linux-user: Move hwcap functions to ppc/elfload.c

Change the return type to abi_ulong, and pass in the cpu.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

2 files changed, 119 insertions, 0 deletions

diff --git a/linux-user/ppc/elfload.c b/linux-user/ppc/elfload.c
index 7775dc06fa..a214675650 100644
--- a/linux-user/ppc/elfload.c
+++ b/linux-user/ppc/elfload.c
@@ -13,3 +13,119 @@ const char *get_elf_cpu_model(uint32_t eflags)
     return "750";
 #endif
 }
+
+/*
+ * Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).
+ * See arch/powerpc/include/asm/cputable.h.
+ */
+enum {
+    QEMU_PPC_FEATURE_32 = 0x80000000,
+    QEMU_PPC_FEATURE_64 = 0x40000000,
+    QEMU_PPC_FEATURE_601_INSTR = 0x20000000,
+    QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,
+    QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,
+    QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,
+    QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,
+    QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,
+    QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,
+    QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,
+    QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,
+    QEMU_PPC_FEATURE_NO_TB = 0x00100000,
+    QEMU_PPC_FEATURE_POWER4 = 0x00080000,
+    QEMU_PPC_FEATURE_POWER5 = 0x00040000,
+    QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,
+    QEMU_PPC_FEATURE_CELL = 0x00010000,
+    QEMU_PPC_FEATURE_BOOKE = 0x00008000,
+    QEMU_PPC_FEATURE_SMT = 0x00004000,
+    QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,
+    QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,
+    QEMU_PPC_FEATURE_PA6T = 0x00000800,
+    QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,
+    QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,
+    QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,
+    QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,
+    QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,
+
+    QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,
+    QEMU_PPC_FEATURE_PPC_LE = 0x00000001,
+
+    /* Feature definitions in AT_HWCAP2.  */
+    QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */
+    QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */
+    QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */
+    QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */
+    QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */
+    QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */
+    QEMU_PPC_FEATURE2_VEC_CRYPTO = 0x02000000,
+    QEMU_PPC_FEATURE2_HTM_NOSC = 0x01000000,
+    QEMU_PPC_FEATURE2_ARCH_3_00 = 0x00800000, /* ISA 3.00 */
+    QEMU_PPC_FEATURE2_HAS_IEEE128 = 0x00400000, /* VSX IEEE Bin Float 128-bit */
+    QEMU_PPC_FEATURE2_DARN = 0x00200000, /* darn random number insn */
+    QEMU_PPC_FEATURE2_SCV = 0x00100000, /* scv syscall */
+    QEMU_PPC_FEATURE2_HTM_NO_SUSPEND = 0x00080000, /* TM w/o suspended state */
+    QEMU_PPC_FEATURE2_ARCH_3_1 = 0x00040000, /* ISA 3.1 */
+    QEMU_PPC_FEATURE2_MMA = 0x00020000, /* Matrix-Multiply Assist */
+};
+
+abi_ulong get_elf_hwcap(CPUState *cs)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(cs);
+    uint32_t features = 0;
+
+    /*
+     * We don't have to be terribly complete here; the high points are
+     * Altivec/FP/SPE support.  Anything else is just a bonus.
+     */
+#define GET_FEATURE(flag, feature)                                      \
+    do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
+#define GET_FEATURE2(flags, feature) \
+    do { \
+        if ((cpu->env.insns_flags2 & flags) == flags) { \
+            features |= feature; \
+        } \
+    } while (0)
+    GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);
+    GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);
+    GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);
+    GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);
+    GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);
+    GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);
+    GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);
+    GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);
+    GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP);
+    GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX);
+    GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 |
+                  PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206),
+                  QEMU_PPC_FEATURE_ARCH_2_06);
+
+#undef GET_FEATURE
+#undef GET_FEATURE2
+
+    return features;
+}
+
+abi_ulong get_elf_hwcap2(CPUState *cs)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(cs);
+    uint32_t features = 0;
+
+#define GET_FEATURE(flag, feature)                                      \
+    do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0)
+#define GET_FEATURE2(flag, feature)                                      \
+    do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0)
+
+    GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL);
+    GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR);
+    GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 |
+                  PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07 |
+                  QEMU_PPC_FEATURE2_VEC_CRYPTO);
+    GET_FEATURE2(PPC2_ISA300, QEMU_PPC_FEATURE2_ARCH_3_00 |
+                 QEMU_PPC_FEATURE2_DARN | QEMU_PPC_FEATURE2_HAS_IEEE128);
+    GET_FEATURE2(PPC2_ISA310, QEMU_PPC_FEATURE2_ARCH_3_1 |
+                 QEMU_PPC_FEATURE2_MMA);
+
+#undef GET_FEATURE
+#undef GET_FEATURE2
+
+    return features;
+}
diff --git a/linux-user/ppc/target_elf.h b/linux-user/ppc/target_elf.h
index 8c0a8ea431..4203a89d66 100644
--- a/linux-user/ppc/target_elf.h
+++ b/linux-user/ppc/target_elf.h
@@ -8,4 +8,7 @@
 #ifndef PPC_TARGET_ELF_H
 #define PPC_TARGET_ELF_H
 
+#define HAVE_ELF_HWCAP          1
+#define HAVE_ELF_HWCAP2         1
+
 #endif