Author: sephe Date: Mon May 23 07:06:53 2016 New Revision: 300480 URL: https://svnweb.freebsd.org/changeset/base/300480
Log: hyperv: Move Hypercall setup to an early place. It does not belong to the vmbus. While I'm here rework the Hypercall setup, e.g. use busdma(9) and avoid bit fields. Discussed with: Jun Su <junsu microsoft com> MFC after: 1 week Sponsored by: Microsoft OSTC Differential Revision: https://reviews.freebsd.org/D6445 Added: head/sys/dev/hyperv/vmbus/hyperv_reg.h (contents, props changed) Modified: head/sys/dev/hyperv/vmbus/hv_hv.c head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c head/sys/dev/hyperv/vmbus/hv_vmbus_priv.h Modified: head/sys/dev/hyperv/vmbus/hv_hv.c ============================================================================== --- head/sys/dev/hyperv/vmbus/hv_hv.c Mon May 23 06:52:42 2016 (r300479) +++ head/sys/dev/hyperv/vmbus/hv_hv.c Mon May 23 07:06:53 2016 (r300480) @@ -43,8 +43,9 @@ __FBSDID("$FreeBSD$"); #include <vm/vm_param.h> #include <vm/pmap.h> - -#include "hv_vmbus_priv.h" +#include <dev/hyperv/include/hyperv_busdma.h> +#include <dev/hyperv/vmbus/hv_vmbus_priv.h> +#include <dev/hyperv/vmbus/hyperv_reg.h> #define HV_NANOSECONDS_PER_SEC 1000000000L @@ -79,6 +80,13 @@ __FBSDID("$FreeBSD$"); (((uint64_t)__FreeBSD_version) << 16) | \ ((uint64_t)((id) & 0x00ffff))) +struct hypercall_ctx { + void *hc_addr; + struct hyperv_dma hc_dma; +}; + +static struct hypercall_ctx hypercall_context; + static u_int hv_get_timecount(struct timecounter *tc); u_int hyperv_features; @@ -92,7 +100,6 @@ static u_int hyperv_features3; */ hv_vmbus_context hv_vmbus_g_context = { .syn_ic_initialized = FALSE, - .hypercall_page = NULL, }; static struct timecounter hv_timecounter = { @@ -116,7 +123,7 @@ hv_vmbus_do_hypercall(uint64_t control, uint64_t hv_status = 0; uint64_t input_address = (input) ? hv_get_phys_addr(input) : 0; uint64_t output_address = (output) ? hv_get_phys_addr(output) : 0; - volatile void* hypercall_page = hv_vmbus_g_context.hypercall_page; + volatile void *hypercall_page = hypercall_context.hc_addr; __asm__ __volatile__ ("mov %0, %%r8" : : "r" (output_address): "r8"); __asm__ __volatile__ ("call *%3" : "=a"(hv_status): @@ -134,7 +141,7 @@ hv_vmbus_do_hypercall(uint64_t control, uint64_t output_address = (output) ? hv_get_phys_addr(output) : 0; uint32_t output_address_high = output_address >> 32; uint32_t output_address_low = output_address & 0xFFFFFFFF; - volatile void* hypercall_page = hv_vmbus_g_context.hypercall_page; + volatile void *hypercall_page = hypercall_context.hc_addr; __asm__ __volatile__ ("call *%8" : "=d"(hv_status_high), "=a"(hv_status_low) : "d" (control_high), @@ -147,84 +154,6 @@ hv_vmbus_do_hypercall(uint64_t control, } /** - * @brief Main initialization routine. - * - * This routine must be called - * before any other routines in here are called - */ -int -hv_vmbus_init(void) -{ - hv_vmbus_x64_msr_hypercall_contents hypercall_msr; - void* virt_addr = NULL; - - memset( - hv_vmbus_g_context.syn_ic_event_page, - 0, - sizeof(hv_vmbus_handle) * MAXCPU); - - memset( - hv_vmbus_g_context.syn_ic_msg_page, - 0, - sizeof(hv_vmbus_handle) * MAXCPU); - - if (vm_guest != VM_GUEST_HV) - goto cleanup; - - /* - * See if the hypercall page is already set - */ - hypercall_msr.as_uint64_t = rdmsr(HV_X64_MSR_HYPERCALL); - virt_addr = malloc(PAGE_SIZE, M_DEVBUF, M_WAITOK | M_ZERO); - - hypercall_msr.u.enable = 1; - hypercall_msr.u.guest_physical_address = - (hv_get_phys_addr(virt_addr) >> PAGE_SHIFT); - wrmsr(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64_t); - - /* - * Confirm that hypercall page did get set up - */ - hypercall_msr.as_uint64_t = 0; - hypercall_msr.as_uint64_t = rdmsr(HV_X64_MSR_HYPERCALL); - - if (!hypercall_msr.u.enable) - goto cleanup; - - hv_vmbus_g_context.hypercall_page = virt_addr; - - return (0); - - cleanup: - if (virt_addr != NULL) { - if (hypercall_msr.u.enable) { - hypercall_msr.as_uint64_t = 