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Re: [Qemu-ppc] [PATCHv2] target/ppc, spapr: Move VPA information to mach
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From: |
Greg Kurz |
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Subject: |
Re: [Qemu-ppc] [PATCHv2] target/ppc, spapr: Move VPA information to machine_data |
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Date: |
Fri, 15 Jun 2018 16:00:24 +0200 |
On Fri, 15 Jun 2018 22:29:28 +1000
David Gibson <address@hidden> wrote:
> CPUPPCState currently contains a number of fields containing the state of
> the VPA. The VPA is a PAPR specific concept covering several guest/host
> shared memory areas used to communicate some information with the
> hypervisor.
>
> As a PAPR concept this is really machine specific information, although it
> is per-cpu, so it doesn't really belong in the core CPU state structure.
>
> There's also other information that's per-cpu, but platform/machine
> specific. So create a (void *)machine_data in PowerPCCPU which can be
> used by the machine to locate per-cpu data. Intialization, lifetime and
> cleanup of machine_data is entirely up to the machine type.
>
> Signed-off-by: David Gibson <address@hidden>
> ---
Reviewed-by: Greg Kurz <address@hidden>
and
Tested-by: Greg Kurz <address@hidden>
(threads=4 with hotplug, both success and error paths)
And now I'll look into migrating this *new* state.
> hw/ppc/spapr_cpu_core.c | 13 ++++++
> hw/ppc/spapr_hcall.c | 77 ++++++++++++++++++---------------
> include/hw/ppc/spapr_cpu_core.h | 11 +++++
> target/ppc/cpu.h | 7 +--
> target/ppc/kvm.c | 39 +++++++++--------
> target/ppc/translate_init.inc.c | 8 ----
> 6 files changed, 88 insertions(+), 67 deletions(-)
>
> Changes in v2:
> * Move alloc/free of machine_data to spapr_{create,delete}_vcpu()
> instead of spapr_{,un}realize_vcpu() (fixing a possible leak in the
> process)
>
> diff --git a/hw/ppc/spapr_cpu_core.c b/hw/ppc/spapr_cpu_core.c
> index 4f0c168784..f416212ae0 100644
> --- a/hw/ppc/spapr_cpu_core.c
> +++ b/hw/ppc/spapr_cpu_core.c
> @@ -28,6 +28,7 @@ static void spapr_cpu_reset(void *opaque)
> CPUState *cs = CPU(cpu);
> CPUPPCState *env = &cpu->env;
> PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> target_ulong lpcr;
>
> cpu_reset(cs);
> @@ -69,6 +70,12 @@ static void spapr_cpu_reset(void *opaque)
>
> /* Set a full AMOR so guest can use the AMR as it sees fit */
> env->spr[SPR_AMOR] = 0xffffffffffffffffull;
> +
> + spapr_cpu->vpa_addr = 0;
> + spapr_cpu->slb_shadow_addr = 0;
> + spapr_cpu->slb_shadow_size = 0;
> + spapr_cpu->dtl_addr = 0;
> + spapr_cpu->dtl_size = 0;
> }
>
> void spapr_cpu_set_entry_state(PowerPCCPU *cpu, target_ulong nip,
> target_ulong r3)
> @@ -186,6 +193,8 @@ static PowerPCCPU *spapr_create_vcpu(sPAPRCPUCore *sc,
> int i, Error **errp)
> goto err;
> }
>
> + cpu->machine_data = g_new0(sPAPRCPUState, 1);
> +
> object_unref(obj);
> return cpu;
>
