3e1f2ae835
Add virtualized XSAVE support to bhyve which permits guests to use XSAVE and XSAVE-enabled features like AVX. - Store a per-cpu guest xcr0 register and handle xsetbv VM exits by emulating the instruction. - Only expose XSAVE to guests if XSAVE is enabled in the host. Only expose a subset of XSAVE features currently supported by the guest and for which the proper emulation of xsetbv is known. Currently this includes X87, SSE, AVX, AVX-512, and Intel MPX. - Add support for injecting hardware exceptions into the guest and use this to trigger exceptions in the guest for invalid xsetbv operations instead of potentially faulting in the host. - Queue pending exceptions in the 'struct vcpu' instead of directly updating the processor-specific VMCS or VMCB. The pending exception will be delivered right before entering the guest. - Rename the unused ioctl VM_INJECT_EVENT to VM_INJECT_EXCEPTION and restrict it to only deliver x86 hardware exceptions. This new ioctl is now used to inject a protection fault when the guest accesses an unimplemented MSR. - Expose a subset of known-safe features from leaf 0 of the structured extended features to guests if they are supported on the host including RDFSBASE/RDGSBASE, BMI1/2, AVX2, AVX-512, HLE, ERMS, and RTM. Aside from AVX-512, these features are all new instructions available for use in ring 3 with no additional hypervisor changes needed.
84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/*-
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* Copyright (c) 2012 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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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``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 NETAPP, INC 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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* $FreeBSD$
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*/
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#ifndef _VMM_HOST_H_
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#define _VMM_HOST_H_
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#ifndef _KERNEL
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#error "no user-servicable parts inside"
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#endif
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struct xsave_limits {
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int xsave_enabled;
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uint64_t xcr0_allowed;
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uint32_t xsave_max_size;
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};
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void vmm_host_state_init(void);
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uint64_t vmm_get_host_pat(void);
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uint64_t vmm_get_host_efer(void);
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uint64_t vmm_get_host_cr0(void);
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uint64_t vmm_get_host_cr4(void);
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uint64_t vmm_get_host_xcr0(void);
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uint64_t vmm_get_host_datasel(void);
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uint64_t vmm_get_host_codesel(void);
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uint64_t vmm_get_host_tsssel(void);
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uint64_t vmm_get_host_fsbase(void);
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uint64_t vmm_get_host_idtrbase(void);
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const struct xsave_limits *vmm_get_xsave_limits(void);
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/*
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* Inline access to host state that is used on every VM entry
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*/
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static __inline uint64_t
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vmm_get_host_trbase(void)
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{
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return ((uint64_t)PCPU_GET(tssp));
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}
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static __inline uint64_t
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vmm_get_host_gdtrbase(void)
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{
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return ((uint64_t)&gdt[NGDT * curcpu]);
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}
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struct pcpu;
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extern struct pcpu __pcpu[];
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static __inline uint64_t
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vmm_get_host_gsbase(void)
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{
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return ((uint64_t)&__pcpu[curcpu]);
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}
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#endif
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