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
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>
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ipoctal.h
/* SPDX-License-Identifier: GPL-2.0-only */
/**
* ipoctal.h
*
* driver for the IPOCTAL boards
* Copyright (C) 2009-2012 CERN (www.cern.ch)
* Author: Nicolas Serafini, EIC2 SA
* Author: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
*/
#ifndef _IPOCTAL_H_
#define _IPOCTAL_H_
#define NR_CHANNELS 8
#define IPOCTAL_MAX_BOARDS 16
#define MAX_DEVICES (NR_CHANNELS * IPOCTAL_MAX_BOARDS)
/**
* struct ipoctal_stats -- Stats since last reset
*
* @tx: Number of transmitted bytes
* @rx: Number of received bytes
* @overrun: Number of overrun errors
* @parity_err: Number of parity errors
* @framing_err: Number of framing errors
* @rcv_break: Number of break received
*/
struct ipoctal_stats {
unsigned long tx;
unsigned long rx;
unsigned long overrun_err;
unsigned long parity_err;
unsigned long framing_err;
unsigned long rcv_break;
};
#endif /* _IPOCTAL_H_ */
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