diff options
Diffstat (limited to 'hw/intc/xive2.c')
| -rw-r--r-- | hw/intc/xive2.c | 667 |
1 files changed, 667 insertions, 0 deletions
diff --git a/hw/intc/xive2.c b/hw/intc/xive2.c new file mode 100644 index 0000000..0248d43 --- /dev/null +++ b/hw/intc/xive2.c @@ -0,0 +1,667 @@ +/* + * QEMU PowerPC XIVE2 interrupt controller model (POWER10) + * + * Copyright (c) 2019-2022, 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 "hw/qdev-properties.h" +#include "monitor/monitor.h" +#include "hw/ppc/xive.h" +#include "hw/ppc/xive2.h" +#include "hw/ppc/xive2_regs.h" + +void xive2_eas_pic_print_info(Xive2Eas *eas, uint32_t lisn, Monitor *mon) +{ + if (!xive2_eas_is_valid(eas)) { + return; + } + + monitor_printf(mon, " %08x %s end:%02x/%04x data:%08x\n", + lisn, xive2_eas_is_masked(eas) ? "M" : " ", + (uint8_t) xive_get_field64(EAS2_END_BLOCK, eas->w), + (uint32_t) xive_get_field64(EAS2_END_INDEX, eas->w), + (uint32_t) xive_get_field64(EAS2_END_DATA, eas->w)); +} + +void xive2_end_queue_pic_print_info(Xive2End *end, uint32_t width, + Monitor *mon) +{ + uint64_t qaddr_base = xive2_end_qaddr(end); + uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3); + uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1); + uint32_t qentries = 1 << (qsize + 10); + int i; + + /* + * print out the [ (qindex - (width - 1)) .. (qindex + 1)] window + */ + monitor_printf(mon, " [ "); + qindex = (qindex - (width - 1)) & (qentries - 1); + for (i = 0; i < width; i++) { + uint64_t qaddr = qaddr_base + (qindex << 2); + uint32_t qdata = -1; + + if (dma_memory_read(&address_space_memory, qaddr, &qdata, + sizeof(qdata), MEMTXATTRS_UNSPECIFIED)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to read EQ @0x%" + HWADDR_PRIx "\n", qaddr); + return; + } + monitor_printf(mon, "%s%08x ", i == width - 1 ? "^" : "", + be32_to_cpu(qdata)); + qindex = (qindex + 1) & (qentries - 1); + } + monitor_printf(mon, "]"); +} + +void xive2_end_pic_print_info(Xive2End *end, uint32_t end_idx, Monitor *mon) +{ + uint64_t qaddr_base = xive2_end_qaddr(end); + uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1); + uint32_t qgen = xive_get_field32(END2_W1_GENERATION, end->w1); + uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3); + uint32_t qentries = 1 << (qsize + 10); + + uint32_t nvp_blk = xive_get_field32(END2_W6_VP_BLOCK, end->w6); + uint32_t nvp_idx = xive_get_field32(END2_W6_VP_OFFSET, end->w6); + uint8_t priority = xive_get_field32(END2_W7_F0_PRIORITY, end->w7); + uint8_t pq; + + if (!xive2_end_is_valid(end)) { + return; + } + + pq = xive_get_field32(END2_W1_ESn, end->w1); + + monitor_printf(mon, + " %08x %c%c %c%c%c%c%c%c%c%c%c%c prio:%d nvp:%02x/%04x", + end_idx, + pq & XIVE_ESB_VAL_P ? 'P' : '-', + pq & XIVE_ESB_VAL_Q ? 'Q' : '-', + xive2_end_is_valid(end) ? 'v' : '-', + xive2_end_is_enqueue(end) ? 'q' : '-', + xive2_end_is_notify(end) ? 'n' : '-', + xive2_end_is_backlog(end) ? 'b' : '-', + xive2_end_is_escalate(end) ? 'e' : '-', + xive2_end_is_escalate_end(end) ? 'N' : '-', + xive2_end_is_uncond_escalation(end) ? 'u' : '-', + xive2_end_is_silent_escalation(end) ? 's' : '-', + xive2_end_is_firmware1(end) ? 'f' : '-', + xive2_end_is_firmware2(end) ? 'F' : '-', + priority, nvp_blk, nvp_idx); + + if (qaddr_base) { + monitor_printf(mon, " eq:@%08"PRIx64"% 6d/%5d ^%d", + qaddr_base, qindex, qentries, qgen); + xive2_end_queue_pic_print_info(end, 6, mon); + } + monitor_printf(mon, "\n"); +} + +void xive2_end_eas_pic_print_info(Xive2End *end, uint32_t end_idx, + Monitor *mon) +{ + Xive2Eas *eas = (Xive2Eas *) &end->w4; + uint8_t pq; + + if (!xive2_end_is_escalate(end)) { + return; + } + + pq = xive_get_field32(END2_W1_ESe, end->w1); + + monitor_printf(mon, " %08x %c%c %c%c end:%02x/%04x data:%08x\n", + end_idx, + pq & XIVE_ESB_VAL_P ? 