> @@ -197,6 +206,10 @@ err:
>
> static void spapr_delete_vcpu(PowerPCCPU *cpu)
> {
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> +
> + cpu->machine_data = NULL;
> + g_free(spapr_cpu);
> object_unparent(OBJECT(cpu));
> }
>
> diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
> index 8b9a4b577f..ae913d070f 100644
> --- a/hw/ppc/spapr_hcall.c
> +++ b/hw/ppc/spapr_hcall.c
> @@ -8,6 +8,7 @@
> #include "exec/exec-all.h"
> #include "helper_regs.h"
> #include "hw/ppc/spapr.h"
> +#include "hw/ppc/spapr_cpu_core.h"
> #include "mmu-hash64.h"
> #include "cpu-models.h"
> #include "trace.h"
> @@ -908,9 +909,11 @@ unmap_out:
> #define VPA_SHARED_PROC_OFFSET 0x9
> #define VPA_SHARED_PROC_VAL 0x2
>
> -static target_ulong register_vpa(CPUPPCState *env, target_ulong vpa)
> +static target_ulong register_vpa(PowerPCCPU *cpu, target_ulong vpa)
> {
> - CPUState *cs = CPU(ppc_env_get_cpu(env));
> + CPUState *cs = CPU(cpu);
> + CPUPPCState *env = &cpu->env;
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> uint16_t size;
> uint8_t tmp;
>
> @@ -935,32 +938,34 @@ static target_ulong register_vpa(CPUPPCState *env,
> target_ulong vpa)
> return H_PARAMETER;
> }
>
> - env->vpa_addr = vpa;
> + spapr_cpu->vpa_addr = vpa;
>
> - tmp = ldub_phys(cs->as, env->vpa_addr + VPA_SHARED_PROC_OFFSET);
> + tmp = ldub_phys(cs->as, spapr_cpu->vpa_addr + VPA_SHARED_PROC_OFFSET);
> tmp |= VPA_SHARED_PROC_VAL;
> - stb_phys(cs->as, env->vpa_addr + VPA_SHARED_PROC_OFFSET, tmp);
> + stb_phys(cs->as, spapr_cpu->vpa_addr + VPA_SHARED_PROC_OFFSET, tmp);
>
> return H_SUCCESS;
> }
>
> -static target_ulong deregister_vpa(CPUPPCState *env, target_ulong vpa)
> +static target_ulong deregister_vpa(PowerPCCPU *cpu, target_ulong vpa)
> {
> - if (env->slb_shadow_addr) {
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> +
> + if (spapr_cpu->slb_shadow_addr) {
> return H_RESOURCE;
> }
>
> - if (env->dtl_addr) {
> + if (spapr_cpu->dtl_addr) {
> return H_RESOURCE;
> }
>
> - env->vpa_addr = 0;
> + spapr_cpu->vpa_addr = 0;
> return H_SUCCESS;
> }
>
> -static target_ulong register_slb_shadow(CPUPPCState *env, target_ulong addr)
> +static target_ulong register_slb_shadow(PowerPCCPU *cpu, target_ulong addr)
> {
> - CPUState *cs = CPU(ppc_env_get_cpu(env));
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> uint32_t size;
>
> if (addr == 0) {
> @@ -968,7 +973,7 @@ static target_ulong register_slb_shadow(CPUPPCState *env,
> target_ulong addr)
> return H_HARDWARE;
> }
>
> - size = ldl_be_phys(cs->as, addr + 0x4);
> + size = ldl_be_phys(CPU(cpu)->as, addr + 0x4);
> if (size < 0x8) {
> return H_PARAMETER;
> }
> @@ -977,26 +982,28 @@ static target_ulong register_slb_shadow(CPUPPCState
> *env, target_ulong addr)
> return H_PARAMETER;
> }
>
> - if (!env->vpa_addr) {
> + if (!spapr_cpu->vpa_addr) {
> return H_RESOURCE;
> }
>
> - env->slb_shadow_addr = addr;
> - env->slb_shadow_size = size;
> + spapr_cpu->slb_shadow_addr = addr;
