diff mbox series

[v2,4/4] target/ppc: Add POWER10 exception model

Message ID 20210415054227.1793812-5-npiggin@gmail.com
State New
Headers show
Series ppc: rework AIL logic, add POWER10 exception model | expand

Commit Message

Nicholas Piggin April 15, 2021, 5:42 a.m. UTC
POWER10 adds a new bit that modifies interrupt behaviour, LPCR[HAIL],
and it removes support for the LPCR[AIL]=0b10 mode.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 hw/ppc/spapr_hcall.c            |  7 ++++-
 target/ppc/cpu-qom.h            |  2 ++
 target/ppc/cpu.h                |  5 ++--
 target/ppc/excp_helper.c        | 51 +++++++++++++++++++++++++++++++--
 target/ppc/translate.c          |  3 +-
 target/ppc/translate_init.c.inc |  2 +-
 6 files changed, 62 insertions(+), 8 deletions(-)

Comments

David Gibson April 16, 2021, 4:28 a.m. UTC | #1
On Thu, Apr 15, 2021 at 03:42:27PM +1000, Nicholas Piggin wrote:
> POWER10 adds a new bit that modifies interrupt behaviour, LPCR[HAIL],
> and it removes support for the LPCR[AIL]=0b10 mode.
> 
> Reviewed-by: Cédric Le Goater <clg@kaod.org>
> Tested-by: Cédric Le Goater <clg@kaod.org>
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> ---
>  hw/ppc/spapr_hcall.c            |  7 ++++-
>  target/ppc/cpu-qom.h            |  2 ++
>  target/ppc/cpu.h                |  5 ++--
>  target/ppc/excp_helper.c        | 51 +++++++++++++++++++++++++++++++--
>  target/ppc/translate.c          |  3 +-
>  target/ppc/translate_init.c.inc |  2 +-
>  6 files changed, 62 insertions(+), 8 deletions(-)
> 
> diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
> index 2fbe04a689..6802cd4dc8 100644
> --- a/hw/ppc/spapr_hcall.c
> +++ b/hw/ppc/spapr_hcall.c
> @@ -1396,7 +1396,12 @@ static target_ulong h_set_mode_resource_addr_trans_mode(PowerPCCPU *cpu,
>      }
>  
>      if (mflags == 1) {
> -        /* AIL=1 is reserved */
> +        /* AIL=1 is reserved in POWER8/POWER9 */
> +        return H_UNSUPPORTED_FLAG;
> +    }
> +
> +    if (mflags == 2 && (pcc->insns_flags2 & PPC2_ISA310)) {
> +        /* AIL=2 is also reserved in POWER10 (ISA v3.1) */
>          return H_UNSUPPORTED_FLAG;
>      }
>  
> diff --git a/target/ppc/cpu-qom.h b/target/ppc/cpu-qom.h
> index 118baf8d41..06b6571bc9 100644
> --- a/target/ppc/cpu-qom.h
> +++ b/target/ppc/cpu-qom.h
> @@ -116,6 +116,8 @@ enum powerpc_excp_t {
>      POWERPC_EXCP_POWER8,
>      /* POWER9 exception model           */
>      POWERPC_EXCP_POWER9,
> +    /* POWER10 exception model           */
> +    POWERPC_EXCP_POWER10,
>  };
>  
>  /*****************************************************************************/
> diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
> index 5200a16d23..9d35cdfa92 100644
> --- a/target/ppc/cpu.h
> +++ b/target/ppc/cpu.h
> @@ -354,10 +354,11 @@ typedef struct ppc_v3_pate_t {
>  #define LPCR_PECE_U_SHIFT (63 - 19)
>  #define LPCR_PECE_U_MASK  (0x7ull << LPCR_PECE_U_SHIFT)
>  #define LPCR_HVEE         PPC_BIT(17) /* Hypervisor Virt Exit Enable */
> -#define LPCR_RMLS_SHIFT   (63 - 37)
> +#define LPCR_RMLS_SHIFT   (63 - 37)   /* RMLS (removed in ISA v3.0) */
>  #define LPCR_RMLS         (0xfull << LPCR_RMLS_SHIFT)
> +#define LPCR_HAIL         PPC_BIT(37) /* ISA v3.1 HV AIL=3 equivalent */
>  #define LPCR_ILE          PPC_BIT(38)
