s390x: Vector Register IOCTLs

Handle the actual syncing of the vector registers with kernel space,
via the get/put register IOCTLs.

The vector registers that were introduced with the z13 overlay
the existing floating point registers.  FP registers 0-15 are
the high-halves of vector registers 0-15.  Thus, remove the
freg fields and replace them with the equivalent vector field
to avoid errors in duplication.  Moreover, synchronize either the
vector registers via kvm_sync_regs, or floating point registers
via the GET/SET FPU IOCTLs.

Signed-off-by: Eric Farman <farman@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index e968769e8e..708349ca04 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -81,7 +81,11 @@ typedef struct MchkQueue {
 
 typedef struct CPUS390XState {
     uint64_t regs[16];     /* GP registers */
-    CPU_DoubleU fregs[16]; /* FP registers */
+    /*
+     * The floating point registers are part of the vector registers.
+     * vregs[0][0] -> vregs[15][0] are 16 floating point registers
+     */
+    CPU_DoubleU vregs[32][2];  /* vector registers */
     uint32_t aregs[16];    /* access registers */
 
     uint32_t fpc;          /* floating-point control register */
@@ -164,7 +168,7 @@ typedef struct CPUS390XState {
 
 static inline CPU_DoubleU *get_freg(CPUS390XState *cs, int nr)
 {
-    return &cs->fregs[nr];
+    return &cs->vregs[nr][0];
 }
 
 #include "cpu-qom.h"