[mirror_qemu.git] / hw / intc / xics_kvm.c

/*
 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
 *
 * PAPR Virtualized Interrupt System, aka ICS/ICP aka xics, in-kernel emulation
 *
 * Copyright (c) 2013 David Gibson, IBM Corporation.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 */

#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu-common.h"
#include "cpu.h"
#include "hw/hw.h"
#include "trace.h"
#include "sysemu/kvm.h"
#include "hw/ppc/spapr.h"
#include "hw/ppc/xics.h"
#include "hw/ppc/xics_spapr.h"
#include "kvm_ppc.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"

#include <sys/ioctl.h>

static int kernel_xics_fd = -1;

typedef struct KVMEnabledICP {
    unsigned long vcpu_id;
    QLIST_ENTRY(KVMEnabledICP) node;
} KVMEnabledICP;

static QLIST_HEAD(, KVMEnabledICP)
    kvm_enabled_icps = QLIST_HEAD_INITIALIZER(&kvm_enabled_icps);

/*
 * ICP-KVM
 */
void icp_get_kvm_state(ICPState *icp)
{
    uint64_t state;
    int ret;

    /* ICP for this CPU thread is not in use, exiting */
    if (!icp->cs) {
        return;
    }

    ret = kvm_get_one_reg(icp->cs, KVM_REG_PPC_ICP_STATE, &state);
    if (ret != 0) {
        error_report("Unable to retrieve KVM interrupt controller state"
                " for CPU %ld: %s", kvm_arch_vcpu_id(icp->cs), strerror(errno));
        exit(1);
    }

    icp->xirr = state >> KVM_REG_PPC_ICP_XISR_SHIFT;
    icp->mfrr = (state >> KVM_REG_PPC_ICP_MFRR_SHIFT)
        & KVM_REG_PPC_ICP_MFRR_MASK;
    icp->pending_priority = (state >> KVM_REG_PPC_ICP_PPRI_SHIFT)
        & KVM_REG_PPC_ICP_PPRI_MASK;
}

static void do_icp_synchronize_state(CPUState *cpu, run_on_cpu_data arg)
{
    icp_get_kvm_state(arg.host_ptr);
}

void icp_synchronize_state(ICPState *icp)
{
    if (icp->cs) {
        run_on_cpu(icp->cs, do_icp_synchronize_state, RUN_ON_CPU_HOST_PTR(icp));
    }
}

int icp_set_kvm_state(ICPState *icp)
{
    uint64_t state;
    int ret;

    /* ICP for this CPU thread is not in use, exiting */
    if (!icp->cs) {
        return 0;
    }

    state = ((uint64_t)icp->xirr << KVM_REG_PPC_ICP_XISR_SHIFT)
        | ((uint64_t)icp->mfrr << KVM_REG_PPC_ICP_MFRR_SHIFT)
        | ((uint64_t)icp->pending_priority << KVM_REG_PPC_ICP_PPRI_SHIFT);

    ret = kvm_set_one_reg(icp->cs, KVM_REG_PPC_ICP_STATE, &state);
    if (ret != 0) {
        error_report("Unable to restore KVM interrupt controller state (0x%"
                PRIx64 ") for CPU %ld: %s", state, kvm_arch_vcpu_id(icp->cs),
                strerror(errno));
        return ret;
    }

    return 0;
}

void icp_kvm_realize(DeviceState *dev, Error **errp)
{
    ICPState *icp = ICP(dev);
    CPUState *cs;
    KVMEnabledICP *enabled_icp;
    unsigned long vcpu_id;
    int ret;

    if (kernel_xics_fd == -1) {
        abort();
    }

    cs = icp->cs;
    vcpu_id = kvm_arch_vcpu_id(cs);

