From 46a1ee4f397ffd305da95fb65dc73be49667ff6d Mon Sep 17 00:00:00 2001 From: James Cowgill Date: Thu, 15 Mar 2018 15:13:48 +0000 Subject: linux-user: implement HWCAP bits on MIPS Add support for the two currently defined HWCAP bits on MIPS - R6 and MSA. Buglink: https://bugs.launchpad.net/qemu/+bug/1754372 Signed-off-by: James Cowgill Reviewed-by: Laurent Vivier Message-Id: <20180315151348.6451-1-james.cowgill@mips.com> Signed-off-by: Laurent Vivier --- linux-user/elfload.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 23e34957f9..c77ed1bb01 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -882,6 +882,30 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *e #define USE_ELF_CORE_DUMP #define ELF_EXEC_PAGESIZE 4096 +/* See arch/mips/include/uapi/asm/hwcap.h. */ +enum { + HWCAP_MIPS_R6 = (1 << 0), + HWCAP_MIPS_MSA = (1 << 1), +}; + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + MIPSCPU *cpu = MIPS_CPU(thread_cpu); + uint32_t hwcaps = 0; + +#define GET_FEATURE(flag, hwcap) \ + do { if (cpu->env.insn_flags & (flag)) { hwcaps |= hwcap; } } while (0) + + GET_FEATURE(ISA_MIPS32R6 | ISA_MIPS64R6, HWCAP_MIPS_R6); + GET_FEATURE(ASE_MSA, HWCAP_MIPS_MSA); + +#undef GET_FEATURE + + return hwcaps; +} + #endif /* TARGET_MIPS */ #ifdef TARGET_MICROBLAZE -- cgit v1.2.1