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[Qemu-devel] [RFC PATCH v2 17/21] ppc/xive: add hcalls support
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From: |
Cédric Le Goater |
|
Subject: |
[Qemu-devel] [RFC PATCH v2 17/21] ppc/xive: add hcalls support |
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Date: |
Mon, 11 Sep 2017 19:12:31 +0200 |
A set of Hypervisor's call are used to configure the interrupt sources
and the event/notification queues of the guest:
- H_INT_GET_SOURCE_INFO
used to obtain the address of the MMIO page of the Event State
Buffer (PQ bits) entry associated with the source.
- H_INT_SET_SOURCE_CONFIG
assigns a source to a "target".
- H_INT_GET_SOURCE_CONFIG
determines to which "target" and "priority" is assigned to a source
- H_INT_GET_QUEUE_INFO
returns the address of the notification management page associated
with the specified "target" and "priority".
- H_INT_SET_QUEUE_CONFIG
sets or resets the event queue for a given "target" and "priority".
It is also used to set the notification config associated with the
queue, only unconditional notification for the moment. Reset is
performed with a queue size of 0 and queueing is disabled in that
case.
- H_INT_GET_QUEUE_CONFIG
returns the queue settings for a given "target" and "priority".
- H_INT_RESET
resets all of the partition's interrupt exploitation structures to
their initial state, losing all configuration set via the hcalls
H_INT_SET_SOURCE_CONFIG and H_INT_SET_QUEUE_CONFIG.
- H_INT_SYNC
issue a synchronisation on a source to make sure sure all
notifications have reached their queue.
Calls that still need to be addressed :
H_INT_SET_OS_REPORTING_LINE
H_INT_GET_OS_REPORTING_LINE
See the code for more documentation on each hcall.
Signed-off-by: Cédric Le Goater <address@hidden>
---
hw/intc/Makefile.objs | 2 +-
hw/intc/spapr_xive_hcall.c | 876 ++++++++++++++++++++++++++++++++++++++++++++
hw/ppc/spapr.c | 2 +
include/hw/ppc/spapr.h | 15 +-
include/hw/ppc/spapr_xive.h | 4 +
5 files changed, 897 insertions(+), 2 deletions(-)
create mode 100644 hw/intc/spapr_xive_hcall.c
diff --git a/hw/intc/Makefile.objs b/hw/intc/Makefile.objs
index 2dae80bdf611..00a9aea2dd29 100644
--- a/hw/intc/Makefile.objs
+++ b/hw/intc/Makefile.objs
@@ -35,7 +35,7 @@ obj-$(CONFIG_SH4) += sh_intc.o
obj-$(CONFIG_XICS) += xics.o
obj-$(CONFIG_XICS_SPAPR) += xics_spapr.o
obj-$(CONFIG_XICS_KVM) += xics_kvm.o
-obj-$(CONFIG_XIVE_SPAPR) += spapr_xive.o
+obj-$(CONFIG_XIVE_SPAPR) += spapr_xive.o spapr_xive_hcall.o
obj-$(CONFIG_POWERNV) += xics_pnv.o
obj-$(CONFIG_ALLWINNER_A10_PIC) += allwinner-a10-pic.o
obj-$(CONFIG_S390_FLIC) += s390_flic.o
diff --git a/hw/intc/spapr_xive_hcall.c b/hw/intc/spapr_xive_hcall.c
new file mode 100644
index 000000000000..4c77b65683de
--- /dev/null
+++ b/hw/intc/spapr_xive_hcall.c
@@ -0,0 +1,876 @@
+/*
+ * QEMU PowerPC sPAPR XIVE model
+ *
+ * Copyright (c) 2017, IBM Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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 "qemu/log.h"
+#include "qapi/error.h"
+#include "cpu.h"
+#include "hw/ppc/spapr.h"
+#include "hw/ppc/spapr_xive.h"
+#include "hw/ppc/fdt.h"
+#include "monitor/monitor.h"
+
+#include "xive-internal.h"
+
+/*
+ * TODO: check the valid priorities from the ranges listed in the
+ * "ibm,plat-res-int-priorities" property. Be simple for the moment.
+ */
+static bool priority_is_valid(int priority)
+{
+ return priority >= 0 && priority < 8;
+}
+
+/*
+ * The H_INT_GET_SOURCE_INFO hcall() is used to obtain the logical
+ * real address of the MMIO page through which the Event State Buffer
+ * entry associated with the value of the "lisn" parameter is managed.
