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Revision 32ffa4f71e10009498ae6b54da65ab316db967bd authored by Axel Rasmussen on 19 May 2021, 20:03:33 UTC, committed by Paolo Bonzini on 27 May 2021, 11:45:55 UTC 
KVM: selftests: compute correct demand paging size
 
This is a preparatory commit needed before we can use different kinds of
backing pages for guest memory.

Previously, we used perf_test_args.host_page_size, which is the host's
native page size (commonly 4K). For VM_MEM_SRC_ANONYMOUS this turns out
to be okay, but in a follow-up commit we want to allow using different
kinds of backing memory.

Take VM_MEM_SRC_ANONYMOUS_HUGETLB for example. Without this change, if
we used that backing page type, when we issued a UFFDIO_COPY ioctl we'd
only do so with 4K, rather than the full 2M of a backing hugepage. In
this case, UFFDIO_COPY returns -EINVAL (__mcopy_atomic_hugetlb checks
the size).

Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
Message-Id: <20210519200339.829146-5-axelrasmussen@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
1 parent 25408e5
Raw File
gadget-export.h 
/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Cadence USBSS and USBSSP DRD Driver - Gadget Export APIs.
 *
 * Copyright (C) 2017 NXP
 * Copyright (C) 2017-2018 NXP
 *
 * Authors: Peter Chen <peter.chen@nxp.com>
 */
#ifndef __LINUX_CDNS3_GADGET_EXPORT
#define __LINUX_CDNS3_GADGET_EXPORT

#if IS_ENABLED(CONFIG_USB_CDNSP_GADGET)

int cdnsp_gadget_init(struct cdns *cdns);
#else

static inline int cdnsp_gadget_init(struct cdns *cdns)
{
	return -ENXIO;
}

#endif /* CONFIG_USB_CDNSP_GADGET */

#if IS_ENABLED(CONFIG_USB_CDNS3_GADGET)

int cdns3_gadget_init(struct cdns *cdns);
#else

static inline int cdns3_gadget_init(struct cdns *cdns)
{
	return -ENXIO;
}

#endif /* CONFIG_USB_CDNS3_GADGET */

#endif /* __LINUX_CDNS3_GADGET_EXPORT */
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