9c11a8ac88
Every set_irq call makes a Xen hypercall. Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Alexander Graf <agraf@suse.de>
91 lines
1.9 KiB
C
91 lines
1.9 KiB
C
/*
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* Copyright (C) 2010 Citrix Ltd.
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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*/
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#include "hw/pci.h"
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#include "hw/xen_common.h"
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#include "hw/xen_backend.h"
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/* Xen specific function for piix pci */
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int xen_pci_slot_get_pirq(PCIDevice *pci_dev, int irq_num)
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{
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return irq_num + ((pci_dev->devfn >> 3) << 2);
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}
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void xen_piix3_set_irq(void *opaque, int irq_num, int level)
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{
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xc_hvm_set_pci_intx_level(xen_xc, xen_domid, 0, 0, irq_num >> 2,
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irq_num & 3, level);
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}
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void xen_piix_pci_write_config_client(uint32_t address, uint32_t val, int len)
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{
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int i;
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/* Scan for updates to PCI link routes (0x60-0x63). */
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for (i = 0; i < len; i++) {
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uint8_t v = (val >> (8 * i)) & 0xff;
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if (v & 0x80) {
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v = 0;
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}
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v &= 0xf;
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if (((address + i) >= 0x60) && ((address + i) <= 0x63)) {
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xc_hvm_set_pci_link_route(xen_xc, xen_domid, address + i - 0x60, v);
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}
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}
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}
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/* Xen Interrupt Controller */
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static void xen_set_irq(void *opaque, int irq, int level)
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{
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xc_hvm_set_isa_irq_level(xen_xc, xen_domid, irq, level);
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}
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qemu_irq *xen_interrupt_controller_init(void)
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{
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return qemu_allocate_irqs(xen_set_irq, NULL, 16);
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}
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/* VCPU Operations, MMIO, IO ring ... */
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static void xen_reset_vcpu(void *opaque)
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{
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CPUState *env = opaque;
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env->halted = 1;
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}
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void xen_vcpu_init(void)
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{
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CPUState *first_cpu;
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if ((first_cpu = qemu_get_cpu(0))) {
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qemu_register_reset(xen_reset_vcpu, first_cpu);
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xen_reset_vcpu(first_cpu);
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}
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}
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/* Initialise Xen */
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int xen_init(void)
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{
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xen_xc = xen_xc_interface_open(0, 0, 0);
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if (xen_xc == XC_HANDLER_INITIAL_VALUE) {
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xen_be_printf(NULL, 0, "can't open xen interface\n");
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return -1;
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}
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return 0;
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}
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int xen_hvm_init(void)
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{
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return 0;
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}
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