+ *
+ * Parameters:
+ * Input
+ * - "flags"
+ * Bits 0-63 reserved
+ * - "lisn" is per "interrupts", "interrupt-map", or
+ * "ibm,xive-lisn-ranges" properties, or as returned by the
+ * ibm,query-interrupt-source-number RTAS call, or as returned
+ * by the H_ALLOCATE_VAS_WINDOW hcall
+ *
+ * Output
+ * - R4: "flags"
+ * Bits 0-59: Reserved
+ * Bit 60: H_INT_ESB must be used for Event State Buffer
+ * management
+ * Bit 61: 1 == LSI 0 == MSI
+ * Bit 62: the full function page supports trigger
+ * Bit 63: Store EOI Supported
+ * - R5: Logical Real address of full function Event State Buffer
+ * management page, -1 if ESB hcall flag is set to 1.
+ * - R6: Logical Real Address of trigger only Event State Buffer
+ * management page or -1.
+ * - R7: Power of 2 page size for the ESB management pages returned in
+ * R5 and R6.
+ */
+static target_ulong h_int_get_source_info(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ sPAPRXive *xive = spapr->xive;
+ XiveIVE *ive;
+ target_ulong flags = args[0];
+ target_ulong lisn = args[1];
+ uint64_t mmio_base;
+ ICSIRQState *irq;
+ uint32_t srcno = lisn - spapr->ics->offset;
+
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ if (flags) {
+ return H_PARAMETER;
+ }
+
+ /*
+ * H_STATE should be returned if a H_INT_RESET is in progress.
+ * This is not needed when running the emulation under QEMU
+ */
+
+ ive = spapr_xive_get_ive(spapr->xive, srcno);
+ if (!ive || !(ive->w & IVE_VALID)) {
+ return H_P2;
+ }
+
+ mmio_base = (uint64_t)xive->esb_base + (1ull << xive->esb_shift) * srcno;
+ irq = &spapr->ics->irqs[srcno];
+
+ args[0] = 0;
+ if (irq->flags & XICS_FLAGS_IRQ_LSI) {
+ args[0] |= XIVE_SRC_LSI;
+ }
+ if (xive->flags & XIVE_SRC_TRIGGER) {
+ args[0] |= XIVE_SRC_TRIGGER;
+ }
+
+ if (xive->flags & XIVE_SRC_H_INT_ESB) {
+ args[1] = -1; /* never used in QEMU */
+ args[2] = -1;
+ } else {
+ args[1] = mmio_base;
+ if (xive->flags & XIVE_SRC_TRIGGER) {
+ args[2] = -1; /* No specific trigger page */
+ } else {
+ args[2] = -1; /* TODO: support for specific trigger page */
+ }
+ }
+
+ args[3] = xive->esb_shift;
+
+ return H_SUCCESS;
+}
+
+/*
+ * The H_INT_SET_SOURCE_CONFIG hcall() is used to assign a Logical
+ * Interrupt Source to a target. The Logical Interrupt Source is
+ * designated with the "lisn" parameter and the target is designated
+ * with the "target" and "priority" parameters. Upon return from the
+ * hcall(), no additional interrupts will be directed to the old EQ.
+ *
+ * TODO: The old EQ should be investigated for interrupts that
+ * occurred prior to or during the hcall().
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-61: Reserved
+ * Bit 62: set the "eisn" in the EA
+ * Bit 63: masks the interrupt source in the hardware interrupt
+ * control structure. An interrupt masked by this mechanism will
+ * be dropped, but it's source state bits will still be
+ * set. There is no race-free way of unmasking and restoring the
+ * source. Thus this should only be used in interrupts that are
+ * also masked at the source, and only in cases where the
+ * interrupt is not meant to be used for a large amount of time
+ * because no valid target exists for it for example
+ * - "lisn" is per "interrupts", "interrupt-map", or
+ * "ibm,xive-lisn-ranges" properties, or as returned by the
+ * ibm,query-interrupt-source-number RTAS call, or as returned by
+ * the H_ALLOCATE_VAS_WINDOW hcall
+ * - "target" is per "ibm,ppc-interrupt-server#s" or
+ * "ibm,ppc-interrupt-gserver#s"
+ * - "priority" is a valid priority not in
+ * "ibm,plat-res-int-priorities"
+ * - "eisn" is the guest EISN associated with the "lisn"
+ *
+ * Output:
+ * - None
+ */
+
+#define XIVE_SRC_SET_EISN (1ull << (63 - 62))
+#define XIVE_SRC_MASK (1ull << (63 - 63))
+
+static target_ulong h_int_set_source_config(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ XiveIVE *ive;
+ uint64_t new_ive;
+ target_ulong flags = args[0];
+ target_ulong lisn = args[1];
+ target_ulong target = args[2];
+ target_ulong priority = args[3];
+ target_ulong eisn = args[4];
+ uint32_t eq_idx;
+ uint32_t srcno = lisn - spapr->ics->offset;
+
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ if (flags & ~(XIVE_SRC_SET_EISN | XIVE_SRC_MASK)) {
+ return H_PARAMETER;
+ }
+
+ /*
+ * H_STATE should be returned if a H_INT_RESET is in progress.