    /*
     * If we are reusing a parked vCPU fd corresponding to the CPU
     * which was hot-removed earlier we don't have to renable
     * KVM_CAP_IRQ_XICS capability again.
     */
    QLIST_FOREACH(enabled_icp, &kvm_enabled_icps, node) {
        if (enabled_icp->vcpu_id == vcpu_id) {
            return;
        }
    }

    ret = kvm_vcpu_enable_cap(cs, KVM_CAP_IRQ_XICS, 0, kernel_xics_fd, vcpu_id);
    if (ret < 0) {
        error_setg(errp, "Unable to connect CPU%ld to kernel XICS: %s", vcpu_id,
                   strerror(errno));
        return;
    }
    enabled_icp = g_malloc(sizeof(*enabled_icp));
    enabled_icp->vcpu_id = vcpu_id;
    QLIST_INSERT_HEAD(&kvm_enabled_icps, enabled_icp, node);
}

/*
 * ICS-KVM
 */
void ics_get_kvm_state(ICSState *ics)
{
    uint64_t state;
    int i;

    for (i = 0; i < ics->nr_irqs; i++) {
        ICSIRQState *irq = &ics->irqs[i];

        kvm_device_access(kernel_xics_fd, KVM_DEV_XICS_GRP_SOURCES,
                          i + ics->offset, &state, false, &error_fatal);

        irq->server = state & KVM_XICS_DESTINATION_MASK;
        irq->saved_priority = (state >> KVM_XICS_PRIORITY_SHIFT)
            & KVM_XICS_PRIORITY_MASK;
        /*
         * To be consistent with the software emulation in xics.c, we
         * split out the masked state + priority that we get from the
         * kernel into 'current priority' (0xff if masked) and
         * 'saved priority' (if masked, this is the priority the
         * interrupt had before it was masked).  Masking and unmasking
         * are done with the ibm,int-off and ibm,int-on RTAS calls.
         */
        if (state & KVM_XICS_MASKED) {
            irq->priority = 0xff;
        } else {
            irq->priority = irq->saved_priority;
        }

        irq->status = 0;
        if (state & KVM_XICS_PENDING) {
            if (state & KVM_XICS_LEVEL_SENSITIVE) {
                irq->status |= XICS_STATUS_ASSERTED;
            } else {
                /*
                 * A pending edge-triggered interrupt (or MSI)
                 * must have been rejected previously when we
                 * first detected it and tried to deliver it,
                 * so mark it as pending and previously rejected
                 * for consistency with how xics.c works.
                 */
                irq->status |= XICS_STATUS_MASKED_PENDING
                    | XICS_STATUS_REJECTED;
            }
        }
        if (state & KVM_XICS_PRESENTED) {
                irq->status |= XICS_STATUS_PRESENTED;
        }
        if (state & KVM_XICS_QUEUED) {
                irq->status |= XICS_STATUS_QUEUED;
        }
    }
}

void ics_synchronize_state(ICSState *ics)
{
    ics_get_kvm_state(ics);
}

int ics_set_kvm_state_one(ICSState *ics, int srcno)
{
    uint64_t state;
    Error *local_err = NULL;
    ICSIRQState *irq = &ics->irqs[srcno];
    int ret;

    state = irq->server;
    state |= (uint64_t)(irq->saved_priority & KVM_XICS_PRIORITY_MASK)
        << KVM_XICS_PRIORITY_SHIFT;
    if (irq->priority != irq->saved_priority) {
        assert(irq->priority == 0xff);
        state |= KVM_XICS_MASKED;
    }

    if (irq->flags & XICS_FLAGS_IRQ_LSI) {
        state |= KVM_XICS_LEVEL_SENSITIVE;
        if (irq->status & XICS_STATUS_ASSERTED) {
            state |= KVM_XICS_PENDING;
        }
    } else {
        if (irq->status & XICS_STATUS_MASKED_PENDING) {
            state |= KVM_XICS_PENDING;
        }
    }
    if (irq->status & XICS_STATUS_PRESENTED) {
        state |= KVM_XICS_PRESENTED;
    }
    if (irq->status & XICS_STATUS_QUEUED) {
        state |= KVM_XICS_QUEUED;
    }

