Commit f4b9523b authored by Alexey Kardashevskiy's avatar Alexey Kardashevskiy Committed by Alexander Graf
Browse files

pseries: added allocator for a block of IRQs 



The patch adds a simple helper which allocates a consecutive sequence
of IRQs calling spapr_allocate_irq for each and checks that allocated
IRQs go consequently.

The patch is required for upcoming support of MSI/MSIX on POWER.

Signed-off-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent fa28f71b

hw/spapr.c

+26 −0
Original line number Diff line number Diff line
@@ -105,6 +105,32 @@ int spapr_allocate_irq(int hint, enum xics_irq_type type) 
    return irq;

}



/* Allocate block of consequtive IRQs, returns a number of the first */

int spapr_allocate_irq_block(int num, enum xics_irq_type type)

{

    int first = -1;

    int i;



    for (i = 0; i < num; ++i) {

        int irq;



        irq = spapr_allocate_irq(0, type);

        if (!irq) {

            return -1;

        }



        if (0 == i) {

            first = irq;

        }



        /* If the above doesn't create a consecutive block then that's

         * an internal bug */

        assert(irq == (first + i));

    }



    return first;

}



static int spapr_set_associativity(void *fdt, sPAPREnvironment *spapr)

{

    int ret = 0, offset;

hw/spapr.h

+1 −0
Original line number Diff line number Diff line
@@ -290,6 +290,7 @@ target_ulong spapr_hypercall(CPUPPCState *env, target_ulong opcode, 
                             target_ulong *args);



int spapr_allocate_irq(int hint, enum xics_irq_type type);

int spapr_allocate_irq_block(int num, enum xics_irq_type type);



static inline int spapr_allocate_msi(int hint)

{