+ * This is not needed when running the emulation under QEMU
+ */
+
+ ive = spapr_xive_get_ive(spapr->xive, srcno);
+ if (!ive || !(ive->w & IVE_VALID)) {
+ return H_P2;
+ }
+
+ /* priority 0xff is used to reset the IVE */
+ if (priority == 0xff) {
+ new_ive = IVE_VALID | IVE_MASKED;
+ goto out;
+ }
+
+ new_ive = ive->w;
+
+ if (flags & XIVE_SRC_MASK) {
+ new_ive = ive->w | IVE_MASKED;
+ } else {
+ new_ive = ive->w & ~IVE_MASKED;
+ }
+
+ if (!priority_is_valid(priority)) {
+ return H_P4;
+ }
+
+ /* TODO: If the partition thread count is greater than the
+ * hardware thread count, validate the "target" has a
+ * corresponding hardware thread else return H_NOT_AVAILABLE.
+ */
+
+ /* Validate that "target" is part of the list of threads allocated
+ * to the partition. For that, find the EQ corresponding to the
+ * target.
+ */
+ if (!spapr_xive_eq_for_target(spapr->xive, target, priority, &eq_idx)) {
+ return H_P3;
+ }
+
+ new_ive = SETFIELD(IVE_EQ_BLOCK, new_ive, 0ul);
+ new_ive = SETFIELD(IVE_EQ_INDEX, new_ive, eq_idx);
+
+ if (flags & XIVE_SRC_SET_EISN) {
+ new_ive = SETFIELD(IVE_EQ_DATA, new_ive, eisn);
+ }
+
+out:
+ /* TODO: handle syncs ? */
+
+ /* And update */
+ ive->w = new_ive;
+
+ return H_SUCCESS;
+}
+
+/*
+ * The H_INT_GET_SOURCE_CONFIG hcall() is used to determine to which
+ * target/priority pair is assigned to the specified Logical Interrupt
+ * Source.
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-63 Reserved
+ * - "lisn" is per "interrupts", "interrupt-map", or
+ * "ibm,xive-lisn-ranges" properties, or as returned by the
+ * ibm,query-interrupt-source-number RTAS call, or as
+ * returned by the H_ALLOCATE_VAS_WINDOW hcall
+ *
+ * Output:
+ * - R4: Target to which the specified Logical Interrupt Source is
+ * assigned
+ * - R5: Priority to which the specified Logical Interrupt Source is
+ * assigned
+ * - R6: EISN for the specified Logical Interrupt Source (this will be
+ * equivalent to the LISN if not changed by H_INT_SET_SOURCE_CONFIG)
+ */
+static target_ulong h_int_get_source_config(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ target_ulong flags = args[0];
+ target_ulong lisn = args[1];
+ XiveIVE *ive;
+ XiveEQ *eq;
+ uint32_t eq_idx;
+ uint32_t srcno = lisn - spapr->ics->offset;
+
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ if (flags) {
+ return H_PARAMETER;
+ }
+
+ /*
+ * H_STATE should be returned if a H_INT_RESET is in progress.
+ * This is not needed when running the emulation under QEMU
+ */
+
+ ive = spapr_xive_get_ive(spapr->xive, srcno);
+ if (!ive || !(ive->w & IVE_VALID)) {
+ return H_P2;
+ }
+
+ eq_idx = GETFIELD(IVE_EQ_INDEX, ive->w);
+ eq = spapr_xive_get_eq(spapr->xive, eq_idx);
+ if (!eq) {
+ return H_HARDWARE;
+ }
+
+ args[0] = GETFIELD(EQ_W6_NVT_INDEX, eq->w6);
+
+ if (ive->w & IVE_MASKED) {
+ args[1] = 0xff;
+ } else {
+ args[1] = GETFIELD(EQ_W7_F0_PRIORITY, eq->w7);
+ }
+
+ args[2] = GETFIELD(IVE_EQ_DATA, ive->w);
+
+ return H_SUCCESS;
+}
+
+/*
+ * The H_INT_GET_QUEUE_INFO hcall() is used to get the logical real
+ * address of the notification management page associated with the
+ * specified target and priority.
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-63 Reserved
+ * - "target" is per "ibm,ppc-interrupt-server#s" or
+ * "ibm,ppc-interrupt-gserver#s"
+ * - "priority" is a valid priority not in
+ * "ibm,plat-res-int-priorities"
+ *
+ * Output:
+ * - R4: Logical real address of notification page
+ * - R5: Power of 2 page size of the notification page
+ */
+static target_ulong h_int_get_queue_info(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ target_ulong flags = args[0];
+ target_ulong target = args[1];
+ target_ulong priority = args[2];
+ uint32_t eq_idx;
+ XiveEQ *eq;
+
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ if (flags) {
+ return H_PARAMETER;
+ }
+
+ /*
+ * H_STATE should be returned if a H_INT_RESET is in progress.
+ * This is not needed when running the emulation under QEMU
+ */
+
+ if (!priority_is_valid(priority)) {
+ return H_P3;
+ }
+
+ /* Validate that "target" is part of the list of threads allocated
+ * to the partition. For that, find the EQ corresponding to the
+ * target.
+ */
+ if (!spapr_xive_eq_for_target(spapr->xive, target, priority, &eq_idx)) {
+ return H_P2;
+ }
+
+ /* TODO: If the partition thread count is greater than the
+ * hardware thread count, validate the "target" has a
+ * corresponding hardware thread else return H_NOT_AVAILABLE.
+ */
+
+ eq = spapr_xive_get_eq(spapr->xive, eq_idx);
+ if (!eq) {
+ return H_HARDWARE;
+ }
+
+ args[0] = -1; /* TODO: return ESn page */
+ if (eq->w0 & EQ_W0_ENQUEUE) {
+ args[1] = GETFIELD(EQ_W0_QSIZE, eq->w0) + 12;
+ } else {
+ args[1] = 0;
+ }
+
+ return H_SUCCESS;
+}
+
+/*
+ * The H_INT_SET_QUEUE_CONFIG hcall() is used to set or reset a EQ for
+ * a given "target" and "priority". It is also used to set the
+ * notification config associated with the EQ. An EQ size of 0 is
+ * used to reset the EQ config for a given target and priority. If
+ * resetting the EQ config, the END associated with the given "target"
+ * and "priority" will be changed to disable queueing.
+ *
+ * Upon return from the hcall(), no additional interrupts will be
+ * directed to the old EQ (if one was set). The old EQ (if one was
+ * set) should be investigated for interrupts that occurred prior to
+ * or during the hcall().
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-62: Reserved
+ * Bit 63: Unconditional Notify (n) per the XIVE spec
+ * - "target" is per "ibm,ppc-interrupt-server#s" or
+ * "ibm,ppc-interrupt-gserver#s"
+ * - "priority" is a valid priority not in
+ * "ibm,plat-res-int-priorities"
+ * - "eventQueue": The logical real address of the start of the EQ
+ * - "eventQueueSize": The power of 2 EQ size per "ibm,xive-eq-sizes"
+ *
+ * Output:
+ * - None
+ */
+
+#define XIVE_EQ_ALWAYS_NOTIFY (1ull << (63 - 63))
+
+static target_ulong h_int_set_queue_config(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ target_ulong flags = args[0];
+ target_ulong target = args[1];
+ target_ulong priority = args[2];
+ target_ulong qpage = args[3];
+ target_ulong qsize = args[4];
+ uint32_t eq_idx;
+ XiveEQ *old_eq;
+ XiveEQ eq;
+ uint32_t qdata;
+
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ if (flags & ~XIVE_EQ_ALWAYS_NOTIFY) {
+ return H_PARAMETER;
+ }
+
+ /*
+ * H_STATE should be returned if a H_INT_RESET is in progress.
