d3c5649103
Instead of invalidating the tlb of the guest every page it relinquishes, invalidate once before the host is informed about the free pages. Bug: 315173520 Change-Id: I8450fd552a27dfc791efa15e884982aeedaa3234 Signed-off-by: Prakruthi Deepak Heragu <quic_pheragu@quicinc.com> Signed-off-by: Elliot Berman <elliot.berman@oss.qualcomm.com>
54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2022 Google LLC
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* Author: Keir Fraser <keirf@google.com>
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*/
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#ifndef _LINUX_VIRTIO_BALLOON_H
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#define _LINUX_VIRTIO_BALLOON_H
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#include <uapi/linux/virtio_balloon.h>
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struct page;
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#ifdef CONFIG_VIRTIO_BALLOON_HYP_OPS
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struct virtio_balloon_hyp_ops {
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bool (*page_relinquish_disallowed)(void);
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void (*page_relinquish)(struct page *page, unsigned int nr);
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void (*post_page_relinquish_tlb_inv)(void);
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};
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extern struct virtio_balloon_hyp_ops *virtio_balloon_hyp_ops;
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static inline bool page_relinquish_disallowed(void)
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{
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if (virtio_balloon_hyp_ops &&
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virtio_balloon_hyp_ops->page_relinquish_disallowed)
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return virtio_balloon_hyp_ops->page_relinquish_disallowed();
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return false;
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}
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static inline void page_relinquish(struct page *page, unsigned int nr)
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{
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if (virtio_balloon_hyp_ops &&
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virtio_balloon_hyp_ops->page_relinquish_disallowed)
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return virtio_balloon_hyp_ops->page_relinquish(page, nr);
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}
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static inline void post_page_relinquish_tlb_inv(void)
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{
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if (virtio_balloon_hyp_ops &&
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virtio_balloon_hyp_ops->post_page_relinquish_tlb_inv)
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return virtio_balloon_hyp_ops->post_page_relinquish_tlb_inv();
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}
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#else /* !CONFIG_VIRTIO_BALLOON_HYP_OPS */
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static inline bool page_relinquish_disallowed(void) { return false; }
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static inline void page_relinquish(struct page *page, unsigned int nr) { }
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static inline void post_page_relinquish_tlb_inv(void) { }
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#endif /* CONFIG_VIRTIO_BALLOON_HYP_OPS */
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#endif /* _LINUX_VIRTIO_BALLOON_H */
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