'P' : '-', + pq & XIVE_ESB_VAL_Q ? 'Q' : '-', + xive2_eas_is_valid(eas) ? 'v' : ' ', + xive2_eas_is_masked(eas) ? 'M' : ' ', + (uint8_t) xive_get_field64(EAS2_END_BLOCK, eas->w), + (uint32_t) xive_get_field64(EAS2_END_INDEX, eas->w), + (uint32_t) xive_get_field64(EAS2_END_DATA, eas->w)); +} + +static void xive2_end_enqueue(Xive2End *end, uint32_t data) +{ + uint64_t qaddr_base = xive2_end_qaddr(end); + uint32_t qsize = xive_get_field32(END2_W3_QSIZE, end->w3); + uint32_t qindex = xive_get_field32(END2_W1_PAGE_OFF, end->w1); + uint32_t qgen = xive_get_field32(END2_W1_GENERATION, end->w1); + + uint64_t qaddr = qaddr_base + (qindex << 2); + uint32_t qdata = cpu_to_be32((qgen << 31) | (data & 0x7fffffff)); + uint32_t qentries = 1 << (qsize + 10); + + if (dma_memory_write(&address_space_memory, qaddr, &qdata, sizeof(qdata), + MEMTXATTRS_UNSPECIFIED)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to write END data @0x%" + HWADDR_PRIx "\n", qaddr); + return; + } + + qindex = (qindex + 1) & (qentries - 1); + if (qindex == 0) { + qgen ^= 1; + end->w1 = xive_set_field32(END2_W1_GENERATION, end->w1, qgen); + + /* TODO(PowerNV): reset GF bit on a cache watch operation */ + end->w1 = xive_set_field32(END2_W1_GEN_FLIPPED, end->w1, qgen); + } + end->w1 = xive_set_field32(END2_W1_PAGE_OFF, end->w1, qindex); +} +/* + * XIVE Router (aka. Virtualization Controller or IVRE) + */ + +int xive2_router_get_eas(Xive2Router *xrtr, uint8_t eas_blk, uint32_t eas_idx, + Xive2Eas *eas) +{ + Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); + + return xrc->get_eas(xrtr, eas_blk, eas_idx, eas); +} + +int xive2_router_get_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx, + Xive2End *end) +{ + Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); + + return xrc->get_end(xrtr, end_blk, end_idx, end); +} + +int xive2_router_write_end(Xive2Router *xrtr, uint8_t end_blk, uint32_t end_idx, + Xive2End *end, uint8_t word_number) +{ + Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); + + return xrc->write_end(xrtr, end_blk, end_idx, end, word_number); +} + +int xive2_router_get_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx, + Xive2Nvp *nvp) +{ + Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); + + return xrc->get_nvp(xrtr, nvp_blk, nvp_idx, nvp); +} + +int xive2_router_write_nvp(Xive2Router *xrtr, uint8_t nvp_blk, uint32_t nvp_idx, + Xive2Nvp *nvp, uint8_t word_number) +{ + Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); + + return xrc->write_nvp(xrtr, nvp_blk, nvp_idx, nvp, word_number); +} + +static int xive2_router_get_block_id(Xive2Router *xrtr) +{ + Xive2RouterClass *xrc = XIVE2_ROUTER_GET_CLASS(xrtr); + + return xrc->get_block_id(xrtr); +} + +static void xive2_router_realize(DeviceState *dev, Error **errp) +{ + Xive2Router *xrtr = XIVE2_ROUTER(dev); + + assert(xrtr->xfb); +} + +/* + * Notification using the END ESe/ESn bit (Event State Buffer for + * escalation and notification). Profide futher coalescing in the + * Router. + */ +static bool xive2_router_end_es_notify(Xive2Router *xrtr, uint8_t end_blk, + uint32_t end_idx, Xive2End *end, + uint32_t end_esmask) +{ + uint8_t pq = xive_get_field32(end_esmask, end->w1); + bool notify = xive_esb_trigger(&pq); + + if (pq != xive_get_field32(end_esmask, end->w1)) { + end->w1 = xive_set_field32(end_esmask, end->w1, pq); + xive2_router_write_end(xrtr, end_blk, end_idx, end, 1); + } + + /* ESe/n[Q]=1 : end of notification */ + return notify; +} + +/* + * An END trigger can come from an event trigger (IPI or HW) or from + * another chip. We don't model the PowerBus but the END trigger + * message has the same parameters than in the function below. + */ +static void xive2_router_end_notify(Xive2Router *xrtr, uint8_t end_blk, + uint32_t end_idx, uint32_t end_data) +{ + Xive2End end; + uint8_t priority; + uint8_t format; + bool found; + Xive2Nvp nvp; + uint8_t nvp_blk; + uint32_t nvp_idx; + + /* END cache lookup */ + if (xive2_router_get_end(xrtr, end_blk, end_idx, &end)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, + end_idx); + return; + } + + if (!xive2_end_is_valid(&end)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n", + end_blk, end_idx); + return; + } + + if (xive2_end_is_enqueue(&end)) { + xive2_end_enqueue(&end, end_data); + /* Enqueuing event data modifies the EQ toggle and index */ + xive2_router_write_end(xrtr, end_blk, end_idx, &end, 1); + } + + /* + * When the END is silent, we skip the notification part. + */ + if (xive2_end_is_silent_escalation(&end)) { + goto do_escalation; + } + + /* + * The W7 format depends on the F bit in W6. It defines the type + * of the notification : + * + * F=0 : single or multiple NVP notification + * F=1 : User level Event-Based Branch (EBB) notification, no + * priority + */ + format = xive_get_field32(END2_W6_FORMAT_BIT, end.w6); + priority = xive_get_field32(END2_W7_F0_PRIORITY, end.w7); + + /* The END is masked */ + if (format == 0 && priority == 0xff) { + return; + } + + /* + * Check the END ESn (Event State Buffer for notification) for + * even futher coalescing in the Router + */ + if (!xive2_end_is_notify(&end)) { + /* ESn[Q]=1 : end of notification */ + if (!xive2_router_end_es_notify(xrtr, end_blk, end_idx, + &end, END2_W1_ESn)) { + return; + } + } + + /* + * Follows IVPE notification + */ + nvp_blk = xive_get_field32(END2_W6_VP_BLOCK, end.w6); + nvp_idx = xive_get_field32(END2_W6_VP_OFFSET, end.w6); + + /* NVP cache lookup */ + if (xive2_router_get_nvp(xrtr, nvp_blk, nvp_idx, &nvp)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: no NVP %x/%x\n", + nvp_blk, nvp_idx); + return; + } + + if (!xive2_nvp_is_valid(&nvp)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: NVP %x/%x is invalid\n", + nvp_blk, nvp_idx); + return; + } + + found = xive_presenter_notify(xrtr->xfb, format, nvp_blk, nvp_idx, + xive_get_field32(END2_W6_IGNORE, end.w7), + priority, + xive_get_field32(END2_W7_F1_LOG_SERVER_ID, end.w7)); + + /* TODO: Auto EOI. */ + + if (found) { + return; + } + + /* + * If no matching NVP is dispatched on a HW thread : + * - specific VP: update the NVP structure if backlog is activated + * - logical server : forward request to IVPE (not supported) + */ + if (xive2_end_is_backlog(&end)) { + uint8_t ipb; + + if (format == 1) { + qemu_log_mask(LOG_GUEST_ERROR, + "XIVE: END %x/%x invalid config: F1 & backlog\n", + end_blk, end_idx); + return; + } + + /* + * Record the IPB in the associated NVP structure for later + * use. The presenter will resend the interrupt when the vCPU + * is dispatched again on a HW thread. + */ + ipb = xive_get_field32(NVP2_W2_IPB, nvp.w2) | + xive_priority_to_ipb(priority); + nvp.w2 = xive_set_field32(NVP2_W2_IPB, nvp.w2, ipb); + xive2_router_write_nvp(xrtr, nvp_blk, nvp_idx, &nvp, 2); + + /* + * On HW, follows a "Broadcast Backlog" to IVPEs + */ + } + +do_escalation: + /* + * If activated, escalate notification using the ESe PQ bits and + * the EAS in w4-5 + */ + if (!xive2_end_is_escalate(&end)) { + return; + } + + /* + * Check the END ESe (Event State Buffer for escalation) for even + * futher coalescing in the Router + */ + if (!xive2_end_is_uncond_escalation(&end)) { + /* ESe[Q]=1 : end of escalation notification */ + if (!xive2_router_end_es_notify(xrtr, end_blk, end_idx, + &end, END2_W1_ESe)) { + return; + } + } + + /* + * The