1 /******************************************************************************
2 * arch/ia64/xen/xen_pv_ops.c
4 * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
5 * VA Linux Systems Japan K.K.
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/console.h>
24 #include <linux/irq.h>
25 #include <linux/kernel.h>
27 #include <linux/unistd.h>
29 #include <asm/xen/hypervisor.h>
30 #include <asm/xen/xencomm.h>
31 #include <asm/xen/privop.h>
36 /***************************************************************************
39 static struct pv_info xen_info __initdata = {
40 .kernel_rpl = 2, /* or 1: determin at runtime */
41 .paravirt_enabled = 1,
45 #define IA64_RSC_PL_SHIFT 2
46 #define IA64_RSC_PL_BIT_SIZE 2
47 #define IA64_RSC_PL_MASK \
48 (((1UL << IA64_RSC_PL_BIT_SIZE) - 1) << IA64_RSC_PL_SHIFT)
53 /* Xenified Linux/ia64 may run on pl = 1 or 2.
54 * determin at run time. */
55 unsigned long rsc = ia64_getreg(_IA64_REG_AR_RSC);
56 unsigned int rpl = (rsc & IA64_RSC_PL_MASK) >> IA64_RSC_PL_SHIFT;
57 xen_info.kernel_rpl = rpl;
60 /***************************************************************************
62 * initialization hooks.
66 xen_panic_hypercall(struct unw_frame_info *info, void *arg)
68 current->thread.ksp = (__u64)info->sw - 16;
69 HYPERVISOR_shutdown(SHUTDOWN_crash);
70 /* we're never actually going to get here... */
74 xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
76 unw_init_running(xen_panic_hypercall, NULL);
77 /* we're never actually going to get here... */
81 static struct notifier_block xen_panic_block = {
82 xen_panic_event, NULL, 0 /* try to go last */
85 static void xen_pm_power_off(void)
88 HYPERVISOR_shutdown(SHUTDOWN_poweroff);
95 "Running on Xen! pl = %d start_info_pfn=0x%lx nr_pages=%ld "
98 HYPERVISOR_shared_info->arch.start_info_pfn,
99 xen_start_info->nr_pages, xen_start_info->flags);
103 xen_reserve_memory(struct rsvd_region *region)
105 region->start = (unsigned long)__va(
106 (HYPERVISOR_shared_info->arch.start_info_pfn << PAGE_SHIFT));
107 region->end = region->start + PAGE_SIZE;
112 xen_arch_setup_early(void)
114 struct shared_info *s;
115 BUG_ON(!xen_pv_domain());
117 s = HYPERVISOR_shared_info;
118 xen_start_info = __va(s->arch.start_info_pfn << PAGE_SHIFT);
120 /* Must be done before any hypercall. */
121 xencomm_initialize();
123 xen_setup_features();
124 /* Register a call for panic conditions. */
125 atomic_notifier_chain_register(&panic_notifier_list,
127 pm_power_off = xen_pm_power_off;
129 xen_ia64_enable_opt_feature();
133 xen_arch_setup_console(char **cmdline_p)
135 add_preferred_console("xenboot", 0, NULL);
136 add_preferred_console("tty", 0, NULL);
138 add_preferred_console("hvc", 0, NULL);
140 #if !defined(CONFIG_VT) || !defined(CONFIG_DUMMY_CONSOLE)
146 xen_arch_setup_nomca(void)
152 xen_post_smp_prepare_boot_cpu(void)
154 xen_setup_vcpu_info_placement();
158 static unsigned long __init_or_module
159 xen_patch_bundle(void *sbundle, void *ebundle, unsigned long type);
162 xen_patch_branch(unsigned long tag, unsigned long type);
164 static const struct pv_init_ops xen_init_ops __initconst = {
165 .banner = xen_banner,
167 .reserve_memory = xen_reserve_memory,
169 .arch_setup_early = xen_arch_setup_early,
170 .arch_setup_console = xen_arch_setup_console,
171 .arch_setup_nomca = xen_arch_setup_nomca,
173 .post_smp_prepare_boot_cpu = xen_post_smp_prepare_boot_cpu,
175 .patch_bundle = xen_patch_bundle,
177 .patch_branch = xen_patch_branch,
180 /***************************************************************************
185 extern unsigned long xen_fsyscall_table[NR_syscalls];
186 extern char xen_fsys_bubble_down[];
187 struct pv_fsys_data xen_fsys_data __initdata = {
188 .fsyscall_table = (unsigned long *)xen_fsyscall_table,
189 .fsys_bubble_down = (void *)xen_fsys_bubble_down,
192 /***************************************************************************
194 * patchdata addresses
197 #define DECLARE(name) \
198 extern unsigned long __xen_start_gate_##name##_patchlist[]; \
199 extern unsigned long __xen_end_gate_##name##_patchlist[]
202 DECLARE(brl_fsys_bubble_down);
204 DECLARE(mckinley_e9);
206 extern unsigned long __xen_start_gate_section[];
208 #define ASSIGN(name) \
209 .start_##name##_patchlist = \
210 (unsigned long)__xen_start_gate_##name##_patchlist, \
211 .end_##name##_patchlist = \
212 (unsigned long)__xen_end_gate_##name##_patchlist
214 static struct pv_patchdata xen_patchdata __initdata = {
216 ASSIGN(brl_fsys_bubble_down),
220 .gate_section = (void*)__xen_start_gate_section,
223 /***************************************************************************
228 #ifndef ASM_SUPPORTED
230 xen_set_itm_with_offset(unsigned long val)
232 /* ia64_cpu_local_tick() calls this with interrupt enabled. */
233 /* WARN_ON(!irqs_disabled()); */
234 xen_set_itm(val - XEN_MAPPEDREGS->itc_offset);
238 xen_get_itm_with_offset(void)
240 /* unused at this moment */
241 printk(KERN_DEBUG "%s is called.\n", __func__);
243 WARN_ON(!irqs_disabled());
244 return ia64_native_getreg(_IA64_REG_CR_ITM) +
245 XEN_MAPPEDREGS->itc_offset;
248 /* ia64_set_itc() is only called by
249 * cpu_init() with ia64_set_itc(0) and ia64_sync_itc().