> + spapr_cpu->slb_shadow_size = size;
>
> return H_SUCCESS;
> }
>
> -static target_ulong deregister_slb_shadow(CPUPPCState *env, target_ulong
> addr)
> +static target_ulong deregister_slb_shadow(PowerPCCPU *cpu, target_ulong addr)
> {
> - env->slb_shadow_addr = 0;
> - env->slb_shadow_size = 0;
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> +
> + spapr_cpu->slb_shadow_addr = 0;
> + spapr_cpu->slb_shadow_size = 0;
> return H_SUCCESS;
> }
>
> -static target_ulong register_dtl(CPUPPCState *env, target_ulong addr)
> +static target_ulong register_dtl(PowerPCCPU *cpu, target_ulong addr)
> {
> - CPUState *cs = CPU(ppc_env_get_cpu(env));
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> uint32_t size;
>
> if (addr == 0) {
> @@ -1004,26 +1011,28 @@ static target_ulong register_dtl(CPUPPCState *env,
> target_ulong addr)
> return H_HARDWARE;
> }
>
> - size = ldl_be_phys(cs->as, addr + 0x4);
> + size = ldl_be_phys(CPU(cpu)->as, addr + 0x4);
>
> if (size < 48) {
> return H_PARAMETER;
> }
>
> - if (!env->vpa_addr) {
> + if (!spapr_cpu->vpa_addr) {
> return H_RESOURCE;
> }
>
> - env->dtl_addr = addr;
> - env->dtl_size = size;
> + spapr_cpu->dtl_addr = addr;
> + spapr_cpu->dtl_size = size;
>
> return H_SUCCESS;
> }
>
> -static target_ulong deregister_dtl(CPUPPCState *env, target_ulong addr)
> +static target_ulong deregister_dtl(PowerPCCPU *cpu, target_ulong addr)
> {
> - env->dtl_addr = 0;
> - env->dtl_size = 0;
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> +
> + spapr_cpu->dtl_addr = 0;
> + spapr_cpu->dtl_size = 0;
>
> return H_SUCCESS;
> }
> @@ -1035,38 +1044,36 @@ static target_ulong h_register_vpa(PowerPCCPU *cpu,
> sPAPRMachineState *spapr,
> target_ulong procno = args[1];
> target_ulong vpa = args[2];
> target_ulong ret = H_PARAMETER;
> - CPUPPCState *tenv;
> PowerPCCPU *tcpu;
>
> tcpu = spapr_find_cpu(procno);
> if (!tcpu) {
> return H_PARAMETER;
> }
> - tenv = &tcpu->env;
>
> switch (flags) {
> case FLAGS_REGISTER_VPA:
> - ret = register_vpa(tenv, vpa);
> + ret = register_vpa(tcpu, vpa);
> break;
>
> case FLAGS_DEREGISTER_VPA:
> - ret = deregister_vpa(tenv, vpa);
> + ret = deregister_vpa(tcpu, vpa);
> break;
>
> case FLAGS_REGISTER_SLBSHADOW:
> - ret = register_slb_shadow(tenv, vpa);
> + ret = register_slb_shadow(tcpu, vpa);
> break;
>
> case FLAGS_DEREGISTER_SLBSHADOW:
> - ret = deregister_slb_shadow(tenv, vpa);
> + ret = deregister_slb_shadow(tcpu, vpa);
> break;
>
> case FLAGS_REGISTER_DTL:
> - ret = register_dtl(tenv, vpa);
> + ret = register_dtl(tcpu, vpa);
> break;
>
> case FLAGS_DEREGISTER_DTL:
> - ret = deregister_dtl(tenv, vpa);
> + ret = deregister_dtl(tcpu, vpa);
> break;
> }
>
> diff --git a/include/hw/ppc/spapr_cpu_core.h b/include/hw/ppc/spapr_cpu_core.h
> index 47dcfda12b..8ceea2973a 100644
> --- a/include/hw/ppc/spapr_cpu_core.h
> +++ b/include/hw/ppc/spapr_cpu_core.h
> @@ -41,4 +41,15 @@ typedef struct sPAPRCPUCoreClass {
> const char *spapr_get_cpu_core_type(const char *cpu_type);
