mirror of
https://github.com/clearlinux/kvmtool.git
synced 2026-06-16 02:15:47 +00:00
Andre Przywara
43d2781c27
Currently we unconditionally create a virtual GICv2 in the guest. Add a --irqchip= parameter to let the user specify a different GIC type for the guest, when omitting this parameter it still defaults to --irqchip=gicv2. For now the only other supported type is --irqchip=gicv3 Signed-off-by: Andre Przywara <andre.przywara@arm.com> [will: use pr_err instead of fprintf] Signed-off-by: Will Deacon <will.deacon@arm.com>
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
#include "kvm/kvm.h"
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#include "kvm/term.h"
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#include "kvm/util.h"
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#include "kvm/8250-serial.h"
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#include "kvm/virtio-console.h"
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#include "arm-common/gic.h"
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#include <linux/kernel.h>
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#include <linux/kvm.h>
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#include <linux/sizes.h>
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struct kvm_ext kvm_req_ext[] = {
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{ DEFINE_KVM_EXT(KVM_CAP_IRQCHIP) },
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{ DEFINE_KVM_EXT(KVM_CAP_ONE_REG) },
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{ DEFINE_KVM_EXT(KVM_CAP_ARM_PSCI) },
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{ 0, 0 },
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};
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bool kvm__arch_cpu_supports_vm(void)
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{
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/* The KVM capability check is enough. */
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return true;
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}
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void kvm__init_ram(struct kvm *kvm)
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{
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int err;
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u64 phys_start, phys_size;
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void *host_mem;
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phys_start = ARM_MEMORY_AREA;
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phys_size = kvm->ram_size;
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host_mem = kvm->ram_start;
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err = kvm__register_mem(kvm, phys_start, phys_size, host_mem);
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if (err)
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die("Failed to register %lld bytes of memory at physical "
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"address 0x%llx [err %d]", phys_size, phys_start, err);
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kvm->arch.memory_guest_start = phys_start;
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}
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void kvm__arch_delete_ram(struct kvm *kvm)
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{
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munmap(kvm->arch.ram_alloc_start, kvm->arch.ram_alloc_size);
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}
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void kvm__arch_read_term(struct kvm *kvm)
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{
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if (term_readable(0)) {
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serial8250__update_consoles(kvm);
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virtio_console__inject_interrupt(kvm);
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}
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}
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void kvm__arch_set_cmdline(char *cmdline, bool video)
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{
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}
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void kvm__arch_init(struct kvm *kvm, const char *hugetlbfs_path, u64 ram_size)
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{
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/*
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* Allocate guest memory. We must align our buffer to 64K to
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* correlate with the maximum guest page size for virtio-mmio.
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* If using THP, then our minimal alignment becomes 2M.
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* 2M trumps 64K, so let's go with that.
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*/
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kvm->ram_size = min(ram_size, (u64)ARM_MAX_MEMORY(kvm));
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kvm->arch.ram_alloc_size = kvm->ram_size + SZ_2M;
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kvm->arch.ram_alloc_start = mmap_anon_or_hugetlbfs(kvm, hugetlbfs_path,
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kvm->arch.ram_alloc_size);
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if (kvm->arch.ram_alloc_start == MAP_FAILED)
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die("Failed to map %lld bytes for guest memory (%d)",
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kvm->arch.ram_alloc_size, errno);
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kvm->ram_start = (void *)ALIGN((unsigned long)kvm->arch.ram_alloc_start,
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SZ_2M);
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madvise(kvm->arch.ram_alloc_start, kvm->arch.ram_alloc_size,
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MADV_MERGEABLE | MADV_HUGEPAGE);
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/* Create the virtual GIC. */
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if (gic__create(kvm, kvm->cfg.arch.irqchip))
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die("Failed to create virtual GIC");
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}
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