    ret = kvm_device_access(kernel_xics_fd, KVM_DEV_XICS_GRP_SOURCES,
                            srcno + ics->offset, &state, true, &local_err);
    if (local_err) {
        error_report_err(local_err);
        return ret;
    }

    return 0;
}

int ics_set_kvm_state(ICSState *ics)
{
    int i;

    for (i = 0; i < ics->nr_irqs; i++) {
        int ret;

        ret = ics_set_kvm_state_one(ics, i);
        if (ret) {
            return ret;
        }
    }

    return 0;
}

void ics_kvm_set_irq(ICSState *ics, int srcno, int val)
{
    struct kvm_irq_level args;
    int rc;

    args.irq = srcno + ics->offset;
    if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_MSI) {
        if (!val) {
            return;
        }
        args.level = KVM_INTERRUPT_SET;
    } else {
        args.level = val ? KVM_INTERRUPT_SET_LEVEL : KVM_INTERRUPT_UNSET;
    }
    rc = kvm_vm_ioctl(kvm_state, KVM_IRQ_LINE, &args);
    if (rc < 0) {
        perror("kvm_irq_line");
    }
}

static void rtas_dummy(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                       uint32_t token,
                       uint32_t nargs, target_ulong args,
                       uint32_t nret, target_ulong rets)
{
    error_report("pseries: %s must never be called for in-kernel XICS",
                 __func__);
}

int xics_kvm_init(sPAPRMachineState *spapr, Error **errp)
{
    int rc;

    if (!kvm_enabled() || !kvm_check_extension(kvm_state, KVM_CAP_IRQ_XICS)) {
        error_setg(errp,
                   "KVM and IRQ_XICS capability must be present for in-kernel XICS");
        goto fail;
    }

    spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_dummy);
    spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_dummy);
    spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_dummy);
    spapr_rtas_register(RTAS_IBM_INT_ON, "ibm,int-on", rtas_dummy);

    rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_SET_XIVE, "ibm,set-xive");
    if (rc < 0) {
        error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,set-xive");
        goto fail;
    }

    rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_GET_XIVE, "ibm,get-xive");
    if (rc < 0) {
        error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,get-xive");
        goto fail;
    }

    rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_INT_ON, "ibm,int-on");
    if (rc < 0) {
        error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,int-on");
        goto fail;
    }

    rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_INT_OFF, "ibm,int-off");
    if (rc < 0) {
        error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,int-off");
        goto fail;
    }

    /* Create the KVM XICS device */
    rc = kvm_create_device(kvm_state, KVM_DEV_TYPE_XICS, false);
    if (rc < 0) {
        error_setg_errno(errp, -rc, "Error on KVM_CREATE_DEVICE for XICS");
        goto fail;
    }

    kernel_xics_fd = rc;
    kvm_kernel_irqchip = true;
    kvm_msi_via_irqfd_allowed = true;
    kvm_gsi_direct_mapping = true;

    return 0;

