[4/9] target/ppc: Add HV support to ppc_interrupts_little_endian

Commit Message

Fabiano Rosas Jan. 3, 2022, 10:07 p.m. UTC

The ppc_interrupts_little_endian function could be used for interrupts
delivered in Hypervisor mode, so add support for powernv8 and powernv9
to it.

Also drop the comment because it is inaccurate, all CPUs that can run
little endian can have interrupts in little endian. The point is
whether they can take interrupts in an endianness different from
MSR_LE.

This change has no functional impact.

Signed-off-by: Fabiano Rosas <[e-mail]>
---
 target/ppc/arch_dump.c   |  2 +-
 target/ppc/cpu.h         | 21 +++++++++++++--------
 target/ppc/excp_helper.c |  2 +-
 3 files changed, 15 insertions(+), 10 deletions(-)

Patch

diff --git a/target/ppc/arch_dump.c b/target/ppc/arch_dump.c
index bb392f6d88..12cde198a3 100644
--- a/target/ppc/arch_dump.c
+++ b/target/ppc/arch_dump.c
@@ -237,7 +237,7 @@  int cpu_get_dump_info(ArchDumpInfo *info,
     info->d_machine = PPC_ELF_MACHINE;
     info->d_class = ELFCLASS;
 
-    if (ppc_interrupts_little_endian(cpu)) {
+    if (ppc_interrupts_little_endian(cpu, false)) {
         info->d_endian = ELFDATA2LSB;
     } else {
         info->d_endian = ELFDATA2MSB;
diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index fc66c3561d..a991da4e74 100644
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -2723,19 +2723,24 @@  static inline bool ppc_has_spr(PowerPCCPU *cpu, int spr)
     return cpu->env.spr_cb[spr].name != NULL;
 }
 
-static inline bool ppc_interrupts_little_endian(PowerPCCPU *cpu)
+static inline bool ppc_interrupts_little_endian(PowerPCCPU *cpu, bool hv)
 {
     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
+    CPUPPCState *env = &cpu->env;
+    bool ile = false;
 
-    /*
-     * Only models that have an LPCR and know about LPCR_ILE can do little
-     * endian.
-     */
-    if (pcc->lpcr_mask & LPCR_ILE) {
-        return !!(cpu->env.spr[SPR_LPCR] & LPCR_ILE);
+    if (hv) {
+        if (is_isa300(pcc)) {
+            ile = !!(env->spr[SPR_HID0] & HID0_POWER9_HILE);
+        } else {
+            ile = !!(env->spr[SPR_HID0] & HID0_HILE);
+        }
+
+    } else if (pcc->lpcr_mask & LPCR_ILE) {
+        ile = !!(env->spr[SPR_LPCR] & LPCR_ILE);
     }
 
-    return false;
+    return ile;
 }
 
 void dump_mmu(CPUPPCState *env);
diff --git a/target/ppc/excp_helper.c b/target/ppc/excp_helper.c
index 160e06e3a3..0dbadc5d07 100644
--- a/target/ppc/excp_helper.c
+++ b/target/ppc/excp_helper.c
@@ -997,7 +997,7 @@  void ppc_cpu_do_fwnmi_machine_check(CPUState *cs, target_ulong vector)
      */
     msr = (1ULL << MSR_ME);
     msr |= env->msr & (1ULL << MSR_SF);
-    if (ppc_interrupts_little_endian(cpu)) {
+    if (ppc_interrupts_little_endian(cpu, false)) {
         msr |= (1ULL << MSR_LE);
     }