboot.
*
* Keep it as it is for now until we find a common ground.
*/
static inline uint64_t GETFIELD(uint64_t mask, uint64_t word)
{
return (word & mask) >> ctz64(mask);
}
static inline uint64_t SETFIELD(uint64_t mask, uint64_t word,
uint64_t value)
{
return (word & ~mask) | ((value << ctz64(mask)) & mask);
}
/*
* Remote access to controllers. HW uses MMIOs. For now, a simple scan
* of the chips is good enough.
*
* TODO: Block scope support
*/
static PnvXive *pnv_xive_get_ic(uint8_t blk)
{
PnvMachineState *pnv = PNV_MACHINE(qdev_get_machine());
int i;
for (i = 0; i < pnv->num_chips; i++) {
Pnv9Chip *chip9 = PNV9_CHIP(pnv->chips[i]);
PnvXive *xive = &chip9->xive;
if (xive->chip->chip_id == blk) {
return xive;
}
}
return NULL;
}
/*
* VST accessors for SBE, EAT, ENDT, NVT
*
* Indirect VST tables are arrays of VSDs pointing to a page (of same
* size). Each page is a direct VST table.
*/
#define XIVE_VSD_SIZE 8
/* Indirect page size can be 4K, 64K, 2M, 16M. */
static uint64_t pnv_xive_vst_page_size_allowed(uint32_t page_shift)
{
return page_shift == 12 || page_shift == 16 ||
page_shift == 21 || page_shift == 24;
}
static uint64_t pnv_xive_vst_size(uint64_t vsd)
{
uint64_t vst_tsize = 1ull << (GETFIELD(VSD_TSIZE, vsd) + 12);
/*
* Read the first descriptor to get the page size of the indirect
* table.
*/
if (VSD_INDIRECT & vsd) {
uint32_t nr_pages = vst_tsize / XIVE_VSD_SIZE;
uint32_t page_shift;
vsd = ldq_be_dma(&address_space_memory, vsd & VSD_ADDRESS_MASK);
page_shift = GETFIELD(VSD_TSIZE, vsd) + 12;
if (!pnv_xive_vst_page_size_allowed(page_shift)) {
return 0;
}
return nr_pages * (1ull << page_shift);
}
return vst_tsize;
}
static uint64_t pnv_xive_vst_addr_direct(PnvXive *xive, uint32_t type,
uint64_t vsd, uint32_t idx)
{
const XiveVstInfo *info = &vst_infos[type];
uint64_t vst_addr = vsd & VSD_ADDRESS_MASK;
return vst_addr + idx * info->size;
}
static uint64_t pnv_xive_vst_addr_indirect(PnvXive *xive, uint32_t type,
uint64_t vsd, uint32_t idx)
{
const XiveVstInfo *info = &vst_infos[type];
uint64_t vsd_addr;
uint32_t vsd_idx;
uint32_t page_shift;
uint32_t vst_per_page;
/* Get the page size of the indirect table. */
vsd_addr = vsd & VSD_ADDRESS_MASK;
vsd = ldq_be_dma(&address_space_memory, vsd_addr);
if (!(vsd & VSD_ADDRESS_MASK)) {
xive_error(xive, "VST: invalid %s entry %x !?", info->name, idx);
return 0;
}
page_shift = GETFIELD(VSD_TSIZE, vsd) + 12;
if (!pnv_xive_vst_page_size_allowed(page_shift)) {
xive_error(xive, "VST: invalid %s page shift %d", info->name,
page_shift);
return 0;
}
vst_per_page = (1ull << page_shift) / info->size;
vsd_idx = idx / vst_per_page;
/* Load the VSD we are looking for, if not already done */
if (vsd_idx) {
vsd_addr = vsd_addr + vsd_idx * XIVE_VSD_SIZE;
vsd = ldq_be_dma(&address_space_memory, vsd_addr);
if (!(vsd & VSD_ADDRESS_MASK)) {
xive_error(xive, "VST: invalid %s entry %x !?", info->name, idx);
return 0;
}
/*
* Check that the pages have a consistent size across the
* indirect table
*/
if (page_shift != GETFIELD(VSD_TSIZE, vsd) + 12) {
xive_error(xive, "VST: %s entry %x indirect page size differ !?",
info->name, idx);
return 0;
}
}
return pnv_xive_vst_addr_direct(xive, type, vsd, (idx % vst_per_page));
}
static uint64_t pnv_xive_vst_addr(PnvXive *xive, uint32_t type, uint8_t blk,
uint32_t idx)
{
const XiveVstInfo *info = &vst_infos[type];
uint64_t vsd;
uint32_t idx_max;
if (blk >= info->max_blocks) {
xive_error(xive, "VST: invalid block id %d for VST %s %d !?",
blk, info->name, idx);
return 0;
}
vsd = xive->vsds[type][blk];
/* Remote VST access */
if (GETFIELD(VSD_MODE, vsd) == VSD_MODE_FORWARD) {
xive = pnv_xive_get_ic(blk);
return xive ? pnv_xive_vst_addr(xive, type, blk, idx) : 0;
}
idx_max = pnv_xive_vst_size(vsd) / info->size - 1;
if (idx > idx_max) {
#ifdef XIVE_DEBUG
xive_error(xive, "VST: %s entry %x/%x out of range [ 0 .. %x ] !?",
info->name, blk, idx, idx_max);
#endif
return 0;
}
if (VSD_INDIRECT & vsd) {
return pnv_xive_vst_addr_indirect(xive, type, vsd, idx);
}
return pnv_xive_vst_addr_direct(xive, type, vsd, idx);
}
static int pnv_xive_vst_read(PnvXive *xive, uint32_t type, uint8_t blk,
uint32_t idx, void *data)
{
const XiveVstInfo *info = &vst_infos[type];
uint64_t addr = pnv_xive_vst_addr(xive, type, blk, idx);
if (!addr) {
return -1;
}
cpu_physical_memory_read(addr, data, info->size);
return 0;
}
#define XIVE_VST_WORD_ALL -1
static int pnv_xive_vst_write(PnvXive *xive, uint32_t type, uint8_t blk,
uint32_t idx, void *data, uint32_t word_number)
{
const XiveVstInfo *info = &vst_infos[type];
uint64_t addr = pnv_xive_vst_addr(xive, type, blk, idx);
if (!addr) {
return -1;
}
if (word_number == XIVE_VST_WORD_ALL) {
cpu_physical_memory_write(addr, data, info->size);
} else {
cpu_physical_memory_write(addr + word_number * 4,
data + word_number * 4, 4);
}
return 0;
}
static int pnv_xive_get_end(XiveRouter *xrtr, uint8_t blk, uint32_t idx,
XiveEND *end)
{
return pnv_xive_vst_read(PNV_XIVE(xrtr), VST_TSEL_EQDT, blk, idx, end);
}
