- added subset of original FreeBSD driver code for Hyper/V (https://github.com/freebsd/freebsd/tree/4f55a572a1ac518b3e4f5a856ec0b403fe23ed5e) for now limited to VMBus driver basic functionality and common header files. - renamed all *.c files to *.cc. - replaced tabs with spaces.
Most of this code is not necessary to make OSv boot on Hyper/V however it is included in anticipation of the network/disk support later. Signed-off-by: Waldemar Kozaczuk <[email protected]> --- bsd/sys/dev/hyperv/include/hyperv.h | 96 +++++++++ bsd/sys/dev/hyperv/include/hyperv_busdma.h | 49 +++++ bsd/sys/dev/hyperv/include/vmbus.h | 230 ++++++++++++++++++++ bsd/sys/dev/hyperv/include/vmbus_xact.h | 65 ++++++ bsd/sys/dev/hyperv/vmbus/hyperv.cc | 327 +++++++++++++++++++++++++++++ 5 files changed, 767 insertions(+) create mode 100644 bsd/sys/dev/hyperv/include/hyperv.h create mode 100644 bsd/sys/dev/hyperv/include/hyperv_busdma.h create mode 100644 bsd/sys/dev/hyperv/include/vmbus.h create mode 100644 bsd/sys/dev/hyperv/include/vmbus_xact.h create mode 100644 bsd/sys/dev/hyperv/vmbus/hyperv.cc diff --git a/bsd/sys/dev/hyperv/include/hyperv.h b/bsd/sys/dev/hyperv/include/hyperv.h new file mode 100644 index 0000000..4d0f5b7 --- /dev/null +++ b/bsd/sys/dev/hyperv/include/hyperv.h @@ -0,0 +1,96 @@ +/*- + * Copyright (c) 2009-2012,2016 Microsoft Corp. + * Copyright (c) 2012 NetApp Inc. + * Copyright (c) 2012 Citrix 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 unmodified, 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 THE AUTHOR ``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 THE AUTHOR 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 _HYPERV_H_ +#define _HYPERV_H_ + +#ifdef _KERNEL + +#include <sys/param.h> +#include <sys/systm.h> + +#define MSR_HV_TIME_REF_COUNT 0x40000020 + +#define CPUID_HV_MSR_TIME_REFCNT 0x0002 /* MSR_HV_TIME_REF_COUNT */ +#define CPUID_HV_MSR_SYNIC 0x0004 /* MSRs for SynIC */ +#define CPUID_HV_MSR_SYNTIMER 0x0008 /* MSRs for SynTimer */ +#define CPUID_HV_MSR_APIC 0x0010 /* MSR_HV_{EOI,ICR,TPR} */ +#define CPUID_HV_MSR_HYPERCALL 0x0020 /* MSR_HV_GUEST_OS_ID + * MSR_HV_HYPERCALL */ +#define CPUID_HV_MSR_VP_INDEX 0x0040 /* MSR_HV_VP_INDEX */ +#define CPUID_HV_MSR_REFERENCE_TSC 0x0200 /* MSR_HV_REFERENCE_TSC */ +#define CPUID_HV_MSR_GUEST_IDLE 0x0400 /* MSR_HV_GUEST_IDLE */ + +#ifndef NANOSEC +#define NANOSEC 1000000000ULL +#endif +#define HYPERV_TIMER_NS_FACTOR 100ULL +#define HYPERV_TIMER_FREQ (NANOSEC / HYPERV_TIMER_NS_FACTOR) + +#endif /* _KERNEL */ + +#define HYPERV_REFTSC_DEVNAME "hv_tsc" + +/* + * Hyper-V Reference TSC + */ +struct hyperv_reftsc { + volatile uint32_t tsc_seq; + volatile uint32_t tsc_rsvd1; + volatile uint64_t tsc_scale; + volatile int64_t tsc_ofs; +} __packed __aligned(PAGE_SIZE); +#ifdef CTASSERT +CTASSERT(sizeof(struct hyperv_reftsc) == PAGE_SIZE); +#endif + +#ifdef _KERNEL + +struct hyperv_guid { + uint8_t hv_guid[16]; +} __packed; + +#define HYPERV_GUID_STRLEN 40 + +typedef uint64_t (*hyperv_tc64_t)(void); + +int hyperv_guid2str(const struct hyperv_guid *, char *, + size_t); + +/* + * hyperv_tc64 