Commit cfc61ba6 authored by Alexey Kardashevskiy's avatar Alexey Kardashevskiy Committed by David Gibson
Browse files

target/ppc: Add Directed Privileged Door-bell Exception State (DPDES) SPR 



DPDES stores a status of a doorbell message and if it is lost in
migration, the destination CPU won't receive it. This does not hit us
much as IPIs complete too quick to catch a pending one and even if
we missed one, broadcasts happen often enough to wake that CPU.

This defines DPDES and registers with KVM for migration.

Signed-off-by: default avatarAlexey Kardashevskiy <aik@ozlabs.ru>
Message-Id: <20190816061733.53572-1-aik@ozlabs.ru>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent f55750e4

target/ppc/cpu.h

+1 −0
Original line number Diff line number Diff line
@@ -1466,6 +1466,7 @@ typedef PowerPCCPU ArchCPU; 
#define SPR_MPC_ICTRL         (0x09E)

#define SPR_MPC_BAR           (0x09F)

#define SPR_PSPB              (0x09F)

#define SPR_DPDES             (0x0B0)

#define SPR_DAWR              (0x0B4)

#define SPR_RPR               (0x0BA)

#define SPR_CIABR             (0x0BB)

target/ppc/translate_init.inc.c

+14 −0
Original line number Diff line number Diff line
@@ -8198,6 +8198,18 @@ static void gen_spr_power8_pspb(CPUPPCState *env) 
                     KVM_REG_PPC_PSPB, 0);

}



static void gen_spr_power8_dpdes(CPUPPCState *env)

{

#if !defined(CONFIG_USER_ONLY)

    /* Directed Privileged Door-bell Exception State, used for IPI */

    spr_register_kvm_hv(env, SPR_DPDES, "DPDES",

                        SPR_NOACCESS, SPR_NOACCESS,

                        &spr_read_generic, SPR_NOACCESS,

                        &spr_read_generic, &spr_write_generic,

                        KVM_REG_PPC_DPDES, 0x00000000);

#endif

}



static void gen_spr_power8_ic(CPUPPCState *env)

{

#if !defined(CONFIG_USER_ONLY)
@@ -8629,6 +8641,7 @@ static void init_proc_POWER8(CPUPPCState *env) 
    gen_spr_power8_pmu_user(env);

    gen_spr_power8_tm(env);

    gen_spr_power8_pspb(env);

    gen_spr_power8_dpdes(env);

    gen_spr_vtb(env);

    gen_spr_power8_ic(env);

    gen_spr_power8_book4(env);
@@ -8817,6 +8830,7 @@ static void init_proc_POWER9(CPUPPCState *env) 
    gen_spr_power8_pmu_user(env);

    gen_spr_power8_tm(env);

    gen_spr_power8_pspb(env);

    gen_spr_power8_dpdes(env);

    gen_spr_vtb(env);

    gen_spr_power8_ic(env);

    gen_spr_power8_book4(env);