static int pnv_xive_write_end(XiveRouter *xrtr, uint8_t blk, uint32_t idx,
XiveEND *end, uint8_t word_number)
{
return pnv_xive_vst_write(PNV_XIVE(xrtr), VST_TSEL_EQDT, blk, idx, end,
word_number);
}
static int pnv_xive_end_update(PnvXive *xive)
{
uint8_t blk = GETFIELD(VC_EQC_CWATCH_BLOCKID,
xive->regs[(VC_EQC_CWATCH_SPEC >> 3)]);
uint32_t idx = GETFIELD(VC_EQC_CWATCH_OFFSET,
xive->regs[(VC_EQC_CWATCH_SPEC >> 3)]);
int i;
uint64_t eqc_watch[4];
for (i = 0; i < ARRAY_SIZE(eqc_watch); i++) {
eqc_watch[i] = cpu_to_be64(xive->regs[(VC_EQC_CWATCH_DAT0 >> 3) + i]);
}
return pnv_xive_vst_write(xive, VST_TSEL_EQDT, blk, idx, eqc_watch,
XIVE_VST_WORD_ALL);
}
static void pnv_xive_end_cache_load(PnvXive *xive)
{
uint8_t blk = GETFIELD(VC_EQC_CWATCH_BLOCKID,
xive->regs[(VC_EQC_CWATCH_SPEC >> 3)]);
uint32_t idx = GETFIELD(VC_EQC_CWATCH_OFFSET,
xive->regs[(VC_EQC_CWATCH_SPEC >> 3)]);
uint64_t eqc_watch[4] = { 0 };
int i;
if (pnv_xive_vst_read(xive, VST_TSEL_EQDT, blk, idx, eqc_watch)) {
xive_error(xive, "VST: no END entry %x/%x !?", blk, idx);
}
for (i = 0; i < ARRAY_SIZE(eqc_watch); i++) {
xive->regs[(VC_EQC_CWATCH_DAT0 >> 3) + i] = be64_to_cpu(eqc_watch[i]);
}
}
static int pnv_xive_get_nvt(XiveRouter *xrtr, uint8_t blk, uint32_t idx,
XiveNVT *nvt)
{
return pnv_xive_vst_read(PNV_XIVE(xrtr), VST_TSEL_VPDT, blk, idx, nvt);
}
static int pnv_xive_write_nvt(XiveRouter *xrtr, uint8_t blk, uint32_t idx,
XiveNVT *nvt, uint8_t word_number)
{
return pnv_xive_vst_write(PNV_XIVE(xrtr), VST_TSEL_VPDT, blk, idx, nvt,
word_number);
}
static int pnv_xive_nvt_update(PnvXive *xive)
{
uint8_t blk = GETFIELD(PC_VPC_CWATCH_BLOCKID,
xive->regs[(PC_VPC_CWATCH_SPEC >> 3)]);
uint32_t idx = GETFIELD(PC_VPC_CWATCH_OFFSET,
xive->regs[(PC_VPC_CWATCH_SPEC >> 3)]);
int i;
uint64_t vpc_watch[8];
for (i = 0; i < ARRAY_SIZE(vpc_watch); i++) {
vpc_watch[i] = cpu_to_be64(xive->regs[(PC_VPC_CWATCH_DAT0 >> 3) + i]);
}
return pnv_xive_vst_write(xive, VST_TSEL_VPDT, blk, idx, vpc_watch,
XIVE_VST_WORD_ALL);
}
static void pnv_xive_nvt_cache_load(PnvXive *xive)
{
uint8_t blk = GETFIELD(PC_VPC_CWATCH_BLOCKID,
xive->regs[(PC_VPC_CWATCH_SPEC >> 3)]);
uint32_t idx = GETFIELD(PC_VPC_CWATCH_OFFSET,
xive->regs[(PC_VPC_CWATCH_SPEC >> 3)]);
uint64_t vpc_watch[8] = { 0 };
int i;
if (pnv_xive_vst_read(xive, VST_TSEL_VPDT, blk, idx, vpc_watch)) {
xive_error(xive, "VST: no NVT entry %x/%x !?", blk, idx);
}
for (i = 0; i < ARRAY_SIZE(vpc_watch); i++) {
xive->regs[(PC_VPC_CWATCH_DAT0 >> 3) + i] = be64_to_cpu(vpc_watch[i]);
}
}
static int pnv_xive_get_eas(XiveRouter *xrtr, uint8_t blk, uint32_t idx,
XiveEAS *eas)
{
PnvXive *xive = PNV_XIVE(xrtr);
if (pnv_xive_get_ic(blk) != xive) {
xive_error(xive, "VST: EAS %x is remote !?", XIVE_EAS(blk, idx));
return -1;
}
return pnv_xive_vst_read(xive, VST_TSEL_IVT, blk, idx, eas);
}
static XiveTCTX *pnv_xive_get_tctx(XiveRouter *xrtr, CPUState *cs)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
XiveTCTX *tctx = XIVE_TCTX(pnv_cpu_state(cpu)->intc);
PnvXive *xive = NULL;
CPUPPCState *env = &cpu->env;
int pir = env->spr_cb[SPR_PIR].default_value;
/*
* Perform an extra check on the HW thread enablement.
*
* The TIMA is shared among the chips and to identify the chip
* from which the access is being done, we extract the chip id
* from the PIR.
*/
xive = pnv_xive_get_ic((pir >> 8) & 0xf);
if (!xive) {
return NULL;
}
if (!(xive->regs[PC_THREAD_EN_REG0 >> 3] & PPC_BIT(pir & 0x3f))) {
xive_error(PNV_XIVE(xrtr), "IC: CPU %x is not enabled", pir);
}
return tctx;
}
/*
* The internal sources (IPIs) of the interrupt controller have no
* knowledge of the XIVE chip on which they reside. Encode the block
* id in the source interrupt number before forwarding the source
* event notification to the Router. This is required on a multichip
* system.
*/
static void pnv_xive_notify(XiveNotifier *xn, uint32_t srcno)
{
PnvXive *xive = PNV_XIVE(xn);
uint8_t blk = xive->chip->chip_id;
xive_router_notify(xn, XIVE_EAS(blk, srcno));
}
/*
* XIVE helpers
*/
static uint64_t pnv_xive_vc_size(PnvXive *xive)
{
return (~xive->regs[CQ_VC_BARM >> 3] + 1) & CQ_VC_BARM_MASK;
}
static uint64_t pnv_xive_edt_shift(PnvXive *xive)
{
return ctz64(pnv_xive_vc_size(xive) / XIVE_TABLE_EDT_MAX);
}
static uint64_t pnv_xive_pc_size(PnvXive *xive)
{
return (~xive->regs[CQ_PC_BARM >> 3] + 1) & CQ_PC_BARM_MASK;
}
static uint32_t pnv_xive_nr_ipis(PnvXive *xive)
{
uint8_t blk = xive->chip->chip_id;
return pnv_xive_vst_size(xive->vsds[VST_TSEL_SBE][blk]) * SBE_PER_BYTE;
}
static uint32_t pnv_xive_nr_ends(PnvXive *xive)
{
uint8_t blk = xive->chip->chip_id;
return pnv_xive_vst_size(xive->vsds[VST_TSEL_EQDT][blk])
/ vst_infos[VST_TSEL_EQDT].size;
}
/*
* EDT Table
*
* The Virtualization Controller MMIO region containing the IPI ESB
* pages and END ESB pages is sub-divided into "sets" which map
* portions of the VC region to the different ESB pages. It is
* configured at runtime through the EDT "Domain Table" to let the
* firmware decide how to split the VC address space between IPI ESB
* pages and END ESB pages.