fail:
    kvmppc_define_rtas_kernel_token(0, "ibm,set-xive");
    kvmppc_define_rtas_kernel_token(0, "ibm,get-xive");
    kvmppc_define_rtas_kernel_token(0, "ibm,int-on");
    kvmppc_define_rtas_kernel_token(0, "ibm,int-off");
    return -1;
}
Commit	Line	Data
11ad93f6 DG	1	/*
	2	* QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
	3	*
	4	* PAPR Virtualized Interrupt System, aka ICS/ICP aka xics, in-kernel emulation
	5	*
	6	* Copyright (c) 2013 David Gibson, IBM Corporation.
	7	*
	8	* Permission is hereby granted, free of charge, to any person obtaining a copy
	9	* of this software and associated documentation files (the "Software"), to deal
	10	* in the Software without restriction, including without limitation the rights
	11	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	12	* copies of the Software, and to permit persons to whom the Software is
	13	* furnished to do so, subject to the following conditions:
	14	*
	15	* The above copyright notice and this permission notice shall be included in
	16	* all copies or substantial portions of the Software.
	17	*
	18	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	19	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	20	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	21	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	22	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	23	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	24	* THE SOFTWARE.
	25	*
	26	*/
	27
0d75590d	28	#include "qemu/osdep.h"
da34e65c	29	#include "qapi/error.h"
4771d756 PB	30	#include "qemu-common.h"
4771d756 PB	31	#include "cpu.h"
11ad93f6 DG	32	#include "hw/hw.h"
11ad93f6 DG	33	#include "trace.h"
77ac58dd	34	#include "sysemu/kvm.h"
11ad93f6 DG	35	#include "hw/ppc/spapr.h"
11ad93f6 DG	36	#include "hw/ppc/xics.h"
a51d5afc	37	#include "hw/ppc/xics_spapr.h"
11ad93f6 DG	38	#include "kvm_ppc.h"
	39	#include "qemu/config-file.h"
	40	#include "qemu/error-report.h"
	41
	42	#include <sys/ioctl.h>
	43
729f8a4f CLG	44	static int kernel_xics_fd = -1;
729f8a4f CLG	45
de86eccc GK	46	typedef struct KVMEnabledICP {
	47	unsigned long vcpu_id;
	48	QLIST_ENTRY(KVMEnabledICP) node;
	49	} KVMEnabledICP;
	50
	51	static QLIST_HEAD(, KVMEnabledICP)
	52	kvm_enabled_icps = QLIST_HEAD_INITIALIZER(&kvm_enabled_icps);
	53
11ad93f6 DG	54	/*
	55	* ICP-KVM
	56	*/
0e5c7fad	57	void icp_get_kvm_state(ICPState *icp)
11ad93f6 DG	58	{
11ad93f6 DG	59	uint64_t state;
11ad93f6 DG	60	int ret;
	61
	62	/* ICP for this CPU thread is not in use, exiting */
8e4fba20	63	if (!icp->cs) {
11ad93f6 DG	64	return;
	65	}
	66
bf358b54	67	ret = kvm_get_one_reg(icp->cs, KVM_REG_PPC_ICP_STATE, &state);
11ad93f6 DG	68	if (ret != 0) {
11ad93f6 DG	69	error_report("Unable to retrieve KVM interrupt controller state"
8e4fba20	70	" for CPU %ld: %s", kvm_arch_vcpu_id(icp->cs), strerror(errno));
11ad93f6 DG	71	exit(1);
	72	}
	73
8e4fba20 CLG	74	icp->xirr = state >> KVM_REG_PPC_ICP_XISR_SHIFT;
8e4fba20 CLG	75	icp->mfrr = (state >> KVM_REG_PPC_ICP_MFRR_SHIFT)
11ad93f6	76	& KVM_REG_PPC_ICP_MFRR_MASK;