> -#define LPCR_AIL_SHIFT    (63 - 40)      /* Alternate interrupt location */
> +#define LPCR_AIL_SHIFT    (63 - 40)   /* Alternate interrupt location */
>  #define LPCR_AIL          (3ull << LPCR_AIL_SHIFT)
>  #define LPCR_UPRT         PPC_BIT(41) /* Use Process Table */
>  #define LPCR_EVIRT        PPC_BIT(42) /* Enhanced Virtualisation */
> diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
> index 964a58cfdc..38a1482519 100644
> --- a/target/ppc/excp_helper.c
> +++ b/target/ppc/excp_helper.c
> @@ -170,7 +170,27 @@ static int powerpc_reset_wakeup(CPUState *cs, CPUPPCState *env, int excp,
>   * +-------------------------------------------------------+
>   *
>   * The difference with POWER9 being that MSR[HV] 0->1 interrupts can be sent to
> - * the hypervisor in AIL mode if the guest is radix.
> + * the hypervisor in AIL mode if the guest is radix. This is good for
> + * performance but allows the guest to influence the AIL of hypervisor
> + * interrupts using its MSR, and also the hypervisor must disallow guest
> + * interrupts (MSR[HV] 0->0) from using AIL if the hypervisor does not want to
> + * use AIL for its MSR[HV] 0->1 interrupts.
> + *
> + * POWER10 addresses those issues with a new LPCR[HAIL] bit that is applied to
> + * interrupts that begin execution with MSR[HV]=1 (so both MSR[HV] 0->1 and
> + * MSR[HV] 1->1).
> + *
> + * HAIL=1 is equivalent to AIL=3, for interrupts delivered with MSR[HV]=1.
> + *
> + * POWER10 behaviour is
> + * | LPCR[AIL] | LPCR[HAIL] | MSR[IR||DR] | MSR[HV] | new MSR[HV] | AIL |
> + * +-----------+------------+-------------+---------+-------------+-----+
> + * | a         | h          | 00/01/10    | 0       | 0           | 0   |
> + * | a         | h          | 11          | 0       | 0           | a   |
> + * | a         | h          | x           | 0       | 1           | h   |
> + * | a         | h          | 00/01/10    | 1       | 1           | 0   |
> + * | a         | h          | 11          | 1       | 1           | h   |
> + * +--------------------------------------------------------------------+
>   */
>  static inline void ppc_excp_apply_ail(PowerPCCPU *cpu, int excp_model, int excp,
>                                        target_ulong msr,
> @@ -210,6 +230,29 @@ static inline void ppc_excp_apply_ail(PowerPCCPU *cpu, int excp_model, int excp,
>              /* AIL=1 is reserved */
>              return;
>          }
> +
> +    } else if (excp_model == POWERPC_EXCP_POWER10) {
> +        if (!mmu_all_on && !hv_escalation) {
> +            /*
> +             * AIL works for HV interrupts even with guest MSR[IR/DR] disabled.
> +             * Guest->guest and HV->HV interrupts do require MMU on.
> +             */
> +            return;
> +        }
> +
> +        if (*new_msr & MSR_HVB) {
> +            if (!(env->spr[SPR_LPCR] & LPCR_HAIL)) {
> +                /* HV interrupts depend on LPCR[HAIL] */
> +                return;
> +            }
> +            ail = 3; /* HAIL=1 gives AIL=3 behaviour for HV interrupts */
> +        } else {
> +            ail = (env->spr[SPR_LPCR] & LPCR_AIL) >> LPCR_AIL_SHIFT;
> +        }
> +        if (ail != 3) {
> +            /* AIL=1 and AIL=2 are reserved */
> +            return;

As with POWER9, I wonder if we should actuall filter this at LPCR
write time and assert() here.