0; - wrmsr(HV_X64_MSR_HYPERCALL, - hypercall_msr.as_uint64_t); - } - - free(virt_addr, M_DEVBUF); - } - return (ENOTSUP); -} - -/** - * @brief Cleanup routine, called normally during driver unloading or exiting - */ -void -hv_vmbus_cleanup(void) -{ - if (hv_vmbus_g_context.hypercall_page != NULL) { - hv_vmbus_x64_msr_hypercall_contents hypercall_msr; - - hypercall_msr.as_uint64_t = 0; - wrmsr(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64_t); - free(hv_vmbus_g_context.hypercall_page, M_DEVBUF); - hv_vmbus_g_context.hypercall_page = NULL; - } -} - -/** * @brief Post a message using the hypervisor message IPC. * (This involves a hypercall.) */ @@ -304,9 +233,6 @@ hv_vmbus_synic_init(void *arg) cpu = PCPU_GET(cpuid); - if (hv_vmbus_g_context.hypercall_page == NULL) - return; - /* * TODO: Check the version */ @@ -537,3 +463,74 @@ hyperv_init(void *dummy __unused) } 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) +{ + if (hypercall_context.hc_addr == NULL) + return; + + /* Disable Hypercall */ + wrmsr(MSR_HV_HYPERCALL, 0); + hypercall_memfree(); + + if (bootverbose) + printf("hyperv: Hypercall destroyed\n"); +} +SYSUNINIT(hypercall_dtor, SI_SUB_DRIVERS, SI_ORDER_FIRST, hypercall_destroy, + NULL); Modified: head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c ============================================================================== --- head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c Mon May 23 06:52:42 2016 (r300479) +++ head/sys/dev/hyperv/vmbus/hv_vmbus_drv_freebsd.c Mon May 23 07:06:53 2016 (r300480) @@ -349,7 +349,7 @@ static int vmbus_probe(device_t dev) { if (ACPI_ID_PROBE(device_get_parent(dev), dev, vmbus_ids) == NULL || - device_get_unit(dev) != 0) + device_get_unit(dev) != 0 || vm_guest != VM_GUEST_HV) return (ENXIO); device_set_desc(dev, "Hyper-V Vmbus"); @@ -385,14 +385,6 @@ vmbus_bus_init(void) vmbus_inited = 1; sc = vmbus_get_softc(); - ret = hv_vmbus_init(); - - if (ret) { - if(bootverbose) - printf("Error VMBUS: Hypervisor Initialization Failed!\n"); - return (ret); - } - /* * Find a free IDT slot for vmbus callback. */ @@ -401,6 +393,7 @@ vmbus_bus_init(void) if(bootverbose) printf("Error VMBUS: Cannot find free IDT slot for " "vmbus callback!\n"); + ret = ENXIO; goto cleanup; } @@ -504,8 +497,6 @@ vmbus_bus_init(void) lapic_ipi_free(hv_vmbus_g_context.hv_cb_vector); cleanup: - hv_vmbus_cleanup(); - return (ret); } @@ -578,8 +569,6 @@ vmbus_detach(device_t dev) free(setup_args.page_buffers[i], M_DEVBUF); } - hv_vmbus_cleanup(); - /* remove swi */ CPU_FOREACH(i) { if (hv_vmbus_g_context.hv_event_queue[i] != NULL) { Modified: head/sys/dev/hyperv/vmbus/hv_vmbus_priv.h ============================================================================== --- head/sys/dev/hyperv/vmbus/hv_vmbus_priv.h Mon May 23 06:52:42 2016 (r300479) +++ head/sys/dev/hyperv/vmbus/hv_vmbus_priv.h Mon May 23 07:06:53 2016 (r300480) @@ -198,7 +198,6 @@ enum { #define HV_HYPERCALL_PARAM_ALIGN sizeof(uint64_t) typedef struct { - void* hypercall_page; hv_bool_uint8_t syn_ic_initialized; hv_vmbus_handle syn_ic_msg_page[MAXCPU]; @@ -722,8 +721,6 @@ hv_vmbus_channel* hv_vmbus_allocate_chan void hv_vmbus_free_vmbus_channel(hv_vmbus_channel *channel); int hv_vmbus_request_channel_offers(void); void hv_vmbus_release_unattached_channels(void); -int hv_vmbus_init(void); -void hv_vmbus_cleanup(void); uint16_t hv_vmbus_post_msg_via_msg_ipc( hv_vmbus_connection_id connection_id, Added: head/sys/dev/hyperv/vmbus/hyperv_reg.h ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/sys/dev/hyperv/vmbus/hyperv_reg.h Mon May 23 07:06:53 2016 (r300480) @@ -0,0 +1,37 @@ +/*- + * 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_REG_H_ +#define _HYPERV_REG_H_ + +#define MSR_HV_HYPERCALL 0x40000001 +#define MSR_HV_HYPERCALL_ENABLE 0x0001ULL +#define MSR_HV_HYPERCALL_RSVD_MASK 0x0ffeULL +#define MSR_HV_HYPERCALL_PGSHIFT 12 + +#endif /* !_HYPERV_REG_H_ */ _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