*/
/*
* Computes the overall size of the IPI or the END ESB pages
*/
static uint64_t pnv_xive_edt_size(PnvXive *xive, uint64_t type)
{
uint64_t edt_size = 1ull << pnv_xive_edt_shift(xive);
uint64_t size = 0;
int i;
for (i = 0; i < XIVE_TABLE_EDT_MAX; i++) {
uint64_t edt_type = GETFIELD(CQ_TDR_EDT_TYPE, xive->edt[i]);
if (edt_type == type) {
size += edt_size;
}
}
return size;
}
/*
* Maps an offset of the VC region in the IPI or END region using the
* layout defined by the EDT "Domaine Table"
*/
static uint64_t pnv_xive_edt_offset(PnvXive *xive, uint64_t vc_offset,
uint64_t type)
{
int i;
uint64_t edt_size = 1ull << pnv_xive_edt_shift(xive);
uint64_t edt_offset = vc_offset;
for (i = 0; i < XIVE_TABLE_EDT_MAX && (i * edt_size) < vc_offset; i++) {
uint64_t edt_type = GETFIELD(CQ_TDR_EDT_TYPE, xive->edt[i]);
if (edt_type != type) {
edt_offset -= edt_size;
}
}
return edt_offset;
}
static void pnv_xive_edt_resize(PnvXive *xive)
{
uint64_t ipi_edt_size = pnv_xive_edt_size(xive, CQ_TDR_EDT_IPI);
uint64_t end_edt_size = pnv_xive_edt_size(xive, CQ_TDR_EDT_EQ);
memory_region_set_size(&xive->ipi_edt_mmio, ipi_edt_size);
memory_region_add_subregion(&xive->ipi_mmio, 0, &xive->ipi_edt_mmio);
memory_region_set_size(&xive->end_edt_mmio, end_edt_size);
memory_region_add_subregion(&xive->end_mmio, 0, &xive->end_edt_mmio);
}
/*
* XIVE Table configuration. Only EDT is supported.
*/
static int pnv_xive_table_set_data(PnvXive *xive, uint64_t val)
{
uint64_t tsel = xive->regs[CQ_TAR >> 3] & CQ_TAR_TSEL;
uint8_t tsel_index = GETFIELD(CQ_TAR_TSEL_INDEX, xive->regs[CQ_TAR >> 3]);
uint64_t *xive_table;
uint8_t max_index;
switch (tsel) {
case CQ_TAR_TSEL_BLK:
max_index = ARRAY_SIZE(xive->blk);
xive_table = xive->blk;
break;
case CQ_TAR_TSEL_MIG:
max_index = ARRAY_SIZE(xive->mig);
xive_table = xive->mig;
break;
case CQ_TAR_TSEL_EDT:
max_index = ARRAY_SIZE(xive->edt);
xive_table = xive->edt;
break;
case CQ_TAR_TSEL_VDT:
max_index = ARRAY_SIZE(xive->vdt);
xive_table = xive->vdt;
break;
default:
xive_error(xive, "IC: invalid table %d", (int) tsel);
return -1;
}
if (tsel_index >= max_index) {
xive_error(xive, "IC: invalid index %d", (int) tsel_index);
return -1;
}
xive_table[tsel_index] = val;
if (xive->regs[CQ_TAR >> 3] & CQ_TAR_TBL_AUTOINC) {
xive->regs[CQ_TAR >> 3] =
SETFIELD(CQ_TAR_TSEL_INDEX, xive->regs[CQ_TAR >> 3], ++tsel_index);
}
/*
* EDT configuration is complete. Resize the MMIO windows exposing
* the IPI and the END ESBs in the VC region.
*/
if (tsel == CQ_TAR_TSEL_EDT && tsel_index == ARRAY_SIZE(xive->edt)) {
pnv_xive_edt_resize(xive);
}
return 0;
}
/*
* Virtual Structure Tables (VST) configuration
*/
static void pnv_xive_vst_set_exclusive(PnvXive *xive, uint8_t type,
uint8_t blk, uint64_t vsd)
{
XiveENDSource *end_xsrc = &xive->end_source;
XiveSource *xsrc = &xive->ipi_source;
const XiveVstInfo *info = &vst_infos[type];
uint32_t page_shift = GETFIELD(VSD_TSIZE, vsd) + 12;
uint64_t vst_addr = vsd & VSD_ADDRESS_MASK;
/* Basic checks */
if (VSD_INDIRECT & vsd) {
if (!(xive->regs[VC_GLOBAL_CONFIG >> 3] & VC_GCONF_INDIRECT)) {
xive_error(xive, "VST: %s indirect tables are not enabled",
info->name);
return;
}
if (!pnv_xive_vst_page_size_allowed(page_shift)) {
xive_error(xive, "VST: invalid %s page shift %d", info->name,
page_shift);
return;
}
}
if (!QEMU_IS_ALIGNED(vst_addr, 1ull << page_shift)) {
xive_error(xive, "VST: %s table address 0x%"PRIx64" is not aligned with"
" page shift %d", info->name, vst_addr, page_shift);
return;
}
/* Record the table configuration (in SRAM on HW) */
xive->vsds[type][blk] = vsd;
/* Now tune the models with the configuration provided by the FW */
switch (type) {
case VST_TSEL_IVT: /* Nothing to be done */
break;
case VST_TSEL_EQDT:
/*
* Backing store pages for the END. Compute the number of ENDs
* provisioned by FW and resize the END ESB window accordingly.
*/
memory_region_set_size(&end_xsrc->esb_mmio, pnv_xive_nr_ends(xive) *
(1ull << (end_xsrc->esb_shift + 1)));
memory_region_add_subregion(&xive->end_edt_mmio, 0,
&end_xsrc->esb_mmio);
break;
case VST_TSEL_SBE:
/*
* Backing store pages for the source PQ bits. The model does
* not use these PQ bits backed in RAM because the XiveSource
* model has its own. Compute the number of IRQs provisioned
* by FW and resize the IPI ESB window accordingly.
*/
memory_region_set_size(&xsrc->esb_mmio, pnv_xive_nr_ipis(xive) *
(1ull << xsrc->esb_shift));
memory_region_add_subregion(&xive->ipi_edt_mmio, 0, &xsrc->esb_mmio);
break;
case VST_TSEL_VPDT: /* Not modeled */
case VST_TSEL_IRQ: /* Not modeled */
/*
* These tables contains the backing store pages for the
* interrupt fifos of the VC sub-engine in case of overflow.
*/
break;
default:
g_assert_not_reached();
}
}
/*
* Both PC and VC sub-engines are configured as each use the Virtual
* Structure Tables : SBE, EAS, END and NVT.