On actual hardware, what will happen if you attempt to write a bad AIL
to the LPCR?

> +        }
>      } else {
>          /* Other processors do not support AIL */
>          return;
> @@ -322,7 +365,8 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
>  #if defined(TARGET_PPC64)
>      if (excp_model == POWERPC_EXCP_POWER7 ||
>          excp_model == POWERPC_EXCP_POWER8 ||
> -        excp_model == POWERPC_EXCP_POWER9) {
> +        excp_model == POWERPC_EXCP_POWER9 ||
> +        excp_model == POWERPC_EXCP_POWER10) {
>          lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0);
>      } else
>  #endif /* defined(TARGET_PPC64) */
> @@ -842,7 +886,8 @@ static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
>          } else if (env->spr[SPR_LPCR] & LPCR_ILE) {
>              new_msr |= (target_ulong)1 << MSR_LE;
>          }
> -    } else if (excp_model == POWERPC_EXCP_POWER9) {
> +    } else if (excp_model == POWERPC_EXCP_POWER9 ||
> +               excp_model == POWERPC_EXCP_POWER10) {
>          if (new_msr & MSR_HVB) {
>              if (env->spr[SPR_HID0] & HID0_POWER9_HILE) {
>                  new_msr |= (target_ulong)1 << MSR_LE;
> diff --git a/target/ppc/translate.c b/target/ppc/translate.c
> index 0984ce637b..e9ed001229 100644
> --- a/target/ppc/translate.c
> +++ b/target/ppc/translate.c
> @@ -7731,7 +7731,8 @@ void ppc_cpu_dump_state(CPUState *cs, FILE *f, int flags)
>  #if defined(TARGET_PPC64)
>      if (env->excp_model == POWERPC_EXCP_POWER7 ||
>          env->excp_model == POWERPC_EXCP_POWER8 ||
> -        env->excp_model == POWERPC_EXCP_POWER9)  {
> +        env->excp_model == POWERPC_EXCP_POWER9 ||
> +        env->excp_model == POWERPC_EXCP_POWER10)  {
>          qemu_fprintf(f, "HSRR0 " TARGET_FMT_lx " HSRR1 " TARGET_FMT_lx "\n",
>                       env->spr[SPR_HSRR0], env->spr[SPR_HSRR1]);
>      }
> diff --git a/target/ppc/translate_init.c.inc b/target/ppc/translate_init.c.inc
> index a82d9ed647..76d82cc2f6 100644
> --- a/target/ppc/translate_init.c.inc
> +++ b/target/ppc/translate_init.c.inc
> @@ -9317,7 +9317,7 @@ POWERPC_FAMILY(POWER10)(ObjectClass *oc, void *data)
>      pcc->radix_page_info = &POWER10_radix_page_info;
>      pcc->lrg_decr_bits = 56;
>  #endif
> -    pcc->excp_model = POWERPC_EXCP_POWER9;
> +    pcc->excp_model = POWERPC_EXCP_POWER10;
>      pcc->bus_model = PPC_FLAGS_INPUT_POWER9;
>      pcc->bfd_mach = bfd_mach_ppc64;
>      pcc->flags = POWERPC_FLAG_VRE | POWERPC_FLAG_SE |
Nicholas Piggin April 17, 2021, 3:31 a.m. UTC | #2
Excerpts from David Gibson's message of April 16, 2021 2:28 pm:
> On Thu, Apr 15, 2021 at 03:42:27PM +1000, Nicholas Piggin wrote:
>> POWER10 adds a new bit that modifies interrupt behaviour, LPCR[HAIL],
>> and it removes support for the LPCR[AIL]=0b10 mode.
>> 
>> Reviewed-by: Cédric Le Goater <clg@kaod.org>
>> Tested-by: Cédric Le Goater <clg@kaod.org>
>> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
>> ---
>>  hw/ppc/spapr_hcall.c            |  7 ++++-
>>  target/ppc/cpu-qom.h            |  2 ++
>>  target/ppc/cpu.h                |  5 ++--
>>  target/ppc/excp_helper.c        | 51 +++++++++++++++++++++++++++++++--
>>  target/ppc/translate.c          |  3 +-
>>  target/ppc/translate_init.c.inc |  2 +-
>>  6 files changed, 62 insertions(+), 8 deletions(-)
>> 
>> diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
>> index 2fbe04a689..6802cd4dc8 100644
>> --- a/hw/ppc/spapr_hcall.c
>> +++ b/hw/ppc/spapr_hcall.c
>> @@ -1396,7 +1396,12 @@ static target_ulong h_set_mode_resource_addr_trans_mode(PowerPCCPU *cpu,
>>      }
>>  
>>      if (mflags == 1) {
>> -        /* AIL=1 is reserved */
>> +        /* AIL=1 is reserved in POWER8/POWER9 */
>> +        return H_UNSUPPORTED_FLAG;
>> +    }
>> +
>> +    if (mflags == 2 && (pcc->insns_flags2 & PPC2_ISA310)) {
>> +        /* AIL=2 is also reserved in POWER10 (ISA v3.1) */
>>          return H_UNSUPPORTED_FLAG;
>>      }
>>  
>> diff --git a/target/ppc/cpu-qom.h b/target/ppc/cpu-qom.h
>> index 118baf8d41..06b6571bc9 100644
>> --- a/target/ppc/cpu-qom.h
>> +++ b/target/ppc/cpu-qom.h
>> @@ -116,6 +116,8 @@ enum powerpc_excp_t {
>>      POWERPC_EXCP_POWER8,
>>      /* POWER9 exception model           */
>>      POWERPC_EXCP_POWER9,