8e4fba20	77	icp->pending_priority = (state >> KVM_REG_PPC_ICP_PPRI_SHIFT)
11ad93f6 DG	78	& KVM_REG_PPC_ICP_PPRI_MASK;
	79	}
	80
dcb556fc GK	81	static void do_icp_synchronize_state(CPUState *cpu, run_on_cpu_data arg)
	82	{
	83	icp_get_kvm_state(arg.host_ptr);
	84	}
	85
0e5c7fad	86	void icp_synchronize_state(ICPState *icp)
dcb556fc GK	87	{
	88	if (icp->cs) {
	89	run_on_cpu(icp->cs, do_icp_synchronize_state, RUN_ON_CPU_HOST_PTR(icp));
	90	}
	91	}
	92
0e5c7fad	93	int icp_set_kvm_state(ICPState *icp)
11ad93f6 DG	94	{
11ad93f6 DG	95	uint64_t state;
11ad93f6 DG	96	int ret;
	97
	98	/* ICP for this CPU thread is not in use, exiting */
8e4fba20	99	if (!icp->cs) {
11ad93f6 DG	100	return 0;
	101	}
	102
8e4fba20 CLG	103	state = ((uint64_t)icp->xirr << KVM_REG_PPC_ICP_XISR_SHIFT)
	104	\| ((uint64_t)icp->mfrr << KVM_REG_PPC_ICP_MFRR_SHIFT)
	105	\| ((uint64_t)icp->pending_priority << KVM_REG_PPC_ICP_PPRI_SHIFT);
11ad93f6	106
bf358b54	107	ret = kvm_set_one_reg(icp->cs, KVM_REG_PPC_ICP_STATE, &state);
11ad93f6 DG	108	if (ret != 0) {
11ad93f6 DG	109	error_report("Unable to restore KVM interrupt controller state (0x%"
8e4fba20	110	PRIx64 ") for CPU %ld: %s", state, kvm_arch_vcpu_id(icp->cs),
11ad93f6 DG	111	strerror(errno));
	112	return ret;
	113	}
	114
	115	return 0;
	116	}
	117
8e6e6efe	118	void icp_kvm_realize(DeviceState dev, Error *errp)
f0232434	119	{
a028dd42	120	ICPState *icp = ICP(dev);
a028dd42	121	CPUState *cs;
de86eccc	122	KVMEnabledICP *enabled_icp;
a028dd42	123	unsigned long vcpu_id;
f0232434 CLG	124	int ret;
	125
	126	if (kernel_xics_fd == -1) {
	127	abort();
	128	}
	129
a028dd42 CLG	130	cs = icp->cs;
	131	vcpu_id = kvm_arch_vcpu_id(cs);
	132
f0232434 CLG	133	/*
	134	* If we are reusing a parked vCPU fd corresponding to the CPU
	135	* which was hot-removed earlier we don't have to renable
	136	* KVM_CAP_IRQ_XICS capability again.
	137	*/
de86eccc GK	138	QLIST_FOREACH(enabled_icp, &kvm_enabled_icps, node) {
	139	if (enabled_icp->vcpu_id == vcpu_id) {
	140	return;
	141	}
f0232434 CLG	142	}
f0232434 CLG	143
de86eccc	144	ret = kvm_vcpu_enable_cap(cs, KVM_CAP_IRQ_XICS, 0, kernel_xics_fd, vcpu_id);
f0232434	145	if (ret < 0) {
b1fd36c3 GK	146	error_setg(errp, "Unable to connect CPU%ld to kernel XICS: %s", vcpu_id,
	147	strerror(errno));
	148	return;
f0232434	149	}
de86eccc GK	150	enabled_icp = g_malloc(sizeof(*enabled_icp));
	151	enabled_icp->vcpu_id = vcpu_id;
	152	QLIST_INSERT_HEAD(&kvm_enabled_icps, enabled_icp, node);
f0232434 CLG	153	}
f0232434 CLG	154
11ad93f6 DG	155	/*
	156	* ICS-KVM
	157	*/
d80b2ccf	158	void ics_get_kvm_state(ICSState *ics)
11ad93f6	159	{
11ad93f6	160	uint64_t state;
11ad93f6 DG	161	int i;
	162
	163	for (i = 0; i < ics->nr_irqs; i++) {
	164	ICSIRQState *irq = &ics->irqs[i];
11ad93f6	165
bf358b54	166	kvm_device_access(kernel_xics_fd, KVM_DEV_XICS_GRP_SOURCES,
50beeb68	167	i + ics->offset, &state, false, &error_fatal);
11ad93f6 DG	168
	169	irq->server = state & KVM_XICS_DESTINATION_MASK;
	170	irq->saved_priority = (state >> KVM_XICS_PRIORITY_SHIFT)
	171	& KVM_XICS_PRIORITY_MASK;
