import ia64 specific part of xencomm which converts hypercall argument in virtual address into pseudo physical address (guest physical address). Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx> --- arch/ia64/xen/xcom_asm.S | 27 +++ arch/ia64/xen/xcom_hcall.c | 458 +++++++++++++++++++++++++++++++++++++ arch/ia64/xen/xencomm.c | 108 +++++++++ include/asm-ia64/xen/xcom_hcall.h | 55 +++++ include/asm-ia64/xen/xencomm.h | 33 +++ 5 files changed, 681 insertions(+), 0 deletions(-) create mode 100644 arch/ia64/xen/xcom_asm.S create mode 100644 arch/ia64/xen/xcom_hcall.c create mode 100644 arch/ia64/xen/xencomm.c create mode 100644 include/asm-ia64/xen/xcom_hcall.h create mode 100644 include/asm-ia64/xen/xencomm.h diff --git a/arch/ia64/xen/xcom_asm.S b/arch/ia64/xen/xcom_asm.S new file mode 100644 index 0000000..8747908 --- /dev/null +++ b/arch/ia64/xen/xcom_asm.S @@ -0,0 +1,27 @@ +/* + * xencomm suspend support + * Support routines for Xen + * + * Copyright (C) 2005 Dan Magenheimer <dan.magenheimer@xxxxxx> + */ +#include <asm/asmmacro.h> +#include <xen/interface/xen.h> + +/* + * Stub for suspend. + * Just force the stacked registers to be written in memory. + */ +GLOBAL_ENTRY(xencomm_arch_hypercall_suspend) + ;; + alloc r20=ar.pfs,0,0,6,0 + mov r2=__HYPERVISOR_sched_op + ;; + /* We don't want to deal with RSE. */ + flushrs + mov r33=r32 + mov r32=2 // SCHEDOP_shutdown + ;; + break 0x1000 + ;; + br.ret.sptk.many b0 +END(xencomm_arch_hypercall_suspend) diff --git a/arch/ia64/xen/xcom_hcall.c b/arch/ia64/xen/xcom_hcall.c new file mode 100644 index 0000000..8cd9cdc --- /dev/null +++ b/arch/ia64/xen/xcom_hcall.c @@ -0,0 +1,458 @@ +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + * + * Tristan Gingold <tristan.gingold@xxxxxxxx> + * + * Copyright (c) 2007 + * Isaku Yamahata <yamahata at valinux co jp> + * VA Linux Systems Japan K.K. + * consolidate mini and inline version. + */ +#include <linux/types.h> +#include <linux/errno.h> +#include <linux/kernel.h> +#include <linux/gfp.h> +#include <linux/module.h> +#include <xen/interface/xen.h> +#include <xen/interface/memory.h> +#include <xen/interface/xencomm.h> +#include <xen/interface/version.h> +#include <xen/interface/sched.h> +#include <xen/interface/event_channel.h> +#include <xen/interface/physdev.h> +#include <xen/interface/grant_table.h> +#include <xen/interface/callback.h> +#include <xen/interface/vcpu.h> +#include <asm/xen/hypervisor.h> +#include <asm/page.h> +#include <asm/uaccess.h> +#include <asm/xen/xencomm.h> + +/* Xencomm notes: + * This file defines hypercalls to be used by xencomm. The hypercalls simply + * create inlines or mini descriptors for pointers and then call the raw arch + * hypercall xencomm_arch_hypercall_XXX + * + * If the arch wants to directly use these hypercalls, simply define macros + * in asm/xen/hypercall.h, eg: + * #define HYPERVISOR_sched_op xencomm_hypercall_sched_op + * + * The arch may also define HYPERVISOR_xxx as a function and do more operations + * before/after doing the hypercall. + * + * Note: because only inline or mini descriptors are created these functions + * must only be called with in kernel memory parameters. + */ + +int +xencomm_hypercall_console_io(int cmd, int count, char *str) +{ + return xencomm_arch_hypercall_console_io + (cmd, count, xencomm_map_no_alloc(str, count)); +} +EXPORT_SYMBOL_GPL(xencomm_hypercall_console_io); + +int +xencomm_hypercall_event_channel_op(int cmd, void *op) +{ + struct xencomm_handle *desc; + desc = xencomm_map_no_alloc(op, sizeof(struct evtchn_op)); + if (desc == NULL) + return -EINVAL; + + return xencomm_arch_hypercall_event_channel_op(cmd, desc); +} +EXPORT_SYMBOL_GPL(xencomm_hypercall_event_channel_op); + +int +xencomm_hypercall_xen_version(int cmd, void *arg) +{ + struct xencomm_handle *desc; + unsigned int argsize; + + switch (cmd) { + case XENVER_version: + /* do not actually pass an argument */ + return xencomm_arch_hypercall_xen_version(cmd, 0); + case XENVER_extraversion: + argsize = sizeof(struct xen_extraversion); + break; + case XENVER_compile_info: + argsize = sizeof(struct xen_compile_info); + break; + case XENVER_capabilities: + argsize = sizeof(struct xen_capabilities_info); + break; + case XENVER_changeset: + argsize = sizeof(struct xen_changeset_info); + break; + case XENVER_platform_parameters: + argsize = sizeof(struct xen_platform_parameters); + break; + case XENVER_get_features: + argsize = (arg == NULL) ? 0 : sizeof(struct xen_feature_info); + break; + + default: + printk(KERN_DEBUG + "%s: unknown version op %d\n", __func__, cmd); + return -ENOSYS; + } + + desc = xencomm_map_no_alloc(arg, argsize); + if (desc == NULL) + return -EINVAL; + + return xencomm_arch_hypercall_xen_version(cmd, desc); +} +EXPORT_SYMBOL_GPL(xencomm_hypercall_xen_version); + +int +xencomm_hypercall_physdev_op(int cmd, void *op) +{ + unsigned int argsize; + + switch (cmd) { + case PHYSDEVOP_apic_read: + case PHYSDEVOP_apic_write: + argsize = sizeof(struct physdev_apic); + break; + case PHYSDEVOP_alloc_irq_vector: + case PHYSDEVOP_free_irq_vector: + argsize = sizeof(struct physdev_irq); + break; + case PHYSDEVOP_irq_status_query: + argsize = sizeof(struct physdev_irq_status_query); + break; + + default: + printk(KERN_DEBUG + "%s: unknown physdev op %d\n", __func__, cmd); + return -ENOSYS; + } + + return xencomm_arch_hypercall_physdev_op + (cmd, xencomm_map_no_alloc(op, argsize)); +} + +static int +xencommize_grant_table_op(struct xencomm_mini **xc_area, + unsigned int cmd, void *op, unsigned int count, + struct xencomm_handle **desc) +{ + struct xencomm_handle *desc1; + unsigned int argsize; + + switch (cmd) { + case GNTTABOP_map_grant_ref: + argsize = sizeof(struct gnttab_map_grant_ref); + break; + case GNTTABOP_unmap_grant_ref: + argsize = sizeof(struct gnttab_unmap_grant_ref); + break; + case GNTTABOP_setup_table: + { + struct gnttab_setup_table *setup = op; + + argsize = sizeof(*setup); + + if (count != 1) + return -EINVAL; + desc1 = __xencomm_map_no_alloc + (xen_guest_handle(setup->frame_list), + setup->nr_frames * + sizeof(*xen_guest_handle(setup->frame_list)), + *xc_area); + if (desc1 == NULL) + return -EINVAL; + (*xc_area)++; + set_xen_guest_handle(setup->frame_list, (void *)desc1); + break; + } + case GNTTABOP_dump_table: + argsize = sizeof(struct gnttab_dump_table); + break; + case GNTTABOP_transfer: + argsize = sizeof(struct gnttab_transfer); + break; + case GNTTABOP_copy: + argsize = sizeof(struct gnttab_copy); + break; + case GNTTABOP_query_size: + argsize = sizeof(struct gnttab_query_size); + break; + default: + printk(KERN_DEBUG "%s: unknown hypercall grant table op %d\n", + __func__, cmd); + BUG(); + } + + *desc = __xencomm_map_no_alloc(op, count * argsize, *xc_area); + if (*desc == NULL) + return -EINVAL; + (*xc_area)++; + + return 0; +} + +int +xencomm_hypercall_grant_table_op(unsigned int cmd, void *op, + unsigned int count) +{ + int