could be NULL, if there were no suitable Hyper-V + * specific timecounter. + */ +extern hyperv_tc64_t hyperv_tc64; +extern u_int hyperv_features; /* CPUID_HV_MSR_ */ + +#endif /* _KERNEL */ + +#endif /* _HYPERV_H_ */ diff --git a/bsd/sys/dev/hyperv/include/hyperv_busdma.h b/bsd/sys/dev/hyperv/include/hyperv_busdma.h new file mode 100644 index 0000000..e978827 --- /dev/null +++ b/bsd/sys/dev/hyperv/include/hyperv_busdma.h @@ -0,0 +1,49 @@ +/*- + * Copyright (c) 2016 Microsoft Corp. + * 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 unmodified, 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 THE AUTHOR ``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 THE AUTHOR 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 _HYPERV_BUSDMA_H_ +#define _HYPERV_BUSDMA_H_ + +#include <sys/param.h> +#include <sys/bus.h> +#include <machine/bus.h> + +struct hyperv_dma { + bus_addr_t hv_paddr; + bus_dma_tag_t hv_dtag; + bus_dmamap_t hv_dmap; +}; + +void hyperv_dma_map_paddr(void *arg, bus_dma_segment_t *segs, + int nseg, int error); +void *hyperv_dmamem_alloc(bus_dma_tag_t parent_dtag, + bus_size_t alignment, bus_addr_t boundary, bus_size_t size, + struct hyperv_dma *dma, int flags); +void hyperv_dmamem_free(struct hyperv_dma *dma, void *ptr); + +#endif /* !_HYPERV_BUSDMA_H_ */ diff --git a/bsd/sys/dev/hyperv/include/vmbus.h b/bsd/sys/dev/hyperv/include/vmbus.h new file mode 100644 index 0000000..73c4561 --- /dev/null +++ b/bsd/sys/dev/hyperv/include/vmbus.h @@ -0,0 +1,230 @@ +/*- + * Copyright (c) 2016 Microsoft Corp. + * 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 unmodified, 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 THE AUTHOR ``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 THE AUTHOR 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 _VMBUS_H_ +#define _VMBUS_H_ + +#include <sys/param.h> +#include <sys/bus.h> + +/* + * VMBUS version is 32 bit, upper 16 bit for major_number and lower + * 16 bit for minor_number. + * + * 0.13 -- Windows Server 2008 + * 1.1 -- Windows 7 + * 2.4 -- Windows 8 + * 3.0 -- Windows 8.1 + */ +#define VMBUS_VERSION_WS2008 ((0 << 16) | (13)) +#define VMBUS_VERSION_WIN7 ((1 << 16) | (1)) +#define VMBUS_VERSION_WIN8 ((2 << 16) | (4)) +#define VMBUS_VERSION_WIN8_1 ((3 << 16) | (0)) + +#define VMBUS_VERSION_MAJOR(ver) (((uint32_t)(ver)) >> 16) +#define VMBUS_VERSION_MINOR(ver) (((uint32_t)(ver)) & 0xffff) + +#define VMBUS_CHAN_POLLHZ_MIN 100 /* 10ms interval */ +#define VMBUS_CHAN_POLLHZ_MAX 1000000 /* 1us interval */ + +/* + * GPA stuffs. + */ +struct vmbus_gpa_range { + uint32_t gpa_len; + uint32_t gpa_ofs; + uint64_t gpa_page[0]; +} __packed; + +/* This is actually vmbus_gpa_range.gpa_page[1] */ +struct vmbus_gpa { + uint32_t gpa_len; + uint32_t gpa_ofs; + uint64_t gpa_page; +} __packed; + +#define VMBUS_CHANPKT_SIZE_SHIFT 3 + +#define VMBUS_CHANPKT_GETLEN(pktlen) \ + (((int)(pktlen)) << VMBUS_CHANPKT_SIZE_SHIFT) + +struct vmbus_chanpkt_hdr { + uint16_t cph_type; /* VMBUS_CHANPKT_TYPE_ */ + uint16_t cph_hlen; /* header len, in 8 bytes */ + uint16_t