END trigger becomes an Escalation trigger + */ + xive2_router_end_notify(xrtr, + xive_get_field32(END2_W4_END_BLOCK, end.w4), + xive_get_field32(END2_W4_ESC_END_INDEX, end.w4), + xive_get_field32(END2_W5_ESC_END_DATA, end.w5)); +} + +void xive2_router_notify(XiveNotifier *xn, uint32_t lisn) +{ + Xive2Router *xrtr = XIVE2_ROUTER(xn); + uint8_t eas_blk = XIVE_EAS_BLOCK(lisn); + uint32_t eas_idx = XIVE_EAS_INDEX(lisn); + Xive2Eas eas; + + /* EAS cache lookup */ + if (xive2_router_get_eas(xrtr, eas_blk, eas_idx, &eas)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN %x\n", lisn); + return; + } + + if (!xive2_eas_is_valid(&eas)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN %x\n", lisn); + return; + } + + if (xive2_eas_is_masked(&eas)) { + /* Notification completed */ + return; + } + + /* + * The event trigger becomes an END trigger + */ + xive2_router_end_notify(xrtr, + xive_get_field64(EAS2_END_BLOCK, eas.w), + xive_get_field64(EAS2_END_INDEX, eas.w), + xive_get_field64(EAS2_END_DATA, eas.w)); +} + +static Property xive2_router_properties[] = { + DEFINE_PROP_LINK("xive-fabric", Xive2Router, xfb, + TYPE_XIVE_FABRIC, XiveFabric *), + DEFINE_PROP_END_OF_LIST(), +}; + +static void xive2_router_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + XiveNotifierClass *xnc = XIVE_NOTIFIER_CLASS(klass); + + dc->desc = "XIVE2 Router Engine"; + device_class_set_props(dc, xive2_router_properties); + /* Parent is SysBusDeviceClass. No need to call its realize hook */ + dc->realize = xive2_router_realize; + xnc->notify = xive2_router_notify; +} + +static const TypeInfo xive2_router_info = { + .name = TYPE_XIVE2_ROUTER, + .parent = TYPE_SYS_BUS_DEVICE, + .abstract = true, + .instance_size = sizeof(Xive2Router), + .class_size = sizeof(Xive2RouterClass), + .class_init = xive2_router_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_XIVE_NOTIFIER }, + { TYPE_XIVE_PRESENTER }, + { } + } +}; + +static inline bool addr_is_even(hwaddr addr, uint32_t shift) +{ + return !((addr >> shift) & 1); +} + +static uint64_t xive2_end_source_read(void *opaque, hwaddr addr, unsigned size) +{ + Xive2EndSource *xsrc = XIVE2_END_SOURCE(opaque); + uint32_t offset = addr & 0xFFF; + uint8_t end_blk; + uint32_t end_idx; + Xive2End end; + uint32_t end_esmask; + uint8_t pq; + uint64_t ret; + + /* + * The block id should be deduced from the load address on the END + * ESB MMIO but our model only supports a single block per XIVE chip. + */ + end_blk = xive2_router_get_block_id(xsrc->xrtr); + end_idx = addr >> (xsrc->esb_shift + 1); + + if (xive2_router_get_end(xsrc->xrtr, end_blk, end_idx, &end)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, + end_idx); + return -1; + } + + if (!xive2_end_is_valid(&end)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n", + end_blk, end_idx); + return -1; + } + + end_esmask = addr_is_even(addr, xsrc->esb_shift) ? END2_W1_ESn : + END2_W1_ESe; + pq = xive_get_field32(end_esmask, end.w1); + + switch (offset) { + case XIVE_ESB_LOAD_EOI ... XIVE_ESB_LOAD_EOI + 0x7FF: + ret = xive_esb_eoi(&pq); + + /* Forward the source event notification for routing ?? */ + break; + + case XIVE_ESB_GET ... XIVE_ESB_GET + 0x3FF: + ret = pq; + break; + + case XIVE_ESB_SET_PQ_00 ... XIVE_ESB_SET_PQ_00 + 0x0FF: + case XIVE_ESB_SET_PQ_01 ... XIVE_ESB_SET_PQ_01 + 0x0FF: + case XIVE_ESB_SET_PQ_10 ... XIVE_ESB_SET_PQ_10 + 0x0FF: + case XIVE_ESB_SET_PQ_11 ... XIVE_ESB_SET_PQ_11 + 0x0FF: + ret = xive_esb_set(&pq, (offset >> 8) & 0x3); + break; + default: + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid END ESB load addr %d\n", + offset); + return -1; + } + + if (pq != xive_get_field32(end_esmask, end.w1)) { + end.w1 = xive_set_field32(end_esmask, end.w1, pq); + xive2_router_write_end(xsrc->xrtr, end_blk, end_idx, &end, 1); + } + + return ret; +} + +static void xive2_end_source_write(void *opaque, hwaddr addr, + uint64_t value, unsigned size) +{ + Xive2EndSource *xsrc = XIVE2_END_SOURCE(opaque); + uint32_t offset = addr & 0xFFF; + uint8_t end_blk; + uint32_t end_idx; + Xive2End end; + uint32_t end_esmask; + uint8_t pq; + bool notify = false; + + /* + * The block id should be deduced from the load address on the END + * ESB MMIO but our model only supports a single block per XIVE chip. + */ + end_blk = xive2_router_get_block_id(xsrc->xrtr); + end_idx = addr >> (xsrc->esb_shift + 1); + + if (xive2_router_get_end(xsrc->xrtr, end_blk, end_idx, &end)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: No END %x/%x\n", end_blk, + end_idx); + return; + } + + if (!xive2_end_is_valid(&end)) { + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: END %x/%x is invalid\n", + end_blk, end_idx); + return; + } + + end_esmask = addr_is_even(addr, xsrc->esb_shift) ? END2_W1_ESn : + END2_W1_ESe; + pq = xive_get_field32(end_esmask, end.w1); + + switch (offset) { + case 0 ... 0x3FF: + notify = xive_esb_trigger(&pq); + break; + + case XIVE_ESB_STORE_EOI ... XIVE_ESB_STORE_EOI + 0x3FF: + /* TODO: can we check StoreEOI availability from the router ? */ + notify = xive_esb_eoi(&pq); + break; + + default: + qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid END ESB write addr %d\n", + offset); + return; + } + + if (pq != xive_get_field32(end_esmask, end.w1)) { + end.w1 = xive_set_field32(end_esmask, end.w1, pq); + xive2_router_write_end(xsrc->xrtr, end_blk, end_idx, &end, 1); + } + + /* TODO: Forward the source event notification for routing */ + if (notify) { + ; + } +} + +static const MemoryRegionOps xive2_end_source_ops = { + .read = xive2_end_source_read, + .write = xive2_end_source_write, + .endianness = DEVICE_BIG_ENDIAN, + .valid = { + .min_access_size = 8, + .max_access_size = 8, + }, + .impl = { + .min_access_size = 8, + .max_access_size = 8, + }, +}; + +static void xive2_end_source_realize(DeviceState *dev, Error **errp) +{ + Xive2EndSource *xsrc = XIVE2_END_SOURCE(dev); + + assert(xsrc->xrtr); + + if (!xsrc->nr_ends) { + error_setg(errp, "Number of interrupt needs to be greater than 0"); + return; + } + + if (xsrc->esb_shift != XIVE_ESB_4K && + xsrc->esb_shift != XIVE_ESB_64K) { + error_setg(errp, "Invalid ESB shift setting"); + return; + } + + /* + * Each END is assigned an even/odd pair of MMIO pages, the even page + * manages the ESn field while the odd page manages the ESe field. + */ + memory_region_init_io(&xsrc->esb_mmio, OBJECT(xsrc), + &xive2_end_source_ops, xsrc, "xive.end", + (1ull << (xsrc->esb_shift + 1)) * xsrc->nr_ends); +} + +static Property xive2_end_source_properties[] = { + DEFINE_PROP_UINT32("nr-ends", Xive2EndSource, nr_ends, 0), + DEFINE_PROP_UINT32("shift", Xive2EndSource, esb_shift, XIVE_ESB_64K), + DEFINE_PROP_LINK("xive", Xive2EndSource, xrtr, TYPE_XIVE2_ROUTER, + Xive2Router *), + DEFINE_PROP_END_OF_LIST(), +}; + +static void xive2_end_source_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + + dc->desc = "XIVE END Source"; + device_class_set_props(dc, xive2_end_source_properties); + dc->realize = xive2_end_source_realize; +} + +static const TypeInfo xive2_end_source_info = { + .name = TYPE_XIVE2_END_SOURCE, + .parent = TYPE_DEVICE, + .instance_size = sizeof(Xive2EndSource), + .class_init = xive2_end_source_class_init, +}; + +static void xive2_register_types(void) +{ + type_register_static(&xive2_router_info); + type_register_static(&xive2_end_source_info); +} + +type_init(xive2_register_types) |