x86: acpi: _DSM: use Package to pass parameters
Numer of possible arguments to pass to a method is limited in ACPI. The following patches will need to pass over more parameters to PDSM method, will hit that limit. Prepare for this by passing structure (Package) to method, which let us workaround arguments limitation. Pass to PDSM all standard arguments of _DSM as is, and pack custom parameters into Package that is passed as the last argument to PDSM. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Message-Id: <20220701133515.137890-7-imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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@ -431,11 +431,17 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus,
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);
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aml_append(dev, method);
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method = aml_method("_DSM", 4, AML_SERIALIZED);
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aml_append(method,
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aml_return(aml_call6("PDSM", aml_arg(0), aml_arg(1),
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aml_arg(2), aml_arg(3),
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aml_name("BSEL"), aml_name("_SUN")))
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);
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{
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Aml *params = aml_local(0);
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Aml *pkg = aml_package(2);
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aml_append(pkg, aml_name("BSEL"));
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aml_append(pkg, aml_name("_SUN"));
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aml_append(method, aml_store(pkg, params));
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aml_append(method,
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aml_return(aml_call5("PDSM", aml_arg(0), aml_arg(1),
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aml_arg(2), aml_arg(3), params))
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);
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}
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aml_append(dev, method);
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aml_append(parent_scope, dev);
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@ -480,10 +486,17 @@ static void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus,
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*/
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aml_append(dev, aml_name_decl("ASUN", aml_int(slot)));
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method = aml_method("_DSM", 4, AML_SERIALIZED);
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aml_append(method, aml_return(
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aml_call6("PDSM", aml_arg(0), aml_arg(1), aml_arg(2),
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aml_arg(3), aml_name("BSEL"), aml_name("ASUN"))
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));
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{
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Aml *params = aml_local(0);
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Aml *pkg = aml_package(2);
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aml_append(pkg, aml_name("BSEL"));
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aml_append(pkg, aml_name("ASUN"));
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aml_append(method, aml_store(pkg, params));
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aml_append(method, aml_return(
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aml_call5("PDSM", aml_arg(0), aml_arg(1), aml_arg(2),
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aml_arg(3), params)
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));
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}
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aml_append(dev, method);
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}
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@ -580,12 +593,13 @@ Aml *aml_pci_device_dsm(void)
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Aml *acpi_index = aml_local(2);
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Aml *zero = aml_int(0);
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Aml *one = aml_int(1);
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Aml *bnum = aml_arg(4);
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Aml *func = aml_arg(2);
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Aml *rev = aml_arg(1);
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Aml *sunum = aml_arg(5);
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Aml *params = aml_arg(4);
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Aml *bnum = aml_derefof(aml_index(params, aml_int(0)));
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Aml *sunum = aml_derefof(aml_index(params, aml_int(1)));
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method = aml_method("PDSM", 6, AML_SERIALIZED);
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method = aml_method("PDSM", 5, AML_SERIALIZED);
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/* get supported functions */
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ifctx = aml_if(aml_equal(func, zero));
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@ -662,10 +676,10 @@ Aml *aml_pci_device_dsm(void)
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* update acpi-index to actual value
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*/
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aml_append(ifctx, aml_store(acpi_index, aml_index(ret, zero)));
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aml_append(ifctx, aml_return(ret));
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}
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aml_append(method, ifctx);
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aml_append(method, aml_return(ret));
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return method;
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}
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