[Xen-devel] [PATCH v2 09/17] libxl/arm: Construct ACPI MADT table

[Shannon Zhao <zhaoshenglong@xxxxxxxxxx>]

From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>

According to the GIC version, construct the MADT table.

Signed-off-by: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
---
 tools/libxl/libxl_arm_acpi.c | 100 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 100 insertions(+)

diff --git a/tools/libxl/libxl_arm_acpi.c b/tools/libxl/libxl_arm_acpi.c
index de863f4..659dbfa 100644
--- a/tools/libxl/libxl_arm_acpi.c
+++ b/tools/libxl/libxl_arm_acpi.c
@@ -42,6 +42,8 @@ typedef uint64_t u64;
 #define ACPI_LEVEL_SENSITIVE            (u8) 0x00
 #define ACPI_ACTIVE_LOW                 (u8) 0x01
 
+#define ACPI_GICC_ENABLED 1
+
 enum {
     RSDP,
     XSDT,
@@ -137,6 +139,101 @@ static void make_acpi_gtdt(libxl__gc *gc, struct 
xc_dom_image *dom)
     dom->acpitable_size += ROUNDUP(acpitables[GTDT].size, 3);
 }
 
+static void make_acpi_madt_gicc(void *table, int nr_cpus, uint64_t gicc_base)
+{
+    uint32_t i;
+    struct acpi_madt_generic_interrupt *gicc = table;
+
+    for (i = 0; i < nr_cpus; i++) {
+        gicc->header.type = ACPI_MADT_TYPE_GENERIC_INTERRUPT;
+        gicc->header.length = sizeof(*gicc);
+        gicc->base_address = gicc_base;
+        gicc->cpu_interface_number = i;
+        gicc->arm_mpidr = libxl__compute_mpdir(i);
+        gicc->uid = i;
+        gicc->flags = ACPI_GICC_ENABLED;
+        gicc++;
+    }
+}
+
+static void make_acpi_madt_gicd(void *table, uint64_t gicd_base,
+                                uint8_t gic_version)
+{
+    struct acpi_madt_generic_distributor *gicd = table;
+
+    gicd->header.type = ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR;
+    gicd->header.length = sizeof(*gicd);
+    gicd->base_address = gicd_base;
+    /* This version filed has no meaning before ACPI 5.1 errata. */
+    gicd->version = gic_version;
+}
+
+static void make_acpi_madt_gicr(void *table, uint64_t gicr_base,
+                                uint64_t gicr_size)
+{
+    struct acpi_madt_generic_redistributor *gicr = table;
+
+    gicr->header.type = ACPI_MADT_TYPE_GENERIC_REDISTRIBUTOR;
+    gicr->header.length = sizeof(*gicr);
+    gicr->base_address = gicr_base;
+    gicr->length = gicr_size;
+}
+
+static int make_acpi_madt(libxl__gc *gc, struct xc_dom_image *dom, int nr_cpus,
+                          xc_domain_configuration_t *xc_config)
+{
+    size_t size;
+    void *table;
+    struct acpi_table_madt *madt;
+
+    switch (xc_config->gic_version) {
+    case XEN_DOMCTL_CONFIG_GIC_V2:
+        size = sizeof(struct acpi_table_madt) +
+               sizeof(struct acpi_madt_generic_interrupt) * nr_cpus +
+               sizeof(struct acpi_madt_generic_distributor);
+        table = libxl__zalloc(gc, size);
+        madt = (struct acpi_table_madt *)table;
+
+        table += sizeof(struct acpi_table_madt);
+        make_acpi_madt_gicc(table, nr_cpus, GUEST_GICC_BASE);
+
+        table += sizeof(struct acpi_madt_generic_interrupt) * nr_cpus;
+        make_acpi_madt_gicd(table, GUEST_GICD_BASE, ACPI_MADT_GIC_VERSION_V2);
+        break;
+    case XEN_DOMCTL_CONFIG_GIC_V3:
+        size = sizeof(struct acpi_table_madt) +
+               sizeof(struct acpi_madt_generic_interrupt) * nr_cpus +
+               sizeof(struct acpi_madt_generic_distributor) +
+               sizeof(struct acpi_madt_generic_redistributor);
+        table = libxl__zalloc(gc, size);
+        madt = (struct acpi_table_madt *)table;
+
+        table += sizeof(struct acpi_table_madt);
+        make_acpi_madt_gicc(table, nr_cpus, 0);
+
+        table += sizeof(struct acpi_madt_generic_interrupt) * nr_cpus;
+        make_acpi_madt_gicd(table, GUEST_GICV3_GICD_BASE,
+                            ACPI_MADT_GIC_VERSION_V3);
+
+        table += sizeof(struct acpi_madt_generic_distributor);
+        make_acpi_madt_gicr(table, GUEST_GICV3_GICR0_BASE,
+                            GUEST_GICV3_GICR0_SIZE);
+        break;
+    default:
+        LOG(ERROR, "Unknown GIC version");
+        return ERROR_FAIL;
+    }
+
+    make_acpi_header(&madt->header, "APIC", size, 3);
+
+    acpitables[MADT].table = madt;
+    acpitables[MADT].size = size;
+    /* Align to 64bit. */
+    dom->acpitable_size += ROUNDUP(acpitables[MADT].size, 3);
+
+    return 0;
+}
+
 int libxl__prepare_acpi(libxl__gc *gc, libxl_domain_build_info *info,
                         libxl__domain_build_state *state,
                         struct xc_dom_image *dom)
@@ -160,6 +257,9 @@ 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);
+    rc = make_acpi_madt(gc, dom, info->max_vcpus, xc_config);
+    if (rc)
+       return rc;
 
     return 0;
 }
-- 
2.0.4



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