Date: Tue, 24 Nov 2015 08:41:27 +0000 (UTC) From: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= <royger@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-10@freebsd.org Subject: svn commit: r291239 - in stable/10/sys: dev/xen/blkfront dev/xen/netfront x86/xen xen Message-ID: <201511240841.tAO8fRbl021905@repo.freebsd.org>
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Author: royger Date: Tue Nov 24 08:41:27 2015 New Revision: 291239 URL: https://svnweb.freebsd.org/changeset/base/291239 Log: MFC r286999: xen: allow disabling PV disks and nics Sponsored by: Citrix Systems R&D Modified: stable/10/sys/dev/xen/blkfront/blkfront.c stable/10/sys/dev/xen/netfront/netfront.c stable/10/sys/x86/xen/hvm.c stable/10/sys/xen/xen-os.h Directory Properties: stable/10/ (props changed) Modified: stable/10/sys/dev/xen/blkfront/blkfront.c ============================================================================== --- stable/10/sys/dev/xen/blkfront/blkfront.c Tue Nov 24 08:34:48 2015 (r291238) +++ stable/10/sys/dev/xen/blkfront/blkfront.c Tue Nov 24 08:41:27 2015 (r291239) @@ -1367,6 +1367,11 @@ xbd_probe(device_t dev) if (strcmp(xenbus_get_type(dev), "vbd") != 0) return (ENXIO); +#ifdef XENHVM + if (xen_disable_pv_disks != 0) + return (ENXIO); +#endif + if (xen_hvm_domain()) { int error; char *type; Modified: stable/10/sys/dev/xen/netfront/netfront.c ============================================================================== --- stable/10/sys/dev/xen/netfront/netfront.c Tue Nov 24 08:34:48 2015 (r291238) +++ stable/10/sys/dev/xen/netfront/netfront.c Tue Nov 24 08:41:27 2015 (r291239) @@ -451,6 +451,11 @@ static int netfront_probe(device_t dev) { +#ifdef XENHVM + if (xen_disable_pv_nics != 0) + return (ENXIO); +#endif + if (!strcmp(xenbus_get_type(dev), "vif")) { device_set_desc(dev, "Virtual Network Interface"); return (0); Modified: stable/10/sys/x86/xen/hvm.c ============================================================================== --- stable/10/sys/x86/xen/hvm.c Tue Nov 24 08:34:48 2015 (r291238) +++ stable/10/sys/x86/xen/hvm.c Tue Nov 24 08:41:27 2015 (r291239) @@ -152,6 +152,13 @@ DPCPU_DEFINE(xen_intr_handle_t, ipi_hand char *hypercall_stubs; shared_info_t *HYPERVISOR_shared_info; + +/*------------------------------ Sysctl tunables -----------------------------*/ +int xen_disable_pv_disks = 0; +int xen_disable_pv_nics = 0; +TUNABLE_INT("hw.xen.disable_pv_disks", &xen_disable_pv_disks); +TUNABLE_INT("hw.xen.disable_pv_nics", &xen_disable_pv_nics); + #ifdef SMP /*---------------------------- XEN PV IPI Handlers ---------------------------*/ /* @@ -303,7 +310,7 @@ xen_ipi_vectored(u_int vector, int dest) } } -/* XEN diverged cpu operations */ +/*---------------------- XEN diverged cpu operations -------------------------*/ static void xen_hvm_cpu_resume(void) { @@ -503,12 +510,24 @@ enum { static void xen_hvm_disable_emulated_devices(void) { + u_short disable_devs = 0; + if (inw(XEN_MAGIC_IOPORT) != XMI_MAGIC) return; - if (bootverbose) - printf("XEN: Disabling emulated block and network devices\n"); - outw(XEN_MAGIC_IOPORT, XMI_UNPLUG_IDE_DISKS|XMI_UNPLUG_NICS); + if (xen_disable_pv_disks == 0) { + if (bootverbose) + printf("XEN: disabling emulated disks\n"); + disable_devs |= XMI_UNPLUG_IDE_DISKS; + } + if (xen_disable_pv_nics == 0) { + if (bootverbose) + printf("XEN: disabling emulated nics\n"); + disable_devs |= XMI_UNPLUG_NICS; + } + + if (disable_devs != 0) + outw(XEN_MAGIC_IOPORT, disable_devs); } static void Modified: stable/10/sys/xen/xen-os.h ============================================================================== --- stable/10/sys/xen/xen-os.h Tue Nov 24 08:34:48 2015 (r291238) +++ stable/10/sys/xen/xen-os.h Tue Nov 24 08:41:27 2015 (r291239) @@ -52,6 +52,11 @@ void force_evtchn_callback(void); extern shared_info_t *HYPERVISOR_shared_info; +#ifdef XENHVM +extern int xen_disable_pv_disks; +extern int xen_disable_pv_nics; +#endif + enum xen_domain_type { XEN_NATIVE, /* running on bare hardware */ XEN_PV_DOMAIN, /* running in a PV domain */
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