[PATCH 05/14] libxl/arm: Construct ACPI GTDT table

[Shannon Zhao <zhaoshenglong@huawei.com>]

From: Shannon Zhao <shannon.zhao@linaro.org>

Construct GTDT table with the interrupt information of timers.

Signed-off-by: Shannon Zhao <shannon.zhao@linaro.org>
---
 tools/libxl/libxl_arm.c | 75 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 74 insertions(+), 1 deletion(-)

diff --git a/tools/libxl/libxl_arm.c b/tools/libxl/libxl_arm.c
index 9e99159..0fb4f69 100644
--- a/tools/libxl/libxl_arm.c
+++ b/tools/libxl/libxl_arm.c
@@ -3,6 +3,7 @@
 #include "libxl_libfdt_compat.h"
 
 #include <xc_dom.h>
+#include <acpi_defs.h>
 #include <stdbool.h>
 #include <libfdt.h>
 #include <assert.h>
@@ -880,13 +881,85 @@ out:
     return rc;
 }
 
+static void make_acpi_header(struct acpi_table_header *h, const char *sig,
+                             int len, uint8_t rev)
+{
+    memcpy(&h->signature, sig, 4);
+    h->length = len;
+    h->revision = rev;
+    memcpy(h->oem_id, ACPI_BUILD_APPNAME6, 6);
+    memcpy(h->oem_table_id, ACPI_BUILD_APPNAME4, 4);
+    memcpy(h->oem_table_id + 4, sig, 4);
+    h->oem_revision = 1;
+    memcpy(h->asl_compiler_id, ACPI_BUILD_APPNAME4, 4);
+    h->asl_compiler_revision = 1;
+    h->checksum = 0;
+}
+
+static void make_acpi_gtdt(libxl__gc *gc, struct xc_dom_image *dom)
+{
+    struct acpi_gtdt_descriptor *gtdt;
+
+    gtdt = libxl__zalloc(gc, sizeof(*gtdt));
+
+    gtdt->secure_el1_interrupt = GUEST_TIMER_PHYS_S_PPI;
+    gtdt->secure_el1_flags = (ACPI_LEVEL_SENSITIVE << ACPI_GTDT_INTERRUPT_MODE)
+                             |(ACPI_ACTIVE_LOW << ACPI_GTDT_INTERRUPT_POLARITY);
+    gtdt->non_secure_el1_interrupt = GUEST_TIMER_PHYS_NS_PPI;
+    gtdt->non_secure_el1_flags =
+                             (ACPI_LEVEL_SENSITIVE << ACPI_GTDT_INTERRUPT_MODE)
+                             |(ACPI_ACTIVE_LOW << ACPI_GTDT_INTERRUPT_POLARITY);
+    gtdt->virtual_timer_interrupt = GUEST_TIMER_VIRT_PPI;
+    gtdt->virtual_timer_flags =
+                             (ACPI_LEVEL_SENSITIVE << ACPI_GTDT_INTERRUPT_MODE)
+                             |(ACPI_ACTIVE_LOW << ACPI_GTDT_INTERRUPT_POLARITY);
+
+    make_acpi_header(&gtdt->header, "GTDT", sizeof(*gtdt), 2);
+
+    dom->acpitable_blob->gtdt.table = (void *)gtdt;
+    /* Align to 64bit. */
+    dom->acpitable_blob->gtdt.size = sizeof(*gtdt);
+    dom->acpitable_size += dom->acpitable_blob->gtdt.size;
+}
+
+static int 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;
+
+    /* convenience aliases */
+    xc_domain_configuration_t *xc_config = &state->config;
+
+    vers = libxl_get_version_info(CTX);
+    if (vers == NULL)
+        return ERROR_FAIL;
+
+    LOG(DEBUG, "constructing ACPI tables for Xen version %d.%d guest",
+        vers->xen_version_major, vers->xen_version_minor);
+
+    /* Alloc memory for ACPI blob placeholders. */
+    dom->acpitable_blob = libxl__zalloc(gc, sizeof(struct acpitable_blob));
+    dom->acpitable_size = 0;
+
+    make_acpi_gtdt(gc, dom);
+
+    return 0;
+}
+
 int libxl__arch_domain_init_hw_description(libxl__gc *gc,
                                            libxl_domain_build_info *info,
                                            libxl__domain_build_state *state,
                                            struct xc_dom_image *dom)
 {
+    int rc;
+
     assert(info->type == LIBXL_DOMAIN_TYPE_PV);
-    return prepare_dtb(gc, info, state, dom);
+    rc = prepare_dtb(gc, info, state, dom);
+    if (rc)
+        return rc;
+
+    return prepare_acpi(gc, info, state, dom);
 }
 
 static void finalise_one_memory_node(libxl__gc *gc, void *fdt,
-- 
2.0.4



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