rc; + struct xencomm_handle *desc; + XENCOMM_MINI_ALIGNED(xc_area, 2); + + rc = xencommize_grant_table_op(&xc_area, cmd, op, count, &desc); + if (rc) + return rc; + + return xencomm_arch_hypercall_grant_table_op(cmd, desc, count); +} +EXPORT_SYMBOL_GPL(xencomm_hypercall_grant_table_op); + +int +xencomm_hypercall_sched_op(int cmd, void *arg) +{ + struct xencomm_handle *desc; + unsigned int argsize; + + switch (cmd) { + case SCHEDOP_yield: + case SCHEDOP_block: + argsize = 0; + break; + case SCHEDOP_shutdown: + argsize = sizeof(struct sched_shutdown); + break; + case SCHEDOP_poll: + { + struct sched_poll *poll = arg; + struct xencomm_handle *ports; + + argsize = sizeof(struct sched_poll); + ports = xencomm_map_no_alloc(xen_guest_handle(poll->ports), + sizeof(*xen_guest_handle(poll->ports))); + + set_xen_guest_handle(poll->ports, (void *)ports); + break; + } + default: + printk(KERN_DEBUG "%s: unknown sched op %d\n", __func__, cmd); + return -ENOSYS; + } + + desc = xencomm_map_no_alloc(arg, argsize); + if (desc == NULL) + return -EINVAL; + + return xencomm_arch_hypercall_sched_op(cmd, desc); +} +EXPORT_SYMBOL_GPL(xencomm_hypercall_sched_op); + +int +xencomm_hypercall_multicall(void *call_list, int nr_calls) +{ + int rc; + int i; + struct multicall_entry *mce; + struct xencomm_handle *desc; + XENCOMM_MINI_ALIGNED(xc_area, nr_calls * 2); + + for (i = 0; i < nr_calls; i++) { + mce = (struct multicall_entry *)call_list + i; + + switch (mce->op) { + case __HYPERVISOR_update_va_mapping: + case __HYPERVISOR_mmu_update: + /* No-op on ia64. */ + break; + case __HYPERVISOR_grant_table_op: + rc = xencommize_grant_table_op + (&xc_area, + mce->args[0], (void *)mce->args[1], + mce->args[2], &desc); + if (rc) + return rc; + mce->args[1] = (unsigned long)desc; + break; + case __HYPERVISOR_memory_op: + default: + printk(KERN_DEBUG + "%s: unhandled multicall op entry op %lu\n", + __func__, mce->op); + return -ENOSYS; + } + } + + desc = xencomm_map_no_alloc(call_list, + nr_calls * sizeof(struct multicall_entry)); + if (desc == NULL) + return -EINVAL; + + return xencomm_arch_hypercall_multicall(desc, nr_calls); +} +EXPORT_SYMBOL_GPL(xencomm_hypercall_multicall); + +int +xencomm_hypercall_callback_op(int cmd, void *arg) +{ + unsigned int argsize; + switch (cmd) { + case CALLBACKOP_register: + argsize = sizeof(struct callback_register); + break; + case CALLBACKOP_unregister: + argsize = sizeof(struct callback_unregister); + break; + default: + printk(KERN_DEBUG + "%s: unknown callback op %d\n", __func__, cmd); + return -ENOSYS; + } + + return xencomm_arch_hypercall_callback_op + (cmd, xencomm_map_no_alloc(arg, argsize)); +} + +static int +xencommize_memory_reservation(struct xencomm_mini *xc_area, + struct xen_memory_reservation *mop) +{ + struct xencomm_handle *desc; + + desc = __xencomm_map_no_alloc(xen_guest_handle(mop->extent_start), + mop->nr_extents * + sizeof(*xen_guest_handle(mop->extent_start)), + xc_area); + if (desc == NULL) + return -EINVAL; + + set_xen_guest_handle(mop->extent_start, (void *)desc); + return 0; +} + +int +xencomm_hypercall_memory_op(unsigned int cmd, void *arg) +{ + XEN_GUEST_HANDLE(xen_pfn_t) extent_start_va[2] = {{NULL}, {NULL}}; + struct xen_memory_reservation *xmr = NULL; + int rc; + struct xencomm_handle *desc; + unsigned int argsize; + XENCOMM_MINI_ALIGNED(xc_area, 2); + + switch (cmd) { + case XENMEM_increase_reservation: + case XENMEM_decrease_reservation: + case XENMEM_populate_physmap: + xmr = (struct xen_memory_reservation *)arg; + set_xen_guest_handle(extent_start_va[0], + xen_guest_handle(xmr->extent_start)); + + argsize = sizeof(*xmr); + rc = xencommize_memory_reservation(xc_area, xmr); + if (rc) + return rc; + xc_area++; + break; + + case XENMEM_maximum_ram_page: + argsize = 0; + break; + + case XENMEM_add_to_physmap: + argsize = sizeof(struct xen_add_to_physmap); + break; + + default: + printk(KERN_DEBUG "%s: unknown memory op %d\n", __func__, cmd); + return -ENOSYS; + } + + desc = xencomm_map_no_alloc(arg, argsize); + if (desc == NULL) + return -EINVAL; + + rc = xencomm_arch_hypercall_memory_op(cmd, desc); + + switch (cmd) { + case XENMEM_increase_reservation: + case XENMEM_decrease_reservation: + case XENMEM_populate_physmap: + set_xen_guest_handle(xmr->extent_start, + xen_guest_handle(extent_start_va[0])); + break; + } + + return rc; +} +EXPORT_SYMBOL_GPL(xencomm_hypercall_memory_op); + +int +xencomm_hypercall_suspend(unsigned long srec) +{ + struct sched_shutdown arg; + + arg.reason = SHUTDOWN_suspend; + + return xencomm_arch_hypercall_suspend( + xencomm_map_no_alloc(&arg, sizeof(arg))); +} + +long +xencomm_hypercall_vcpu_op(int cmd, int cpu, void *arg) +{ + unsigned int argsize; + switch (cmd) { + case VCPUOP_register_runstate_memory_area: { + struct vcpu_register_runstate_memory_area *area = + (struct vcpu_register_runstate_memory_area *)arg; + argsize = sizeof(*arg); + set_xen_guest_handle(area->addr.h, + (void *)xencomm_map_no_alloc(area->addr.v, + sizeof(area->addr.v))); + break; + } + + default: + printk(KERN_DEBUG "%s: unknown vcpu op %d\n", __func__, cmd); + return -ENOSYS; + } + + return xencomm_arch_hypercall_vcpu_op(cmd, cpu, + xencomm_map_no_alloc(arg, argsize)); +} + +long +xencomm_hypercall_opt_feature(void *arg) +{ + return xencomm_arch_hypercall_opt_feature( + xencomm_map_no_alloc(arg, + sizeof(struct xen_ia64_opt_feature))); +} + +int +xencomm_hypercall_fpswa_revision(unsigned int *revision) +{ + struct xencomm_handle *desc; + + desc = xencomm_map_no_alloc(revision, sizeof(*revision)); + if (desc == NULL) + return -EINVAL; + + return xencomm_arch_hypercall_fpswa_revision(desc); +} +EXPORT_SYMBOL_GPL(xencomm_hypercall_fpswa_revision); diff --git a/arch/ia64/xen/xencomm.c b/arch/ia64/xen/xencomm.c new file mode 100644 index 0000000..6e9da66 --- /dev/null +++ b/arch/ia64/xen/xencomm.c @@ -0,0 +1,108 @@ +/* + * Copyright (C) 2006 Hollis Blanchard <hollisb@xxxxxxxxxx>, IBM Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include <linux/gfp.h> +#include <linux/mm.h> +#include <xen/interface/xen.h> +#include <asm/page.h> + +#ifdef HAVE_XEN_PLATFORM_COMPAT_H +#include <xen/platform-compat.h> +#endif + +#include <asm/xen/xencomm.h> + +static unsigned long kernel_start_pa; + +void +xencomm_initialize(void) +{ + kernel_start_pa = KERNEL_START - ia64_tpa(KERNEL_START); +} + +/* Translate virtual address to physical address. */ +unsigned long +xencomm_vtop(unsigned long vaddr) +{ +#ifndef CONFIG_VMX_GUEST + struct page *page; + struct vm_area_struct *vma; +#endif + + if (vaddr == 0) + return 0; + +#ifdef __ia64__ + if (REGION_NUMBER(vaddr) == 5) { + pgd_t *pgd; + pud_t *pud; + pmd_t *pmd; + pte_t *ptep; + + /* On ia64, TASK_SIZE refers to current. It is not initialized + during boot. + Furthermore the kernel is relocatable and __pa() doesn't + work on addresses. */ + if (vaddr >= KERNEL_START + && vaddr < (KERNEL_START + KERNEL_TR_PAGE_SIZE)) + return vaddr - kernel_start_pa; + + /* In kernel area -- virtually mapped. */ + pgd = pgd_offset_k(vaddr); + if (pgd_none(*pgd) || pgd_bad(*pgd)) + return ~0UL; + + pud = pud_offset(pgd, vaddr); + if (pud_none(*pud) || pud_bad(*pud)) + return ~0UL; + + pmd = pmd_offset(pud, vaddr); + if (pmd_none(*pmd) || pmd_bad(*pmd)) + return ~0UL; + + ptep = pte_offset_kernel(pmd, vaddr); + if (!ptep) + return ~0UL; + + return (pte_val(*ptep) & _PFN_MASK) | (vaddr & ~PAGE_MASK); + } +#endif + + if (vaddr > TASK_SIZE) { + /* kernel address */ + return __pa(vaddr); + } + + +#ifdef CONFIG_VMX_GUEST + /* No privcmd within vmx guest. */ + return ~0UL; +#else + /* XXX double-check (lack of) locking */ + vma = find_extend_vma(current->mm, vaddr); + if (!vma) + return ~0UL; + + /* We assume the page is modified. */ + page = follow_page(vma, vaddr, FOLL_WRITE | FOLL_TOUCH); + if (!page) + return ~0UL; + + return (page_to_pfn(page) << PAGE_SHIFT) | (vaddr & ~PAGE_MASK); +#endif +} diff --git a/include/asm-ia64/xen/xcom_hcall.h b/include/asm-ia64/xen/xcom_hcall.h new file mode 100644 index 0000000..adf4ba2 --- /dev/null +++ b/include/asm-ia64/xen/xcom_hcall.h @@ -0,0 +1,55 @@ +/* + * Copyright (C) 2006 Tristan Gingold <tristan.gingold@xxxxxxxx>, Bull SAS + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef _LINUX_XENCOMM_HCALL_H_ +#define _LINUX_XENCOMM_HCALL_H_ + +/* These function creates inline or mini descriptor for the parameters and + calls the corresponding xencomm_arch_hypercall_X. + Architectures should defines HYPERVISOR_xxx as xencomm_hypercall_xxx unless + they want to use their own wrapper. */ +extern int xencomm_hypercall_console_io(int cmd, int count, char *str); + +extern int xencomm_hypercall_event_channel_op(int cmd, void *op); + +extern int xencomm_hypercall_xen_version(int cmd, void *arg); + +extern int xencomm_hypercall_physdev_op(int cmd, void *op); + +extern int xencomm_hypercall_grant_table_op(unsigned int cmd, void *op, + unsigned int count); + +extern int xencomm_hypercall_sched_op(int cmd, void *arg); + +extern int xencomm_hypercall_multicall(void *call_list, int nr_calls); + +extern int xencomm_hypercall_callback_op(int cmd, void *arg); + +extern int xencomm_hypercall_memory_op(unsigned int cmd, void *arg); + +extern unsigned long xencomm_hypercall_hvm_op(int cmd, void *arg); + +extern int xencomm_hypercall_suspend(unsigned long srec); + +extern long xencomm_hypercall_vcpu_op(int cmd, int cpu, void *arg); + +extern long xencomm_hypercall_opt_feature(void *arg); + +extern int xencomm_hypercall_kexec_op(int cmd, void *arg); + +#endif /* _LINUX_XENCOMM_HCALL_H_ */ diff --git a/include/asm-ia64/xen/xencomm.h b/include/asm-ia64/xen/xencomm.h new file mode 100644 index 0000000..cc27a5f --- /dev/null +++ b/include/asm-ia64/xen/xencomm.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) 2006 Hollis Blanchard <hollisb@xxxxxxxxxx>, IBM Corporation + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef _ASM_IA64_XENCOMM_H_ +#define _ASM_IA64_XENCOMM_H_ + +#define is_kernel_addr(x) \ + ((PAGE_OFFSET <= (x) && \ + (x) < (PAGE_OFFSET + (1UL << IA64_MAX_PHYS_BITS))) || \ + (KERNEL_START <= (x) && \ + (x) < KERNEL_START + KERNEL_TR_PAGE_SIZE)) + +/* Must be called before any hypercall. */ +extern void xencomm_initialize(void); + +#include <xen/xencomm.h> + +#endif /* _ASM_IA64_XENCOMM_H_ */ -- 1.5.3 - To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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