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kvm: reimplement kvm__setup_sregs

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It's better to get sregs which was initialized by kernel and change what
we need precisely. Actually vmx_vcpu_reset does the cpu initialization
before us.

This solves the problem of failing to run on x86-32 host kernel.

Signed-off-by: Asias He <asias.hejun@gmail.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
This commit is contained in:
Asias He
2015-06-01 16:39:39 +01:00
committed by Will Deacon
parent 9687927d68
commit 0ed849e624
1 changed files with 4 additions and 73 deletions
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kvm.c
+4 -73
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@@ -491,80 +491,11 @@ static void kvm__setup_regs(struct kvm *self)
static void kvm__setup_sregs(struct kvm *self)
{
self->sregs = (struct kvm_sregs) {
.cr0 = 0x60000010ULL,
.cs = (struct kvm_segment) {
.selector = self->boot_selector,
.base = selector_to_base(self->boot_selector),
.limit = 0xffffU,
.type = 0x0bU,
.present = 1,
.dpl = 0x03,
.s = 1,
},
.ss = (struct kvm_segment) {
.selector = self->boot_selector,
.base = selector_to_base(self->boot_selector),
.limit = 0xffffU,
.type = 0x03U,
.present = 1,
.dpl = 0x03,
.s = 1,
},
.ds = (struct kvm_segment) {
.selector = self->boot_selector,
.base = selector_to_base(self->boot_selector),
.limit = 0xffffU,
.type = 0x03U,
.present = 1,
.dpl = 0x03,
.s = 1,
},
.es = (struct kvm_segment) {
.selector = self->boot_selector,
.base = selector_to_base(self->boot_selector),
.limit = 0xffffU,
.type = 0x03U,
.present = 1,
.dpl = 0x03,
.s = 1,
},
.fs = (struct kvm_segment) {
.selector = self->boot_selector,
.base = selector_to_base(self->boot_selector),
.limit = 0xffffU,
.type = 0x03U,
.present = 1,
.dpl = 0x03,
.s = 1,
},
.gs = (struct kvm_segment) {
.selector = self->boot_selector,
.base = selector_to_base(self->boot_selector),
.limit = 0xffffU,
.type = 0x03U,
.present = 1,
.dpl = 0x03,
.s = 1,
},
.tr = (struct kvm_segment) {
.limit = 0xffffU,
.present = 1,
.type = 0x03U,
},
.ldt = (struct kvm_segment) {
.limit = 0xffffU,
.present = 1,
.type = 0x02U,
},
.gdt = (struct kvm_dtable) {
.limit = 0xffffU,
},
.idt = (struct kvm_dtable) {
.limit = 0xffffU,
},
};
if (ioctl(self->vcpu_fd, KVM_GET_SREGS, &self->sregs) < 0)
die_perror("KVM_GET_SREGS failed");
self->sregs.cs.selector = self->boot_selector;
self->sregs.cs.base = selector_to_base(self->boot_selector);
if (ioctl(self->vcpu_fd, KVM_SET_SREGS, &self->sregs) < 0)
die_perror("KVM_SET_SREGS failed");
}