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[PATCH v3 18/57] tcg/aarch64: Detect have_lse, have_lse2 for darwin
From: |
Richard Henderson |
Subject: |
[PATCH v3 18/57] tcg/aarch64: Detect have_lse, have_lse2 for darwin |
Date: |
Tue, 25 Apr 2023 20:31:07 +0100 |
These features are present for Apple M1.
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tcg/aarch64/tcg-target.c.inc | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/tcg/aarch64/tcg-target.c.inc b/tcg/aarch64/tcg-target.c.inc
index fc551a3d10..3adc5fd3a3 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 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;
--
2.34.1
- [PATCH v3 09/57] tcg: Unify helper_{be,le}_{ld,st}*, (continued)
- [PATCH v3 09/57] tcg: Unify helper_{be,le}_{ld,st}*, Richard Henderson, 2023/04/25
- [PATCH v3 10/57] accel/tcg: Implement helper_{ld, st}*_mmu for user-only, Richard Henderson, 2023/04/25
- [PATCH v3 12/57] tcg: Add 128-bit guest memory primitives, Richard Henderson, 2023/04/25
- [PATCH v3 11/57] tcg/tci: Use helper_{ld,st}*_mmu for user-only, Richard Henderson, 2023/04/25
- [PATCH v3 13/57] meson: Detect atomic128 support with optimization, Richard Henderson, 2023/04/25
- [PATCH v3 14/57] tcg/i386: Add have_atomic16, Richard Henderson, 2023/04/25
- [PATCH v3 15/57] accel/tcg: Use have_atomic16 in ldst_atomicity.c.inc, Richard Henderson, 2023/04/25
- [PATCH v3 16/57] accel/tcg: Add aarch64 specific support in ldst_atomicity, Richard Henderson, 2023/04/25
- [PATCH v3 17/57] tcg/aarch64: Detect have_lse, have_lse2 for linux, Richard Henderson, 2023/04/25
- [PATCH v3 21/57] tcg/i386: Use full load/store helpers in user-only mode, Richard Henderson, 2023/04/25
- [PATCH v3 18/57] tcg/aarch64: Detect have_lse, have_lse2 for darwin,
Richard Henderson <=
- [PATCH v3 20/57] tcg: Introduce TCG_OPF_TYPE_MASK, Richard Henderson, 2023/04/25
- [PATCH v3 19/57] accel/tcg: Add have_lse2 support in ldst_atomicity, Richard Henderson, 2023/04/25
- [PATCH v3 22/57] tcg/aarch64: Use full load/store helpers in user-only mode, Richard Henderson, 2023/04/25
- [PATCH v3 26/57] tcg/arm: Adjust constraints on qemu_ld/st, Richard Henderson, 2023/04/25
- [PATCH v3 23/57] tcg/ppc: Use full load/store helpers in user-only mode, Richard Henderson, 2023/04/25
- [PATCH v3 24/57] tcg/loongarch64: Use full load/store helpers in user-only mode, Richard Henderson, 2023/04/25
- [PATCH v3 25/57] tcg/riscv: Use full load/store helpers in user-only mode, Richard Henderson, 2023/04/25
- [PATCH v3 29/57] tcg/s390x: Use full load/store helpers in user-only mode, Richard Henderson, 2023/04/25
- [PATCH v3 30/57] tcg/sparc64: Allocate %g2 as a third temporary, Richard Henderson, 2023/04/25
- [PATCH v3 27/57] tcg/arm: Use full load/store helpers in user-only mode, Richard Henderson, 2023/04/25