Commit 23bcd5eb authored by Cédric Le Goater's avatar Cédric Le Goater Committed by David Gibson
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spapr: add hcalls support for the XIVE exploitation interrupt mode 



The different XIVE virtualization structures (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 (ESB) 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.

Signed-off-by: default avatarCédric Le Goater <clg@kaod.org>
Reviewed-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
[dwg: Folded in fix for field accessors]
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent dcc345b6

hw/intc/spapr_xive.c

+982 −0

File changed.

Preview size limit exceeded, changes collapsed.

hw/ppc/spapr_irq.c

+2 −0
Original line number Diff line number Diff line
@@ -239,6 +239,8 @@ static void spapr_irq_init_xive(sPAPRMachineState *spapr, Error **errp) 
    for (i = 0; i < nr_servers; ++i) {

        spapr_xive_irq_claim(spapr->xive, SPAPR_IRQ_IPI + i, false);

    }



    spapr_xive_hcall_init(spapr);

}



static int spapr_irq_claim_xive(sPAPRMachineState *spapr, int irq, bool lsi,

include/hw/ppc/spapr.h

+14 −1
Original line number Diff line number Diff line
@@ -452,7 +452,20 @@ 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.

include/hw/ppc/spapr_xive.h

+4 −0
Original line number Diff line number Diff line
@@ -42,4 +42,8 @@ bool spapr_xive_irq_free(sPAPRXive *xive, uint32_t lisn); 
void spapr_xive_pic_print_info(sPAPRXive *xive, Monitor *mon);

qemu_irq spapr_xive_qirq(sPAPRXive *xive, uint32_t lisn);



typedef struct sPAPRMachineState sPAPRMachineState;



void spapr_xive_hcall_init(sPAPRMachineState *spapr);



#endif /* PPC_SPAPR_XIVE_H */