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microvm: make pcie irq base runtime changeable

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Allows to move them in case we have enough
irq lines available.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Message-id: 20201203105423.10431-6-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2020-12-03 11:54:16 +01:00
parent c214a7bcb6
commit 3d09c00704
2 changed files with 7 additions and 6 deletions
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11
hw/i386/microvm.c
View file

@ -181,6 +181,7 @@ static void microvm_devices_init(MicrovmMachineState *mms)
mms->virtio_irq_base = 5;
mms->virtio_num_transports = 8;
if (x86_machine_is_acpi_enabled(x86ms)) {
mms->pcie_irq_base = 12;
mms->virtio_irq_base = 16;
}
@ -226,12 +227,12 @@ static void microvm_devices_init(MicrovmMachineState *mms)
mms->gpex.mmio32.size = PCIE_MMIO_SIZE;
mms->gpex.ecam.base = PCIE_ECAM_BASE;
mms->gpex.ecam.size = PCIE_ECAM_SIZE;
mms->gpex.irq = PCIE_IRQ_BASE;
mms->gpex.irq = mms->pcie_irq_base;
create_gpex(mms);
x86ms->pci_irq_mask = ((1 << (PCIE_IRQ_BASE + 0)) |
(1 << (PCIE_IRQ_BASE + 1)) |
(1 << (PCIE_IRQ_BASE + 2)) |
(1 << (PCIE_IRQ_BASE + 3)));
x86ms->pci_irq_mask = ((1 << (mms->pcie_irq_base + 0)) |
(1 << (mms->pcie_irq_base + 1)) |
(1 << (mms->pcie_irq_base + 2)) |
(1 << (mms->pcie_irq_base + 3)));
} else {
x86ms->pci_irq_mask = 0;
}

2
include/hw/i386/microvm.h
View file

@ -66,7 +66,6 @@
#define PCIE_MMIO_SIZE 0x20000000
#define PCIE_ECAM_BASE 0xe0000000
#define PCIE_ECAM_SIZE 0x10000000
#define PCIE_IRQ_BASE 12
/* Machine type options */
#define MICROVM_MACHINE_PIT "pit"
@ -96,6 +95,7 @@ struct MicrovmMachineState {
bool auto_kernel_cmdline;
/* Machine state */
uint32_t pcie_irq_base;
uint32_t virtio_irq_base;
uint32_t virtio_num_transports;
bool kernel_cmdline_fixed;