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[RFC v2 1/2] hw/pci-host/gpex: Allow to generate preserve boot config DS
From: |
Eric Auger |
Subject: |
[RFC v2 1/2] hw/pci-host/gpex: Allow to generate preserve boot config DSM #5 |
Date: |
Tue, 5 Oct 2021 10:53:12 +0200 |
Add a 'preserve_config' field in struct GPEXConfig and
if set generate the DSM #5 for preserving PCI boot configurations.
The DSM presence is needed to expose RMRs.
At the moment the DSM generation is not yet enabled.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
include/hw/pci-host/gpex.h | 1 +
hw/pci-host/gpex-acpi.c | 12 ++++++++++++
2 files changed, 13 insertions(+)
diff --git a/include/hw/pci-host/gpex.h b/include/hw/pci-host/gpex.h
index fcf8b63820..3f8f8ec38d 100644
--- a/include/hw/pci-host/gpex.h
+++ b/include/hw/pci-host/gpex.h
@@ -64,6 +64,7 @@ struct GPEXConfig {
MemMapEntry pio;
int irq;
PCIBus *bus;
+ bool preserve_config;
};
int gpex_set_irq_num(GPEXHost *s, int index, int gsi);
diff --git a/hw/pci-host/gpex-acpi.c b/hw/pci-host/gpex-acpi.c
index e7e162a00a..7dab259379 100644
--- a/hw/pci-host/gpex-acpi.c
+++ b/hw/pci-host/gpex-acpi.c
@@ -164,6 +164,12 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
aml_append(dev, aml_name_decl("_PXM", aml_int(numa_node)));
}
+ if (cfg->preserve_config) {
+ method = aml_method("_DSM", 5, AML_SERIALIZED);
+ aml_append(method, aml_return(aml_int(0)));
+ aml_append(dev, method);
+ }
+
acpi_dsdt_add_pci_route_table(dev, cfg->irq);
/*
@@ -191,6 +197,12 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig *cfg)
aml_append(dev, aml_name_decl("_STR", aml_unicode("PCIe 0 Device")));
aml_append(dev, aml_name_decl("_CCA", aml_int(1)));
+ if (cfg->preserve_config) {
+ method = aml_method("_DSM", 5, AML_SERIALIZED);
+ aml_append(method, aml_return(aml_int(0)));
+ aml_append(dev, method);
+ }
+
acpi_dsdt_add_pci_route_table(dev, cfg->irq);
method = aml_method("_CBA", 0, AML_NOTSERIALIZED);
--
2.26.3