Re: [Qemu-devel] [PATCH 2/2] ept_emulation_fault() need NetApp BSD attribution:

[Paolo Bonzini <pbonzini@redhat.com>]

On 23/01/2018 13:36, Izik Eidus wrote:
> Moving it to a new file and add the BSD license there.
> 
> Signed-off-by: Izik Eidus <izik@veertu.com>

Since it's compatible, I'm just adding the NetApp BSD license to the file.

What is the original source?  xhyve or something like that?

Paolo

> ---
>  target/i386/hvf/ept_fault.h | 70 +++++++++++++++++++++++++++++++++++++++++++++
>  target/i386/hvf/hvf.c       | 38 +-----------------------
>  2 files changed, 71 insertions(+), 37 deletions(-)
>  create mode 100644 target/i386/hvf/ept_fault.h
> 
> diff --git a/target/i386/hvf/ept_fault.h b/target/i386/hvf/ept_fault.h
> new file mode 100644
> index 0000000000..c2938d2bd4
> --- /dev/null
> +++ b/target/i386/hvf/ept_fault.h
> @@ -0,0 +1,70 @@
> +/*-
> + * Copyright (c) 2011 NetApp, Inc.
> + * All rights reserved.
> + *
> + * Redistribution and use in source and binary forms, with or without
> + * modification, are permitted provided that the following conditions
> + * are met:
> + * 1. Redistributions of source code must retain the above copyright
> + *    notice, this list of conditions and the following disclaimer.
> + * 2. Redistributions in binary form must reproduce the above copyright
> + *    notice, this list of conditions and the following disclaimer in the
> + *    documentation and/or other materials provided with the distribution.
> + *
> + * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
> + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
> + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
> + * ARE DISCLAIMED.  IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
> + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
> + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
> + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
> + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
> + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
> + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
> + * SUCH DAMAGE.
> + */
> +
> +#ifndef EPT_FAULT_H
> +#define EPT_FAULT_H
> +
> +#include "hvf-i386.h"
> +
> +static inline bool ept_emulation_fault(hvf_slot *slot, uint64_t gpa, uint64_t ept_qual)
> +{
> +    int read, write;
> +
> +    /* EPT fault on an instruction fetch doesn't make sense here */
> +    if (ept_qual & EPT_VIOLATION_INST_FETCH) {
> +        return false;
> +    }
> +
> +    /* EPT fault must be a read fault or a write fault */
> +    read = ept_qual & EPT_VIOLATION_DATA_READ ? 1 : 0;
> +    write = ept_qual & EPT_VIOLATION_DATA_WRITE ? 1 : 0;
> +    if ((read | write) == 0) {
> +        return false;
> +    }
> +
> +    if (write && slot) {
> +        if (slot->flags & HVF_SLOT_LOG) {
> +            memory_region_set_dirty(slot->region, gpa - slot->start, 1);
> +            hv_vm_protect((hv_gpaddr_t)slot->start, (size_t)slot->size,
> +                          HV_MEMORY_READ | HV_MEMORY_WRITE);
> +        }
> +    }
> +
> +    /*
> +     * The EPT violation must have been caused by accessing a
> +     * guest-physical address that is a translation of a guest-linear
> +     * address.
> +     */
> +    if ((ept_qual & EPT_VIOLATION_GLA_VALID) == 0 ||
> +        (ept_qual & EPT_VIOLATION_XLAT_VALID) == 0) {
> +        return false;
> +    }
> +
> +    return !slot;
> +}
> +
> +
> +#endif
> diff --git a/target/i386/hvf/hvf.c b/target/i386/hvf/hvf.c
> index ab4820c3f5..94d8d119d5 100644
> --- a/target/i386/hvf/hvf.c
> +++ b/target/i386/hvf/hvf.c
> @@ -36,6 +36,7 @@
>  #include "x86_emu.h"
>  #include "x86_task.h"
>  #include "x86hvf.h"
> +#include "ept_fault.h"
>  
>  #include <Hypervisor/hv.h>
>  #include <Hypervisor/hv_vmx.h>
> @@ -292,43 +293,6 @@ void hvf_cpu_synchronize_post_init(CPUState *cpu_state)
>      run_on_cpu(cpu_state, _hvf_cpu_synchronize_post_init, RUN_ON_CPU_NULL);
>  }
>  
> -static bool ept_emulation_fault(hvf_slot *slot, uint64_t gpa, uint64_t ept_qual)
> -{
> -    int read, write;
> -
> -    /* EPT fault on an instruction fetch doesn't make sense here */
> -    if (ept_qual & EPT_VIOLATION_INST_FETCH) {
> -        return false;
> -    }
> -
> -    /* EPT fault must be a read fault or a write fault */
> -    read = ept_qual & EPT_VIOLATION_DATA_READ ? 1 : 0;
> -    write = ept_qual & EPT_VIOLATION_DATA_WRITE ? 1 : 0;
> -    if ((read | write) == 0) {
> -        return false;
> -    }
> -
> -    if (write && slot) {
> -        if (slot->flags & HVF_SLOT_LOG) {
> -            memory_region_set_dirty(slot->region, gpa - slot->start, 1);
> -            hv_vm_protect((hv_gpaddr_t)slot->start, (size_t)slot->size,
> -                          HV_MEMORY_READ | HV_MEMORY_WRITE);
> -        }
> -    }
> -
> -    /*
> -     * The EPT violation must have been caused by accessing a
> -     * guest-physical address that is a translation of a guest-linear
> -     * address.
> -     */
> -    if ((ept_qual & EPT_VIOLATION_GLA_VALID) == 0 ||
> -        (ept_qual & EPT_VIOLATION_XLAT_VALID) == 0) {
> -        return false;
> -    }
> -
> -    return !slot;
> -}
> -
>  static void hvf_set_dirty_tracking(MemoryRegionSection *section, bool on)
>  {
>      hvf_slot *slot;
>