[Xen-devel] [PATCH v2 07/17] libxl/arm: Construct ACPI GTDT table

[Shannon Zhao <zhaoshenglong@xxxxxxxxxx>]

From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

Construct GTDT table with the interrupt information of timers.

Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
 tools/libxl/libxl_arm_acpi.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/tools/libxl/libxl_arm_acpi.c b/tools/libxl/libxl_arm_acpi.c
index d5ffedf..de863f4 100644
--- a/tools/libxl/libxl_arm_acpi.c
+++ b/tools/libxl/libxl_arm_acpi.c
@@ -39,6 +39,9 @@ typedef uint64_t u64;
 #define ACPI_BUILD_APPNAME6 "XenARM"
 #define ACPI_BUILD_APPNAME4 "Xen "
 
+#define ACPI_LEVEL_SENSITIVE            (u8) 0x00
+#define ACPI_ACTIVE_LOW                 (u8) 0x01
+
 enum {
     RSDP,
     XSDT,
@@ -110,6 +113,30 @@ static void make_acpi_xsdt(libxl__gc *gc, struct 
xc_dom_image *dom)
     dom->acpitable_size += ROUNDUP(acpitables[XSDT].size, 3);
 }
 
+static void make_acpi_gtdt(libxl__gc *gc, struct xc_dom_image *dom)
+{
+    struct acpi_table_gtdt *gtdt;
+    size_t size = sizeof(*gtdt);
+
+    gtdt = libxl__zalloc(gc, size);
+
+    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", size, 2);
+
+    acpitables[GTDT].table = gtdt;
+    acpitables[GTDT].size = size;
+    /* Align to 64bit. */
+    dom->acpitable_size += ROUNDUP(acpitables[GTDT].size, 3);
+}
+
 int libxl__prepare_acpi(libxl__gc *gc, libxl_domain_build_info *info,
                         libxl__domain_build_state *state,
                         struct xc_dom_image *dom)
@@ -132,6 +159,7 @@ int libxl__prepare_acpi(libxl__gc *gc, 
libxl_domain_build_info *info,
 
     make_acpi_rsdp(gc, dom);
     make_acpi_xsdt(gc, dom);
+    make_acpi_gtdt(gc, dom);
 
     return 0;
 }
-- 
2.0.4



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