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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
Kconfig 
# SPDX-License-Identifier: GPL-2.0-only
config NFC_NXP_NCI
	tristate "NXP-NCI NFC driver"
	depends on NFC_NCI
	help
	  Generic core driver for NXP NCI chips such as the NPC100 (PN547),
	  NPC300 (PN548) or PN7150 families.
	  This is a driver based on the NCI NFC kernel layers and
	  will thus not work with NXP libnfc library.

	  To compile this driver as a module, choose m here. The module will
	  be called nxp_nci.
	  Say N if unsure.

config NFC_NXP_NCI_I2C
	tristate "NXP-NCI I2C support"
	depends on NFC_NXP_NCI && I2C
	help
	  This module adds support for an I2C interface to the NXP NCI
	  chips.
	  Select this if your platform is using the I2C bus.

	  To compile this driver as a module, choose m here. The module will
	  be called nxp_nci_i2c.
	  Say N if unsure.
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