linux-kernel - Re: [PATCH] KVM: selftests: Add missing header file needed by xAPIC IPI tests

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Date:   Wed, 10 Feb 2021 18:13:41 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Andrew Jones <drjones@...hat.com>,
        Jim Mattson <jmattson@...gle.com>,
        Peter Shier <pshier@...gle.com>
Subject: Re: [PATCH] KVM: selftests: Add missing header file needed by xAPIC
 IPI tests

On 10/02/21 02:17, Sean Christopherson wrote:
> From: Peter Shier <pshier@...gle.com>
> 
> Fixes: 678e90a349a4 ("KVM: selftests: Test IPI to halted vCPU in xAPIC while backing page moves")
> Cc: Andrew Jones <drjones@...hat.com>
> Cc: Jim Mattson <jmattson@...gle.com>
> Signed-off-by: Peter Shier <pshier@...gle.com>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
> ---
> 
> Delta patch taken verbatim from Peter's original submission.  Applying the
> original patch directly is mildly annoying due to conflicts with kvm/next
> in other files.
> 
>   tools/testing/selftests/kvm/include/numaif.h | 55 ++++++++++++++++++++
>   1 file changed, 55 insertions(+)
>   create mode 100644 tools/testing/selftests/kvm/include/numaif.h
> 
> diff --git a/tools/testing/selftests/kvm/include/numaif.h b/tools/testing/selftests/kvm/include/numaif.h
> new file mode 100644
> index 000000000000..b020547403fd
> --- /dev/null
> +++ b/tools/testing/selftests/kvm/include/numaif.h
> @@ -0,0 +1,55 @@
> +/* SPDX-License-Identifier: GPL-2.0-only */
> +/*
> + * tools/testing/selftests/kvm/include/numaif.h
> + *
> + * Copyright (C) 2020, Google LLC.
> + *
> + * This work is licensed under the terms of the GNU GPL, version 2.
> + *
> + * Header file that provides access to NUMA API functions not explicitly
> + * exported to user space.
> + */
> +
> +#ifndef SELFTEST_KVM_NUMAIF_H
> +#define SELFTEST_KVM_NUMAIF_H
> +
> +#define __NR_get_mempolicy 239
> +#define __NR_migrate_pages 256
> +
> +/* System calls */
> +long get_mempolicy(int *policy, const unsigned long *nmask,
> +		   unsigned long maxnode, void *addr, int flags)
> +{
> +	return syscall(__NR_get_mempolicy, policy, nmask,
> +		       maxnode, addr, flags);
> +}
> +
> +long migrate_pages(int pid, unsigned long maxnode,
> +		   const unsigned long *frommask,
> +		   const unsigned long *tomask)
> +{
> +	return syscall(__NR_migrate_pages, pid, maxnode, frommask, tomask);
> +}
> +
> +/* Policies */
> +#define MPOL_DEFAULT	 0
> +#define MPOL_PREFERRED	 1
> +#define MPOL_BIND	 2
> +#define MPOL_INTERLEAVE	 3
> +
> +#define MPOL_MAX MPOL_INTERLEAVE
> +
> +/* Flags for get_mem_policy */
> +#define MPOL_F_NODE	    (1<<0)  /* return next il node or node of address */
> +				    /* Warning: MPOL_F_NODE is unsupported and
> +				     * subject to change. Don't use.
> +				     */
> +#define MPOL_F_ADDR	    (1<<1)  /* look up vma using address */
> +#define MPOL_F_MEMS_ALLOWED (1<<2)  /* query nodes allowed in cpuset */
> +
> +/* Flags for mbind */
> +#define MPOL_MF_STRICT	     (1<<0) /* Verify existing pages in the mapping */
> +#define MPOL_MF_MOVE	     (1<<1) /* Move pages owned by this process to conform to mapping */
> +#define MPOL_MF_MOVE_ALL     (1<<2) /* Move every page to conform to mapping */
> +
> +#endif /* SELFTEST_KVM_NUMAIF_H */

My fault. :(  I had the file locally of course, but ended up not being 
committed.

Paolo