From: Waldemar Kozaczuk <jwkozac...@gmail.com>
Committer: Nadav Har'El <n...@scylladb.com>
Branch: master
Added subset of original FreeBSD driver code for Hyper/V.
- 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 <jwkozac...@gmail.com>
Message-Id: <1499985397-3562-1-git-send-email-jwkozac...@gmail.com>
---
diff --git a/bsd/sys/dev/hyperv/include/hyperv.h
b/bsd/sys/dev/hyperv/include/hyperv.h
--- a/bsd/sys/dev/hyperv/include/hyperv.h
+++ 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
--- a/bsd/sys/dev/hyperv/include/hyperv_busdma.h
+++ 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
--- a/bsd/sys/dev/hyperv/include/vmbus.h
+++ 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
--- a/bsd/sys/dev/hyperv/include/vmbus_xact.h
+++ 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
--- a/bsd/sys/dev/hyperv/vmbus/hyperv.cc
+++ 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);
--
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