>> +    /* POWER10 exception model           */
>> +    POWERPC_EXCP_POWER10,
>>  };
>>  
>>  /*****************************************************************************/
>> diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
>> index 5200a16d23..9d35cdfa92 100644
>> --- a/target/ppc/cpu.h
>> +++ b/target/ppc/cpu.h
>> @@ -354,10 +354,11 @@ typedef struct ppc_v3_pate_t {
>>  #define LPCR_PECE_U_SHIFT (63 - 19)
>>  #define LPCR_PECE_U_MASK  (0x7ull << LPCR_PECE_U_SHIFT)
>>  #define LPCR_HVEE         PPC_BIT(17) /* Hypervisor Virt Exit Enable */
>> -#define LPCR_RMLS_SHIFT   (63 - 37)
>> +#define LPCR_RMLS_SHIFT   (63 - 37)   /* RMLS (removed in ISA v3.0) */
>>  #define LPCR_RMLS         (0xfull << LPCR_RMLS_SHIFT)
>> +#define LPCR_HAIL         PPC_BIT(37) /* ISA v3.1 HV AIL=3 equivalent */
>>  #define LPCR_ILE          PPC_BIT(38)
>> -#define LPCR_AIL_SHIFT    (63 - 40)      /* Alternate interrupt location */
>> +#define LPCR_AIL_SHIFT    (63 - 40)   /* Alternate interrupt location */
>>  #define LPCR_AIL          (3ull << LPCR_AIL_SHIFT)
>>  #define LPCR_UPRT         PPC_BIT(41) /* Use Process Table */
>>  #define LPCR_EVIRT        PPC_BIT(42) /* Enhanced Virtualisation */
>> diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
>> index 964a58cfdc..38a1482519 100644
>> --- a/target/ppc/excp_helper.c
>> +++ b/target/ppc/excp_helper.c
>> @@ -170,7 +170,27 @@ static int powerpc_reset_wakeup(CPUState *cs, CPUPPCState *env, int excp,
>>   * +-------------------------------------------------------+
>>   *
>>   * The difference with POWER9 being that MSR[HV] 0->1 interrupts can be sent to
>> - * the hypervisor in AIL mode if the guest is radix.
>> + * the hypervisor in AIL mode if the guest is radix. This is good for
>> + * performance but allows the guest to influence the AIL of hypervisor
>> + * interrupts using its MSR, and also the hypervisor must disallow guest
>> + * interrupts (MSR[HV] 0->0) from using AIL if the hypervisor does not want to
>> + * use AIL for its MSR[HV] 0->1 interrupts.
>> + *
>> + * POWER10 addresses those issues with a new LPCR[HAIL] bit that is applied to
>> + * interrupts that begin execution with MSR[HV]=1 (so both MSR[HV] 0->1 and
>> + * MSR[HV] 1->1).
>> + *
>> + * HAIL=1 is equivalent to AIL=3, for interrupts delivered with MSR[HV]=1.
>> + *
>> + * POWER10 behaviour is
>> + * | LPCR[AIL] | LPCR[HAIL] | MSR[IR||DR] | MSR[HV] | new MSR[HV] | AIL |
>> + * +-----------+------------+-------------+---------+-------------+-----+
>> + * | a         | h          | 00/01/10    | 0       | 0           | 0   |
>> + * | a         | h          | 11          | 0       | 0           | a   |
>> + * | a         | h          | x           | 0       | 1           | h   |
>> + * | a         | h          | 00/01/10    | 1       | 1           | 0   |
>> + * | a         | h          | 11          | 1       | 1           | h   |
>> + * +--------------------------------------------------------------------+
>>   */
>>  static inline void ppc_excp_apply_ail(PowerPCCPU *cpu, int excp_model, int excp,
>>                                        target_ulong msr,
>> @@ -210,6 +230,29 @@ static inline void ppc_excp_apply_ail(PowerPCCPU *cpu, int excp_model, int excp,
>>              /* AIL=1 is reserved */
>>              return;
>>          }
>> +
>> +    } else if (excp_model == POWERPC_EXCP_POWER10) {
>> +        if (!mmu_all_on && !hv_escalation) {
>> +            /*
>> +             * AIL works for HV interrupts even with guest MSR[IR/DR] disabled.
>> +             * Guest->guest and HV->HV interrupts do require MMU on.
>> +             */
>> +            return;
>> +        }
>> +
>> +        if (*new_msr & MSR_HVB) {
>> +            if (!(env->spr[SPR_LPCR] & LPCR_HAIL)) {
>> +                /* HV interrupts depend on LPCR[HAIL] */
>> +                return;
>> +            }
>> +            ail = 3; /* HAIL=1 gives AIL=3 behaviour for HV interrupts */
>> +        } else {
>> +            ail = (env->spr[SPR_LPCR] & LPCR_AIL) >> LPCR_AIL_SHIFT;
>> +        }
>> +        if (ail != 3) {
>> +            /* AIL=1 and AIL=2 are reserved */
>> +            return;
> 
> As with POWER9, I wonder if we should actuall filter this at LPCR
> write time and assert() here.