> void spapr_cpu_set_entry_state(PowerPCCPU *cpu, target_ulong nip,
> target_ulong r3);
>
> +typedef struct sPAPRCPUState {
> + uint64_t vpa_addr;
> + uint64_t slb_shadow_addr, slb_shadow_size;
> + uint64_t dtl_addr, dtl_size;
> +} sPAPRCPUState;
> +
> +static inline sPAPRCPUState *spapr_cpu_state(PowerPCCPU *cpu)
> +{
> + return (sPAPRCPUState *)cpu->machine_data;
> +}
> +
> #endif
> diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
> index a91f1a8777..874da6efbc 100644
> --- a/target/ppc/cpu.h
> +++ b/target/ppc/cpu.h
> @@ -1091,12 +1091,6 @@ struct CPUPPCState {
> target_ulong rmls;
> #endif
>
> -#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY)
> - uint64_t vpa_addr;
> - uint64_t slb_shadow_addr, slb_shadow_size;
> - uint64_t dtl_addr, dtl_size;
> -#endif /* TARGET_PPC64 */
> -
> int error_code;
> uint32_t pending_interrupts;
> #if !defined(CONFIG_USER_ONLY)
> @@ -1205,6 +1199,7 @@ struct PowerPCCPU {
> uint32_t compat_pvr;
> PPCVirtualHypervisor *vhyp;
> Object *intc;
> + void *machine_data;
> int32_t node_id; /* NUMA node this CPU belongs to */
> PPCHash64Options *hash64_opts;
>
> diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
> index 7fe9d0126b..5c0e313ca6 100644
> --- a/target/ppc/kvm.c
> +++ b/target/ppc/kvm.c
> @@ -829,22 +829,22 @@ static int kvm_get_fp(CPUState *cs)
> static int kvm_get_vpa(CPUState *cs)
> {
> PowerPCCPU *cpu = POWERPC_CPU(cs);
> - CPUPPCState *env = &cpu->env;
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> struct kvm_one_reg reg;
> int ret;
>
> reg.id = KVM_REG_PPC_VPA_ADDR;
> - reg.addr = (uintptr_t)&env->vpa_addr;
> + reg.addr = (uintptr_t)&spapr_cpu->vpa_addr;
> ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
> if (ret < 0) {
> DPRINTF("Unable to get VPA address from KVM: %s\n", strerror(errno));
> return ret;
> }
>
> - assert((uintptr_t)&env->slb_shadow_size
> - == ((uintptr_t)&env->slb_shadow_addr + 8));
> + assert((uintptr_t)&spapr_cpu->slb_shadow_size
> + == ((uintptr_t)&spapr_cpu->slb_shadow_addr + 8));
> reg.id = KVM_REG_PPC_VPA_SLB;
> - reg.addr = (uintptr_t)&env->slb_shadow_addr;
> + reg.addr = (uintptr_t)&spapr_cpu->slb_shadow_addr;
> ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
> if (ret < 0) {
> DPRINTF("Unable to get SLB shadow state from KVM: %s\n",
> @@ -852,9 +852,10 @@ static int kvm_get_vpa(CPUState *cs)
> return ret;
> }
>
> - assert((uintptr_t)&env->dtl_size == ((uintptr_t)&env->dtl_addr + 8));
> + assert((uintptr_t)&spapr_cpu->dtl_size
> + == ((uintptr_t)&spapr_cpu->dtl_addr + 8));
> reg.id = KVM_REG_PPC_VPA_DTL;
> - reg.addr = (uintptr_t)&env->dtl_addr;
> + reg.addr = (uintptr_t)&spapr_cpu->dtl_addr;
> ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, ®);
> if (ret < 0) {
> DPRINTF("Unable to get dispatch trace log state from KVM: %s\n",
> @@ -868,7 +869,7 @@ static int kvm_get_vpa(CPUState *cs)
> static int kvm_put_vpa(CPUState *cs)
> {
> PowerPCCPU *cpu = POWERPC_CPU(cs);
