[Qemu-ppc] [PATCH v2 12/19] spapr: add hcalls support for the XIVE exploitation interrupt mode

[Cédric Le Goater]

The different XIVE virtualization engines (sources and event queues)
are configured with a set of Hypervisor calls :

 - 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 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 configuration associated
   with the queue, only unconditional notification is supported 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 guest's internal interrupt 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 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.

All sources are emulated under the main XIVE object and share the same
characteristics :

    XIVE_SRC_TRIGGER | XIVE_SRC_STORE_EOI;

Signed-off-by: Cédric Le Goater <address@hidden>
---

 Changes since v1:

 - simplified priority_is_valid() routine (to its minimum)
 - used PPC_BIT() macros to define the hcall flags
 - removed useless casts
 - defined the default characteristic of the single XIVE interrupt
   source to be : *XIVE_SRC_TRIGGER | XIVE_SRC_STORE_EOI*
 - made use of the new spapr_xive_get_eq() prototype
 - removed EQ_W0_UCOND_NOTIFY when the EQ is reseted
 - fixed XIVE_EQ_DEBUG support. Offset for the generation bit was wrong

 hw/intc/Makefile.objs       |   2 +-
 hw/intc/spapr_xive_hcall.c  | 859 ++++++++++++++++++++++++++++++++++++++++++++
 hw/ppc/spapr.c              |   2 +
 include/hw/ppc/spapr.h      |  15 +-
 include/hw/ppc/spapr_xive.h |   4 +
 5 files changed, 880 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 49e13e7aeeee..122e2ec77e8d 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..86dec6c02401
--- /dev/null
+++ b/hw/intc/spapr_xive_hcall.c
@@ -0,0 +1,859 @@
+/*
+ * QEMU PowerPC sPAPR XIVE interrupt controller model
+ *
+ * Copyright (c) 2017, 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 "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"
+
+/*
+ * OPAL uses the priority 7 queue to automatically escalate interrupts
+ * for all other queues (DD2.X POWER9). So only priorities [0..6] are
+ * allowed for the guest.
+ */
+static bool priority_is_valid(uint8_t priority)
+{
+    switch (priority) {
+    case 0 ... 6:
+        return true;
+    case 7: /* OPAL escalation queue */
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid priority %d requested\n",
+                      priority);
+        return false;
+    }
+}
+
+/*
+ * 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.
+ */
+
+#define XIVE_SRC_H_INT_ESB     PPC_BIT(60)
+#define XIVE_SRC_LSI           PPC_BIT(61)
+#define XIVE_SRC_TRIGGER       PPC_BIT(62)
+#define XIVE_SRC_STORE_EOI     PPC_BIT(63)
+
+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];
+    hwaddr mmio_base;
+
+    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, lisn);
+    if (!ive || !(ive->w & IVE_VALID)) {
+        return H_P2;
+    }
+
+    mmio_base = xive->esb_base + (1ull << ESB_SHIFT) * lisn;
+
+    /* All sources are emulated under the main XIVE object and share
+     * the same characteristics.
+     */
+    args[0] = XIVE_SRC_TRIGGER | XIVE_SRC_STORE_EOI;
+    if (spapr_xive_irq_is_lsi(xive, lisn)) {
+        args[0] |= XIVE_SRC_LSI;
+    }
+
+    /* Match XIVE_SRC_TRIGGER characteristic */
+    args[1] = mmio_base;
+    args[2] = -1; /* No specific trigger page */
+    args[3] = 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 PPC_BIT(62)
+#define XIVE_SRC_MASK     PPC_BIT(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;
+
+    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, lisn);
+    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;
+    }
+
+    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_get_eq(spapr->xive, target, priority)) {
+        return H_P3;
+    }
+
+    eq_idx = XIVE_EQ_INDEX(target, priority);
+
+    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;
+
+    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, lisn);
+    if (!ive || !(ive->w & IVE_VALID)) {
+        return H_P2;
+    }
+
+    eq_idx = GETFIELD(IVE_EQ_INDEX, ive->w);
+    eq = spapr_xive_get_eq(spapr->xive, XIVE_EQ_INDEX_SERVER(eq_idx),
+                           XIVE_EQ_INDEX_PRIO(eq_idx));
+    if (!eq) {
+        /* Not sure what to return here */
+        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];
+    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;
+    }
+
+    /* 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.
+     */
+    eq = spapr_xive_get_eq(spapr->xive, target, priority);
+    if (!eq)  {
+        return H_P2;
+    }
+
+    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 PPC_BIT(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];
+    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;
+    }
+
+    /* 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.
+     */
+    old_eq = spapr_xive_get_eq(spapr->xive, target, priority);
+    if (!old_eq)  {
+        return H_P2;
+    }
+
+    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, "XIVE: invalid EQ size %"PRIx64"\n",
+                      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, "XIVE: failed to read EQ data @0x%"
+                          HWADDR_PRIx "\n", 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;
+    } else {
+        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 0-61: Reserved
+ *       Bit 62: The value of Event Queue Generation Number (g) per
+ *              the XIVE spec if "Debug" = 1
+ *       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     PPC_BIT(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];
+    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;
+    }
+
+    /* 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.
+     */
+    eq = spapr_xive_get_eq(spapr->xive, target, priority);
+    if (!eq)  {
+        return H_P2;
+    }
+
+    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] |= (uint64_t)GETFIELD(EQ_W1_GENERATION, eq->w1) << 62;
+
+        /* Load R7 with the event queue offset counter */
+        args[3] = GETFIELD(EQ_W1_PAGE_OFF, eq->w1);
+    } else {
+        args[3] = 0;
+    }
+
+    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 PPC_BIT(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];
+    hwaddr esb_base;
+
+    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, lisn);
+    if (!ive || !(ive->w & IVE_VALID)) {
+        return H_P2;
+    }
+
+    if (offset > (1ull << ESB_SHIFT)) {
+        return H_P3;
+    }
+
+    esb_base = xive->esb_base + (1ull << ESB_SHIFT) * lisn;
+    esb_base += offset;
+
+    if (dma_memory_rw(&address_space_memory, esb_base, &data, 8,
+                      (flags & XIVE_ESB_STORE))) {
+        qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to access ESB @0x%"
+                      HWADDR_PRIx "\n", 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];
+
+    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, lisn);
+    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;
+    }
+
+    device_reset(DEVICE(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 195a48399e4b..1a71bf613b9e 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -222,6 +222,8 @@ static sPAPRXive *spapr_xive_create(sPAPRMachineState 
*spapr, int nr_irqs,
         goto error;
     }
 
+    spapr_xive_hcall_init(spapr);
+
     qdev_set_parent_bus(DEVICE(obj), sysbus_get_default());
     return SPAPR_XIVE(obj);
 error:
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index addc31dba497..ad923e668946 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -388,7 +388,20 @@ 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 dcaa69025878..0385df69b028 100644
--- a/include/hw/ppc/spapr_xive.h
+++ b/include/hw/ppc/spapr_xive.h
@@ -60,4 +60,8 @@ bool spapr_xive_irq_disable(sPAPRXive *xive, uint32_t lisn);
 void spapr_xive_pic_print_info(sPAPRXive *xive, Monitor *mon);
 void spapr_xive_nvt_pic_print_info(sPAPRXiveNVT *nvt, Monitor *mon);
 
+typedef struct sPAPRMachineState sPAPRMachineState;
+
+void spapr_xive_hcall_init(sPAPRMachineState *spapr);
+
 #endif /* PPC_SPAPR_XIVE_H */
-- 
2.13.6