On Wed, 10 Nov 2021 06:30:11 +0100 Julia Suvorova <jus...@redhat.com> wrote:
> To solve issues [1-2] the Hot Plug Capable bit in PCIe Slots will be > turned on, while the switch to ACPI Hot-plug will be done in the > DSDT table. > > Introducing 'x-keep-native-hpc' option disables the HPC bit only > in 6.1 and as a result keeps the forced 'reserve-io' on > pcie-root-ports in 6.1 too. using property from the 1st patch (native-hotplug), should be enough to keep 6.1 ABI, so this patch is likely not needed. > > [1] https://gitlab.com/qemu-project/qemu/-/issues/641 > [2] https://bugzilla.redhat.com/show_bug.cgi?id=2006409 > > Signed-off-by: Julia Suvorova <jus...@redhat.com> > --- > include/hw/acpi/ich9.h | 1 + > hw/acpi/ich9.c | 18 ++++++++++++++++++ > hw/i386/pc.c | 2 ++ > hw/i386/pc_q35.c | 7 ++++++- > 4 files changed, 27 insertions(+), 1 deletion(-) > > diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h > index f04f1791bd..7ca92843c6 100644 > --- a/include/hw/acpi/ich9.h > +++ b/include/hw/acpi/ich9.h > @@ -56,6 +56,7 @@ typedef struct ICH9LPCPMRegs { > AcpiCpuHotplug gpe_cpu; > CPUHotplugState cpuhp_state; > > + bool keep_pci_slot_hpc; > bool use_acpi_hotplug_bridge; > AcpiPciHpState acpi_pci_hotplug; > MemHotplugState acpi_memory_hotplug; > diff --git a/hw/acpi/ich9.c b/hw/acpi/ich9.c > index 1ee2ba2c50..ebe08ed831 100644 > --- a/hw/acpi/ich9.c > +++ b/hw/acpi/ich9.c > @@ -419,6 +419,20 @@ static void ich9_pm_set_acpi_pci_hotplug(Object *obj, > bool value, Error **errp) > s->pm.use_acpi_hotplug_bridge = value; > } > > +static bool ich9_pm_get_keep_pci_slot_hpc(Object *obj, Error **errp) > +{ > + ICH9LPCState *s = ICH9_LPC_DEVICE(obj); > + > + return s->pm.keep_pci_slot_hpc; > +} > + > +static void ich9_pm_set_keep_pci_slot_hpc(Object *obj, bool value, Error > **errp) > +{ > + ICH9LPCState *s = ICH9_LPC_DEVICE(obj); > + > + s->pm.keep_pci_slot_hpc = value; > +} > + > void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm) > { > static const uint32_t gpe0_len = ICH9_PMIO_GPE0_LEN; > @@ -428,6 +442,7 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs > *pm) > pm->disable_s4 = 0; > pm->s4_val = 2; > pm->use_acpi_hotplug_bridge = true; > + pm->keep_pci_slot_hpc = true; > > object_property_add_uint32_ptr(obj, ACPI_PM_PROP_PM_IO_BASE, > &pm->pm_io_base, OBJ_PROP_FLAG_READ); > @@ -454,6 +469,9 @@ void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs > *pm) > object_property_add_bool(obj, ACPI_PM_PROP_ACPI_PCIHP_BRIDGE, > ich9_pm_get_acpi_pci_hotplug, > ich9_pm_set_acpi_pci_hotplug); > + object_property_add_bool(obj, "x-keep-pci-slot-hpc", > + ich9_pm_get_keep_pci_slot_hpc, > + ich9_pm_set_keep_pci_slot_hpc); > } > > void ich9_pm_device_pre_plug_cb(HotplugHandler *hotplug_dev, DeviceState > *dev, > diff --git a/hw/i386/pc.c b/hw/i386/pc.c > index 2592a82148..a2ef40ecbc 100644 > --- a/hw/i386/pc.c > +++ b/hw/i386/pc.c > @@ -98,6 +98,7 @@ GlobalProperty pc_compat_6_1[] = { > { TYPE_X86_CPU, "hv-version-id-build", "0x1bbc" }, > { TYPE_X86_CPU, "hv-version-id-major", "0x0006" }, > { TYPE_X86_CPU, "hv-version-id-minor", "0x0001" }, > + { "ICH9-LPC", "x-keep-pci-slot-hpc", "false" }, > }; > const size_t pc_compat_6_1_len = G_N_ELEMENTS(pc_compat_6_1); > > @@ -107,6 +108,7 @@ GlobalProperty pc_compat_6_0[] = { > { "qemu64" "-" TYPE_X86_CPU, "stepping", "3" }, > { TYPE_X86_CPU, "x-vendor-cpuid-only", "off" }, > { "ICH9-LPC", ACPI_PM_PROP_ACPI_PCIHP_BRIDGE, "off" }, > + { "ICH9-LPC", "x-keep-pci-slot-hpc", "true" }, > }; > const size_t pc_compat_6_0_len = G_N_ELEMENTS(pc_compat_6_0); > > diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c > index ded61f8ef7..06f09dfcc6 100644 > --- a/hw/i386/pc_q35.c > +++ b/hw/i386/pc_q35.c > @@ -137,6 +137,7 @@ static void pc_q35_init(MachineState *machine) > DriveInfo *hd[MAX_SATA_PORTS]; > MachineClass *mc = MACHINE_GET_CLASS(machine); > bool acpi_pcihp; > + bool keep_pci_slot_hpc; > > /* Check whether RAM fits below 4G (leaving 1/2 GByte for IO memory > * and 256 Mbytes for PCI Express Enhanced Configuration Access Mapping > @@ -242,7 +243,11 @@ static void pc_q35_init(MachineState *machine) > ACPI_PM_PROP_ACPI_PCIHP_BRIDGE, > NULL); > > - if (acpi_pcihp) { > + keep_pci_slot_hpc = object_property_get_bool(OBJECT(lpc), > + "x-keep-pci-slot-hpc", > + NULL); > + > + if (!keep_pci_slot_hpc && acpi_pcihp) { > object_register_sugar_prop(TYPE_PCIE_SLOT, "native-hpc-bit", > "false", true); > }
