selftests: kvm: Fix the segment descriptor layout to match the actual layout
[ Upstream commit df11f7dd58
]
Fix the layout of 'struct desc64' to match the layout described in the
SDM Vol 3, Chapter 3 "Protected-Mode Memory Management", section 3.4.5
"Segment Descriptors", Figure 3-8 "Segment Descriptor". The test added
later in this series relies on this and crashes if this layout is not
correct.
Signed-off-by: Aaron Lewis <aaronlewis@google.com>
Reviewed-by: Alexander Graf <graf@amazon.com>
Message-Id: <20201012194716.3950330-2-aaronlewis@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
parent
8ebc41496f
commit
58ced37417
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@ -57,7 +57,7 @@ enum x86_register {
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struct desc64 {
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uint16_t limit0;
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uint16_t base0;
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unsigned base1:8, s:1, type:4, dpl:2, p:1;
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unsigned base1:8, type:4, s:1, dpl:2, p:1;
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unsigned limit1:4, avl:1, l:1, db:1, g:1, base2:8;
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uint32_t base3;
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uint32_t zero1;
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@ -446,11 +446,12 @@ static void kvm_seg_fill_gdt_64bit(struct kvm_vm *vm, struct kvm_segment *segp)
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desc->limit0 = segp->limit & 0xFFFF;
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desc->base0 = segp->base & 0xFFFF;
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desc->base1 = segp->base >> 16;
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desc->s = segp->s;
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desc->type = segp->type;
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desc->s = segp->s;
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desc->dpl = segp->dpl;
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desc->p = segp->present;
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desc->limit1 = segp->limit >> 16;
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desc->avl = segp->avl;
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desc->l = segp->l;
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desc->db = segp->db;
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desc->g = segp->g;
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