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linux-user: Support HWCAP2 in PowerPC

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Set bits in the AT_HWCAP2 entry of the AUXV.  Specifically, detect and set bits
for bctar, ISEL and ISA 2.07.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tom Musta 2014-06-16 11:03:22 -05:00 committed by Alexander Graf
parent 0e019746d7
commit a60438ddd6
1 changed files with 31 additions and 0 deletions
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31
linux-user/elfload.c
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@ -736,6 +736,14 @@ enum {
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 */
};
#define ELF_HWCAP get_elf_hwcap()
@ -770,6 +778,29 @@ static uint32_t get_elf_hwcap(void)
return features;
}
#define ELF_HWCAP2 get_elf_hwcap2()
static uint32_t get_elf_hwcap2(void)
{
PowerPCCPU *cpu = POWERPC_CPU(thread_cpu);
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);
#undef GET_FEATURE
#undef GET_FEATURE2
return features;
}
/*
* The requirements here are:
* - keep the final alignment of sp (sp & 0xf)