[Xen-devel] [PATCH v4 02/16] libxl/arm: prepare for constructing ACPI tables

[Shannon Zhao <zhaoshenglong@xxxxxxxxxx>]

From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

It only constructs the ACPI tables for 64-bit ARM DomU when user enables
acpi because 32-bit DomU doesn't support ACPI.

Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
 tools/libxl/Makefile          |  4 +++
 tools/libxl/libxl_arm.c       | 23 +++++++++++++++-
 tools/libxl/libxl_arm.h       | 44 +++++++++++++++++++++++++++++++
 tools/libxl/libxl_arm_acpi.c  | 61 +++++++++++++++++++++++++++++++++++++++++++
 xen/include/public/arch-arm.h |  4 +++
 5 files changed, 135 insertions(+), 1 deletion(-)
 create mode 100644 tools/libxl/libxl_arm.h
 create mode 100644 tools/libxl/libxl_arm_acpi.c

diff --git a/tools/libxl/Makefile b/tools/libxl/Makefile
index a148374..6139bed 100644
--- a/tools/libxl/Makefile
+++ b/tools/libxl/Makefile
@@ -90,6 +90,10 @@ acpi:
 
 LIBXL_OBJS-$(CONFIG_X86) += libxl_cpuid.o libxl_x86.o libxl_psr.o 
libxl_x86_acpi.o
 LIBXL_OBJS-$(CONFIG_ARM) += libxl_nocpuid.o libxl_arm.o libxl_libfdt_compat.o
+LIBXL_OBJS-$(CONFIG_ARM_64) += libxl_arm_acpi.o
+
+libxl_arm_acpi.o: libxl_arm_acpi.c
+       $(CC) -c $(CFLAGS) -I../../xen/include/ -o $@ libxl_arm_acpi.c
 
 ifeq ($(CONFIG_NetBSD),y)
 LIBXL_OBJS-y += libxl_netbsd.o
diff --git a/tools/libxl/libxl_arm.c b/tools/libxl/libxl_arm.c
index bd3d611..8c7fc09 100644
--- a/tools/libxl/libxl_arm.c
+++ b/tools/libxl/libxl_arm.c
@@ -1,6 +1,7 @@
 #include "libxl_internal.h"
 #include "libxl_arch.h"
 #include "libxl_libfdt_compat.h"
+#include "libxl_arm.h"
 
 #include <xc_dom.h>
 #include <stdbool.h>
@@ -885,8 +886,28 @@ int libxl__arch_domain_init_hw_description(libxl__gc *gc,
                                            libxl__domain_build_state *state,
                                            struct xc_dom_image *dom)
 {
+    int rc;
+
     assert(info->type == LIBXL_DOMAIN_TYPE_PV);
-    return libxl__prepare_dtb(gc, info, state, dom);
+    rc = libxl__prepare_dtb(gc, info, state, dom);
+    if (rc) goto out;
+
+    if (!libxl_defbool_val(info->acpi)) {
+        LOG(DEBUG, "Generating ACPI tables is disabled by user.");
+        rc = 0;
+        goto out;
+    }
+
+    if (strcmp(dom->guest_type, "xen-3.0-aarch64")) {
+        LOG(ERROR, "Can not enable libxl option 'acpi' for %s", 
dom->guest_type);
+        rc = ERROR_FAIL;
+        goto out;
+    }
+
+    rc = libxl__prepare_acpi(gc, info, state, dom);
+
+out:
+    return rc;
 }
 
 static void finalise_one_memory_node(libxl__gc *gc, void *fdt,
diff --git a/tools/libxl/libxl_arm.h b/tools/libxl/libxl_arm.h
new file mode 100644
index 0000000..fe1c05f
--- /dev/null
+++ b/tools/libxl/libxl_arm.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2016      Linaro Ltd.
+ *
+ * Author: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file 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 Lesser General Public License for more details.
+ */
+
+#include "libxl_internal.h"
+#include "libxl_arch.h"
+
+#include <xc_dom.h>
+
+#if defined(__aarch64__)
+_hidden
+int libxl__prepare_acpi(libxl__gc *gc, libxl_domain_build_info *info,
+                        libxl__domain_build_state *state,
+                        struct xc_dom_image *dom);
+#else
+_hidden
+static inline int libxl__prepare_acpi(libxl__gc *gc,
+                                      libxl_domain_build_info *info,
+                                      libxl__domain_build_state *state,
+                                      struct xc_dom_image *dom)
+{
+    return 0;
+}
+#endif
+
+/*
+ * Local variables:
+ * mode: C
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/tools/libxl/libxl_arm_acpi.c b/tools/libxl/libxl_arm_acpi.c
new file mode 100644
index 0000000..ec6cf08
--- /dev/null
+++ b/tools/libxl/libxl_arm_acpi.c
@@ -0,0 +1,61 @@
+/*
+ * ARM DomU ACPI generation
+ *
+ * Copyright (C) 2016      Linaro Ltd.
+ *
+ * Author: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; version 2.1 only. with the special
+ * exception on linking described in file 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 Lesser General Public License for more details.
+ */
+
+#include "libxl_arm.h"
+
+#include <stdint.h>
+
+typedef uint8_t u8;
+typedef uint16_t u16;
+typedef uint32_t u32;
+typedef uint64_t u64;
+
+#include <acpi/acconfig.h>
+#include <acpi/actbl.h>
+
+int libxl__prepare_acpi(libxl__gc *gc, libxl_domain_build_info *info,
+                        libxl__domain_build_state *state,
+                        struct xc_dom_image *dom)
+{
+    const libxl_version_info *vers;
+    int rc = 0;
+
+    vers = libxl_get_version_info(CTX);
+    if (vers == NULL) {
+        rc = ERROR_FAIL;
+        goto out;
+    }
+
+    LOG(DEBUG, "constructing ACPI tables for Xen version %d.%d guest",
+        vers->xen_version_major, vers->xen_version_minor);
+
+    dom->acpi_modules[0].data = NULL;
+    dom->acpi_modules[0].length = 0;
+    dom->acpi_modules[0].guest_addr_out = GUEST_ACPI_BASE;
+
+out:
+    return rc;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-basic-offset: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index 870bc3b..0afd654 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -406,6 +406,10 @@ typedef uint64_t xen_callback_t;
 #define GUEST_GICV3_GICR0_BASE     0x03020000ULL    /* vCPU0 - vCPU127 */
 #define GUEST_GICV3_GICR0_SIZE     0x01000000ULL
 
+/* ACPI tables physical address */
+#define GUEST_ACPI_BASE 0x20000000ULL
+#define GUEST_ACPI_SIZE 0x00200000ULL
+
 /*
  * 16MB == 4096 pages reserved for guest to use as a region to map its
  * grant table in.
-- 
2.0.4



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