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kvm: allow qemu to set EPT identity mapping address

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If we use larger BIOS image than current 256KB, we would need move reserved
TSS and EPT identity mapping pages. Currently TSS support this, but not
EPT.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Sheng Yang 2010-03-23 13:37:12 -03:00 committed by Marcelo Tosatti
parent 7c80eef899
commit 204204308b
1 changed files with 25 additions and 1 deletions
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26
target-i386/kvm.c
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@ -326,6 +326,25 @@ static int kvm_has_msr_star(CPUState *env)
return 0;
}
static int kvm_init_identity_map_page(KVMState *s)
{
#ifdef KVM_CAP_SET_IDENTITY_MAP_ADDR
int ret;
uint64_t addr = 0xfffbc000;
if (!kvm_check_extension(s, KVM_CAP_SET_IDENTITY_MAP_ADDR)) {
return 0;
}
ret = kvm_vm_ioctl(s, KVM_SET_IDENTITY_MAP_ADDR, &addr);
if (ret < 0) {
fprintf(stderr, "kvm_set_identity_map_addr: %s\n", strerror(ret));
return ret;
}
#endif
return 0;
}
int kvm_arch_init(KVMState *s, int smp_cpus)
{
int ret;
@ -353,7 +372,12 @@ int kvm_arch_init(KVMState *s, int smp_cpus)
perror("e820_add_entry() table is full");
exit(1);
}
return kvm_vm_ioctl(s, KVM_SET_TSS_ADDR, 0xfffbd000);
ret = kvm_vm_ioctl(s, KVM_SET_TSS_ADDR, 0xfffbd000);
if (ret < 0) {
return ret;
}
return kvm_init_identity_map_page(s);
}
static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs)