[Xen-devel] [PATCH RFC 29/35] arm : acpi enable PSCI and hvc in acpi FADT table

[parth.dixit@xxxxxxxxxx]

From: Parth Dixit <parth.dixit@xxxxxxxxxx>

Enable PSCI and hvc flags in FADT table so that dom0 uses PSCI to
boot vcpu's

Signed-off-by: Parth Dixit <parth.dixit@xxxxxxxxxx>
---
 xen/arch/arm/arm64/acpi/arm-core.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/xen/arch/arm/arm64/acpi/arm-core.c 
b/xen/arch/arm/arm64/acpi/arm-core.c
index 6707e4c..9a26202 100644
--- a/xen/arch/arm/arm64/acpi/arm-core.c
+++ b/xen/arch/arm/arm64/acpi/arm-core.c
@@ -28,6 +28,7 @@
 #include <xen/errno.h>
 #include <xen/stdbool.h>
 #include <xen/cpumask.h>
+#include <acpi/actables.h>
 
 #include <asm/cputype.h>
 #include <asm/acpi.h>
@@ -242,6 +243,19 @@ static int __init acpi_parse_fadt(struct acpi_table_header 
*table)
        return 0;
 }
 
+static void set_psci_fadt(void)
+{
+    struct acpi_table_fadt *fadt=NULL;
+    struct acpi_table_header *table=NULL;
+    u8 checksum;
+
+    acpi_get_table(ACPI_SIG_FADT, 0, &table);
+    fadt = (struct acpi_table_fadt *)table;
+    fadt->arm_boot_flags |= ( ACPI_FADT_PSCI_COMPLIANT | 
ACPI_FADT_PSCI_USE_HVC );
+    checksum = acpi_tb_checksum(ACPI_CAST_PTR(u8, fadt), fadt->header.length);
+    fadt->header.checksum = (u8)( fadt->header.checksum-checksum );
+}
+
 int acpi_map_tables(struct domain *d)
 {
     int i,res;
@@ -263,6 +277,8 @@ int acpi_map_tables(struct domain *d)
          return res;
     }
 
+    set_psci_fadt();
+
     for( i = 0; i < acpi_gbl_root_table_list.count; i++ )
     {
         addr = acpi_gbl_root_table_list.tables[i].address;
-- 
1.9.1


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