*/
static void pnv_xive_vst_set_data(PnvXive *xive, uint64_t vsd, bool pc_engine)
{
uint8_t mode = GETFIELD(VSD_MODE, vsd);
uint8_t type = GETFIELD(VST_TABLE_SELECT,
xive->regs[VC_VSD_TABLE_ADDR >> 3]);
uint8_t blk = GETFIELD(VST_TABLE_BLOCK,
xive->regs[VC_VSD_TABLE_ADDR >> 3]);
uint64_t vst_addr = vsd & VSD_ADDRESS_MASK;
if (type > VST_TSEL_IRQ) {
xive_error(xive, "VST: invalid table type %d", type);
return;
}
if (blk >= vst_infos[type].max_blocks) {
xive_error(xive, "VST: invalid block id %d for"
" %s table", blk, vst_infos[type].name);
return;
}
/*
* Only take the VC sub-engine configuration into account because
* the XiveRouter model combines both VC and PC sub-engines
*/
if (pc_engine) {
return;
}
if (!vst_addr) {
xive_error(xive, "VST: invalid %s table address", vst_infos[type].name);
return;
}
switch (mode) {
case VSD_MODE_FORWARD:
xive->vsds[type][blk] = vsd;
break;
case VSD_MODE_EXCLUSIVE:
pnv_xive_vst_set_exclusive(xive, type, blk, vsd);
break;
default:
xive_error(xive, "VST: unsupported table mode %d", mode);
return;
}
}
/*
* Interrupt controller MMIO region. The layout is compatible between
* 4K and 64K pages :
*
* Page 0 sub-engine BARs
* 0x000 - 0x3FF IC registers
* 0x400 - 0x7FF PC registers
* 0x800 - 0xFFF VC registers
*
* Page 1 Notify page (writes only)
* 0x000 - 0x7FF HW interrupt triggers (PSI, PHB)
* 0x800 - 0xFFF forwards and syncs
*
* Page 2 LSI Trigger page (writes only) (not modeled)
* Page 3 LSI SB EOI page (reads only) (not modeled)
*
* Page 4-7 indirect TIMA
*/
/*
* IC - registers MMIO
*/
static void pnv_xive_ic_reg_write(void *opaque, hwaddr offset,
uint64_t val, unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
MemoryRegion *sysmem = get_system_memory();
uint32_t reg = offset >> 3;
bool is_chip0 = xive->chip->chip_id == 0;
switch (offset) {
/*
* XIVE CQ (PowerBus bridge) settings
*/
case CQ_MSGSND: /* msgsnd for doorbells */
case CQ_FIRMASK_OR: /* FIR error reporting */
break;
case CQ_PBI_CTL:
if (val & CQ_PBI_PC_64K) {
xive->pc_shift = 16;
}
if (val & CQ_PBI_VC_64K) {
xive->vc_shift = 16;
}
break;
case CQ_CFG_PB_GEN: /* PowerBus General Configuration */
/*
* TODO: CQ_INT_ADDR_OPT for 1-block-per-chip mode
*/
break;
/*
* XIVE Virtualization Controller settings
*/
case VC_GLOBAL_CONFIG:
break;
/*
* XIVE Presenter Controller settings
*/
case PC_GLOBAL_CONFIG:
/*
* PC_GCONF_CHIPID_OVR
* Overrides Int command Chip ID with the Chip ID field (DEBUG)
*/
break;
case PC_TCTXT_CFG:
/*
* TODO: block group support
*
* PC_TCTXT_CFG_BLKGRP_EN
* PC_TCTXT_CFG_HARD_CHIPID_BLK :
* Moves the chipid into block field for hardwired CAM compares.
* Block offset value is adjusted to 0b0..01 & ThrdId
*
* Will require changes in xive_presenter_tctx_match(). I am
* not sure how to handle that yet.
*/
/* Overrides hardwired chip ID with the chip ID field */
if (val & PC_TCTXT_CHIPID_OVERRIDE) {
xive->tctx_chipid = GETFIELD(PC_TCTXT_CHIPID, val);
}
break;
case PC_TCTXT_TRACK:
/*
* PC_TCTXT_TRACK_EN:
* enable block tracking and exchange of block ownership
* information between Interrupt controllers
*/
break;
/*
* Misc settings
*/
case VC_SBC_CONFIG: /* Store EOI configuration */
/*
* Configure store EOI if required by firwmare (skiboot has removed
* support recently though)
*/
if (val & (VC_SBC_CONF_CPLX_CIST | VC_SBC_CONF_CIST_BOTH)) {
xive->ipi_source.esb_flags |= XIVE_SRC_STORE_EOI;
}
break;
case VC_EQC_CONFIG: /* TODO: silent escalation */
case VC_AIB_TX_ORDER_TAG2: /* relax ordering */
break;
/*
* XIVE BAR settings (XSCOM only)
*/
case CQ_RST_CTL:
/* bit4: resets all BAR registers */
break;
case CQ_IC_BAR: /* IC BAR. 8 pages */
xive->ic_shift = val & CQ_IC_BAR_64K ? 16 : 12;
if (!(val & CQ_IC_BAR_VALID)) {
xive->ic_base = 0;
if (xive->regs[reg] & CQ_IC_BAR_VALID) {
memory_region_del_subregion(&xive->ic_mmio,
&xive->ic_reg_mmio);
memory_region_del_subregion(&xive->ic_mmio,
&xive->ic_notify_mmio);
memory_region_del_subregion(&xive->ic_mmio,
&xive->ic_lsi_mmio);
memory_region_del_subregion(&xive->ic_mmio,
&xive->tm_indirect_mmio);
memory_region_del_subregion(sysmem, &xive->ic_mmio);
}
} else {
xive->ic_base = val & ~(CQ_IC_BAR_VALID | CQ_IC_BAR_64K);
if (!(xive->regs[reg] & CQ_IC_BAR_VALID)) {
memory_region_add_subregion(sysmem, xive->ic_base,
&xive->ic_mmio);
memory_region_add_subregion(&xive->ic_mmio, 0,
&xive->ic_reg_mmio);
memory_region_add_subregion(&xive->ic_mmio,
1ul << xive->ic_shift,
&xive->ic_notify_mmio);
memory_region_add_subregion(&xive->ic_mmio,
2ul << xive->ic_shift,
&xive->ic_lsi_mmio);
memory_region_add_subregion(&xive->ic_mmio,
4ull << xive->ic_shift,
&xive->tm_indirect_mmio);
}
}
break;
case CQ_TM1_BAR: /* TM BAR. 4 pages. Map only once */
case CQ_TM2_BAR: /* second TM BAR. for hotplug. Not modeled */
xive->tm_shift = val & CQ_TM_BAR_64K ? 16 : 12;
if (!(val & CQ_TM_BAR_VALID)) {
xive->tm_base = 0;
if (xive->regs[reg] & CQ_TM_BAR_VALID && is_chip0) {
memory_region_del_subregion(sysmem, &xive->tm_mmio);
}
} else {
xive->tm_base = val & ~(CQ_TM_BAR_VALID | CQ_TM_BAR_64K);
if (!(xive->regs[reg] & CQ_TM_BAR_VALID) && is_chip0) {
memory_region_add_subregion(sysmem, xive->tm_base,
&xive->tm_mmio);
}
}
break;
case CQ_PC_BARM:
xive->regs[reg] = val;
memory_region_set_size(&xive->pc_mmio, pnv_xive_pc_size(xive));
break;
case CQ_PC_BAR: /* From 32M to 512G */
if (!(val & CQ_PC_BAR_VALID)) {
xive->pc_base = 0;
if (xive->regs[reg] & CQ_PC_BAR_VALID) {
memory_region_del_subregion(sysmem, &xive->pc_mmio);
}
} else {
xive->pc_base = val & ~(CQ_PC_BAR_VALID);
if (!(xive->regs[reg] & CQ_PC_BAR_VALID)) {
memory_region_add_subregion(sysmem, xive->pc_base,
&xive->pc_mmio);
}
}
break;
case CQ_VC_BARM:
xive->regs[reg] = val;
memory_region_set_size(&xive->vc_mmio, pnv_xive_vc_size(xive));
break;
case CQ_VC_BAR: /* From 64M to 4TB */
if (!(val & CQ_VC_BAR_VALID)) {
xive->vc_base = 0;
if (xive->regs[reg] & CQ_VC_BAR_VALID) {
memory_region_del_subregion(sysmem, &xive->vc_mmio);
}
} else {
xive->vc_base = val & ~(CQ_VC_BAR_VALID);
if (!(xive->regs[reg] & CQ_VC_BAR_VALID)) {
memory_region_add_subregion(sysmem, xive->vc_base,
&xive->vc_mmio);
}
}
break;
/*
* XIVE Table settings.