Could do. The processor is allowed to read back reserved bits as 0. I 
can't quite see how reserved values in multi bit fields are treated
though. Neither bits are reserved but the value 2 is. If you write 3
then 2, would the second write also clear bit 0, or would it ignore
the write and leave bit 1 set? I don't see either being explicitly
allowed so it might retain the value 2 I suspect.

> On actual hardware, what will happen if you attempt to write a bad AIL
> to the LPCR?

Good question, I don't know. We don't have an easy way to place a
interrupt handler at 0x17000 in Linux I think. I'll see if I can
get some data.

Thanks,
Nick
diff mbox series

Patch

diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index 2fbe04a689..6802cd4dc8 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -1396,7 +1396,12 @@  static target_ulong h_set_mode_resource_addr_trans_mode(PowerPCCPU *cpu,
     }
 
     if (mflags == 1) {
-        /* AIL=1 is reserved */
+        /* AIL=1 is reserved in POWER8/POWER9 */
+        return H_UNSUPPORTED_FLAG;
+    }
+
+    if (mflags == 2 && (pcc->insns_flags2 & PPC2_ISA310)) {
+        /* AIL=2 is also reserved in POWER10 (ISA v3.1) */
         return H_UNSUPPORTED_FLAG;
     }
 
diff --git a/target/ppc/cpu-qom.h b/target/ppc/cpu-qom.h
index 118baf8d41..06b6571bc9 100644
--- a/target/ppc/cpu-qom.h
+++ b/target/ppc/cpu-qom.h
@@ -116,6 +116,8 @@  enum powerpc_excp_t {
     POWERPC_EXCP_POWER8,
     /* POWER9 exception model           */
     POWERPC_EXCP_POWER9,
+    /* POWER10 exception model           */
+    POWERPC_EXCP_POWER10,
 };
 
