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https://github.com/freebsd/freebsd-src
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75cb949228
This will be used to implement parts of bhyve's gdb stub. Three VM capabilities are added, similar to amd64 without monitor mode. Two cause breakpoint and single-step exceptions to be raised to EL2 and then down to bhyve. One lets the gdb stub mask hardware interrupts while single-stepping, since otherwise the guest will handle a timer interrupt before executing the target instruction and thus fail to make progress. Reviewed by: bnovkov, andrew Sponsored by: Innovate UK Differential Revision: https://reviews.freebsd.org/D44739
148 lines
4.4 KiB
C
148 lines
4.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2011 NetApp, Inc.
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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, this list of conditions and the following 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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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _VMM_STAT_H_
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#define _VMM_STAT_H_
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struct vm;
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#define MAX_VMM_STAT_ELEMS 64 /* arbitrary */
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enum vmm_stat_scope {
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VMM_STAT_SCOPE_ANY,
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};
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struct vmm_stat_type;
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typedef void (*vmm_stat_func_t)(struct vcpu *vcpu,
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struct vmm_stat_type *stat);
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struct vmm_stat_type {
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int index; /* position in the stats buffer */
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int nelems; /* standalone or array */
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const char *desc; /* description of statistic */
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vmm_stat_func_t func;
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enum vmm_stat_scope scope;
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};
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void vmm_stat_register(void *arg);
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#define VMM_STAT_FDEFINE(type, nelems, desc, func, scope) \
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struct vmm_stat_type type[1] = { \
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{ -1, nelems, desc, func, scope } \
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}; \
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SYSINIT(type##_stat, SI_SUB_KLD, SI_ORDER_ANY, vmm_stat_register, type)
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#define VMM_STAT_DEFINE(type, nelems, desc, scope) \
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VMM_STAT_FDEFINE(type, nelems, desc, NULL, scope)
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#define VMM_STAT_DECLARE(type) \
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extern struct vmm_stat_type type[1]
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#define VMM_STAT(type, desc) \
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VMM_STAT_DEFINE(type, 1, desc, VMM_STAT_SCOPE_ANY)
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#define VMM_STAT_FUNC(type, desc, func) \
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VMM_STAT_FDEFINE(type, 1, desc, func, VMM_STAT_SCOPE_ANY)
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#define VMM_STAT_ARRAY(type, nelems, desc) \
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VMM_STAT_DEFINE(type, nelems, desc, VMM_STAT_SCOPE_ANY)
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void *vmm_stat_alloc(void);
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void vmm_stat_init(void *vp);
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void vmm_stat_free(void *vp);
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int vmm_stat_copy(struct vcpu *vcpu, int index, int count,
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int *num_stats, uint64_t *buf);
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int vmm_stat_desc_copy(int index, char *buf, int buflen);
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static void __inline
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vmm_stat_array_incr(struct vcpu *vcpu, struct vmm_stat_type *vst, int statidx,
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uint64_t x)
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{
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#ifdef VMM_KEEP_STATS
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uint64_t *stats;
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stats = vcpu_stats(vcpu);
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if (vst->index >= 0 && statidx < vst->nelems)
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stats[vst->index + statidx] += x;
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#endif
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}
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static void __inline
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vmm_stat_array_set(struct vcpu *vcpu, struct vmm_stat_type *vst, int statidx,
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uint64_t val)
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{
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#ifdef VMM_KEEP_STATS
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uint64_t *stats;
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stats = vcpu_stats(vcpu);
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if (vst->index >= 0 && statidx < vst->nelems)
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stats[vst->index + statidx] = val;
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#endif
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}
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static void __inline
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vmm_stat_incr(struct vcpu *vcpu, struct vmm_stat_type *vst, uint64_t x)
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{
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#ifdef VMM_KEEP_STATS
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vmm_stat_array_incr(vcpu, vst, 0, x);
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#endif
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}
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static void __inline
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vmm_stat_set(struct vcpu *vcpu, struct vmm_stat_type *vst, uint64_t val)
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{
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#ifdef VMM_KEEP_STATS
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vmm_stat_array_set(vcpu, vst, 0, val);
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#endif
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}
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VMM_STAT_DECLARE(VMEXIT_COUNT);
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VMM_STAT_DECLARE(VMEXIT_UNKNOWN);
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VMM_STAT_DECLARE(VMEXIT_WFI);
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VMM_STAT_DECLARE(VMEXIT_WFE);
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VMM_STAT_DECLARE(VMEXIT_HVC);
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VMM_STAT_DECLARE(VMEXIT_MSR);
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VMM_STAT_DECLARE(VMEXIT_DATA_ABORT);
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VMM_STAT_DECLARE(VMEXIT_INSN_ABORT);
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VMM_STAT_DECLARE(VMEXIT_UNHANDLED_SYNC);
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VMM_STAT_DECLARE(VMEXIT_IRQ);
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VMM_STAT_DECLARE(VMEXIT_FIQ);
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VMM_STAT_DECLARE(VMEXIT_BRK);
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VMM_STAT_DECLARE(VMEXIT_SS);
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VMM_STAT_DECLARE(VMEXIT_UNHANDLED_EL2);
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VMM_STAT_DECLARE(VMEXIT_UNHANDLED);
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#endif
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