*/
case CQ_TAR: /* Table Address */
break;
case CQ_TDR: /* Table Data */
pnv_xive_table_set_data(xive, val);
break;
/*
* XIVE VC & PC Virtual Structure Table settings
*/
case VC_VSD_TABLE_ADDR:
case PC_VSD_TABLE_ADDR: /* Virtual table selector */
break;
case VC_VSD_TABLE_DATA: /* Virtual table setting */
case PC_VSD_TABLE_DATA:
pnv_xive_vst_set_data(xive, val, offset == PC_VSD_TABLE_DATA);
break;
/*
* Interrupt fifo overflow in memory backing store (Not modeled)
*/
case VC_IRQ_CONFIG_IPI:
case VC_IRQ_CONFIG_HW:
case VC_IRQ_CONFIG_CASCADE1:
case VC_IRQ_CONFIG_CASCADE2:
case VC_IRQ_CONFIG_REDIST:
case VC_IRQ_CONFIG_IPI_CASC:
break;
/*
* XIVE hardware thread enablement
*/
case PC_THREAD_EN_REG0: /* Physical Thread Enable */
case PC_THREAD_EN_REG1: /* Physical Thread Enable (fused core) */
break;
case PC_THREAD_EN_REG0_SET:
xive->regs[PC_THREAD_EN_REG0 >> 3] |= val;
break;
case PC_THREAD_EN_REG1_SET:
xive->regs[PC_THREAD_EN_REG1 >> 3] |= val;
break;
case PC_THREAD_EN_REG0_CLR:
xive->regs[PC_THREAD_EN_REG0 >> 3] &= ~val;
break;
case PC_THREAD_EN_REG1_CLR:
xive->regs[PC_THREAD_EN_REG1 >> 3] &= ~val;
break;
/*
* Indirect TIMA access set up. Defines the PIR of the HW thread
* to use.
*/
case PC_TCTXT_INDIR0 ... PC_TCTXT_INDIR3:
break;
/*
* XIVE PC & VC cache updates for EAS, NVT and END
*/
case VC_IVC_SCRUB_MASK:
case VC_IVC_SCRUB_TRIG:
break;
case VC_EQC_CWATCH_SPEC:
val &= ~VC_EQC_CWATCH_CONFLICT; /* HW resets this bit */
break;
case VC_EQC_CWATCH_DAT1 ... VC_EQC_CWATCH_DAT3:
break;
case VC_EQC_CWATCH_DAT0:
/* writing to DATA0 triggers the cache write */
xive->regs[reg] = val;
pnv_xive_end_update(xive);
break;
case VC_EQC_SCRUB_MASK:
case VC_EQC_SCRUB_TRIG:
/*
* The scrubbing registers flush the cache in RAM and can also
* invalidate.
*/
break;
case PC_VPC_CWATCH_SPEC:
val &= ~PC_VPC_CWATCH_CONFLICT; /* HW resets this bit */
break;
case PC_VPC_CWATCH_DAT1 ... PC_VPC_CWATCH_DAT7:
break;
case PC_VPC_CWATCH_DAT0:
/* writing to DATA0 triggers the cache write */
xive->regs[reg] = val;
pnv_xive_nvt_update(xive);
break;
case PC_VPC_SCRUB_MASK:
case PC_VPC_SCRUB_TRIG:
/*
* The scrubbing registers flush the cache in RAM and can also
* invalidate.
*/
break;
/*
* XIVE PC & VC cache invalidation
*/
case PC_AT_KILL:
break;
case VC_AT_MACRO_KILL:
break;
case PC_AT_KILL_MASK:
case VC_AT_MACRO_KILL_MASK:
break;
default:
xive_error(xive, "IC: invalid write to reg=0x%"HWADDR_PRIx, offset);
return;
}
xive->regs[reg] = val;
}
static uint64_t pnv_xive_ic_reg_read(void *opaque, hwaddr offset, unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
uint64_t val = 0;
uint32_t reg = offset >> 3;
switch (offset) {
case CQ_CFG_PB_GEN:
case CQ_IC_BAR:
case CQ_TM1_BAR:
case CQ_TM2_BAR:
case CQ_PC_BAR:
case CQ_PC_BARM:
case CQ_VC_BAR:
case CQ_VC_BARM:
case CQ_TAR:
case CQ_TDR:
case CQ_PBI_CTL:
case PC_TCTXT_CFG:
case PC_TCTXT_TRACK:
case PC_TCTXT_INDIR0:
case PC_TCTXT_INDIR1:
case PC_TCTXT_INDIR2:
case PC_TCTXT_INDIR3:
case PC_GLOBAL_CONFIG:
case PC_VPC_SCRUB_MASK:
case VC_GLOBAL_CONFIG:
case VC_AIB_TX_ORDER_TAG2:
case VC_IRQ_CONFIG_IPI:
case VC_IRQ_CONFIG_HW:
case VC_IRQ_CONFIG_CASCADE1:
case VC_IRQ_CONFIG_CASCADE2:
case VC_IRQ_CONFIG_REDIST:
case VC_IRQ_CONFIG_IPI_CASC:
case VC_EQC_SCRUB_MASK:
case VC_IVC_SCRUB_MASK:
case VC_SBC_CONFIG:
case VC_AT_MACRO_KILL_MASK:
case VC_VSD_TABLE_ADDR:
case PC_VSD_TABLE_ADDR:
case VC_VSD_TABLE_DATA:
case PC_VSD_TABLE_DATA:
case PC_THREAD_EN_REG0:
case PC_THREAD_EN_REG1:
val = xive->regs[reg];
break;
/*
* XIVE hardware thread enablement
*/
case PC_THREAD_EN_REG0_SET:
case PC_THREAD_EN_REG0_CLR:
val = xive->regs[PC_THREAD_EN_REG0 >> 3];
break;
case PC_THREAD_EN_REG1_SET:
case PC_THREAD_EN_REG1_CLR:
val = xive->regs[PC_THREAD_EN_REG1 >> 3];
break;
case CQ_MSGSND: /* Identifies which cores have msgsnd enabled. */
val = 0xffffff0000000000;
break;
/*
* XIVE PC & VC cache updates for EAS, NVT and END
*/
case VC_EQC_CWATCH_SPEC:
xive->regs[reg] = ~(VC_EQC_CWATCH_FULL | VC_EQC_CWATCH_CONFLICT);
val = xive->regs[reg];
break;
case VC_EQC_CWATCH_DAT0:
/*
* Load DATA registers from cache with data requested by the
* SPEC register
*/
pnv_xive_end_cache_load(xive);
val = xive->regs[reg];
break;
case VC_EQC_CWATCH_DAT1 ... VC_EQC_CWATCH_DAT3:
val = xive->regs[reg];
break;
case PC_VPC_CWATCH_SPEC:
xive->regs[reg] = ~(PC_VPC_CWATCH_FULL | PC_VPC_CWATCH_CONFLICT);
val = xive->regs[reg];
break;
case PC_VPC_CWATCH_DAT0:
/*
* Load DATA registers from cache with data requested by the
* SPEC register
*/
pnv_xive_nvt_cache_load(xive);
val = xive->regs[reg];
break;
case PC_VPC_CWATCH_DAT1 ... PC_VPC_CWATCH_DAT7:
val = xive->regs[reg];
break;
case PC_VPC_SCRUB_TRIG:
case VC_IVC_SCRUB_TRIG:
case VC_EQC_SCRUB_TRIG:
xive->regs[reg] &= ~VC_SCRUB_VALID;
val = xive->regs[reg];
break;
/*
* XIVE PC & VC cache invalidation
*/
case PC_AT_KILL:
xive->regs[reg] &= ~PC_AT_KILL_VALID;
val = xive->regs[reg];
break;
case VC_AT_MACRO_KILL:
xive->regs[reg] &= ~VC_KILL_VALID;
val = xive->regs[reg];
break;
/*
* XIVE synchronisation
*/
case VC_EQC_CONFIG:
val = VC_EQC_SYNC_MASK;
break;
default:
xive_error(xive, "IC: invalid read reg=0x%"HWADDR_PRIx, offset);
}
return val;
}
static const MemoryRegionOps pnv_xive_ic_reg_ops = {
.read = pnv_xive_ic_reg_read,
.write = pnv_xive_ic_reg_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 8,
.max_access_size = 8,
},
.impl = {
.min_access_size = 8,
.max_access_size = 8,
},
};
/*
* IC - Notify MMIO port page (write only)
*/
#define PNV_XIVE_FORWARD_IPI 0x800 /* Forward IPI */
#define PNV_XIVE_FORWARD_HW 0x880 /* Forward HW */
#define PNV_XIVE_FORWARD_OS_ESC 0x900 /* Forward OS escalation */
#define PNV_XIVE_FORWARD_HW_ESC 0x980 /* Forward Hyp escalation */
#define PNV_XIVE_FORWARD_REDIS 0xa00 /* Forward Redistribution */
#define PNV_XIVE_RESERVED5 0xa80 /* Cache line 5 PowerBUS operation */
#define PNV_XIVE_RESERVED6 0xb00 /* Cache line 6 PowerBUS operation */
#define PNV_XIVE_RESERVED7 0xb80 /* Cache line 7 PowerBUS operation */
/* VC synchronisation */
#define PNV_XIVE_SYNC_IPI 0xc00 /* Sync IPI */
#define PNV_XIVE_SYNC_HW 0xc80 /* Sync HW */
#define PNV_XIVE_SYNC_OS_ESC 0xd00 /* Sync OS escalation */
#define PNV_XIVE_SYNC_HW_ESC 0xd80 /* Sync Hyp escalation */
#define PNV_XIVE_SYNC_REDIS 0xe00 /* Sync Redistribution */
/* PC synchronisation */
#define PNV_XIVE_SYNC_PULL 0xe80 /* Sync pull context */
#define PNV_XIVE_SYNC_PUSH 0xf00 /* Sync push context */
#define PNV_XIVE_SYNC_VPC 0xf80 /* Sync remove VPC store */
static void pnv_xive_ic_hw_trigger(PnvXive *xive, hwaddr addr, uint64_t val)
{
uint8_t blk;
uint32_t idx;
if (val & XIVE_TRIGGER_END) {
xive_error(xive, "IC: END trigger at @0x%"HWADDR_PRIx" data 0x%"PRIx64,
addr, val);
return;
}
/*
* Forward the source event notification directly to the Router.
