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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Kconfig
# SPDX-License-Identifier: GPL-2.0-only
config NFC_FDP
tristate "Intel FDP NFC driver"
depends on NFC_NCI
select CRC_CCITT
default n
help
Intel Fields Peak NFC controller core driver.
This is a driver based on the NCI NFC kernel layers.
To compile this driver as a module, choose m here. The module will
be called fdp.
Say N if unsure.
config NFC_FDP_I2C
tristate "NFC FDP i2c support"
depends on NFC_FDP && I2C
help
This module adds support for the Intel Fields Peak NFC controller
i2c interface.
Select this if your platform is using the i2c bus.
If you choose to build a module, it'll be called fdp_i2c.
Say N if unsure.
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