+ * This is not needed when running the emulation under QEMU
+ */
+
+ if (!priority_is_valid(priority)) {
+ return H_P3;
+ }
+
+ /* Validate that "target" is part of the list of threads allocated
+ * to the partition. For that, find the EQ corresponding to the
+ * target.
+ */
+ if (!spapr_xive_eq_for_target(spapr->xive, target, priority, &eq_idx)) {
+ return H_P2;
+ }
+
+ /* TODO: If the partition thread count is greater than the
+ * hardware thread count, validate the "target" has a
+ * corresponding hardware thread else return H_NOT_AVAILABLE.
+ */
+
+ old_eq = spapr_xive_get_eq(spapr->xive, eq_idx);
+ if (!old_eq) {
+ return H_HARDWARE;
+ }
+
+ eq = *old_eq;
+
+ switch (qsize) {
+ case 12:
+ case 16:
+ case 21:
+ case 24:
+ eq.w3 = ((uint64_t)qpage) & 0xffffffff;
+ eq.w2 = (((uint64_t)qpage)) >> 32 & 0x0fffffff;
+ eq.w0 |= EQ_W0_ENQUEUE;
+ eq.w0 = SETFIELD(EQ_W0_QSIZE, eq.w0, qsize - 12);
+ break;
+ case 0:
+ /* reset queue and disable queueing */
+ eq.w2 = eq.w3 = 0;
+ eq.w0 &= ~EQ_W0_ENQUEUE;
+ break;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid EQ size %"PRIx64"\n",
+ __func__, qsize);
+ return H_P5;
+ }
+
+ if (qsize) {
+ /*
+ * Let's validate the EQ address with a read of the first EQ
+ * entry. We could also check that the full queue has been
+ * zeroed by the OS.
+ */
+ if (address_space_read(&address_space_memory, qpage,
+ MEMTXATTRS_UNSPECIFIED,
+ (uint8_t *) &qdata, sizeof(qdata))) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: failed to read EQ data @0x%"
+ HWADDR_PRIx "\n", __func__, qpage);
+ return H_P4;
+ }
+ }
+
+ /* Ensure the priority and target are correctly set (they will not
+ * be right after allocation)
+ */
+ eq.w6 = SETFIELD(EQ_W6_NVT_BLOCK, 0ul, 0ul) |
+ SETFIELD(EQ_W6_NVT_INDEX, 0ul, target);
+ eq.w7 = SETFIELD(EQ_W7_F0_PRIORITY, 0ul, priority);
+
+ /* TODO: depends on notitification page (ESn) from H_INT_GET_QUEUE_INFO */
+ if (flags & XIVE_EQ_ALWAYS_NOTIFY) {
+ eq.w0 |= EQ_W0_UCOND_NOTIFY;
+ }
+
+ /* The generation bit for the EQ starts at 1 and The EQ page
+ * offset counter starts at 0.
+ */
+ eq.w1 = EQ_W1_GENERATION | SETFIELD(EQ_W1_PAGE_OFF, 0ul, 0ul);
+ eq.w0 |= EQ_W0_VALID;
+
+ /* TODO: issue syncs required to ensure all in-flight interrupts
+ * are complete on the old EQ */
+
+ /* Update EQ */
+ *old_eq = eq;
+
+ return H_SUCCESS;
+}
+
+/*
+ * The H_INT_GET_QUEUE_CONFIG hcall() is used to get a EQ for a given
+ * target and priority.
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-62: Reserved
+ * Bit 63: Debug: Return debug data
+ * - "target" is per "ibm,ppc-interrupt-server#s" or
+ * "ibm,ppc-interrupt-gserver#s"
+ * - "priority" is a valid priority not in
+ * "ibm,plat-res-int-priorities"
+ *
+ * Output:
+ * - R4: "flags":
+ * Bits 0-62: Reserved
+ * Bit 63: The value of Unconditional Notify (n) per the XIVE spec
+ * - R5: The logical real address of the start of the EQ
+ * - R6: The power of 2 EQ size per "ibm,xive-eq-sizes"
+ * - R7: The value of Event Queue Offset Counter per XIVE spec
+ * if "Debug" = 1, else 0
+ *
+ */
+
+#define XIVE_EQ_DEBUG (1ull << (63 - 63))
+
+static target_ulong h_int_get_queue_config(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ target_ulong flags = args[0];
+ target_ulong target = args[1];
+ target_ulong priority = args[2];
+ uint32_t eq_idx;
+ XiveEQ *eq;
+
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ if (flags & ~XIVE_EQ_DEBUG) {
+ return H_PARAMETER;
+ }
+
+ /*
+ * H_STATE should be returned if a H_INT_RESET is in progress.