	172	/*
	173	* To be consistent with the software emulation in xics.c, we
	174	* split out the masked state + priority that we get from the
	175	* kernel into 'current priority' (0xff if masked) and
	176	* 'saved priority' (if masked, this is the priority the
	177	* interrupt had before it was masked). Masking and unmasking
	178	* are done with the ibm,int-off and ibm,int-on RTAS calls.
	179	*/
	180	if (state & KVM_XICS_MASKED) {
	181	irq->priority = 0xff;
	182	} else {
	183	irq->priority = irq->saved_priority;
	184	}
	185
063cb7cb	186	irq->status = 0;
11ad93f6 DG	187	if (state & KVM_XICS_PENDING) {
	188	if (state & KVM_XICS_LEVEL_SENSITIVE) {
	189	irq->status \|= XICS_STATUS_ASSERTED;
	190	} else {
	191	/*
	192	* A pending edge-triggered interrupt (or MSI)
	193	* must have been rejected previously when we
	194	* first detected it and tried to deliver it,
	195	* so mark it as pending and previously rejected
	196	* for consistency with how xics.c works.
	197	*/
	198	irq->status \|= XICS_STATUS_MASKED_PENDING
	199	\| XICS_STATUS_REJECTED;
	200	}
	201	}
229e16fd SB	202	if (state & KVM_XICS_PRESENTED) {
	203	irq->status \|= XICS_STATUS_PRESENTED;
	204	}
	205	if (state & KVM_XICS_QUEUED) {
	206	irq->status \|= XICS_STATUS_QUEUED;
	207	}
11ad93f6 DG	208	}
	209	}
	210
d80b2ccf	211	void ics_synchronize_state(ICSState *ics)
dcb556fc GK	212	{
	213	ics_get_kvm_state(ics);
	214	}
	215
6cead90c	216	int ics_set_kvm_state_one(ICSState *ics, int srcno)
11ad93f6	217	{
11ad93f6	218	uint64_t state;
bf358b54	219	Error *local_err = NULL;
6cead90c GK	220	ICSIRQState *irq = &ics->irqs[srcno];
6cead90c GK	221	int ret;
11ad93f6	222
6cead90c GK	223	state = irq->server;
	224	state \|= (uint64_t)(irq->saved_priority & KVM_XICS_PRIORITY_MASK)
	225	<< KVM_XICS_PRIORITY_SHIFT;
	226	if (irq->priority != irq->saved_priority) {
	227	assert(irq->priority == 0xff);
	228	state \|= KVM_XICS_MASKED;
	229	}
11ad93f6	230
6cead90c GK	231	if (irq->flags & XICS_FLAGS_IRQ_LSI) {
	232	state \|= KVM_XICS_LEVEL_SENSITIVE;
	233	if (irq->status & XICS_STATUS_ASSERTED) {
	234	state \|= KVM_XICS_PENDING;
11ad93f6	235	}
6cead90c GK	236	} else {
	237	if (irq->status & XICS_STATUS_MASKED_PENDING) {
	238	state \|= KVM_XICS_PENDING;
229e16fd	239	}
6cead90c GK	240	}
	241	if (irq->status & XICS_STATUS_PRESENTED) {
	242	state \|= KVM_XICS_PRESENTED;
	243	}
	244	if (irq->status & XICS_STATUS_QUEUED) {
	245	state \|= KVM_XICS_QUEUED;
	246	}
	247
	248	ret = kvm_device_access(kernel_xics_fd, KVM_DEV_XICS_GRP_SOURCES,
	249	srcno + ics->offset, &state, true, &local_err);
	250	if (local_err) {
	251	error_report_err(local_err);
	252	return ret;
	253	}
	254
	255	return 0;
	256	}
	257
	258	int ics_set_kvm_state(ICSState *ics)
	259	{
	260	int i;
	261
	262	for (i = 0; i < ics->nr_irqs; i++) {
	263	int ret;
11ad93f6	264
6cead90c GK	265	ret = ics_set_kvm_state_one(ics, i);
6cead90c GK	266	if (ret) {
11ad93f6 DG	267	return ret;
	268	}
	269	}
	270
	271	return 0;
	272	}
	273
557b4567	274	void ics_kvm_set_irq(ICSState *ics, int srcno, int val)