> - CPUPPCState *env = &cpu->env;
> + sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
> struct kvm_one_reg reg;
> int ret;
>
> @@ -876,11 +877,12 @@ static int kvm_put_vpa(CPUState *cs)
> * registered. That means when restoring state, if a VPA *is*
> * registered, we need to set that up first. If not, we need to
> * deregister the others before deregistering the master VPA */
> - assert(env->vpa_addr || !(env->slb_shadow_addr || env->dtl_addr));
> + assert(spapr_cpu->vpa_addr
> + || !(spapr_cpu->slb_shadow_addr || spapr_cpu->dtl_addr));
>
> - if (env->vpa_addr) {
> + if (spapr_cpu->vpa_addr) {
> reg.id = KVM_REG_PPC_VPA_ADDR;
> - reg.addr = (uintptr_t)&env->vpa_addr;
> + reg.addr = (uintptr_t)&spapr_cpu->vpa_addr;
> ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
> if (ret < 0) {
> DPRINTF("Unable to set VPA address to KVM: %s\n",
> strerror(errno));
> @@ -888,19 +890,20 @@ static int kvm_put_vpa(CPUState *cs)
> }
> }
>
> - assert((uintptr_t)&env->slb_shadow_size
> - == ((uintptr_t)&env->slb_shadow_addr + 8));
> + assert((uintptr_t)&spapr_cpu->slb_shadow_size
> + == ((uintptr_t)&spapr_cpu->slb_shadow_addr + 8));
> reg.id = KVM_REG_PPC_VPA_SLB;
> - reg.addr = (uintptr_t)&env->slb_shadow_addr;
> + reg.addr = (uintptr_t)&spapr_cpu->slb_shadow_addr;
> ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
> if (ret < 0) {
> DPRINTF("Unable to set SLB shadow state to KVM: %s\n",
> strerror(errno));
> return ret;
> }
>
> - assert((uintptr_t)&env->dtl_size == ((uintptr_t)&env->dtl_addr + 8));
> + assert((uintptr_t)&spapr_cpu->dtl_size
> + == ((uintptr_t)&spapr_cpu->dtl_addr + 8));
> reg.id = KVM_REG_PPC_VPA_DTL;
> - reg.addr = (uintptr_t)&env->dtl_addr;
> + reg.addr = (uintptr_t)&spapr_cpu->dtl_addr;
> ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
> if (ret < 0) {
> DPRINTF("Unable to set dispatch trace log state to KVM: %s\n",
> @@ -908,9 +911,9 @@ static int kvm_put_vpa(CPUState *cs)
> return ret;
> }
>
> - if (!env->vpa_addr) {
> + if (!spapr_cpu->vpa_addr) {
> reg.id = KVM_REG_PPC_VPA_ADDR;
> - reg.addr = (uintptr_t)&env->vpa_addr;
> + reg.addr = (uintptr_t)&spapr_cpu->vpa_addr;
> ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, ®);
> if (ret < 0) {
> DPRINTF("Unable to set VPA address to KVM: %s\n",
> strerror(errno));
> diff --git a/target/ppc/translate_init.inc.c b/target/ppc/translate_init.inc.c
> index bb9296f5a3..76d6f3fd5e 100644
> --- a/target/ppc/translate_init.inc.c
> +++ b/target/ppc/translate_init.inc.c
> @@ -10316,14 +10316,6 @@ static void ppc_cpu_reset(CPUState *s)
> s->exception_index = POWERPC_EXCP_NONE;
> env->error_code = 0;
>
> -#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY)
> - env->vpa_addr = 0;
> - env->slb_shadow_addr = 0;
> - env->slb_shadow_size = 0;
> - env->dtl_addr = 0;
> - env->dtl_size = 0;
> -#endif /* TARGET_PPC64 */
> -
> for (i = 0; i < ARRAY_SIZE(env->spr_cb); i++) {
> ppc_spr_t *spr = &env->spr_cb[i];
>