* The source interrupt number should already be correctly encoded
* with the chip block id by the sending device (PHB, PSI).
*/
blk = XIVE_EAS_BLOCK(val);
idx = XIVE_EAS_INDEX(val);
xive_router_notify(XIVE_NOTIFIER(xive), XIVE_EAS(blk, idx));
}
static void pnv_xive_ic_notify_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
/* VC: HW triggers */
switch (addr) {
case 0x000 ... 0x7FF:
pnv_xive_ic_hw_trigger(opaque, addr, val);
break;
/* VC: Forwarded IRQs */
case PNV_XIVE_FORWARD_IPI:
case PNV_XIVE_FORWARD_HW:
case PNV_XIVE_FORWARD_OS_ESC:
case PNV_XIVE_FORWARD_HW_ESC:
case PNV_XIVE_FORWARD_REDIS:
/* TODO: forwarded IRQs. Should be like HW triggers */
xive_error(xive, "IC: forwarded at @0x%"HWADDR_PRIx" IRQ 0x%"PRIx64,
addr, val);
break;
/* VC syncs */
case PNV_XIVE_SYNC_IPI:
case PNV_XIVE_SYNC_HW:
case PNV_XIVE_SYNC_OS_ESC:
case PNV_XIVE_SYNC_HW_ESC:
case PNV_XIVE_SYNC_REDIS:
break;
/* PC syncs */
case PNV_XIVE_SYNC_PULL:
case PNV_XIVE_SYNC_PUSH:
case PNV_XIVE_SYNC_VPC:
break;
default:
xive_error(xive, "IC: invalid notify write @%"HWADDR_PRIx, addr);
}
}
static uint64_t pnv_xive_ic_notify_read(void *opaque, hwaddr addr,
unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
/* loads are invalid */
xive_error(xive, "IC: invalid notify read @%"HWADDR_PRIx, addr);
return -1;
}
static const MemoryRegionOps pnv_xive_ic_notify_ops = {
.read = pnv_xive_ic_notify_read,
.write = pnv_xive_ic_notify_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 8,
.max_access_size = 8,
},
.impl = {
.min_access_size = 8,
.max_access_size = 8,
},
};
/*
* IC - LSI MMIO handlers (not modeled)
*/
static void pnv_xive_ic_lsi_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
xive_error(xive, "IC: LSI invalid write @%"HWADDR_PRIx, addr);
}
static uint64_t pnv_xive_ic_lsi_read(void *opaque, hwaddr addr, unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
xive_error(xive, "IC: LSI invalid read @%"HWADDR_PRIx, addr);
return -1;
}
static const MemoryRegionOps pnv_xive_ic_lsi_ops = {
.read = pnv_xive_ic_lsi_read,
.write = pnv_xive_ic_lsi_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 8,
.max_access_size = 8,
},
.impl = {
.min_access_size = 8,
.max_access_size = 8,
},
};
/*
* IC - Indirect TIMA MMIO handlers
*/
/*
* When the TIMA is accessed from the indirect page, the thread id
* (PIR) has to be configured in the IC registers before. This is used
* for resets and for debug purpose also.
*/
static XiveTCTX *pnv_xive_get_indirect_tctx(PnvXive *xive)
{
uint64_t tctxt_indir = xive->regs[PC_TCTXT_INDIR0 >> 3];
PowerPCCPU *cpu = NULL;
int pir;
if (!(tctxt_indir & PC_TCTXT_INDIR_VALID)) {
xive_error(xive, "IC: no indirect TIMA access in progress");
return NULL;
}
pir = GETFIELD(PC_TCTXT_INDIR_THRDID, tctxt_indir) & 0xff;
cpu = ppc_get_vcpu_by_pir(pir);
if (!cpu) {
xive_error(xive, "IC: invalid PIR %x for indirect access", pir);
return NULL;
}
/* Check that HW thread is XIVE enabled */
if (!(xive->regs[PC_THREAD_EN_REG0 >> 3] & PPC_BIT(pir & 0x3f))) {
xive_error(xive, "IC: CPU %x is not enabled", pir);
}
return XIVE_TCTX(pnv_cpu_state(cpu)->intc);
}
static void xive_tm_indirect_write(void *opaque, hwaddr offset,
uint64_t value, unsigned size)
{
XiveTCTX *tctx = pnv_xive_get_indirect_tctx(PNV_XIVE(opaque));
xive_tctx_tm_write(tctx, offset, value, size);
}
static uint64_t xive_tm_indirect_read(void *opaque, hwaddr offset,
unsigned size)
{
XiveTCTX *tctx = pnv_xive_get_indirect_tctx(PNV_XIVE(opaque));
return xive_tctx_tm_read(tctx, offset, size);
}
static const MemoryRegionOps xive_tm_indirect_ops = {
.read = xive_tm_indirect_read,
.write = xive_tm_indirect_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 8,
},
.impl = {
.min_access_size = 1,
.max_access_size = 8,
},
};
/*
* Interrupt controller XSCOM region.
