QcomModulePkg: Add Arm Microvisor HVC functions and SCM call to get vm data

1. Add Arm64 Microvisor HVC calls to communicate with hypervisor and
execute Linux Kernels.

2. Add scm call to get vm related data from hypervisor.

Change-Id: I3930d324034fd5dccb290d6e60ea78c474d9b574

2 files changed, 157 insertions, 1 deletions

diff --git a/QcomModulePkg/Library/BootLib/BootLib.inf b/QcomModulePkg/Library/BootLib/BootLib.inf
index ad5c6fc0ae..685d17b354 100644
--- a/QcomModulePkg/Library/BootLib/BootLib.inf
+++ b/QcomModulePkg/Library/BootLib/BootLib.inf
@@ -40,7 +40,7 @@
 	GCC:*_*_*_CC_FLAGS = $(LLVM_ENABLE_SAFESTACK) $(LLVM_SAFESTACK_USE_PTR) $(LLVM_SAFESTACK_COLORING)
 
 [BuildOptions.AARCH64]
-	GCC:*_*_*_CC_FLAGS = -O2 $(SDLLVM_COMPILE_ANALYZE) $(SDLLVM_ANALYZE_REPORT)
+	GCC:*_*_*_CC_FLAGS = -O2 $(SDLLVM_COMPILE_ANALYZE) $(SDLLVM_ANALYZE_REPORT) -Wno-asm-operand-widths
 	GCC:*_*_*_CC_FLAGS = $(UBSAN_UEFI_GCC_FLAG_UNDEFINED)
 	GCC:*_*_*_CC_FLAGS = $(UBSAN_UEFI_GCC_FLAG_ALIGNMENT)
 
@@ -66,6 +66,7 @@
 	Rtic.c
 	PartialGoods.c
 	LECmdLine.c
+	HypervisorMvCalls.c
 
 [Packages]
 	ArmPkg/ArmPkg.dec
diff --git a/QcomModulePkg/Library/BootLib/HypervisorMvCalls.c b/QcomModulePkg/Library/BootLib/HypervisorMvCalls.c
new file mode 100644
index 0000000000..8dd26fe188
--- /dev/null
+++ b/QcomModulePkg/Library/BootLib/HypervisorMvCalls.c
@@ -0,0 +1,155 @@
+/* Copyright (c) 2018, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * * Redistributions of source code must retain the above copyright
+ *  notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided
+ *  with the distribution.
+ *   * Neither the name of The Linux Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include "BootLinux.h"
+#include <Library/DebugLib.h>
+#include <Protocol/EFIScm.h>
+#include <Protocol/scm_sip_interface.h>
+#include <Library/HypervisorMvCalls.h>
+
+STATIC BOOLEAN VmEnabled = FALSE;
+STATIC HypBootInfo *HypInfo = NULL;
+
+BOOLEAN IsVmEnabled (VOID)
+{
+  return VmEnabled;
+}
+
+HypBootInfo *GetVmData (VOID)
+{
+  EFI_STATUS Status;
+  QCOM_SCM_PROTOCOL *QcomScmProtocol = NULL;
+  UINT64 Parameters[SCM_MAX_NUM_PARAMETERS] = {0};
+  UINT64 Results[SCM_MAX_NUM_RESULTS] = {0};
+
+  if (IsVmEnabled ()) {
+    return HypInfo;
+  }
+
+  DEBUG ((EFI_D_INFO, "GetVmData: making ScmCall to get HypInfo\n"));
+  /* Locate QCOM_SCM_PROTOCOL */
+  Status = gBS->LocateProtocol (&gQcomScmProtocolGuid, NULL,
+                                (VOID **)&QcomScmProtocol);
+  if (EFI_ERROR (Status)) {
+    DEBUG ((EFI_D_ERROR, "GetVmData: Locate SCM Protocol failed, "
+                         "Status: (0x%x)\n", Status));
+    return NULL;
+  }
+
+  /* Make ScmSipSysCall */
+  Status = QcomScmProtocol->ScmSipSysCall (
+      QcomScmProtocol, HYP_INFO_GET_HYP_DTB_ADDRESS_ID,
+      HYP_INFO_GET_HYP_DTB_ADDRESS_ID_PARAM_ID, Parameters, Results);
+
+  if (EFI_ERROR (Status)) {
+    DEBUG ((EFI_D_ERROR, "GetVmData: No Vm data present! "
+                         "Status = (0x%x)\n", Status));
+    return NULL;
+  }
+
+  HypInfo = (HypBootInfo *)Results[1];
+  if (!HypInfo) {
+    DEBUG ((EFI_D_ERROR, "GetVmData: ScmSipSysCall returned NULL\n"));
+    return NULL;
+  }
+  VmEnabled = TRUE;
+
+  return HypInfo;
+}
+
+/* From Linux Kernel asm/system.h */
+#define __asmeq(x, y) ".ifnc " x "," y " ; .err ; .endif\n\t"
+
+/**
+ *
+ * Control a pipe, including reset, ready and halt functionality.
+ *
+ * @param pipe_id
+ *    The capability identifier of the pipe.
+ * @param control
+ *    The state control argument.
+ *
+ * @retval error
+ *    The returned error code.
+ *
+ */
+UINT32 HvcSysPipeControl (UINT32 PipeId, UINT32 Control)
+{
+#if TARGET_ARCH_ARM64
+    register UINT32 x0 __asm__ ("x0") = (UINT32) PipeId;
+    register UINT32 x1 __asm__ ("x1") = (UINT32) Control;
+    __asm__ __volatile__ (
+        __asmeq ("%0", "x0")
+        __asmeq ("%1", "x1")
+        "hvc #5146 \n\t"
+        : "+r" (x0), "+r" (x1)
+        :
+        : "cc", "memory", "x2", "x3", "x4", "x5"
+        );
+
+    return (UINT32)x0;
+#endif
+    return 0;
+}
+
+/**
+ *
+ * Send a message to a microvisor pipe.
+ *
+ * @param pipe_id
+ *    The capability identifier of the pipe.
+ * @param size
+ *    Size of the message to send.
+ * @param data
+ *    Pointer to the message payload to send.
+ *
+ * @retval error
+ *    The returned error code.
+ *
+ */
+UINT32 HvcSysPipeSend (UINT32 PipeId, UINT32 Size, CONST UINT8 *Data)
+{
+#if TARGET_ARCH_ARM64
+    register UINT32 x0 __asm__ ("x0") = (UINT32) PipeId;
+    register UINT32 x1 __asm__ ("x1") = (UINT32) Size;
+    register UINT32 x2 __asm__ ("x2") = (UINT32)(UINTN) Data;
+    __asm__ __volatile__ (
+        __asmeq ("%0", "x0")
+        __asmeq ("%1", "x1")
+        __asmeq ("%2", "x2")
+        "hvc #5148 \n\t"
+        : "+r" (x0), "+r" (x1), "+r" (x2)
+        :
+        : "cc", "memory", "x3", "x4", "x5"
+        );
+
+
+    return (UINT32)x0;
+#endif
+    return 0;
+}