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, 33 insertions, 6 deletions

diff --git a/target/i386/cpu.h b/target/i386/cpu.h
index d605cc6ccb..de9d74acaf 100644
--- a/target/i386/cpu.h
+++ b/target/i386/cpu.h
@@ -30,6 +30,8 @@
 #define TARGET_LONG_BITS 32
 #endif
 
+#include "exec/cpu-defs.h"
+
 /* The x86 has a strong memory model with some store-after-load re-ordering */
 #define TCG_GUEST_DEFAULT_MO      (TCG_MO_ALL & ~TCG_MO_ST_LD)
 
@@ -50,8 +52,6 @@
 
 #define CPUArchState struct CPUX86State
 
-#include "exec/cpu-defs.h"
-
 #ifdef CONFIG_TCG
 #include "fpu/softfloat.h"
 #endif
@@ -82,16 +82,20 @@
 #define R_GS 5
 
 /* segment descriptor fields */
-#define DESC_G_MASK     (1 << 23)
+#define DESC_G_SHIFT    23
+#define DESC_G_MASK     (1 << DESC_G_SHIFT)
 #define DESC_B_SHIFT    22
 #define DESC_B_MASK     (1 << DESC_B_SHIFT)
 #define DESC_L_SHIFT    21 /* x86_64 only : 64 bit code segment */
 #define DESC_L_MASK     (1 << DESC_L_SHIFT)
-#define DESC_AVL_MASK   (1 << 20)
-#define DESC_P_MASK     (1 << 15)
+#define DESC_AVL_SHIFT  20
+#define DESC_AVL_MASK   (1 << DESC_AVL_SHIFT)
+#define DESC_P_SHIFT    15
+#define DESC_P_MASK     (1 << DESC_P_SHIFT)
 #define DESC_DPL_SHIFT  13
 #define DESC_DPL_MASK   (3 << DESC_DPL_SHIFT)
-#define DESC_S_MASK     (1 << 12)
+#define DESC_S_SHIFT    12
+#define DESC_S_MASK     (1 << DESC_S_SHIFT)
 #define DESC_TYPE_SHIFT 8
 #define DESC_TYPE_MASK  (15 << DESC_TYPE_SHIFT)
 #define DESC_A_MASK     (1 << 8)
@@ -631,6 +635,7 @@ typedef uint32_t FeatureWordArray[FEATURE_WORDS];
 #define CPUID_7_0_EBX_AVX512BW (1U << 30) /* AVX-512 Byte and Word Instructions */
 #define CPUID_7_0_EBX_AVX512VL (1U << 31) /* AVX-512 Vector Length Extensions */
 
+#define CPUID_7_0_ECX_AVX512BMI (1U << 1)
 #define CPUID_7_0_ECX_VBMI     (1U << 1)  /* AVX-512 Vector Byte Manipulation Instrs */
 #define CPUID_7_0_ECX_UMIP     (1U << 2)
 #define CPUID_7_0_ECX_PKU      (1U << 3)
@@ -812,6 +817,20 @@ typedef struct SegmentCache {
         float64  _d_##n[(bits)/64]; \
     }
 
+typedef union {
+    uint8_t _b[16];
+    uint16_t _w[8];
+    uint32_t _l[4];
+    uint64_t _q[2];
+} XMMReg;
+
+typedef union {
+    uint8_t _b[32];
+    uint16_t _w[16];
+    uint32_t _l[8];
+    uint64_t _q[4];
+} YMMReg;
+
 typedef MMREG_UNION(ZMMReg, 512) ZMMReg;
 typedef MMREG_UNION(MMXReg, 64)  MMXReg;
 
@@ -1047,7 +1066,11 @@ typedef struct CPUX86State {
     ZMMReg xmm_t0;
     MMXReg mmx_t0;
 
+    XMMReg ymmh_regs[CPU_NB_REGS];
+
     uint64_t opmask_regs[NB_OPMASK_REGS];
+    YMMReg zmmh_regs[CPU_NB_REGS];
+    ZMMReg hi16_zmm_regs[CPU_NB_REGS];
 
     /* sysenter registers */
     uint32_t sysenter_cs;
@@ -1172,11 +1195,15 @@ typedef struct CPUX86State {
     int32_t interrupt_injected;
     uint8_t soft_interrupt;
     uint8_t has_error_code;
+    uint32_t ins_len;
     uint32_t sipi_vector;
     bool tsc_valid;
     int64_t tsc_khz;
     int64_t user_tsc_khz; /* for sanity check only */
     void *kvm_xsave_buf;
+#if defined(CONFIG_HVF)
+    HVFX86EmulatorState *hvf_emul;
+#endif
 
     uint64_t mcg_cap;
     uint64_t mcg_ctl;