i386: hvf: add code base from Google's QEMU repository

This file begins tracking the files that will be the code base for HVF
support in QEMU. This code base is part of Google's QEMU version of
their Android emulator, and can be found at
https://android.googlesource.com/platform/external/qemu/+/emu-master-dev

This code is based on Veertu Inc's vdhh (Veertu Desktop Hosted
Hypervisor), found at https://github.com/veertuinc/vdhh. Everything is
appropriately licensed under GPL v2-or-later, except for the code inside
x86_task.c and x86_task.h, which, deriving from KVM (the Linux kernel),
is licensed GPL v2-only.

This code base already implements a very great deal of functionality,
although Google's version removed from Vertuu's the support for APIC
page and hyperv-related stuff. According to the Android Emulator Release
Notes, Revision 26.1.3 (August 2017), "Hypervisor.framework is now
enabled by default on macOS for 32-bit x86 images to improve performance
and macOS compatibility", although we better use with caution for, as the
same Revision warns us, "If you experience issues with it specifically,
please file a bug report...". The code hasn't seen much update in the
last 5 months, so I think that we can further develop the code with
occasional visiting Google's repository to see if there has been any
update.

On top of Google's code, the following changes were made:

- add code to the configure script to support the --enable-hvf argument.
If the OS is Darwin, it checks for presence of HVF in the system. The
patch also adds strings related to HVF in the file qemu-options.hx.
QEMU will only support the modern syntax style '-M accel=hvf' no enable
hvf; the legacy '-enable-hvf' will not be supported.

- fix styling issues

- add glue code to cpus.c

- move HVFX86EmulatorState field to CPUX86State, changing the
the emulation functions to have a parameter with signature 'CPUX86State *'
instead of 'CPUState *' so we don't have to get the 'env'.

Signed-off-by: Sergio Andres Gomez Del Real <Sergio.G.DelReal@gmail.com>
Message-Id: <20170913090522.4022-2-Sergio.G.DelReal@gmail.com>
Message-Id: <20170913090522.4022-3-Sergio.G.DelReal@gmail.com>
Message-Id: <20170913090522.4022-5-Sergio.G.DelReal@gmail.com>
Message-Id: <20170913090522.4022-6-Sergio.G.DelReal@gmail.com>
Message-Id: <20170905035457.3753-7-Sergio.G.DelReal@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 39 insertions, 0 deletions

diff --git a/target/i386/hvf-utils/x86hvf.h b/target/i386/hvf-utils/x86hvf.h
new file mode 100644
index 0000000000..daa0b75273
--- /dev/null
+++ b/target/i386/hvf-utils/x86hvf.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2016 Veertu Inc,
+ * Copyright (C) 2017 Google Inc,
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 or
+ * (at your option) version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef X86HVF_H
+#define X86HVF_H
+#include "cpu.h"
+#include "x86_descr.h"
+
+int hvf_process_events(CPUState *);
+int hvf_put_registers(CPUState *);
+int hvf_get_registers(CPUState *);
+bool hvf_inject_interrupts(CPUState *);
+void hvf_set_segment(struct CPUState *cpu, struct vmx_segment *vmx_seg,
+                     SegmentCache *qseg, bool is_tr);
+void hvf_get_segment(SegmentCache *qseg, struct vmx_segment *vmx_seg);
+void hvf_put_xsave(CPUState *cpu_state);
+void hvf_put_segments(CPUState *cpu_state);
+void hvf_put_msrs(CPUState *cpu_state);
+void hvf_get_xsave(CPUState *cpu_state);
+void hvf_get_msrs(CPUState *cpu_state);
+void vmx_clear_int_window_exiting(CPUState *cpu);
+void hvf_get_segments(CPUState *cpu_state);
+void vmx_update_tpr(CPUState *cpu);
+void hvf_cpu_synchronize_state(CPUState *cpu_state);
+#endif