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Currently FreeBSD uses IPI based TLB flushing for remote TLB flushing. Hyper-V allows hypercalls to flush local and remote TLB. The use of Hyper-V hypercalls gives significant performance improvement in TLB operations. This patch set during test has shown near to 40 percent TLB performance improvement. Also this patch adds rep hypercall implementation as well. Reviewed by: whu, kib Tested by: whu Authored-by: Souradeep Chakrabarti <schakrabarti@microsoft.com> Co-Authored-by: Erni Sri Satya Vennela <ernis@microsoft.com> MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D45521
51 lines
1.9 KiB
C
51 lines
1.9 KiB
C
/*-
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* Copyright (c) 2016 Microsoft Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice unmodified, this list of conditions, and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _HYPERV_VAR_H_
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#define _HYPERV_VAR_H_
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extern u_int hyperv_recommends;
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struct hypercall_ctx {
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void *hc_addr;
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vm_paddr_t hc_paddr;
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};
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uint64_t hypercall_post_message(bus_addr_t msg_paddr);
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uint64_t hypercall_signal_event(bus_addr_t monprm_paddr);
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uint64_t hypercall_do_md(uint64_t input, uint64_t in_addr,
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uint64_t out_addr);
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struct hv_vpset;
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struct vmbus_softc;
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uint64_t
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hv_do_rep_hypercall(uint16_t code, uint16_t rep_count, uint16_t varhead_size,
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uint64_t input, uint64_t output);
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int
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hv_cpumask_to_vpset(struct hv_vpset *vpset, const cpuset_t *cpus,
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struct vmbus_softc *sc);
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#endif /* !_HYPERV_VAR_H_ */
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