Commit 42561bf2 authored by Anton Blanchard's avatar Anton Blanchard Committed by Alexander Graf
Browse files

pseries: Add H_SET_MODE hcall to change guest exception endianness 



H_SET_MODE is used for controlling various partition settings. One
of these settings is the endianness a guest takes its exceptions in.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
[agraf: fix whitespace]
Signed-off-by: default avatarAlexander Graf <agraf@suse.de>
parent 33a0e5d8

hw/ppc/spapr.c

+1 −1
Original line number Diff line number Diff line
@@ -282,7 +282,7 @@ static void *spapr_create_fdt_skel(const char *cpu_model, 
    uint32_t start_prop = cpu_to_be32(initrd_base);

    uint32_t end_prop = cpu_to_be32(initrd_base + initrd_size);

    char hypertas_prop[] = "hcall-pft\0hcall-term\0hcall-dabr\0hcall-interrupt"

        "\0hcall-tce\0hcall-vio\0hcall-splpar\0hcall-bulk";

        "\0hcall-tce\0hcall-vio\0hcall-splpar\0hcall-bulk\0hcall-set-mode";

    char qemu_hypertas_prop[] = "hcall-memop1";

    uint32_t refpoints[] = {cpu_to_be32(0x4), cpu_to_be32(0x4)};

    uint32_t interrupt_server_ranges_prop[] = {0, cpu_to_be32(smp_cpus)};

hw/ppc/spapr_hcall.c

+50 −0
Original line number Diff line number Diff line
@@ -657,6 +657,54 @@ static target_ulong h_logical_dcbf(PowerPCCPU *cpu, sPAPREnvironment *spapr, 
    return H_SUCCESS;

}



static target_ulong h_set_mode(PowerPCCPU *cpu, sPAPREnvironment *spapr,

                               target_ulong opcode, target_ulong *args)

{

    CPUState *cs;

    target_ulong mflags = args[0];

    target_ulong resource = args[1];

    target_ulong value1 = args[2];

    target_ulong value2 = args[3];

    target_ulong ret = H_P2;



    if (resource == H_SET_MODE_ENDIAN) {

        if (value1) {

            ret = H_P3;

            goto out;

        }

        if (value2) {

            ret = H_P4;

            goto out;

        }



        switch (mflags) {

        case H_SET_MODE_ENDIAN_BIG:

            for (cs = first_cpu; cs != NULL; cs = cs->next_cpu) {

                PowerPCCPU *cp = POWERPC_CPU(cs);

                CPUPPCState *env = &cp->env;

                env->spr[SPR_LPCR] &= ~LPCR_ILE;

            }

            ret = H_SUCCESS;

            break;



        case H_SET_MODE_ENDIAN_LITTLE:

            for (cs = first_cpu; cs != NULL; cs = cs->next_cpu) {

                PowerPCCPU *cp = POWERPC_CPU(cs);

                CPUPPCState *env = &cp->env;

                env->spr[SPR_LPCR] |= LPCR_ILE;

            }

            ret = H_SUCCESS;

            break;



        default:

            ret = H_UNSUPPORTED_FLAG;

        }

    }



out:

    return ret;

}



static spapr_hcall_fn papr_hypercall_table[(MAX_HCALL_OPCODE / 4) + 1];

static spapr_hcall_fn kvmppc_hypercall_table[KVMPPC_HCALL_MAX - KVMPPC_HCALL_BASE + 1];
@@ -734,6 +782,8 @@ static void hypercall_register_types(void) 


    /* qemu/KVM-PPC specific hcalls */

    spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas);



    spapr_register_hypercall(H_SET_MODE, h_set_mode);

}



type_init(hypercall_register_types)

include/hw/ppc/spapr.h

+16 −1
Original line number Diff line number Diff line
@@ -111,6 +111,15 @@ typedef struct sPAPREnvironment { 
#define H_NOT_ENOUGH_RESOURCES -44

#define H_R_STATE         -45

#define H_RESCINDEND      -46

#define H_P2              -55

#define H_P3              -56

#define H_P4              -57

#define H_P5              -58

#define H_P6              -59

#define H_P7              -60

#define H_P8              -61

#define H_P9              -62

#define H_UNSUPPORTED_FLAG -256

#define H_MULTI_THREADS_ACTIVE -9005
@@ -145,6 +154,11 @@ typedef struct sPAPREnvironment { 
#define H_PP1             (1ULL<<(63-62))

#define H_PP2             (1ULL<<(63-63))



/* H_SET_MODE flags */

#define H_SET_MODE_ENDIAN        4

#define H_SET_MODE_ENDIAN_BIG    0

#define H_SET_MODE_ENDIAN_LITTLE 1



/* VASI States */

#define H_VASI_INVALID    0

#define H_VASI_ENABLED    1
@@ -269,7 +283,8 @@ typedef struct sPAPREnvironment { 
#define H_GET_EM_PARMS          0x2B8

#define H_SET_MPP               0x2D0

#define H_GET_MPP               0x2D4

#define MAX_HCALL_OPCODE        H_GET_MPP

#define H_SET_MODE              0x31C

#define MAX_HCALL_OPCODE        H_SET_MODE



/* The hcalls above are standardized in PAPR and implemented by pHyp

 * as well.