James Hogan 42aa12e74e MIPS: KVM: Move commpage so 0x0 is unmapped ... The comm page which is mapped into the guest kernel address space at 0x0 has the unfortunate side effect of allowing guest kernel NULL pointer dereferences to succeed. The only constraint on this address is that it must be within 32KiB of 0x0, so that single lw/sw instructions (which have 16-bit signed offset fields) can be used to access it, using the zero register as a base. So lets move the comm page as high as possible within that constraint so that 0x0 can be left unmapped, at least for page sizes < 32KiB. Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2016-06-15 23:58:36 +02:00
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asm	MIPS: KVM: Move commpage so 0x0 is unmapped	2016-06-15 23:58:36 +02:00
uapi/asm	MIPS: KVM: Convert emulation to use asm/inst.h	2016-06-15 23:58:17 +02:00