+ * This is not needed when running the emulation under QEMU
+ */
+
+ if (!priority_is_valid(priority)) {
+ return H_P3;
+ }
+
+ /* Validate that "target" is part of the list of threads allocated
+ * to the partition. For that, find the EQ corresponding to the
+ * target.
+ */
+ if (!spapr_xive_eq_for_target(spapr->xive, target, priority, &eq_idx)) {
+ return H_P2;
+ }
+
+ /* TODO: If the partition thread count is greater than the
+ * hardware thread count, validate the "target" has a
+ * corresponding hardware thread else return H_NOT_AVAILABLE.
+ */
+
+ eq = spapr_xive_get_eq(spapr->xive, eq_idx);
+ if (!eq) {
+ return H_HARDWARE;
+ }
+
+ args[0] = 0;
+ if (eq->w0 & EQ_W0_UCOND_NOTIFY) {
+ args[0] |= XIVE_EQ_ALWAYS_NOTIFY;
+ }
+
+ if (eq->w0 & EQ_W0_ENQUEUE) {
+ args[1] =
+ (((uint64_t)(eq->w2 & 0x0fffffff)) << 32) | eq->w3;
+ args[2] = GETFIELD(EQ_W0_QSIZE, eq->w0) + 12;
+ } else {
+ args[1] = 0;
+ args[2] = 0;
+ }
+
+ /* TODO: do we need any locking on the EQ ? */
+ if (flags & XIVE_EQ_DEBUG) {
+ /* Load the event queue generation number into the return flags */
+ args[0] |= GETFIELD(EQ_W1_GENERATION, eq->w1);
+
+ /* Load R7 with the event queue offset counter */
+ args[3] = GETFIELD(EQ_W1_PAGE_OFF, eq->w1);
+ }
+
+ return H_SUCCESS;
+}
+
+/*
+ * The H_INT_SET_OS_REPORTING_LINE hcall() is used to set the
+ * reporting cache line pair for the calling thread. The reporting
+ * cache lines will contain the OS interrupt context when the OS
+ * issues a CI store byte to @TIMA+0xC10 to acknowledge the OS
+ * interrupt. The reporting cache lines can be reset by inputting -1
+ * in "reportingLine". Issuing the CI store byte without reporting
+ * cache lines registered will result in the data not being accessible
+ * to the OS.
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-63: Reserved
+ * - "reportingLine": The logical real address of the reporting cache
+ * line pair
+ *
+ * Output:
+ * - None
+ */
+static target_ulong h_int_set_os_reporting_line(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ /*
+ * H_STATE should be returned if a H_INT_RESET is in progress.
+ * This is not needed when running the emulation under QEMU
+ */
+
+ /* TODO: H_INT_SET_OS_REPORTING_LINE */
+ return H_FUNCTION;
+}
+
+/*
+ * The H_INT_GET_OS_REPORTING_LINE hcall() is used to get the logical
+ * real address of the reporting cache line pair set for the input
+ * "target". If no reporting cache line pair has been set, -1 is
+ * returned.
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-63: Reserved
+ * - "target" is per "ibm,ppc-interrupt-server#s" or
+ * "ibm,ppc-interrupt-gserver#s"
+ * - "reportingLine": The logical real address of the reporting cache
+ * line pair
+ *
+ * Output:
+ * - R4: The logical real address of the reporting line if set, else -1
+ */
+static target_ulong h_int_get_os_reporting_line(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ /*
+ * H_STATE should be returned if a H_INT_RESET is in progress.
+ * This is not needed when running the emulation under QEMU
+ */
+
+ /* TODO: H_INT_GET_OS_REPORTING_LINE */
+ return H_FUNCTION;
+}
+
+/*
+ * The H_INT_ESB hcall() is used to issue a load or store to the ESB
+ * page for the input "lisn". This hcall is only supported for LISNs
+ * that have the ESB hcall flag set to 1 when returned from hcall()
+ * H_INT_GET_SOURCE_INFO.
