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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
fdp.h 
/* SPDX-License-Identifier: GPL-2.0-or-later */
/* -------------------------------------------------------------------------
 * Copyright (C) 2014-2016, Intel Corporation
 *
 * -------------------------------------------------------------------------
 */

#ifndef __LOCAL_FDP_H_
#define __LOCAL_FDP_H_

#include <net/nfc/nci_core.h>
#include <linux/gpio/consumer.h>

struct fdp_i2c_phy {
	struct i2c_client *i2c_dev;
	struct gpio_desc *power_gpio;
	struct nci_dev *ndev;

	/* < 0 if i2c error occurred */
	int hard_fault;
	uint16_t next_read_size;
};

int fdp_nci_probe(struct fdp_i2c_phy *phy, struct nfc_phy_ops *phy_ops,
		  struct nci_dev **ndev, int tx_headroom, int tx_tailroom,
		  u8 clock_type, u32 clock_freq, u8 *fw_vsc_cfg);
void fdp_nci_remove(struct nci_dev *ndev);
int fdp_nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);

#endif /* __LOCAL_FDP_H_ */
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