diff options
author | Roger Pau Monné <royger@FreeBSD.org> | 2014-03-11 10:07:01 +0000 |
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committer | Roger Pau Monné <royger@FreeBSD.org> | 2014-03-11 10:07:01 +0000 |
commit | 1a9cdd373a6a40539668898b8b32d5cb16103149 (patch) | |
tree | 6272bb4211bd811ce759def6aa759b755cd86415 /sys | |
parent | e8da1c4877388cd5c76e9815d9edb27b7f9cd443 (diff) | |
download | src-1a9cdd373a6a40539668898b8b32d5cb16103149.tar.gz src-1a9cdd373a6a40539668898b8b32d5cb16103149.zip |
xen: add PV/PVH kernel entry point
Add the PV/PVH entry point and the low level functions for PVH
early initialization.
Approved by: gibbs
Sponsored by: Citrix Systems R&D
amd64/amd64/genassym.c:
- Add __FreeBSD_version define to assym.s so it can be used for the
Xen notes.
amd64/amd64/locore.S:
- Make bootstack global so it can be used from Xen kernel entry
point.
amd64/amd64/xen-locore.S:
- Add Xen notes to the kernel.
- Add the Xen PV entry point, that is going to call hammer_time_xen.
amd64/include/asmacros.h:
- Add ELFNOTE macros.
i386/xen/xen_machdep.c:
- Define HYPERVISOR_start_info for the XEN i386 PV port, which is
going to be used in some shared code between PV and PVH.
x86/xen/hvm.c:
- Define HYPERVISOR_start_info for the PVH port.
x86/xen/pv.c:
- Introduce hammer_time_xen which is going to perform early setup for
Xen PVH:
- Setup shared Xen variables start_info, shared_info and
xen_store.
- Set guest type.
- Create initial page tables as FreeBSD expects to find them.
- Call into native init function (hammer_time).
xen/xen-os.h:
- Declare HYPERVISOR_start_info.
conf/files.amd64:
- Add amd64/amd64/locore.S and x86/xen/pv.c to the list of files.
Notes
Notes:
svn path=/head/; revision=263002
Diffstat (limited to 'sys')
-rw-r--r-- | sys/amd64/amd64/genassym.c | 2 | ||||
-rw-r--r-- | sys/amd64/amd64/locore.S | 1 | ||||
-rw-r--r-- | sys/amd64/amd64/xen-locore.S | 83 | ||||
-rw-r--r-- | sys/amd64/include/asmacros.h | 26 | ||||
-rw-r--r-- | sys/conf/files.amd64 | 2 | ||||
-rw-r--r-- | sys/i386/xen/xen_machdep.c | 2 | ||||
-rw-r--r-- | sys/x86/xen/hvm.c | 1 | ||||
-rw-r--r-- | sys/x86/xen/pv.c | 119 | ||||
-rw-r--r-- | sys/xen/xen-os.h | 4 |
9 files changed, 240 insertions, 0 deletions
diff --git a/sys/amd64/amd64/genassym.c b/sys/amd64/amd64/genassym.c index 028a2cd84863..ff1f28287b88 100644 --- a/sys/amd64/amd64/genassym.c +++ b/sys/amd64/amd64/genassym.c @@ -248,6 +248,8 @@ ASSYM(TSSSEL, GSEL(GPROC0_SEL, SEL_KPL)); ASSYM(LDTSEL, GSEL(GUSERLDT_SEL, SEL_KPL)); ASSYM(SEL_RPL_MASK, SEL_RPL_MASK); +ASSYM(__FreeBSD_version, __FreeBSD_version); + #ifdef HWPMC_HOOKS ASSYM(PMC_FN_USER_CALLCHAIN, PMC_FN_USER_CALLCHAIN); #endif diff --git a/sys/amd64/amd64/locore.S b/sys/amd64/amd64/locore.S index 55cda3ab1863..4acef978cba9 100644 --- a/sys/amd64/amd64/locore.S +++ b/sys/amd64/amd64/locore.S @@ -84,5 +84,6 @@ NON_GPROF_ENTRY(btext) .bss ALIGN_DATA /* just to be sure */ + .globl bootstack .space 0x1000 /* space for bootstack - temporary stack */ bootstack: diff --git a/sys/amd64/amd64/xen-locore.S b/sys/amd64/amd64/xen-locore.S new file mode 100644 index 000000000000..0142e6b134f6 --- /dev/null +++ b/sys/amd64/amd64/xen-locore.S @@ -0,0 +1,83 @@ +/*- + * Copyright (c) 2003 Peter Wemm <peter@FreeBSD.org> + * Copyright (c) 2013 Roger Pau Monne <royger@FreeBSD.org> + * 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 THE AUTHOR AND CONTRIBUTORS ``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 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. + * + * $FreeBSD$ + */ + +#include <machine/asmacros.h> +#include <machine/psl.h> +#include <machine/pmap.h> +#include <machine/specialreg.h> + +#include <xen/xen-os.h> +#define __ASSEMBLY__ +#include <xen/interface/elfnote.h> + +#include "assym.s" + +.section __xen_guest + ELFNOTE(Xen, XEN_ELFNOTE_GUEST_OS, .asciz, "FreeBSD") + ELFNOTE(Xen, XEN_ELFNOTE_GUEST_VERSION, .asciz, __XSTRING(__FreeBSD_version)) + ELFNOTE(Xen, XEN_ELFNOTE_XEN_VERSION, .asciz, "xen-3.0") + ELFNOTE(Xen, XEN_ELFNOTE_VIRT_BASE, .quad, KERNBASE) + ELFNOTE(Xen, XEN_ELFNOTE_PADDR_OFFSET, .quad, KERNBASE) /* Xen honours elf->p_paddr; compensate for this */ + ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, .quad, xen_start) + ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, .quad, hypercall_page) + ELFNOTE(Xen, XEN_ELFNOTE_HV_START_LOW, .quad, HYPERVISOR_VIRT_START) + ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .asciz, "writable_descriptor_tables|auto_translated_physmap|supervisor_mode_kernel|hvm_callback_vector") + ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz, "yes") + ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID, .long, PG_V, PG_V) + ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz, "generic") + ELFNOTE(Xen, XEN_ELFNOTE_SUSPEND_CANCEL, .long, 0) + ELFNOTE(Xen, XEN_ELFNOTE_BSD_SYMTAB, .asciz, "yes") + + .text +.p2align PAGE_SHIFT, 0x90 /* Hypercall_page needs to be PAGE aligned */ + +NON_GPROF_ENTRY(hypercall_page) + .skip 0x1000, 0x90 /* Fill with "nop"s */ + +NON_GPROF_ENTRY(xen_start) + /* Don't trust what the loader gives for rflags. */ + pushq $PSL_KERNEL + popfq + + /* Parameters for the xen init function */ + movq %rsi, %rdi /* shared_info (arg 1) */ + movq %rsp, %rsi /* xenstack (arg 2) */ + + /* Use our own stack */ + movq $bootstack,%rsp + xorl %ebp, %ebp + + /* u_int64_t hammer_time_xen(start_info_t *si, u_int64_t xenstack); */ + call hammer_time_xen + movq %rax, %rsp /* set up kstack for mi_startup() */ + call mi_startup /* autoconfiguration, mountroot etc */ + + /* NOTREACHED */ +0: hlt + jmp 0b diff --git a/sys/amd64/include/asmacros.h b/sys/amd64/include/asmacros.h index 1fb592aef40e..ce8dce4d622a 100644 --- a/sys/amd64/include/asmacros.h +++ b/sys/amd64/include/asmacros.h @@ -201,4 +201,30 @@ #endif /* LOCORE */ +#ifdef __STDC__ +#define ELFNOTE(name, type, desctype, descdata...) \ +.pushsection .note.name ; \ + .align 4 ; \ + .long 2f - 1f /* namesz */ ; \ + .long 4f - 3f /* descsz */ ; \ + .long type ; \ +1:.asciz #name ; \ +2:.align 4 ; \ +3:desctype descdata ; \ +4:.align 4 ; \ +.popsection +#else /* !