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Subject[PATCH v2 00/12] KVM/X86: Introduce a new guest mapping interface
Guest memory can either be directly managed by the kernel (i.e. have a "struct
page") or they can simply live outside kernel control (i.e. do not have a
"struct page"). KVM mostly support these two modes, except in a few places
where the code seems to assume that guest memory must have a "struct page".

This patchset introduces a new mapping interface to map guest memory into host
kernel memory which also supports PFN-based memory (i.e. memory without 'struct
page'). It also converts all offending code to this interface or simply
read/write directly from guest memory.

As far as I can see all offending code is now fixed except the APIC-access page
which I will handle in a seperate patch.

Filippo Sironi (1):
X86/KVM: Handle PFNs outside of kernel reach when touching GPTEs

KarimAllah Ahmed (11):
X86/nVMX: handle_vmon: Read 4 bytes from guest memory
X86/nVMX: handle_vmptrld: Copy the VMCS12 directly from guest memory
X86/nVMX: Update the PML table without mapping and unmapping the page
KVM: Introduce a new guest mapping API
KVM/nVMX: Use kvm_vcpu_map when mapping the L1 MSR bitmap
KVM/nVMX: Use kvm_vcpu_map when mapping the virtual APIC page
KVM/nVMX: Use kvm_vcpu_map when mapping the posted interrupt
descriptor table
KVM/X86: Use kvm_vcpu_map in emulator_cmpxchg_emulated
KVM/X86: hyperv: Use kvm_vcpu_map in synic_clear_sint_msg_pending
KVM/X86: hyperv: Use kvm_vcpu_map in synic_deliver_msg
KVM/nSVM: Use the new mapping API for mapping guest memory

arch/x86/kvm/hyperv.c | 28 ++++-----
arch/x86/kvm/paging_tmpl.h | 38 +++++++++---
arch/x86/kvm/svm.c | 97 +++++++++++++++---------------
arch/x86/kvm/vmx.c | 145 +++++++++++++++------------------------------
arch/x86/kvm/x86.c | 13 ++--
include/linux/kvm_host.h | 9 +++
virt/kvm/kvm_main.c | 50 ++++++++++++++++
7 files changed, 203 insertions(+), 177 deletions(-)

Cc: Paolo Bonzini <>
Cc: Radim Krčmář <>


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