[Qemu-devel] [PATCH v6] spapr_hcall: add address-translation-mode-on-interrupt resource in H_SET_MODE

[Alexey Kardashevskiy]

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

Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru>
Reviewed-by: Mike Day <ncm...@ncultra.org>
---
Changes:
v6:
* replaced "return" with "goto out"/"break" for better consistency
---
 hw/ppc/spapr_hcall.c | 29 +++++++++++++++++++++++++++++
 target-ppc/cpu.h     |  2 ++
 2 files changed, 31 insertions(+)

diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index 0bae053..7e4d7ff 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -746,6 +746,35 @@ static target_ulong h_set_mode(PowerPCCPU *cpu, 
sPAPREnvironment *spapr,
         default:
             ret = H_UNSUPPORTED_FLAG;
         }
+    } else if (resource == H_SET_MODE_RESOURCE_ADDR_TRANS_MODE) {
+        PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
+
+        if (!(pcc->insns_flags2 & PPC2_ISA207S)) {
+            ret = H_P2;
+            goto out;
+        }
+        if (value1) {
+            ret = H_P3;
+            goto out;
+        }
+        if (value2) {
+            ret = H_P4;
+            goto out;
+        }
+        switch (mflags) {
+        case 0:
+        case 2:
+        case 3:
+            CPU_FOREACH(cs) {
+                set_spr(cs, SPR_LPCR, mflags << LPCR_AIL_SH, LPCR_AIL);
+            }
+            ret = H_SUCCESS;
+            break;
+
+        default:
+            ret = H_UNSUPPORTED_FLAG;
+            break;
+        }
     }
 
 out:
diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index 2719c08..39527e2 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -463,6 +463,8 @@ struct ppc_slb_t {
 #define MSR_LE   0  /* Little-endian mode                           1 hflags */
 
 #define LPCR_ILE (1 << (63-38))
+#define LPCR_AIL      0x01800000      /* Alternate interrupt location */
+#define LPCR_AIL_SH   (63-40)
 
 #define msr_sf   ((env->msr >> MSR_SF)   & 1)
 #define msr_isf  ((env->msr >> MSR_ISF)  & 1)
-- 
1.8.4.rc4