cph_tlen; /* total len, in 8 bytes */ + uint16_t cph_flags; /* VMBUS_CHANPKT_FLAG_ */ + uint64_t cph_xactid; +} __packed; + +#define VMBUS_CHANPKT_TYPE_INBAND 0x0006 +#define VMBUS_CHANPKT_TYPE_RXBUF 0x0007 +#define VMBUS_CHANPKT_TYPE_GPA 0x0009 +#define VMBUS_CHANPKT_TYPE_COMP 0x000b + +#define VMBUS_CHANPKT_FLAG_NONE 0 +#define VMBUS_CHANPKT_FLAG_RC 0x0001 /* report completion */ + +#define VMBUS_CHANPKT_CONST_DATA(pkt) \ + (const void *)((const uint8_t *)(pkt) + \ + VMBUS_CHANPKT_GETLEN((pkt)->cph_hlen)) + +/* Include padding */ +#define VMBUS_CHANPKT_DATALEN(pkt) \ + (VMBUS_CHANPKT_GETLEN((pkt)->cph_tlen) -\ + VMBUS_CHANPKT_GETLEN((pkt)->cph_hlen)) + +struct vmbus_rxbuf_desc { + uint32_t rb_len; + uint32_t rb_ofs; +} __packed; + +struct vmbus_chanpkt_rxbuf { + struct vmbus_chanpkt_hdr cp_hdr; + uint16_t cp_rxbuf_id; + uint16_t cp_rsvd; + uint32_t cp_rxbuf_cnt; + struct vmbus_rxbuf_desc cp_rxbuf[]; +} __packed; + +struct vmbus_chan_br { + void *cbr; + bus_addr_t cbr_paddr; + int cbr_txsz; + int cbr_rxsz; +}; + +struct vmbus_channel; +struct vmbus_xact; +struct vmbus_xact_ctx; +struct hyperv_guid; +struct task; +struct taskqueue; + +typedef void (*vmbus_chan_callback_t)(struct vmbus_channel *, void *); + +static __inline struct vmbus_channel * +vmbus_get_channel(device_t dev) +{ + return device_get_ivars(dev); +} + +/* + * vmbus_chan_open_br() + * + * Return values: + * 0 Succeeded. + * EISCONN Failed, and the memory passed through 'br' is still + * connected. Callers must _not_ free the the memory + * passed through 'br', if this error happens. + * other values Failed. The memory passed through 'br' is no longer + * connected. Callers are free to do anything with the + * memory passed through 'br'. + * + * + * + * vmbus_chan_close_direct() + * + * NOTE: + * Callers of this function _must_ make sure to close all sub-channels before + * closing the primary channel. + * + * Return values: + * 0 Succeeded. + * EISCONN Failed, and the memory associated with the bufring + * is still connected. Callers must _not_ free the the + * memory associated with the bufring, if this error + * happens. + * other values Failed. The memory associated with the bufring is + * no longer connected. Callers are free to do anything + * with the memory associated with the bufring. + */ +int vmbus_chan_open(struct vmbus_channel *chan, + int txbr_size, int rxbr_size, const void *udata, int udlen, + vmbus_chan_callback_t cb, void *cbarg); +int vmbus_chan_open_br(struct vmbus_channel *chan, + const struct vmbus_chan_br *cbr, const void *udata, + int udlen, vmbus_chan_callback_t cb, void *cbarg); +void vmbus_chan_close(struct vmbus_channel *chan); +int vmbus_chan_close_direct(struct vmbus_channel *chan); +void vmbus_chan_intr_drain(struct vmbus_channel *chan); +void vmbus_chan_run_task(struct vmbus_channel *chan, + struct task *task); +void vmbus_chan_set_orphan(struct vmbus_channel *chan, + struct vmbus_xact_ctx *); +void vmbus_chan_unset_orphan(struct vmbus_channel *chan); +const void *vmbus_chan_xact_wait(const struct vmbus_channel *chan, + struct