 /*****************************************************************************/
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index 5200a16d23..9d35cdfa92 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -354,10 +354,11 @@  typedef struct ppc_v3_pate_t {
 #define LPCR_PECE_U_SHIFT (63 - 19)
 #define LPCR_PECE_U_MASK  (0x7ull << LPCR_PECE_U_SHIFT)
 #define LPCR_HVEE         PPC_BIT(17) /* Hypervisor Virt Exit Enable */
-#define LPCR_RMLS_SHIFT   (63 - 37)
+#define LPCR_RMLS_SHIFT   (63 - 37)   /* RMLS (removed in ISA v3.0) */
 #define LPCR_RMLS         (0xfull << LPCR_RMLS_SHIFT)
+#define LPCR_HAIL         PPC_BIT(37) /* ISA v3.1 HV AIL=3 equivalent */
 #define LPCR_ILE          PPC_BIT(38)
-#define LPCR_AIL_SHIFT    (63 - 40)      /* Alternate interrupt location */
+#define LPCR_AIL_SHIFT    (63 - 40)   /* Alternate interrupt location */
 #define LPCR_AIL          (3ull << LPCR_AIL_SHIFT)
 #define LPCR_UPRT         PPC_BIT(41) /* Use Process Table */
 #define LPCR_EVIRT        PPC_BIT(42) /* Enhanced Virtualisation */
diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 964a58cfdc..38a1482519 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -170,7 +170,27 @@  static int powerpc_reset_wakeup(CPUState *cs, CPUPPCState *env, int excp,
  * +-------------------------------------------------------+
  *
  * The difference with POWER9 being that MSR[HV] 0->1 interrupts can be sent to
- * the hypervisor in AIL mode if the guest is radix.
+ * the hypervisor in AIL mode if the guest is radix. This is good for
+ * performance but allows the guest to influence the AIL of hypervisor
+ * interrupts using its MSR, and also the hypervisor must disallow guest
+ * interrupts (MSR[HV] 0->0) from using AIL if the hypervisor does not want to
+ * use AIL for its MSR[HV] 0->1 interrupts.
+ *
+ * POWER10 addresses those issues with a new LPCR[HAIL] bit that is applied to
+ * interrupts that begin execution with MSR[HV]=1 (so both MSR[HV] 0->1 and
+ * MSR[HV] 1->1).
+ *
+ * HAIL=1 is equivalent to AIL=3, for interrupts delivered with MSR[HV]=1.
+ *
+ * POWER10 behaviour is
+ * | LPCR[AIL] | LPCR[HAIL] | MSR[IR||DR] | MSR[HV] | new MSR[HV] | AIL |
+ * +-----------+------------+-------------+---------+-------------+-----+
+ * | a         | h          | 00/01/10    | 0       | 0           | 0   |
+ * | a         | h          | 11          | 0       | 0           | a   |
+ * | a         | h          | x           | 0       | 1           | h   |
+ * | a         | h          | 00/01/10    | 1       | 1           | 0   |
+ * | a         | h          | 11          | 1       | 1           | h   |
+ * +--------------------------------------------------------------------+
  */
 static inline void ppc_excp_apply_ail(PowerPCCPU *cpu, int excp_model, int excp,
                                       target_ulong msr,
@@ -210,6 +230,29 @@  static inline void ppc_excp_apply_ail(PowerPCCPU *cpu, int excp_model, int excp,
             /* AIL=1 is reserved */
             return;
         }
+
+    } else if (excp_model == POWERPC_EXCP_POWER10) {