*/
static uint64_t pnv_xive_xscom_read(void *opaque, hwaddr addr, unsigned size)
{
switch (addr >> 3) {
case X_VC_EQC_CONFIG:
/* FIXME (skiboot): This is the only XSCOM load. Bizarre. */
return VC_EQC_SYNC_MASK;
default:
return pnv_xive_ic_reg_read(opaque, addr, size);
}
}
static void pnv_xive_xscom_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
{
pnv_xive_ic_reg_write(opaque, addr, val, size);
}
static const MemoryRegionOps pnv_xive_xscom_ops = {
.read = pnv_xive_xscom_read,
.write = pnv_xive_xscom_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 8,
.max_access_size = 8,
},
.impl = {
.min_access_size = 8,
.max_access_size = 8,
}
};
/*
* Virtualization Controller MMIO region containing the IPI and END ESB pages
*/
static uint64_t pnv_xive_vc_read(void *opaque, hwaddr offset,
unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
uint64_t edt_index = offset >> pnv_xive_edt_shift(xive);
uint64_t edt_type = 0;
uint64_t edt_offset;
MemTxResult result;
AddressSpace *edt_as = NULL;
uint64_t ret = -1;
if (edt_index < XIVE_TABLE_EDT_MAX) {
edt_type = GETFIELD(CQ_TDR_EDT_TYPE, xive->edt[edt_index]);
}
switch (edt_type) {
case CQ_TDR_EDT_IPI:
edt_as = &xive->ipi_as;
break;
case CQ_TDR_EDT_EQ:
edt_as = &xive->end_as;
break;
default:
xive_error(xive, "VC: invalid EDT type for read @%"HWADDR_PRIx, offset);
return -1;
}
/* Remap the offset for the targeted address space */
edt_offset = pnv_xive_edt_offset(xive, offset, edt_type);
ret = address_space_ldq(edt_as, edt_offset, MEMTXATTRS_UNSPECIFIED,
&result);
if (result != MEMTX_OK) {
xive_error(xive, "VC: %s read failed at @0x%"HWADDR_PRIx " -> @0x%"
HWADDR_PRIx, edt_type == CQ_TDR_EDT_IPI ? "IPI" : "END",
offset, edt_offset);
return -1;
}
return ret;
}
static void pnv_xive_vc_write(void *opaque, hwaddr offset,
uint64_t val, unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
uint64_t edt_index = offset >> pnv_xive_edt_shift(xive);
uint64_t edt_type = 0;
uint64_t edt_offset;
MemTxResult result;
AddressSpace *edt_as = NULL;
if (edt_index < XIVE_TABLE_EDT_MAX) {
edt_type = GETFIELD(CQ_TDR_EDT_TYPE, xive->edt[edt_index]);
}
switch (edt_type) {
case CQ_TDR_EDT_IPI:
edt_as = &xive->ipi_as;
break;
case CQ_TDR_EDT_EQ:
edt_as = &xive->end_as;
break;
default:
xive_error(xive, "VC: invalid EDT type for write @%"HWADDR_PRIx,
offset);
return;
}
/* Remap the offset for the targeted address space */
edt_offset = pnv_xive_edt_offset(xive, offset, edt_type);
address_space_stq(edt_as, edt_offset, val, MEMTXATTRS_UNSPECIFIED, &result);
if (result != MEMTX_OK) {
xive_error(xive, "VC: write failed at @0x%"HWADDR_PRIx, edt_offset);
}
}
static const MemoryRegionOps pnv_xive_vc_ops = {
.read = pnv_xive_vc_read,
.write = pnv_xive_vc_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 8,
.max_access_size = 8,
},
.impl = {
.min_access_size = 8,
.max_access_size = 8,
},
};
/*
* Presenter Controller MMIO region. The Virtualization Controller
* updates the IPB in the NVT table when required. Not modeled.
*/
static uint64_t pnv_xive_pc_read(void *opaque, hwaddr addr,
unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
xive_error(xive, "PC: invalid read @%"HWADDR_PRIx, addr);
return -1;
}
static void pnv_xive_pc_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size)
{
PnvXive *xive = PNV_XIVE(opaque);
xive_error(xive, "PC: invalid write to VC @%"HWADDR_PRIx, addr);
}
static const MemoryRegionOps pnv_xive_pc_ops = {
.read = pnv_xive_pc_read,
.write = pnv_xive_pc_write,
.endianness = DEVICE_BIG_ENDIAN,
.valid = {
.min_access_size = 8,
.max_access_size = 8,
},
.impl = {
.min_access_size = 8,
.max_access_size = 8,
},
};
void pnv_xive_pic_print_info(PnvXive *xive, Monitor *mon)
{
XiveRouter *xrtr = XIVE_ROUTER(xive);
uint8_t blk = xive->chip->chip_id;
uint32_t srcno0 = XIVE_EAS(blk, 0);
uint32_t nr_ipis = pnv_xive_nr_ipis(xive);
uint32_t nr_ends = pnv_xive_nr_ends(xive);
XiveEAS eas;
XiveEND end;
int i;
monitor_printf(mon, "XIVE[%x] Source %08x .. %08x\n", blk, srcno0,
srcno0 + nr_ipis - 1);
xive_source_pic_print_info(&xive->ipi_source, srcno0, mon);
monitor_printf(mon, "XIVE[%x] EAT %08x .. %08x\n", blk, srcno0,
srcno0 + nr_ipis - 1);
for (i = 0; i < nr_ipis; i++) {
if (xive_router_get_eas(xrtr, blk, i, &eas)) {
break;
}
if (!xive_eas_is_masked(&eas)) {
xive_eas_pic_print_info(&eas, i, mon);
}
}
monitor_printf(mon, "XIVE[%x] ENDT %08x .. %08x\n", blk, 0, nr_ends - 1);
for (i = 0; i < nr_ends; i++) {
if (xive_router_get_end(xrtr, blk, i, &end)) {
break;
}
xive_end_pic_print_info(&end, i, mon);
}
monitor_printf(mon, "XIVE[%x] END Escalation %08x .. %08x\n", blk, 0,
nr_ends - 1);
for (i = 0; i < nr_ends; i++) {
if (xive_router_get_end(xrtr, blk, i, &end)) {
break;
}
xive_end_eas_pic_print_info(&end, i, mon);
}
}
static void pnv_xive_reset(void *dev)
{
PnvXive *xive = PNV_XIVE(dev);
XiveSource *xsrc = &xive->ipi_source;
XiveENDSource *end_xsrc = &xive->end_source;
/*
* Use the PnvChip id to identify the XIVE interrupt controller.
* It can be overriden by configuration at runtime.
*/
xive->tctx_chipid = xive->chip->chip_id;
/* Default page size (Should be changed at runtime to 64k) */
xive->ic_shift = xive->vc_shift = xive->pc_shift = 12;
/* Clear subregions */
if (memory_region_is_mapped(&xsrc->esb_mmio)) {
memory_region_del_subregion(&xive->ipi_edt_mmio, &xsrc->esb_mmio);
}
if (memory_region_is_mapped(&xive->ipi_edt_mmio)) {
memory_region_del_subregion(&xive->ipi_mmio, &xive->ipi_edt_mmio);
}
if (memory_region_is_mapped(&end_xsrc->esb_mmio)) {
memory_region_del_subregion(&xive->end_edt_mmio, &end_xsrc->esb_mmio);
}
if (memory_region_is_mapped(&xive->end_edt_mmio)) {
memory_region_del_subregion(&xive->end_mmio, &xive->end_edt_mmio);
}
}
static void pnv_xive_init(Object *obj)
{
PnvXive *xive = PNV_XIVE(obj);
object_initialize_child(obj, "ipi_source", &xive->ipi_source,
sizeof(xive->ipi_source), TYPE_XIVE_SOURCE,
&error_abort, NULL);
object_initialize_child(obj, "end_source", &xive->end_source,
sizeof(xive->end_source), TYPE_XIVE_END_SOURCE,
&error_abort, NULL);
}
/*
* Maximum number of IRQs and ENDs supported by HW
*/
#define PNV_XIVE_NR_IRQS (PNV9_XIVE_VC_SIZE / (1ull << XIVE_ESB_64K_2PAGE))
#define PNV_XIVE_NR_ENDS (PNV9_XIVE_VC_SIZE / (1ull << XIVE_ESB_64K_2PAGE))
static void pnv_xive_realize(DeviceState *dev, Error **errp)
{
PnvXive *xive = PNV_XIVE(dev);
XiveSource *xsrc = &xive->ipi_source;
XiveENDSource *end_xsrc = &xive->end_source;
Error *local_err = NULL;
Object *obj;
obj = object_property_get_link(OBJECT(dev), "chip", &local_err);
if (!obj) {
error_propagate(errp, local_err);
error_prepend(errp, "required link 'chip' not found: ");
return;
}
/* The PnvChip id identifies the XIVE interrupt controller. */
xive->chip = PNV_CHIP(obj);
/*
* The XiveSource and XiveENDSource objects are realized with the
* maximum allowed HW configuration. The ESB MMIO regions will be
* resized dynamically when the controller is configured by the FW
* to limit accesses to resources not provisioned.