__STDC__, i.e. -traditional */ +#define ELFNOTE(name, type, desctype, descdata) \ +.pushsection .note.name ; \ + .align 4 ; \ + .long 2f - 1f /* namesz */ ; \ + .long 4f - 3f /* descsz */ ; \ + .long type ; \ +1:.asciz "name" ; \ +2:.align 4 ; \ +3:desctype descdata ; \ +4:.align 4 ; \ +.popsection +#endif /* __STDC__ */ + #endif /* !_MACHINE_ASMACROS_H_ */ diff --git a/sys/conf/files.amd64 b/sys/conf/files.amd64 index f4b3c4c478fd..a6eb12acad6f 100644 --- a/sys/conf/files.amd64 +++ b/sys/conf/files.amd64 @@ -108,6 +108,7 @@ amd64/amd64/in_cksum.c optional inet | inet6 amd64/amd64/initcpu.c standard amd64/amd64/io.c optional io amd64/amd64/locore.S standard no-obj +amd64/amd64/xen-locore.S optional xenhvm amd64/amd64/machdep.c standard amd64/amd64/mem.c optional mem amd64/amd64/minidump_machdep.c standard @@ -555,3 +556,4 @@ x86/x86/nexus.c standard x86/x86/tsc.c standard x86/xen/hvm.c optional xenhvm x86/xen/xen_intr.c optional xen | xenhvm +x86/xen/pv.c optional xenhvm diff --git a/sys/i386/xen/xen_machdep.c b/sys/i386/xen/xen_machdep.c index 7049be6d561a..fd575ee35053 100644 --- a/sys/i386/xen/xen_machdep.c +++ b/sys/i386/xen/xen_machdep.c @@ -89,6 +89,7 @@ IDTVEC(div), IDTVEC(dbg), IDTVEC(nmi), IDTVEC(bpt), IDTVEC(ofl), int xendebug_flags; start_info_t *xen_start_info; +start_info_t *HYPERVISOR_start_info; shared_info_t *HYPERVISOR_shared_info; xen_pfn_t *xen_machine_phys = machine_to_phys_mapping; xen_pfn_t *xen_phys_machine; @@ -927,6 +928,7 @@ initvalues(start_info_t *startinfo) HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments_notify); #endif xen_start_info = startinfo; + HYPERVISOR_start_info = startinfo; xen_phys_machine = (xen_pfn_t *)startinfo->mfn_list; IdlePTD = (pd_entry_t *)((uint8_t *)startinfo->pt_base + PAGE_SIZE); diff --git a/sys/x86/xen/hvm.c b/sys/x86/xen/hvm.c index 9f4c6bef98b0..6977d561088c 100644 --- a/sys/x86/xen/hvm.c +++ b/sys/x86/xen/hvm.c @@ -149,6 +149,7 @@ DPCPU_DEFINE(xen_intr_handle_t, ipi_handle[nitems(xen_ipis)]); /** Hypercall table accessed via HYPERVISOR_*_op() methods. */ char *hypercall_stubs; shared_info_t *HYPERVISOR_shared_info; +start_info_t *HYPERVISOR_start_info; #ifdef SMP /*---------------------------- XEN PV IPI Handlers ---------------------------*/ diff --git a/sys/x86/xen/pv.c b/sys/x86/xen/pv.c new file mode 100644 index 000000000000..6805baa2565f --- /dev/null +++ b/sys/x86/xen/pv.c @@ -0,0 +1,119 @@ +/* + * Copyright (c) 2004 Christian Limpach. + * Copyright (c) 2004-2006,2008 Kip Macy + * Copyright (c) 2013 Roger Pau Monné <roger.pau@citrix.com> + * 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 THE AUTHOR AND CONTRIBUTORS 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 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. + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/param.h> +#include <sys/bus.h> +#include <sys/kernel.h> +#include <sys/reboot.h> +#include <sys/systm.h> +#include <sys/lock.h> +#include <sys/rwlock.h> + +#include <vm/vm.h> +#include <vm/vm_extern.h> +#include <vm/vm_kern.h> +#include <vm/vm_page.h> +#include <vm/vm_map.h> +#include <vm/vm_object.h> +#include <vm/vm_pager.h> +#include <vm/vm_param.h> + +#include <xen/xen-os.h> +#include <xen/hypervisor.h> + +/* Native initial function */ +extern u_int64_t hammer_time(u_int64_t, u_int64_t); +/* Xen initial function */ +uint64_t hammer_time_xen(start_info_t *, uint64_t); + +/* + * First function called by the Xen PVH boot sequence. + * + * Set some Xen global variables and prepare the environment so it is + * as similar as possible to what native FreeBSD init function expects. + */ +uint64_t +hammer_time_xen(start_info_t *si, uint64_t xenstack) +{ + uint64_t physfree; + uint64_t *PT4 = (u_int64_t *)xenstack; + uint64_t *PT3 = (u_int64_t *)(xenstack + PAGE_SIZE); + uint64_t *PT2 = (u_int64_t *)(xenstack + 2 * PAGE_SIZE); + int i; + + xen_domain_type = XEN_PV_DOMAIN; + vm_guest = VM_GUEST_XEN; + + if ((si == NULL) || (xenstack == 0)) { + HYPERVISOR_shutdown(SHUTDOWN_crash); + } + + /* We use 3 pages of xen stack for the boot pagetables */ + physfree = xenstack + 3 * PAGE_SIZE - KERNBASE; + + /* Setup Xen global variables */ + HYPERVISOR_start_info = si; + HYPERVISOR_shared_info = + (shared_info_t *)(si->shared_info + KERNBASE); + + /* + * Setup some misc global variables for Xen devices + * + * XXX: Devices that need these specific variables should + * be rewritten to fetch this info by themselves from the + * start_info page. + */ + xen_store = (struct xenstore_domain_interface *) + (ptoa(si->store_mfn) + KERNBASE); + + /* + * Use the stack Xen gives us to build the page tables + * as native FreeBSD expects to find them (created + * by the boot trampoline). + */ + for (i = 0; i < (PAGE_SIZE / sizeof(uint64_t)); i++) { + /* Each slot of the level 4 pages points to the same level 3 page */ + PT4[i] = ((uint64_t)&PT3[0]) - KERNBASE; + PT4[i] |= PG_V | PG_RW | PG_U; + + /* Each slot of the level 3 pages points to the same level 2 page */ + PT3[i] = ((uint64_t)&PT2[0]) - KERNBASE; + PT3[i] |= PG_V | PG_RW | PG_U; + + /* The level 2 page slots are mapped with 2MB pages for 1GB. */ + PT2[i] = i * (2 * 1024 * 1024); + PT2[i] |= PG_V | PG_RW | PG_PS | PG_U; + } + load_cr3(((uint64_t)&PT4[0]) - KERNBASE); + + /* Now we can jump into the native init function */ + return (hammer_time(0, physfree)); +} diff --git a/sys/xen/xen-os.h b/sys/xen/xen-os.h index 87644e978e10..c7474d80da74 100644 --- a/sys/xen/xen-os.h +++ b/sys/xen/xen-os.h @@ -51,6 +51,10 @@ void force_evtchn_callback(void); extern shared_info_t *HYPERVISOR_shared_info; +extern start_info_t *HYPERVISOR_start_info; + +/* XXX: we need to get rid of this and use HYPERVISOR_start_info directly */ +extern struct xenstore_domain_interface *xen_store; enum xen_domain_type { XEN_NATIVE, /* running on bare hardware */ |