11ad93f6	275	{
11ad93f6 DG	276	struct kvm_irq_level args;
	277	int rc;
	278
	279	args.irq = srcno + ics->offset;
4af88944	280	if (ics->irqs[srcno].flags & XICS_FLAGS_IRQ_MSI) {
11ad93f6 DG	281	if (!val) {
	282	return;
	283	}
	284	args.level = KVM_INTERRUPT_SET;
	285	} else {
	286	args.level = val ? KVM_INTERRUPT_SET_LEVEL : KVM_INTERRUPT_UNSET;
	287	}
	288	rc = kvm_vm_ioctl(kvm_state, KVM_IRQ_LINE, &args);
	289	if (rc < 0) {
	290	perror("kvm_irq_line");
	291	}
	292	}
	293
28e02042	294	static void rtas_dummy(PowerPCCPU cpu, sPAPRMachineState spapr,
11ad93f6 DG	295	uint32_t token,
	296	uint32_t nargs, target_ulong args,
	297	uint32_t nret, target_ulong rets)
	298	{
	299	error_report("pseries: %s must never be called for in-kernel XICS",
	300	__func__);
	301	}
	302
2192a930	303	int xics_kvm_init(sPAPRMachineState spapr, Error *errp)
11ad93f6	304	{
817bb6a4	305	int rc;
11ad93f6 DG	306
	307	if (!kvm_enabled() \|\| !kvm_check_extension(kvm_state, KVM_CAP_IRQ_XICS)) {
	308	error_setg(errp,
	309	"KVM and IRQ_XICS capability must be present for in-kernel XICS");
	310	goto fail;
	311	}
	312
3a3b8502 AK	313	spapr_rtas_register(RTAS_IBM_SET_XIVE, "ibm,set-xive", rtas_dummy);
	314	spapr_rtas_register(RTAS_IBM_GET_XIVE, "ibm,get-xive", rtas_dummy);
	315	spapr_rtas_register(RTAS_IBM_INT_OFF, "ibm,int-off", rtas_dummy);
	316	spapr_rtas_register(RTAS_IBM_INT_ON, "ibm,int-on", rtas_dummy);
11ad93f6	317
3a3b8502	318	rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_SET_XIVE, "ibm,set-xive");
11ad93f6 DG	319	if (rc < 0) {
	320	error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,set-xive");
	321	goto fail;
	322	}
	323
3a3b8502	324	rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_GET_XIVE, "ibm,get-xive");
11ad93f6 DG	325	if (rc < 0) {
	326	error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,get-xive");
	327	goto fail;
	328	}
	329
3a3b8502	330	rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_INT_ON, "ibm,int-on");
11ad93f6 DG	331	if (rc < 0) {
	332	error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,int-on");
	333	goto fail;
	334	}
	335
3a3b8502	336	rc = kvmppc_define_rtas_kernel_token(RTAS_IBM_INT_OFF, "ibm,int-off");
11ad93f6 DG	337	if (rc < 0) {
	338	error_setg(errp, "kvmppc_define_rtas_kernel_token: ibm,int-off");
	339	goto fail;
	340	}
	341
bf358b54 CLG	342	/* Create the KVM XICS device */
bf358b54 CLG	343	rc = kvm_create_device(kvm_state, KVM_DEV_TYPE_XICS, false);
11ad93f6 DG	344	if (rc < 0) {
	345	error_setg_errno(errp, -rc, "Error on KVM_CREATE_DEVICE for XICS");
	346	goto fail;
	347	}
	348
bf358b54	349	kernel_xics_fd = rc;
9554233c	350	kvm_kernel_irqchip = true;
9554233c AK	351	kvm_msi_via_irqfd_allowed = true;
	352	kvm_gsi_direct_mapping = true;
	353
bf358b54	354	return 0;
11ad93f6 DG	355
	356	fail:
	357	kvmppc_define_rtas_kernel_token(0, "ibm,set-xive");
	358	kvmppc_define_rtas_kernel_token(0, "ibm,get-xive");
	359	kvmppc_define_rtas_kernel_token(0, "ibm,int-on");
	360	kvmppc_define_rtas_kernel_token(0, "ibm,int-off");
2192a930	361	return -1;
11ad93f6	362	}