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ccfc73e56d
commit 917248144db5d7320655dbb41d3af0b8a0f3d589 upstream. __kvm_map_gfn()'s call to gfn_to_pfn_memslot() is * relatively expensive * in certain cases (such as when done from atomic context) cannot be called Stashing gfn-to-pfn mapping should help with both cases. This is part of CVE-2019-3016. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Joao Martins <joao.m.martins@oracle.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk> Signed-off-by: Sasha Levin <sashal@kernel.org>
74 lines
1.7 KiB
C
74 lines
1.7 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef __KVM_TYPES_H__
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#define __KVM_TYPES_H__
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struct kvm;
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struct kvm_async_pf;
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struct kvm_device_ops;
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struct kvm_interrupt;
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struct kvm_irq_routing_table;
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struct kvm_memory_slot;
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struct kvm_one_reg;
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struct kvm_run;
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struct kvm_userspace_memory_region;
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struct kvm_vcpu;
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struct kvm_vcpu_init;
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struct kvm_memslots;
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enum kvm_mr_change;
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#include <linux/types.h>
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/*
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* Address types:
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*
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* gva - guest virtual address
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* gpa - guest physical address
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* gfn - guest frame number
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* hva - host virtual address
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* hpa - host physical address
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* hfn - host frame number
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*/
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typedef unsigned long gva_t;
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typedef u64 gpa_t;
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typedef u64 gfn_t;
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typedef unsigned long hva_t;
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typedef u64 hpa_t;
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typedef u64 hfn_t;
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typedef hfn_t kvm_pfn_t;
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struct gfn_to_hva_cache {
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u64 generation;
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gpa_t gpa;
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unsigned long hva;
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unsigned long len;
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struct kvm_memory_slot *memslot;
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};
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struct gfn_to_pfn_cache {
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u64 generation;
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gfn_t gfn;
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kvm_pfn_t pfn;
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bool dirty;
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};
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#endif /* __KVM_TYPES_H__ */
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