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-62: Reserved
+ * bit 63: Store: Store=1, store operation, else load operation
+ * - "lisn" is per "interrupts", "interrupt-map", or
+ * "ibm,xive-lisn-ranges" properties, or as returned by the
+ * ibm,query-interrupt-source-number RTAS call, or as
+ * returned by the H_ALLOCATE_VAS_WINDOW hcall
+ * - "esbOffset" is the offset into the ESB page for the load or store
operation
+ * - "storeData" is the data to write for a store operation
+ *
+ * Output:
+ * - R4: R4: The value of the load if load operation, else -1
+ */
+
+#define XIVE_ESB_STORE (1ull << (63 - 63))
+
+static target_ulong h_int_esb(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ sPAPRXive *xive = spapr->xive;
+ XiveIVE *ive;
+ target_ulong flags = args[0];
+ target_ulong lisn = args[1];
+ target_ulong offset = args[2];
+ target_ulong data = args[3];
+ uint64_t esb_base;
+ uint32_t srcno = lisn - spapr->ics->offset;
+
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ if (flags & ~XIVE_ESB_STORE) {
+ return H_PARAMETER;
+ }
+
+ ive = spapr_xive_get_ive(xive, srcno);
+ if (!ive || !(ive->w & IVE_VALID)) {
+ return H_P2;
+ }
+
+ if (offset > (1ull << xive->esb_shift)) {
+ return H_P3;
+ }
+
+ srcno = lisn - spapr->ics->offset;
+ esb_base = (uint64_t)xive->esb_base + (1ull << xive->esb_shift) * srcno;
+ esb_base += offset;
+
+ if (dma_memory_rw(&address_space_memory, esb_base, &data, 8,
+ (flags & XIVE_ESB_STORE))) {
+ qemu_log_mask(LOG_GUEST_ERROR, "%s: failed to rw data @0x%"
+ HWADDR_PRIx "\n", __func__, esb_base);
+ return H_HARDWARE;
+ }
+ args[0] = (flags & XIVE_ESB_STORE) ? -1 : data;
+ return H_SUCCESS;
+}
+
+/*
+ * The H_INT_SYNC hcall() is used to issue hardware syncs that will
+ * ensure any in flight events for the input lisn are in the event
+ * queue.
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-63: Reserved
+ * - "lisn" is per "interrupts", "interrupt-map", or
+ * "ibm,xive-lisn-ranges" properties, or as returned by the
+ * ibm,query-interrupt-source-number RTAS call, or as
+ * returned by the H_ALLOCATE_VAS_WINDOW hcall
+ *
+ * Output:
+ * - None
+ */
+static target_ulong h_int_sync(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ XiveIVE *ive;
+ target_ulong flags = args[0];
+ target_ulong lisn = args[1];
+ uint32_t srcno = lisn - spapr->ics->offset;
+
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ if (flags) {
+ return H_PARAMETER;
+ }
+
+ ive = spapr_xive_get_ive(spapr->xive, srcno);
+ if (!ive || !(ive->w & IVE_VALID)) {
+ return H_P2;
+ }
+
+ /*
+ * H_STATE should be returned if a H_INT_RESET is in progress.
+ * This is not needed when running the emulation under QEMU
+ */
+
+ /* This is not real hardware. Nothing to be done */
+ return H_SUCCESS;
+}
+
+/*
+ * The H_INT_RESET hcall() is used to reset all of the partition's
+ * interrupt exploitation structures to their initial state. This
+ * means losing all previously set interrupt state set via
+ * H_INT_SET_SOURCE_CONFIG and H_INT_SET_QUEUE_CONFIG.
