diff options
| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2019-08-16 16:17:33 +1000 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2019-08-21 17:17:39 +1000 |
| commit | cfc61ba62f30753849fe2b78da8b6d0a0a639db2 (patch) | |
| tree | 86fefe9f46feabc0340ae719c74d90e6259bc60e /target/ppc | |
| parent | f55750e4e4fb35b6a12c81c485f16494e2c61ad2 (diff) | |
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: Alexey Kardashevskiy <aik@ozlabs.ru>
Message-Id: <20190816061733.53572-1-aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'target/ppc')
| -rw-r--r-- | target/ppc/cpu.h | 1 | ||||
| -rw-r--r-- | target/ppc/translate_init.inc.c | 14 |
2 files changed, 15 insertions, 0 deletions
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h index 50245a8c4d..4b35c8e4f4 100644 --- a/target/ppc/cpu.h +++ b/target/ppc/cpu.h @@ -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) diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c index c9fcd87095..7e41ae1456 100644 --- a/target/ppc/translate_init.inc.c +++ b/target/ppc/translate_init.inc.c @@ -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); |