On Mon, 16 Jun 2025 11:46:33 +0200
Eric Auger <eric.au...@redhat.com> wrote:
> Add a new argument to acpi_dsdt_add_pci_osc to be able to disable
> native pci hotplug.
>
> Signed-off-by: Eric Auger <eric.au...@redhat.com>
> Reviewed-by: Gustavo Romero <gustavo.rom...@linaro.org>
> Reviewed-by: Igor Mammedov <imamm...@redhat.com>
After discussion on earlier version I'm now fine with this.
Reviewed-by: Jonathan Cameron <jonathan.came...@huawei.com>
>
> ---
>
> rfc -> v1:
> - updated the "Allow OS control for all 5 features" comment
> ---
> hw/pci-host/gpex-acpi.c | 15 ++++++++-------
> 1 file changed, 8 insertions(+), 7 deletions(-)
>
> diff --git a/hw/pci-host/gpex-acpi.c b/hw/pci-host/gpex-acpi.c
> index 0aba47c71c..f34b7cf25e 100644
> --- a/hw/pci-host/gpex-acpi.c
> +++ b/hw/pci-host/gpex-acpi.c
> @@ -50,7 +50,7 @@ static void acpi_dsdt_add_pci_route_table(Aml *dev,
> uint32_t irq,
> }
> }
>
> -static void acpi_dsdt_add_pci_osc(Aml *dev)
> +static void acpi_dsdt_add_pci_osc(Aml *dev, bool enable_native_pcie_hotplug)
> {
> Aml *method, *UUID, *ifctx, *ifctx1, *elsectx, *buf;
>
> @@ -77,11 +77,12 @@ static void acpi_dsdt_add_pci_osc(Aml *dev)
> aml_append(ifctx, aml_store(aml_name("CDW3"), aml_name("CTRL")));
>
> /*
> - * Allow OS control for all 5 features:
> - * PCIeHotplug SHPCHotplug PME AER PCIeCapability.
> + * Allow OS control for SHPCHotplug, PME, AER, PCIeCapability,
> + * and PCIeHotplug depending on enable_native_pcie_hotplug
> */
> - aml_append(ifctx, aml_and(aml_name("CTRL"), aml_int(0x1F),
> - aml_name("CTRL")));
> + aml_append(ifctx, aml_and(aml_name("CTRL"),
> + aml_int(0x1E | (enable_native_pcie_hotplug ? 0x1 : 0x0)),
> + aml_name("CTRL")));
>
> ifctx1 = aml_if(aml_lnot(aml_equal(aml_arg(1), aml_int(0x1))));
> aml_append(ifctx1, aml_or(aml_name("CDW1"), aml_int(0x08),
> @@ -192,7 +193,7 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig
> *cfg)
> if (is_cxl) {
> build_cxl_osc_method(dev);
> } else {
> - acpi_dsdt_add_pci_osc(dev);
> + acpi_dsdt_add_pci_osc(dev, true);
> }
>
> aml_append(scope, dev);
> @@ -267,7 +268,7 @@ void acpi_dsdt_add_gpex(Aml *scope, struct GPEXConfig
> *cfg)
> }
> aml_append(dev, aml_name_decl("_CRS", rbuf));
>
> - acpi_dsdt_add_pci_osc(dev);
> + acpi_dsdt_add_pci_osc(dev, true);
>
> Aml *dev_res0 = aml_device("%s", "RES0");
> aml_append(dev_res0, aml_name_decl("_HID", aml_string("PNP0C02")));