+ *
+ * Parameters:
+ * Input:
+ * - "flags"
+ * Bits 0-63: Reserved
+ *
+ * Output:
+ * - None
+ */
+static target_ulong h_int_reset(PowerPCCPU *cpu,
+ sPAPRMachineState *spapr,
+ target_ulong opcode,
+ target_ulong *args)
+{
+ target_ulong flags = args[0];
+
+ if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
+ return H_FUNCTION;
+ }
+
+ if (flags) {
+ return H_PARAMETER;
+ }
+
+ spapr_xive_reset(spapr->xive);
+ return H_SUCCESS;
+}
+
+void spapr_xive_hcall_init(sPAPRMachineState *spapr)
+{
+ spapr_register_hypercall(H_INT_GET_SOURCE_INFO, h_int_get_source_info);
+ spapr_register_hypercall(H_INT_SET_SOURCE_CONFIG, h_int_set_source_config);
+ spapr_register_hypercall(H_INT_GET_SOURCE_CONFIG, h_int_get_source_config);
+ spapr_register_hypercall(H_INT_GET_QUEUE_INFO, h_int_get_queue_info);
+ spapr_register_hypercall(H_INT_SET_QUEUE_CONFIG, h_int_set_queue_config);
+ spapr_register_hypercall(H_INT_GET_QUEUE_CONFIG, h_int_get_queue_config);
+ spapr_register_hypercall(H_INT_SET_OS_REPORTING_LINE,
+ h_int_set_os_reporting_line);
+ spapr_register_hypercall(H_INT_GET_OS_REPORTING_LINE,
+ h_int_get_os_reporting_line);
+ spapr_register_hypercall(H_INT_ESB, h_int_esb);
+ spapr_register_hypercall(H_INT_SYNC, h_int_sync);
+ spapr_register_hypercall(H_INT_RESET, h_int_reset);
+}
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index b6577dbecdea..c2011cb2dc72 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -227,6 +227,8 @@ static sPAPRXive *spapr_spapr_xive_create(sPAPRMachineState
*spapr, int nr_irqs,
goto error;
}
+ spapr_xive_hcall_init(spapr);
+
return SPAPR_XIVE(obj);
error:
error_propagate(errp, local_err);
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 6cd5ab73c5dc..b7683fae6415 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -387,7 +387,20 @@ struct sPAPRMachineState {
#define H_INVALIDATE_PID 0x378
#define H_REGISTER_PROC_TBL 0x37C
#define H_SIGNAL_SYS_RESET 0x380
-#define MAX_HCALL_OPCODE H_SIGNAL_SYS_RESET
+
+#define H_INT_GET_SOURCE_INFO 0x3A8
+#define H_INT_SET_SOURCE_CONFIG 0x3AC
+#define H_INT_GET_SOURCE_CONFIG 0x3B0
+#define H_INT_GET_QUEUE_INFO 0x3B4
+#define H_INT_SET_QUEUE_CONFIG 0x3B8
+#define H_INT_GET_QUEUE_CONFIG 0x3BC
+#define H_INT_SET_OS_REPORTING_LINE 0x3C0
+#define H_INT_GET_OS_REPORTING_LINE 0x3C4
+#define H_INT_ESB 0x3C8
+#define H_INT_SYNC 0x3CC
+#define H_INT_RESET 0x3D0
+
+#define MAX_HCALL_OPCODE H_INT_RESET
/* The hcalls above are standardized in PAPR and implemented by pHyp
* as well.
diff --git a/include/hw/ppc/spapr_xive.h b/include/hw/ppc/spapr_xive.h
index 3af01a0a4b22..ae5ff89533c0 100644
--- a/include/hw/ppc/spapr_xive.h
+++ b/include/hw/ppc/spapr_xive.h
@@ -66,4 +66,8 @@ struct sPAPRXive {
MemoryRegion tm_iomem;
};
+typedef struct sPAPRMachineState sPAPRMachineState;
+
+void spapr_xive_hcall_init(sPAPRMachineState *spapr);
+
#endif /* PPC_SPAPR_XIVE_H */
--
2.13.5
- [Qemu-devel] [RFC PATCH v2 14/21] ppc/xive: add support for the SET_OS_PENDING command, (continued)
- [Qemu-devel] [RFC PATCH v2 15/21] spapr: modify spapr_populate_pci_dt() to use a 'nr_irqs' argument, Cédric Le Goater, 2017/09/11
- [Qemu-devel] [RFC PATCH v2 16/21] spapr: add a XIVE object to the sPAPR machine, Cédric Le Goater, 2017/09/11
- [Qemu-devel] [RFC PATCH v2 17/21] ppc/xive: add hcalls support,
Cédric Le Goater <=
- [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, Cédric Le Goater, 2017/09/11
- Re: [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, David Gibson, 2017/09/19
- Re: [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, Cédric Le Goater, 2017/09/20
- Re: [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, David Gibson, 2017/09/20
- Re: [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, Cédric Le Goater, 2017/09/21
- Re: [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, David Gibson, 2017/09/22
- Re: [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, Benjamin Herrenschmidt, 2017/09/28
- Re: [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, Cédric Le Goater, 2017/09/28
- Re: [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, Benjamin Herrenschmidt, 2017/09/28
- Re: [Qemu-devel] [RFC PATCH v2 18/21] ppc/xive: add device tree support, Cédric Le Goater, 2017/09/28