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author | Richard Henderson <richard.henderson@linaro.org> | 2023-02-15 20:11:03 -0600 |
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committer | Richard Henderson <richard.henderson@linaro.org> | 2023-05-16 15:21:39 -0700 |
commit | 1ce12a8c83f2dcd10aa324916dcf6f67cc58a882 (patch) | |
tree | a312db20b57fafc85a5da2e53b001e32c7e56b3e /tcg/aarch64/tcg-target.c.inc | |
parent | b764941955d5ff13dd2760b59ce37d98941fc46b (diff) | |
download | qemu-1ce12a8c83f2dcd10aa324916dcf6f67cc58a882.zip qemu-1ce12a8c83f2dcd10aa324916dcf6f67cc58a882.tar.gz qemu-1ce12a8c83f2dcd10aa324916dcf6f67cc58a882.tar.bz2 |
tcg/aarch64: Detect have_lse, have_lse2 for darwin
These features are present for Apple M1.
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tcg/aarch64/tcg-target.c.inc')
-rw-r--r-- | tcg/aarch64/tcg-target.c.inc | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc index fc551a3..c64606a 100644 --- a/tcg/aarch64/tcg-target.c.inc +++ b/tcg/aarch64/tcg-target.c.inc @@ -16,6 +16,9 @@ #ifdef __linux__ #include <asm/hwcap.h> #endif +#ifdef CONFIG_DARWIN +#include <sys/sysctl.h> +#endif /* We're going to re-use TCGType in setting of the SF bit, which controls the size of the operation performed. If we know the values match, it @@ -2903,6 +2906,27 @@ static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op) } } +#ifdef CONFIG_DARWIN +static bool sysctl_for_bool(const char *name) +{ + int val = 0; + size_t len = sizeof(val); + + if (sysctlbyname(name, &val, &len, NULL, 0) == 0) { + return val != 0; + } + + /* + * We might in the future ask for properties not present in older kernels, + * but we're only asking about static properties, all of which should be + * 'int'. So we shouln't see ENOMEM (val too small), or any of the other + * more exotic errors. + */ + assert(errno == ENOENT); + return false; +} +#endif + static void tcg_target_init(TCGContext *s) { #ifdef __linux__ @@ -2910,6 +2934,10 @@ static void tcg_target_init(TCGContext *s) have_lse = hwcap & HWCAP_ATOMICS; have_lse2 = hwcap & HWCAP_USCAT; #endif +#ifdef CONFIG_DARWIN + have_lse = sysctl_for_bool("hw.optional.arm.FEAT_LSE"); + have_lse2 = sysctl_for_bool("hw.optional.arm.FEAT_LSE2"); +#endif tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffffu; tcg_target_available_regs[TCG_TYPE_I64] = 0xffffffffu; |