forked from Minki/linux
5a4fe7c41b
As pointed out with the simplification of the VFIO_IOMMU_NOTIFY_DMA_UNMAP notifier [1], the length parameter was never used to check against the pinned pages. Let's correct that, and see if a page is within the affected range instead of simply the first page of the range. [1] https://lore.kernel.org/kvm/20220720170457.39cda0d0.alex.williamson@redhat.com/ Signed-off-by: Eric Farman <farman@linux.ibm.com> Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/20220728204914.2420989-2-farman@linux.ibm.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* channel program interfaces
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*
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* Copyright IBM Corp. 2017
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*
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* Author(s): Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
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* Xiao Feng Ren <renxiaof@linux.vnet.ibm.com>
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*/
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#ifndef _VFIO_CCW_CP_H_
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#define _VFIO_CCW_CP_H_
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#include <asm/cio.h>
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#include <asm/scsw.h>
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#include "orb.h"
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#include "vfio_ccw_trace.h"
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/*
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* Max length for ccw chain.
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* XXX: Limit to 256, need to check more?
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*/
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#define CCWCHAIN_LEN_MAX 256
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/**
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* struct channel_program - manage information for channel program
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* @ccwchain_list: list head of ccwchains
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* @orb: orb for the currently processed ssch request
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* @mdev: the mediated device to perform page pinning/unpinning
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* @initialized: whether this instance is actually initialized
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*
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* @ccwchain_list is the head of a ccwchain list, that contents the
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* translated result of the guest channel program that pointed out by
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* the iova parameter when calling cp_init.
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*/
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struct channel_program {
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struct list_head ccwchain_list;
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union orb orb;
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bool initialized;
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struct ccw1 *guest_cp;
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};
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int cp_init(struct channel_program *cp, union orb *orb);
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void cp_free(struct channel_program *cp);
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int cp_prefetch(struct channel_program *cp);
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union orb *cp_get_orb(struct channel_program *cp, u32 intparm, u8 lpm);
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void cp_update_scsw(struct channel_program *cp, union scsw *scsw);
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bool cp_iova_pinned(struct channel_program *cp, u64 iova, u64 length);
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#endif
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