vmbus_xact *xact, size_t *resp_len, bool can_sleep); + +int vmbus_chan_gpadl_connect(struct vmbus_channel *chan, + bus_addr_t paddr, int size, uint32_t *gpadl); +int vmbus_chan_gpadl_disconnect(struct vmbus_channel *chan, + uint32_t gpadl); + +void vmbus_chan_cpu_set(struct vmbus_channel *chan, int cpu); +void vmbus_chan_cpu_rr(struct vmbus_channel *chan); +void vmbus_chan_set_readbatch(struct vmbus_channel *chan, bool on); + +struct vmbus_channel ** + vmbus_subchan_get(struct vmbus_channel *pri_chan, + int subchan_cnt); +void vmbus_subchan_rel(struct vmbus_channel **subchan, + int subchan_cnt); +void vmbus_subchan_drain(struct vmbus_channel *pri_chan); + +int vmbus_chan_recv(struct vmbus_channel *chan, void *data, int *dlen, + uint64_t *xactid); +int vmbus_chan_recv_pkt(struct vmbus_channel *chan, + struct vmbus_chanpkt_hdr *pkt, int *pktlen); + +int vmbus_chan_send(struct vmbus_channel *chan, uint16_t type, + uint16_t flags, void *data, int dlen, uint64_t xactid); +int vmbus_chan_send_sglist(struct vmbus_channel *chan, + struct vmbus_gpa sg[], int sglen, void *data, int dlen, + uint64_t xactid); +int vmbus_chan_send_prplist(struct vmbus_channel *chan, + struct vmbus_gpa_range *prp, int prp_cnt, void *data, + int dlen, uint64_t xactid); + +uint32_t vmbus_chan_id(const struct vmbus_channel *chan); +uint32_t vmbus_chan_subidx(const struct vmbus_channel *chan); +bool vmbus_chan_is_primary(const struct vmbus_channel *chan); +bool vmbus_chan_is_revoked(const struct vmbus_channel *chan); +const struct hyperv_guid * + vmbus_chan_guid_inst(const struct vmbus_channel *chan); +int vmbus_chan_prplist_nelem(int br_size, int prpcnt_max, + int dlen_max); +bool vmbus_chan_rx_empty(const struct vmbus_channel *chan); +bool vmbus_chan_tx_empty(const struct vmbus_channel *chan); +struct taskqueue * + vmbus_chan_mgmt_tq(const struct vmbus_channel *chan); + +void vmbus_chan_poll_enable(struct vmbus_channel *chan, + u_int pollhz); +void vmbus_chan_poll_disable(struct vmbus_channel *chan); + +#endif /* !_VMBUS_H_ */ diff --git a/bsd/sys/dev/hyperv/include/vmbus_xact.h b/bsd/sys/dev/hyperv/include/vmbus_xact.h new file mode 100644 index 0000000..f529945 --- /dev/null +++ b/bsd/sys/dev/hyperv/include/vmbus_xact.h @@ -0,0 +1,65 @@ +/*- + * Copyright (c) 2016 Microsoft Corp. + * 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 unmodified, 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 THE AUTHOR ``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 THE AUTHOR 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 _VMBUS_XACT_H_ +#define _VMBUS_XACT_H_ + +#include <sys/param.h> +#include <sys/bus.h> + +struct vmbus_xact; +struct vmbus_xact_ctx; + +struct vmbus_xact_ctx *vmbus_xact_ctx_create(bus_dma_tag_t dtag, + size_t req_size, size_t resp_size, + size_t priv_size); +void vmbus_xact_ctx_destroy(struct vmbus_xact_ctx *ctx); +bool vmbus_xact_ctx_orphan(struct vmbus_xact_ctx *ctx); + +struct vmbus_xact *vmbus_xact_get(struct vmbus_xact_ctx *ctx, + size_t req_len); +void vmbus_xact_put(struct vmbus_xact *xact); + +void *vmbus_xact_req_data(const