target/ppc: Check effective address validity

For Radix translation, the EA range is 64-bits. when EA(2:11) are
nonzero, a segment interrupt should occur.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20211231073122.3183583-1-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

target/ppc/mmu-radix64.c

@@ -32,6 +32,11 @@ static bool ppc_radix64_get_fully_qualified_addr(const CPUPPCState *env,
                                                  vaddr eaddr,
                                                  uint64_t *lpid, uint64_t *pid)
 {
+    /* When EA(2:11) are nonzero, raise a segment interrupt */
+    if (eaddr & ~R_EADDR_VALID_MASK) {
+        return false;
+    }
+
     if (msr_hv) { /* MSR[HV] -> Hypervisor/bare metal */
         switch (eaddr & R_EADDR_QUADRANT) {
         case R_EADDR_QUADRANT0:

target/ppc/mmu-radix64.h

@@ -5,6 +5,7 @@
 
 /* Radix Quadrants */
 #define R_EADDR_MASK            0x3FFFFFFFFFFFFFFF
+#define R_EADDR_VALID_MASK      0xC00FFFFFFFFFFFFF
 #define R_EADDR_QUADRANT        0xC000000000000000
 #define R_EADDR_QUADRANT0       0x0000000000000000
 #define R_EADDR_QUADRANT1       0x4000000000000000