diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/i386/acpi-build.c | 33 |
1 files changed, 23 insertions, 10 deletions
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 733b8f0851..1311a0d4f3 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -654,6 +654,7 @@ static Aml *aml_pci_pdsm(void) Aml *acpi_index = aml_local(2); Aml *zero = aml_int(0); Aml *one = aml_int(1); + Aml *not_supp = aml_int(0xFFFFFFFF); Aml *func = aml_arg(2); Aml *params = aml_arg(4); Aml *bnum = aml_derefof(aml_index(params, aml_int(0))); @@ -678,7 +679,7 @@ static Aml *aml_pci_pdsm(void) */ ifctx1 = aml_if(aml_lnot( aml_or(aml_equal(acpi_index, zero), - aml_equal(acpi_index, aml_int(0xFFFFFFFF)), NULL) + aml_equal(acpi_index, not_supp), NULL) )); { /* have supported functions */ @@ -704,18 +705,30 @@ static Aml *aml_pci_pdsm(void) { Aml *pkg = aml_package(2); - aml_append(pkg, zero); - /* - * optional, if not impl. should return null string - */ - aml_append(pkg, aml_string("%s", "")); - aml_append(ifctx, aml_store(pkg, ret)); - aml_append(ifctx, aml_store(aml_call2("AIDX", bnum, sunum), acpi_index)); + aml_append(ifctx, aml_store(pkg, ret)); /* - * update acpi-index to actual value + * Windows calls func=7 without checking if it's available, + * as workaround Microsoft has suggested to return invalid for func7 + * Package, so return 2 elements package but only initialize elements + * when acpi_index is supported and leave them uninitialized, which + * leads elements to being Uninitialized ObjectType and should trip + * Windows into discarding result as an unexpected and prevent setting + * bogus 'PCI Label' on the device. */ - aml_append(ifctx, aml_store(acpi_index, aml_index(ret, zero))); + ifctx1 = aml_if(aml_lnot(aml_lor( + aml_equal(acpi_index, zero), aml_equal(acpi_index, not_supp) + ))); + { + aml_append(ifctx1, aml_store(acpi_index, aml_index(ret, zero))); + /* + * optional, if not impl. should return null string + */ + aml_append(ifctx1, aml_store(aml_string("%s", ""), + aml_index(ret, one))); + } + aml_append(ifctx, ifctx1); + aml_append(ifctx, aml_return(ret)); } |