struct vmbus_xact *xact); +bus_addr_t vmbus_xact_req_paddr(const struct vmbus_xact *xact); +void *vmbus_xact_priv(const struct vmbus_xact *xact, + size_t priv_len); +void vmbus_xact_activate(struct vmbus_xact *xact); +void vmbus_xact_deactivate(struct vmbus_xact *xact); +const void *vmbus_xact_wait(struct vmbus_xact *xact, + size_t *resp_len); +const void *vmbus_xact_busywait(struct vmbus_xact *xact, + size_t *resp_len); +const void *vmbus_xact_poll(struct vmbus_xact *xact, + size_t *resp_len); +void vmbus_xact_wakeup(struct vmbus_xact *xact, + const void *data, size_t dlen); +void vmbus_xact_ctx_wakeup(struct vmbus_xact_ctx *ctx, + const void *data, size_t dlen); + +#endif /* !_VMBUS_XACT_H_ */ diff --git a/bsd/sys/dev/hyperv/vmbus/hyperv.cc b/bsd/sys/dev/hyperv/vmbus/hyperv.cc new file mode 100644 index 0000000..757672a --- /dev/null +++ b/bsd/sys/dev/hyperv/vmbus/hyperv.cc @@ -0,0 +1,327 @@ +/*- + * Copyright (c) 2009-2012,2016 Microsoft Corp. + * Copyright (c) 2012 NetApp Inc. + * Copyright (c) 2012 Citrix 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 unmodified, 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 THE AUTHOR ``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 THE AUTHOR 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. + */ + +/** + * Implements low-level interactions with Hypver-V/Azure + */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/systm.h> +#include <sys/timetc.h> + +#include <dev/hyperv/include/hyperv.h> +#include <dev/hyperv/include/hyperv_busdma.h> +#include <dev/hyperv/vmbus/hyperv_machdep.h> +#include <dev/hyperv/vmbus/hyperv_reg.h> +#include <dev/hyperv/vmbus/hyperv_var.h> + +#define HYPERV_FREEBSD_BUILD 0ULL +#define HYPERV_FREEBSD_VERSION ((uint64_t)__FreeBSD_version) +#define HYPERV_FREEBSD_OSID 0ULL + +#define MSR_HV_GUESTID_BUILD_FREEBSD \ + (HYPERV_FREEBSD_BUILD & MSR_HV_GUESTID_BUILD_MASK) +#define MSR_HV_GUESTID_VERSION_FREEBSD \ + ((HYPERV_FREEBSD_VERSION << MSR_HV_GUESTID_VERSION_SHIFT) & \ + MSR_HV_GUESTID_VERSION_MASK) +#define MSR_HV_GUESTID_OSID_FREEBSD \ + ((HYPERV_FREEBSD_OSID << MSR_HV_GUESTID_OSID_SHIFT) & \ + MSR_HV_GUESTID_OSID_MASK) + +#define MSR_HV_GUESTID_FREEBSD \ + (MSR_HV_GUESTID_BUILD_FREEBSD | \ + MSR_HV_GUESTID_VERSION_FREEBSD | \ + MSR_HV_GUESTID_OSID_FREEBSD | \ + MSR_HV_GUESTID_OSTYPE_FREEBSD) + +struct hypercall_ctx { + void *hc_addr; + struct hyperv_dma hc_dma; +}; + +static u_int hyperv_get_timecount(struct timecounter *); +static bool hyperv_identify(void); +static void hypercall_memfree(void); + +u_int hyperv_features; +u_int hyperv_recommends; + +static u_int hyperv_pm_features; +static u_int hyperv_features3; + +hyperv_tc64_t hyperv_tc64; + +static struct timecounter hyperv_timecounter = { + .tc_get_timecount = hyperv_get_timecount, + .tc_poll_pps = NULL, + .tc_counter_mask = 0xffffffff, + .tc_frequency = HYPERV_TIMER_FREQ, + .tc_name = "Hyper-V", + .tc_quality = 2000, + .tc_flags = 0, + .tc_priv = NULL +}; + +static struct hypercall_ctx hypercall_context; + +static u_int +hyperv_get_timecount(struct timecounter *tc __unused) +{ + return rdmsr(MSR_HV_TIME_REF_COUNT); +} + +static uint64_t +hyperv_tc64_rdmsr(void) +{ + + return (rdmsr(MSR_HV_TIME_REF_COUNT)); +} + +uint64_t +hypercall_post_message(bus_addr_t msg_paddr) +{ + return hypercall_md(hypercall_context.hc_addr, + HYPERCALL_POST_MESSAGE, msg_paddr, 0); +} + +uint64_t +hypercall_signal_event(bus_addr_t monprm_paddr) +{ + return hypercall_md(hypercall_context.hc_addr, + HYPERCALL_SIGNAL_EVENT, monprm_paddr, 0); +} + +int +hyperv_guid2str(const struct hyperv_guid *guid, char *buf, size_t sz) +{ + const uint8_t *d = guid->hv_guid; + + return snprintf(buf, sz, "%02x%02x%02x%02x-" + "%02x%02x-%02x%02x-%02x%02x-" + "%02x%02x%02x%02x%02x%02x", + d[3], d[2], d[1], d[0], + d[5], d[4], d[7], d[6], d[8], d[9], + d[10], d[11], d[12], d[13], d[14], d[15]); +} + +static bool +hyperv_identify(void) +{ + u_int regs[4]; + unsigned int maxleaf; + + if (vm_guest != VM_GUEST_HV) + return (false); + + do_cpuid(CPUID_LEAF_HV_MAXLEAF, regs); + maxleaf = regs[0]; + if (maxleaf < CPUID_LEAF_HV_LIMITS) + return (false); + + do_cpuid(CPUID_LEAF_HV_INTERFACE, regs); + if (regs[0] != CPUID_HV_IFACE_HYPERV) + return (false); + + do_cpuid(CPUID_LEAF_HV_FEATURES, regs); + if ((regs[0] & CPUID_HV_MSR_HYPERCALL) == 0) { + /* + * Hyper-V w/o Hypercall is impossible; someone + * is faking Hyper-V. + */ + return (false); + } + hyperv_features = regs[0]; + hyperv_pm_features = regs[2]; + hyperv_features3 = regs[3]; + + do_cpuid(CPUID_LEAF_HV_IDENTITY, regs); + printf("Hyper-V Version: %d.%d.%d [SP%d]\n", + regs[1] >> 16, regs[1] & 0xffff, regs[0], regs[2]); + + printf(" Features=0x%b\n", hyperv_features, + "\020" + "\001VPRUNTIME" /* MSR_HV_VP_RUNTIME */ + "\002TMREFCNT" /* MSR_HV_TIME_REF_COUNT */ + "\003SYNIC" /* MSRs for SynIC */ + "\004SYNTM" /* MSRs for SynTimer */ + "\005APIC" /* MSR_HV_{EOI,ICR,TPR} */ + "\006HYPERCALL" /* MSR_HV_{GUEST_OS_ID,HYPERCALL} */ + "\007VPINDEX" /* MSR_HV_VP_INDEX */ + "\010RESET" /* MSR_HV_RESET */ + "\011STATS" /* MSR_HV_STATS_ */ + "\012REFTSC" /* MSR_HV_REFERENCE_TSC */ + "\013IDLE" /* MSR_HV_GUEST_IDLE */ + "\014TMFREQ" /* MSR_HV_{TSC,APIC}_FREQUENCY */ + "\015DEBUG"); /* MSR_HV_SYNTH_DEBUG_ */ + printf(" PM Features=0x%b [C%u]\n", + (hyperv_pm_features & ~CPUPM_HV_CSTATE_MASK), + "\020" + "\005C3HPET", /* HPET is required for C3 state */ + CPUPM_HV_CSTATE(hyperv_pm_features)); + printf(" Features3=0x%b\n", hyperv_features3, + "\020" + "\001MWAIT" /* MWAIT */ + "\002DEBUG" /* guest debug support */ + "\003PERFMON" /* performance monitor */ + "\004PCPUDPE" /* physical CPU dynamic partition event */ + "\005XMMHC" /* hypercall input through XMM regs */ + "\006IDLE" /* guest idle support */ + "\007SLEEP" /* hypervisor sleep support */ + "\010NUMA" /* NUMA distance query support */ + "\011TMFREQ" /* timer frequency query (TSC, LAPIC) */ + "\012SYNCMC" /* inject synthetic machine checks */ + "\013CRASH" /* MSRs for guest crash */ + "\014DEBUGMSR" /* MSRs for guest debug */ + "\015NPIEP" /* NPIEP */ + "\016HVDIS"); /* disabling hypervisor */ + + do_cpuid(CPUID_LEAF_HV_RECOMMENDS, regs); + hyperv_recommends = regs[0]; + if (bootverbose) + printf(" Recommends: %08x %08x\n", regs[0], regs[1]); + + do_cpuid(CPUID_LEAF_HV_LIMITS, regs); + if (bootverbose) { + printf(" Limits: Vcpu:%d Lcpu:%d Int:%d\n", + regs[0], regs[1], regs[2]); + } + + if (maxleaf >= CPUID_LEAF_HV_HWFEATURES) { + do_cpuid(CPUID_LEAF_HV_HWFEATURES, regs); + if (bootverbose) { + printf(" HW Features: %08x, AMD: %08x\n", + regs[0], regs[3]); + } + } + + return (true); +} + +static void +hyperv_init(void *dummy __unused) +{ + if (!hyperv_identify()) { + /* Not Hyper-V; reset guest id to the generic one. */ + if (vm_guest == VM_GUEST_HV) + vm_guest = VM_GUEST_VM; + return; + } + + /* Set guest id */ + wrmsr(MSR_HV_GUEST_OS_ID, MSR_HV_GUESTID_FREEBSD); + + if (hyperv_features & CPUID_HV_MSR_TIME_REFCNT) { + /* Register Hyper-V timecounter */ + tc_init(&hyperv_timecounter); + + /* + * Install 64 bits timecounter method for other modules + * to use. + */ + hyperv_tc64 = hyperv_tc64_rdmsr; + } +} +SYSINIT(hyperv_initialize, SI_SUB_HYPERVISOR, SI_ORDER_FIRST, hyperv_init, + NULL); + +static void +hypercall_memfree(void) +{ + hyperv_dmamem_free(&hypercall_context.hc_dma, + hypercall_context.hc_addr); + hypercall_context.hc_addr = NULL; +} + +static void +hypercall_create(void *arg __unused) +{ + uint64_t hc, hc_orig; + + if (vm_guest != VM_GUEST_HV) + return; + + hypercall_context.hc_addr = hyperv_dmamem_alloc(NULL, PAGE_SIZE, 0, + PAGE_SIZE, &hypercall_context.hc_dma, BUS_DMA_WAITOK); + if (hypercall_context.hc_addr == NULL) { + printf("hyperv: Hypercall page allocation failed\n"); + /* Can't perform any Hyper-V specific actions */ + vm_guest = VM_GUEST_VM; + return; + } + + /* Get the 'reserved' bits, which requires preservation. */ + hc_orig = rdmsr(MSR_HV_HYPERCALL); + + /* + * Setup the Hypercall page. + * + * NOTE: 'reserved' bits MUST be preserved. + */ + hc = ((hypercall_context.hc_dma.hv_paddr >> PAGE_SHIFT) << + MSR_HV_HYPERCALL_PGSHIFT) | + (hc_orig & MSR_HV_HYPERCALL_RSVD_MASK) | + MSR_HV_HYPERCALL_ENABLE; + wrmsr(MSR_HV_HYPERCALL, hc); + + /* + * Confirm that Hypercall page did get setup. + */ + hc = rdmsr(MSR_HV_HYPERCALL); + if ((hc & MSR_HV_HYPERCALL_ENABLE) == 0) { + printf("hyperv: Hypercall setup failed\n"); + hypercall_memfree(); + /* Can't perform any Hyper-V specific actions */ + vm_guest = VM_GUEST_VM; + return; + } + if (bootverbose) + printf("hyperv: Hypercall created\n"); +} +SYSINIT(hypercall_ctor, SI_SUB_DRIVERS, SI_ORDER_FIRST, hypercall_create, NULL); + +static void +hypercall_destroy(void *arg __unused) +{ + uint64_t hc; + + if (hypercall_context.hc_addr == NULL) + return; + + /* Disable Hypercall */ + hc = rdmsr(MSR_HV_HYPERCALL); + wrmsr(MSR_HV_HYPERCALL, (hc & MSR_HV_HYPERCALL_RSVD_MASK)); + hypercall_memfree(); + + if (bootverbose) + printf("hyperv: Hypercall destroyed\n"); +} +SYSUNINIT(hypercall_dtor, SI_SUB_DRIVERS, SI_ORDER_FIRST, hypercall_destroy, + NULL); -- 2.7.4 -- You received this message because you are subscribed to the Google Groups "OSv Development" group. 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