Add a trivial namespace to the fake ACPI DSDT.

This simply defines the root scope and adds a processor object.
This eliminates the last guest ACPI CA warning and you should now
have /proc/acpi/processor/CPU0 on the guest.  Patch versus current
xen-ia64-unstable.hg

Signed-off-by: Alex Williamson <alex.williamson@hp.com>

diff --git a/xen/arch/ia64/xen/dom_fw.c b/xen/arch/ia64/xen/dom_fw.c
index f725f5ff5e65add4cc7316777b42f67f3b1a1af2..7d62b3daec34632f6df4cdb1fc1b3a71790d6f2e 100644 (file)
--- a/xen/arch/ia64/xen/dom_fw.c
+++ b/xen/arch/ia64/xen/dom_fw.c
@@ -481,6 +481,7 @@ struct fake_acpi_tables {
        struct fadt_descriptor_rev2 fadt;
        struct facs_descriptor_rev2 facs;
        struct acpi_table_header dsdt;
+       u8 aml[16];
        struct acpi_table_madt madt;
        struct acpi_table_lsapic lsapic;
        u8 pm1a_evt_blk[4];
@@ -564,17 +565,26 @@ dom_fw_fake_acpi(struct fake_acpi_tables *tables)
                                                ACPI_RSDP_CHECKSUM_LENGTH);
        rsdp->ext_checksum = generate_acpi_checksum(rsdp, rsdp->length);
 
-       /*
-        * setup DSDT - ACPI generates a warning because there's no AML
-        * in the DSDT.  Revisit to add dummy AML stub.
-        */ 
+       /* setup DSDT with trivial namespace. */ 
        strncpy(dsdt->signature, DSDT_SIG, 4);
        dsdt->revision = 1;
-       dsdt->length = sizeof(struct acpi_table_header);
+       dsdt->length = sizeof(struct acpi_table_header) + sizeof(tables->aml);
        strcpy(dsdt->oem_id, "XEN");
        strcpy(dsdt->oem_table_id, "Xen/ia64");
        strcpy(dsdt->asl_compiler_id, "XEN");
        dsdt->asl_compiler_revision = (XEN_VERSION<<16)|(XEN_SUBVERSION);
+
+       /* Trivial namespace, avoids ACPI CA complaints */
+       tables->aml[0] = 0x10; /* Scope */
+       tables->aml[1] = 0x12; /* length/offset to next object */
+       strncpy(&tables->aml[2], "_SB_", 4);
+
+       /* The processor object isn't absolutely necessary, revist for SMP */
+       tables->aml[6] = 0x5b; /* processor object */
+       tables->aml[7] = 0x83;
+       tables->aml[8] = 0x0b; /* next */
+       strncpy(&tables->aml[9], "CPU0", 4);
+
        dsdt->checksum = generate_acpi_checksum(dsdt, dsdt->length);
 
        /* setup MADT */