spapr_hcall: Add address-translation-mode-on-interrupt resource in H_SET_MODE

This adds handling of the RESOURCE_ADDR_TRANS_MODE resource from
the H_SET_MODE, for POWER8 (PowerISA 2.07) only.

This defines AIL flags for LPCR special register.

This changes @excp_prefix according to the mode, takes effect in TCG.

This turns support of a new capability PPC2_ISA207S flag for TCG.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 47 insertions, 0 deletions

diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index cff3b0f..7952077 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -743,6 +743,49 @@ static target_ulong h_set_mode_resouce_le(PowerPCCPU *cpu,
     return H_UNSUPPORTED_FLAG;
 }
 
+static target_ulong h_set_mode_resouce_addr_trans_mode(PowerPCCPU *cpu,
+                                                       target_ulong mflags,
+                                                       target_ulong value1,
+                                                       target_ulong value2)
+{
+    CPUState *cs;
+    PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
+    target_ulong prefix;
+
+    if (!(pcc->insns_flags2 & PPC2_ISA207S)) {
+        return H_P2;
+    }
+    if (value1) {
+        return H_P3;
+    }
+    if (value2) {
+        return H_P4;
+    }
+
+    switch (mflags) {
+    case H_SET_MODE_ADDR_TRANS_NONE:
+        prefix = 0;
+        break;
+    case H_SET_MODE_ADDR_TRANS_0001_8000:
+        prefix = 0x18000;
+        break;
+    case H_SET_MODE_ADDR_TRANS_C000_0000_0000_4000:
+        prefix = 0xC000000000004000;
+        break;
+    default:
+        return H_UNSUPPORTED_FLAG;
+    }
+
+    CPU_FOREACH(cs) {
+        CPUPPCState *env = &POWERPC_CPU(cpu)->env;
+
+        set_spr(cs, SPR_LPCR, mflags << LPCR_AIL_SHIFT, LPCR_AIL);
+        env->excp_prefix = prefix;
+    }
+
+    return H_SUCCESS;
+}
+
 static target_ulong h_set_mode(PowerPCCPU *cpu, sPAPREnvironment *spapr,
                                target_ulong opcode, target_ulong *args)
 {
@@ -753,6 +796,10 @@ static target_ulong h_set_mode(PowerPCCPU *cpu, sPAPREnvironment *spapr,
     case H_SET_MODE_RESOURCE_LE:
         ret = h_set_mode_resouce_le(cpu, args[0], args[2], args[3]);
         break;
+    case H_SET_MODE_RESOURCE_ADDR_TRANS_MODE:
+        ret = h_set_mode_resouce_addr_trans_mode(cpu, args[0],
+                                                 args[2], args[3]);
+        break;
     }
 
     return ret;