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freebsd-dev/usr.sbin/bhyve/mem.h

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Rework how guest MMIO regions are dealt with. - New memory region interface. An RB tree holds the regions, with a last-found per-vCPU cache to deal with the common case of repeated guest accesses to MMIO registers in the same page. - Support memory-mapped BARs in PCI emulation. mem.c/h - memory region interface instruction_emul.c/h - remove old region interface. Use gpa from EPT exit to avoid a tablewalk to determine operand address. Determine operand size and use when calling through to region handler. fbsdrun.c - call into region interface on paging exit. Distinguish between instruction emul error and region not found pci_emul.c/h - implement new BAR callback api. Split BAR alloc routine into routines that require/don't require the BAR phys address. ioapic.c pci_passthru.c pci_virtio_block.c pci_virtio_net.c pci_uart.c - update to new BAR callback i/f Reviewed by: neel Obtained from: NetApp
2012-10-19 18:11:17 +00:00
/*-
* Copyright (c) 2012 NetApp, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _MEM_H_
#define _MEM_H_
#include <sys/linker_set.h>
struct vmctx;
typedef int (*mem_func_t)(struct vmctx *ctx, int vcpu, int dir, uint64_t addr,
int size, uint64_t *val, void *arg1, long arg2);
struct mem_range {
const char *name;
int flags;
mem_func_t handler;
void *arg1;
long arg2;
uint64_t base;
uint64_t size;
};
#define MEM_F_READ 0x1
#define MEM_F_WRITE 0x2
#define MEM_F_RW 0x3
Support PCI extended config space in bhyve. Add the ACPI MCFG table to advertise the extended config memory window. Introduce a new flag MEM_F_IMMUTABLE for memory ranges that cannot be deleted or moved in the guest's address space. The PCI extended config space is an example of an immutable memory range. Add emulation for the "movzw" instruction. This instruction is used by FreeBSD to read a 16-bit extended config space register. CR: https://phabric.freebsd.org/D505 Reviewed by: jhb, grehan Requested by: tychon
2014-08-08 03:49:01 +00:00
#define MEM_F_IMMUTABLE 0x4 /* mem_range cannot be unregistered */
Rework how guest MMIO regions are dealt with. - New memory region interface. An RB tree holds the regions, with a last-found per-vCPU cache to deal with the common case of repeated guest accesses to MMIO registers in the same page. - Support memory-mapped BARs in PCI emulation. mem.c/h - memory region interface instruction_emul.c/h - remove old region interface. Use gpa from EPT exit to avoid a tablewalk to determine operand address. Determine operand size and use when calling through to region handler. fbsdrun.c - call into region interface on paging exit. Distinguish between instruction emul error and region not found pci_emul.c/h - implement new BAR callback api. Split BAR alloc routine into routines that require/don't require the BAR phys address. ioapic.c pci_passthru.c pci_virtio_block.c pci_virtio_net.c pci_uart.c - update to new BAR callback i/f Reviewed by: neel Obtained from: NetApp
2012-10-19 18:11:17 +00:00
void init_mem(void);
Emulate instructions emitted by OpenBSD/i386 version 5.5: - CMP REG, r/m - MOV AX/EAX/RAX, moffset - MOV moffset, AX/EAX/RAX - PUSH r/m
2014-07-23 04:28:51 +00:00
int emulate_mem(struct vmctx *, int vcpu, uint64_t paddr, struct vie *vie,
struct vm_guest_paging *paging);
Rework how guest MMIO regions are dealt with. - New memory region interface. An RB tree holds the regions, with a last-found per-vCPU cache to deal with the common case of repeated guest accesses to MMIO registers in the same page. - Support memory-mapped BARs in PCI emulation. mem.c/h - memory region interface instruction_emul.c/h - remove old region interface. Use gpa from EPT exit to avoid a tablewalk to determine operand address. Determine operand size and use when calling through to region handler. fbsdrun.c - call into region interface on paging exit. Distinguish between instruction emul error and region not found pci_emul.c/h - implement new BAR callback api. Split BAR alloc routine into routines that require/don't require the BAR phys address. ioapic.c pci_passthru.c pci_virtio_block.c pci_virtio_net.c pci_uart.c - update to new BAR callback i/f Reviewed by: neel Obtained from: NetApp
2012-10-19 18:11:17 +00:00
int register_mem(struct mem_range *memp);
Add the ability to have a 'fallback' search for memory ranges. These set of ranges will be looked at if a standard memory range isn't found, and won't be installed in the cache. Use this to implement the memory behaviour of the PCI hole on x86 systems, where writes are ignored and reads always return -1. This allows breakpoints to be set when issuing a 'boot -d', which has the side effect of accessing the PCI hole when changing the PTE protection on kernel code, since the pmap layer hasn't been initialized (a bug, but present in existing FreeBSD releases so has to be handled). Reviewed by: neel Obtained from: NetApp
2013-02-22 00:46:32 +00:00
int register_mem_fallback(struct mem_range *memp);
Improve PCI BAR emulation: - Respect the MEMEN and PORTEN bits in the command register - Allow the guest to reprogram the address decoded by the BAR Submitted by: Gopakumar T Obtained from: NetApp
2013-04-10 02:12:39 +00:00
int unregister_mem(struct mem_range *memp);
Rework how guest MMIO regions are dealt with. - New memory region interface. An RB tree holds the regions, with a last-found per-vCPU cache to deal with the common case of repeated guest accesses to MMIO registers in the same page. - Support memory-mapped BARs in PCI emulation. mem.c/h - memory region interface instruction_emul.c/h - remove old region interface. Use gpa from EPT exit to avoid a tablewalk to determine operand address. Determine operand size and use when calling through to region handler. fbsdrun.c - call into region interface on paging exit. Distinguish between instruction emul error and region not found pci_emul.c/h - implement new BAR callback api. Split BAR alloc routine into routines that require/don't require the BAR phys address. ioapic.c pci_passthru.c pci_virtio_block.c pci_virtio_net.c pci_uart.c - update to new BAR callback i/f Reviewed by: neel Obtained from: NetApp
2012-10-19 18:11:17 +00:00
#endif /* _MEM_H_ */
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