[Qemu-devel] [PATCH for-2.6 v2 1/2] pc: acpi: tpm: add missing MMIO resource to PCI0._CRS

[Igor Mammedov <imammedo@redhat.com>]

Windows will fail initialize TMP driver with the reason:
  'device cannot find enough free resources'
That happens because parent BUS doesn't describe
MMIO resources used by TPM child device.
Fix it by describing it in top-most parent bus scope PCI0.

It was 'regressed' by commit
  5cb18b3d TPM2 ACPI table support
with following fixup
  9e472263 acpi: add missing ssdt
which did the right thing by moving TPM to BUS
it belongs to but lacked a proper resource declaration.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
---
 hw/i386/acpi-build.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 35180ef..784870e 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -2167,6 +2167,11 @@ build_dsdt(GArray *table_data, GArray *linker,
                              0, pci->w64.begin, pci->w64.end - 1, 0,
                              pci->w64.end - pci->w64.begin));
     }
+
+    if (misc->tpm_version != TPM_VERSION_UNSPEC) {
+        aml_append(crs, aml_memory32_fixed(TPM_TIS_ADDR_BASE,
+                   TPM_TIS_ADDR_SIZE, AML_READ_WRITE));
+    }
     aml_append(scope, aml_name_decl("_CRS", crs));
 
     /* reserve GPE0 block resources */
-- 
1.8.3.1