+        if (!mmu_all_on && !hv_escalation) {
+            /*
+             * AIL works for HV interrupts even with guest MSR[IR/DR] disabled.
+             * Guest->guest and HV->HV interrupts do require MMU on.
+             */
+            return;
+        }
+
+        if (*new_msr & MSR_HVB) {
+            if (!(env->spr[SPR_LPCR] & LPCR_HAIL)) {
+                /* HV interrupts depend on LPCR[HAIL] */
+                return;
+            }
+            ail = 3; /* HAIL=1 gives AIL=3 behaviour for HV interrupts */
+        } else {
+            ail = (env->spr[SPR_LPCR] & LPCR_AIL) >> LPCR_AIL_SHIFT;
+        }
+        if (ail != 3) {
+            /* AIL=1 and AIL=2 are reserved */
+            return;
+        }
     } else {
         /* Other processors do not support AIL */
         return;
@@ -322,7 +365,8 @@  static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
 #if defined(TARGET_PPC64)
     if (excp_model == POWERPC_EXCP_POWER7 ||
         excp_model == POWERPC_EXCP_POWER8 ||
-        excp_model == POWERPC_EXCP_POWER9) {
+        excp_model == POWERPC_EXCP_POWER9 ||
+        excp_model == POWERPC_EXCP_POWER10) {
         lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0);
     } else
 #endif /* defined(TARGET_PPC64) */
@@ -842,7 +886,8 @@  static inline void powerpc_excp(PowerPCCPU *cpu, int excp_model, int excp)
         } else if (env->spr[SPR_LPCR] & LPCR_ILE) {
             new_msr |= (target_ulong)1 << MSR_LE;
         }
-    } else if (excp_model == POWERPC_EXCP_POWER9) {
+    } else if (excp_model == POWERPC_EXCP_POWER9 ||
+               excp_model == POWERPC_EXCP_POWER10) {
         if (new_msr & MSR_HVB) {
             if (env->spr[SPR_HID0] & HID0_POWER9_HILE) {
                 new_msr |= (target_ulong)1 << MSR_LE;
diff --git a/target/ppc/translate.c b/target/ppc/translate.c
index 0984ce637b..e9ed001229 100644
--- a/target/ppc/translate.c
+++ b/target/ppc/translate.c
@@ -7731,7 +7731,8 @@  void ppc_cpu_dump_state(CPUState *cs, FILE *f, int flags)
 #if defined(TARGET_PPC64)
     if (env->excp_model == POWERPC_EXCP_POWER7 ||
         env->excp_model == POWERPC_EXCP_POWER8 ||
-        env->excp_model == POWERPC_EXCP_POWER9)  {
+        env->excp_model == POWERPC_EXCP_POWER9 ||
+        env->excp_model == POWERPC_EXCP_POWER10)  {
         qemu_fprintf(f, "HSRR0 " TARGET_FMT_lx " HSRR1 " TARGET_FMT_lx "\n",
                      env->spr[SPR_HSRR0], env->spr[SPR_HSRR1]);
     }
diff --git a/target/ppc/translate_init.c.inc b/target/ppc/translate_init.c.inc
index a82d9ed647..76d82cc2f6 100644
--- a/target/ppc/translate_init.c.inc
+++ b/target/ppc/translate_init.c.inc
@@ -9317,7 +9317,7 @@  POWERPC_FAMILY(POWER10)(ObjectClass *oc, void *data)
     pcc->radix_page_info = &POWER10_radix_page_info;
     pcc->lrg_decr_bits = 56;
 #endif
-    pcc->excp_model = POWERPC_EXCP_POWER9;
+    pcc->excp_model = POWERPC_EXCP_POWER10;
     pcc->bus_model = PPC_FLAGS_INPUT_POWER9;
     pcc->bfd_mach = bfd_mach_ppc64;
     pcc->flags = POWERPC_FLAG_VRE | POWERPC_FLAG_SE |