Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 45 insertions, 0 deletions

diff --git a/linux-user/mips/target_syscall.h b/linux-user/mips/target_syscall.h
new file mode 100644
index 000000000..f59057493
--- /dev/null
+++ b/linux-user/mips/target_syscall.h
@@ -0,0 +1,45 @@
+#ifndef MIPS_TARGET_SYSCALL_H
+#define MIPS_TARGET_SYSCALL_H
+
+/* this struct defines the way the registers are stored on the
+   stack during a system call. */
+
+struct target_pt_regs {
+	/* Pad bytes for argument save space on the stack. */
+	abi_ulong pad0[6];
+
+	/* Saved main processor registers. */
+	abi_ulong regs[32];
+
+	/* Saved special registers. */
+	abi_ulong cp0_status;
+	abi_ulong lo;
+	abi_ulong hi;
+	abi_ulong cp0_badvaddr;
+	abi_ulong cp0_cause;
+	abi_ulong cp0_epc;
+};
+
+#define UNAME_MACHINE "mips"
+#define UNAME_MINIMUM_RELEASE "2.6.32"
+
+#define TARGET_CLONE_BACKWARDS
+#define TARGET_MINSIGSTKSZ 2048
+#define TARGET_MCL_CURRENT 1
+#define TARGET_MCL_FUTURE  2
+#define TARGET_MCL_ONFAULT 4
+
+#define TARGET_FORCE_SHMLBA
+
+static inline abi_ulong target_shmlba(CPUMIPSState *env)
+{
+    return 0x40000;
+}
+
+/* MIPS-specific prctl() options */
+#define TARGET_PR_SET_FP_MODE  45
+#define TARGET_PR_GET_FP_MODE  46
+#define TARGET_PR_FP_MODE_FR   (1 << 0)
+#define TARGET_PR_FP_MODE_FRE  (1 << 1)
+
+#endif /* MIPS_TARGET_SYSCALL_H */