*/
object_property_set_int(OBJECT(xsrc), PNV_XIVE_NR_IRQS, "nr-irqs",
&error_fatal);
object_property_add_const_link(OBJECT(xsrc), "xive", OBJECT(xive),
&error_fatal);
object_property_set_bool(OBJECT(xsrc), true, "realized", &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
object_property_set_int(OBJECT(end_xsrc), PNV_XIVE_NR_ENDS, "nr-ends",
&error_fatal);
object_property_add_const_link(OBJECT(end_xsrc), "xive", OBJECT(xive),
&error_fatal);
object_property_set_bool(OBJECT(end_xsrc), true, "realized", &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
/* Default page size. Generally changed at runtime to 64k */
xive->ic_shift = xive->vc_shift = xive->pc_shift = 12;
/* XSCOM region, used for initial configuration of the BARs */
memory_region_init_io(&xive->xscom_regs, OBJECT(dev), &pnv_xive_xscom_ops,
xive, "xscom-xive", PNV9_XSCOM_XIVE_SIZE << 3);
/* Interrupt controller MMIO regions */
memory_region_init(&xive->ic_mmio, OBJECT(dev), "xive-ic",
PNV9_XIVE_IC_SIZE);
memory_region_init_io(&xive->ic_reg_mmio, OBJECT(dev), &pnv_xive_ic_reg_ops,
xive, "xive-ic-reg", 1 << xive->ic_shift);
memory_region_init_io(&xive->ic_notify_mmio, OBJECT(dev),
&pnv_xive_ic_notify_ops,
xive, "xive-ic-notify", 1 << xive->ic_shift);
/* The Pervasive LSI trigger and EOI pages (not modeled) */
memory_region_init_io(&xive->ic_lsi_mmio, OBJECT(dev), &pnv_xive_ic_lsi_ops,
xive, "xive-ic-lsi", 2 << xive->ic_shift);
/* Thread Interrupt Management Area (Indirect) */
memory_region_init_io(&xive->tm_indirect_mmio, OBJECT(dev),
&xive_tm_indirect_ops,
xive, "xive-tima-indirect", PNV9_XIVE_TM_SIZE);
/*
* Overall Virtualization Controller MMIO region containing the
* IPI ESB pages and END ESB pages. The layout is defined by the
* EDT "Domain table" and the accesses are dispatched using
* address spaces for each.
*/
memory_region_init_io(&xive->vc_mmio, OBJECT(xive), &pnv_xive_vc_ops, xive,
"xive-vc", PNV9_XIVE_VC_SIZE);
memory_region_init(&xive->ipi_mmio, OBJECT(xive), "xive-vc-ipi",
PNV9_XIVE_VC_SIZE);
address_space_init(&xive->ipi_as, &xive->ipi_mmio, "xive-vc-ipi");
memory_region_init(&xive->end_mmio, OBJECT(xive), "xive-vc-end",
PNV9_XIVE_VC_SIZE);
address_space_init(&xive->end_as, &xive->end_mmio, "xive-vc-end");
/*
* The MMIO windows exposing the IPI ESBs and the END ESBs in the
* VC region. Their size is configured by the FW in the EDT table.
*/
memory_region_init(&xive->ipi_edt_mmio, OBJECT(xive), "xive-vc-ipi-edt", 0);
memory_region_init(&xive->end_edt_mmio, OBJECT(xive), "xive-vc-end-edt", 0);
/* Presenter Controller MMIO region (not modeled) */
memory_region_init_io(&xive->pc_mmio, OBJECT(xive), &pnv_xive_pc_ops, xive,
"xive-pc", PNV9_XIVE_PC_SIZE);
/* Thread Interrupt Management Area (Direct) */
memory_region_init_io(&xive->tm_mmio, OBJECT(xive), &xive_tm_ops,
xive, "xive-tima", PNV9_XIVE_TM_SIZE);
qemu_register_reset(pnv_xive_reset, dev);
}
static int pnv_xive_dt_xscom(PnvXScomInterface *dev, void *fdt,
int xscom_offset)
{
const char compat[] = "ibm,power9-xive-x";
char *name;
int offset;
uint32_t lpc_pcba = PNV9_XSCOM_XIVE_BASE;
uint32_t reg[] = {
cpu_to_be32(lpc_pcba),
cpu_to_be32(PNV9_XSCOM_XIVE_SIZE)
};
name = g_strdup_printf("xive@%x", lpc_pcba);
offset = fdt_add_subnode(fdt, xscom_offset, name);
_FDT(offset);
g_free(name);
_FDT((fdt_setprop(fdt, offset, "reg", reg, sizeof(reg))));
_FDT((fdt_setprop(fdt, offset, "compatible", compat,
sizeof(compat))));
return 0;
}
static Property pnv_xive_properties[] = {
DEFINE_PROP_UINT64("ic-bar", PnvXive, ic_base, 0),
DEFINE_PROP_UINT64("vc-bar", PnvXive, vc_base, 0),
DEFINE_PROP_UINT64("pc-bar", PnvXive, pc_base, 0),
DEFINE_PROP_UINT64("tm-bar", PnvXive, tm_base, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void pnv_xive_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PnvXScomInterfaceClass *xdc = PNV_XSCOM_INTERFACE_CLASS(klass);
XiveRouterClass *xrc = XIVE_ROUTER_CLASS(klass);
XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass);
xdc->dt_xscom = pnv_xive_dt_xscom;
dc->desc = "PowerNV XIVE Interrupt Controller";
dc->realize = pnv_xive_realize;
dc->props = pnv_xive_properties;
xrc->get_eas = pnv_xive_get_eas;
xrc->get_end = pnv_xive_get_end;
xrc->write_end = pnv_xive_write_end;
xrc->get_nvt = pnv_xive_get_nvt;
xrc->write_nvt = pnv_xive_write_nvt;
xrc->get_tctx = pnv_xive_get_tctx;
xnc->notify = pnv_xive_notify;
};
static const TypeInfo pnv_xive_info = {
.name = TYPE_PNV_XIVE,
.parent = TYPE_XIVE_ROUTER,
.instance_init = pnv_xive_init,
.instance_size = sizeof(PnvXive),
.class_init = pnv_xive_class_init,
.interfaces = (InterfaceInfo[]) {
{ TYPE_PNV_XSCOM_INTERFACE },
{ }
}
};
static void pnv_xive_register_types(void)
{
type_register_static(&pnv_xive_info);
}
type_init(pnv_xive_register_types)
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