--- sys/amd64/amd64/machdep.c | 41 ++++++++++++++++------ sys/amd64/include/sysarch.h | 12 ++++++ sys/x86/xen/pv.c | 82 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 124 insertions(+), 11 deletions(-) diff --git a/sys/amd64/amd64/machdep.c b/sys/amd64/amd64/machdep.c index eae657b..e073eea 100644 --- a/sys/amd64/amd64/machdep.c +++ b/sys/amd64/amd64/machdep.c _at__at_ -126,6 +126,7 _at__at_ __FBSDID("$FreeBSD$"); #include <machine/reg.h> #include <machine/sigframe.h> #include <machine/specialreg.h> +#include <machine/sysarch.h> #ifdef PERFMON #include <machine/perfmon.h> #endif _at__at_ -165,6 +166,14 _at__at_ static int set_fpcontext(struct thread *td, const mcontext_t *mcp, char *xfpustate, size_t xfpustate_len); SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL); +/* Preload data parse function */ +static caddr_t native_parse_preload_data(u_int64_t); + +/* Default init_ops implementation. */ +struct init_ops init_ops = { + .parse_preload_data = native_parse_preload_data, +}; + /* * The file "conf/ldscript.amd64" defines the symbol "kernphys". Its value is * the physical address at which the kernel is loaded. _at__at_ -1683,6 +1692,26 _at__at_ do_next: msgbufp = (struct msgbuf *)PHYS_TO_DMAP(phys_avail[pa_indx]); } +static caddr_t +native_parse_preload_data(u_int64_t modulep) +{ + caddr_t kmdp; + + preload_metadata = (caddr_t)(uintptr_t)(modulep + KERNBASE); + preload_bootstrap_relocate(KERNBASE); + kmdp = preload_search_by_type("elf kernel"); + if (kmdp == NULL) + kmdp = preload_search_by_type("elf64 kernel"); + boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); + kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE; +#ifdef DDB + ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); + ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); +#endif + + return (kmdp); +} + u_int64_t hammer_time(u_int64_t modulep, u_int64_t physfree) { _at__at_ -1707,17 +1736,7 _at__at_ hammer_time(u_int64_t modulep, u_int64_t physfree) */ proc_linkup0(&proc0, &thread0); - preload_metadata = (caddr_t)(uintptr_t)(modulep + KERNBASE); - preload_bootstrap_relocate(KERNBASE); - kmdp = preload_search_by_type("elf kernel"); - if (kmdp == NULL) - kmdp = preload_search_by_type("elf64 kernel"); - boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int); - kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *) + KERNBASE; -#ifdef DDB - ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t); - ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t); -#endif + kmdp = init_ops.parse_preload_data(modulep); /* Init basic tunables, hz etc */ init_param1(); diff --git a/sys/amd64/include/sysarch.h b/sys/amd64/include/sysarch.h index cd380d4..58ac8cd 100644 --- a/sys/amd64/include/sysarch.h +++ b/sys/amd64/include/sysarch.h _at__at_ -4,3 +4,15 _at__at_ /* $FreeBSD$ */ #include <x86/sysarch.h> + +/* + * Struct containing pointers to init functions whose + * implementation is run time selectable. Selection can be made, + * for example, based on detection of a BIOS variant or + * hypervisor environment. + */ +struct init_ops { + caddr_t (*parse_preload_data)(u_int64_t); +}; + +extern struct init_ops init_ops; diff --git a/sys/x86/xen/pv.c b/sys/x86/xen/pv.c index db3b7a3..908b50b 100644 --- a/sys/x86/xen/pv.c +++ b/sys/x86/xen/pv.c _at__at_ -46,6 +46,8 _at__at_ __FBSDID("$FreeBSD$"); #include <vm/vm_pager.h> #include <vm/vm_param.h> +#include <machine/sysarch.h> + #include <xen/xen-os.h> #include <xen/hypervisor.h> _at__at_ -54,6 +56,36 _at__at_ extern u_int64_t hammer_time(u_int64_t, u_int64_t); /* Xen initial function */ extern u_int64_t hammer_time_xen(start_info_t *, u_int64_t); +/*--------------------------- Forward Declarations ---------------------------*/ +static caddr_t xen_pv_parse_preload_data(u_int64_t); + +static void xen_pv_set_init_ops(void); + +/*-------------------------------- Global Data -------------------------------*/ +/* Xen init_ops implementation. */ +struct init_ops xen_init_ops = { + .parse_preload_data = xen_pv_parse_preload_data, +}; + +static struct +{ + const char *ev; + int mask; +} howto_names[] = { + {"boot_askname", RB_ASKNAME}, + {"boot_single", RB_SINGLE}, + {"boot_nosync", RB_NOSYNC}, + {"boot_halt", RB_ASKNAME}, + {"boot_serial", RB_SERIAL}, + {"boot_cdrom", RB_CDROM}, + {"boot_gdb", RB_GDB}, + {"boot_gdb_pause", RB_RESERVED1}, + {"boot_verbose", RB_VERBOSE}, + {"boot_multicons", RB_MULTIPLE}, + {NULL, 0} +}; + +/*-------------------------------- Xen PV init -------------------------------*/ /* * First function called by the Xen PVH boot sequence. * _at__at_ -118,6 +150,56 _at__at_ hammer_time_xen(start_info_t *si, u_int64_t xenstack) } load_cr3(((u_int64_t)&PT4[0]) - KERNBASE); + /* Set the hooks for early functions that diverge from bare metal */ + xen_pv_set_init_ops(); + /* Now we can jump into the native init function */ return (hammer_time(0, physfree)); } + +/*-------------------------------- PV specific -------------------------------*/ +/* + * Functions to convert the "extra" parameters passed by Xen + * into FreeBSD boot options (from the i386 Xen port). + */ +static char * +xen_setbootenv(char *cmd_line) +{ + char *cmd_line_next; + + /* Skip leading spaces */ + for (; *cmd_line == ' '; cmd_line++); + + for (cmd_line_next = cmd_line; strsep(&cmd_line_next, ",") != NULL;); + return (cmd_line); +} + +static int +xen_boothowto(char *envp) +{ + int i, howto = 0; + + /* get equivalents from the environment */ + for (i = 0; howto_names[i].ev != NULL; i++) + if (getenv(howto_names[i].ev) != NULL) + howto |= howto_names[i].mask; + return (howto); +} + +static caddr_t +xen_pv_parse_preload_data(u_int64_t modulep) +{ + /* Parse the extra boot information given by Xen */ + if (HYPERVISOR_start_info->cmd_line) + kern_envp = xen_setbootenv(HYPERVISOR_start_info->cmd_line); + boothowto |= xen_boothowto(kern_envp); + + return (NULL); +} + +static void +xen_pv_set_init_ops(void) +{ + /* Init ops for Xen PV */ + init_ops = xen_init_ops; +} -- 1.7.7.5 (Apple Git-26)Received on Thu Jan 02 2014 - 14:44:08 UTC
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