250 * So XEN_MAPPEDRESG->itc_offset cal be considered as almost constant.
253 xen_set_itc(unsigned long val)
257 WARN_ON(!irqs_disabled());
258 mitc = ia64_native_getreg(_IA64_REG_AR_ITC);
259 XEN_MAPPEDREGS->itc_offset = val - mitc;
260 XEN_MAPPEDREGS->itc_last = val;
267 unsigned long itc_offset;
268 unsigned long itc_last;
269 unsigned long ret_itc_last;
271 itc_offset = XEN_MAPPEDREGS->itc_offset;
273 itc_last = XEN_MAPPEDREGS->itc_last;
274 res = ia64_native_getreg(_IA64_REG_AR_ITC);
278 ret_itc_last = cmpxchg(&XEN_MAPPEDREGS->itc_last,
280 } while (unlikely(ret_itc_last != itc_last));
284 /* ia64_itc_udelay() calls ia64_get_itc() with interrupt enabled.
285 Should it be paravirtualized instead? */
286 WARN_ON(!irqs_disabled());
287 itc_offset = XEN_MAPPEDREGS->itc_offset;
288 itc_last = XEN_MAPPEDREGS->itc_last;
289 res = ia64_native_getreg(_IA64_REG_AR_ITC);
293 XEN_MAPPEDREGS->itc_last = res;
298 static void xen_setreg(int regnum, unsigned long val)
301 case _IA64_REG_AR_KR0 ... _IA64_REG_AR_KR7:
302 xen_set_kr(regnum - _IA64_REG_AR_KR0, val);
304 case _IA64_REG_AR_ITC:
307 case _IA64_REG_CR_TPR:
310 case _IA64_REG_CR_ITM:
311 xen_set_itm_with_offset(val);
313 case _IA64_REG_CR_EOI:
317 ia64_native_setreg_func(regnum, val);
322 static unsigned long xen_getreg(int regnum)
330 case _IA64_REG_AR_ITC:
333 case _IA64_REG_CR_ITM:
334 res = xen_get_itm_with_offset();
336 case _IA64_REG_CR_IVR:
339 case _IA64_REG_CR_TPR:
343 res = ia64_native_getreg_func(regnum);
349 /* turning on interrupts is a bit more complicated.. write to the
350 * memory-mapped virtual psr.i bit first (to avoid race condition),
351 * then if any interrupts were pending, we have to execute a hyperprivop
352 * to ensure the pending interrupt gets delivered; else we're done! */
356 int old = xen_get_virtual_psr_i();
357 xen_set_virtual_psr_i(1);
359 if (!old && xen_get_virtual_pend())
363 /* turning off interrupts can be paravirtualized simply by writing
364 * to a memory-mapped virtual psr.i bit (implemented as a 16-bit bool) */
368 xen_set_virtual_psr_i(0);
375 return xen_get_virtual_psr_i() ? IA64_PSR_I : 0;
379 xen_intrin_local_irq_restore(unsigned long mask)
381 if (mask & IA64_PSR_I)
387 #define __DEFINE_FUNC(name, code) \
388 extern const char xen_ ## name ## _direct_start[]; \
389 extern const char xen_ ## name ## _direct_end[]; \
391 ".proc xen_" #name "\n" \
393 "xen_" #name "_direct_start:\n" \
395 "xen_" #name "_direct_end:\n" \
396 "br.cond.sptk.many b6\n" \
397 ".endp xen_" #name "\n")
399 #define DEFINE_VOID_FUNC0(name, code) \
401 xen_ ## name (void); \
402 __DEFINE_FUNC(name, code)
404 #define DEFINE_VOID_FUNC1(name, code) \
406 xen_ ## name (unsigned long arg); \
407 __DEFINE_FUNC(name, code)
409 #define DEFINE_VOID_FUNC1_VOID(name, code) \
411 xen_ ## name (void *arg); \
412 __DEFINE_FUNC(name, code)
414 #define DEFINE_VOID_FUNC2(name, code) \
416 xen_ ## name (unsigned long arg0, \
417 unsigned long arg1); \
418 __DEFINE_FUNC(name, code)
420 #define DEFINE_FUNC0(name, code) \
421 extern unsigned long \
422 xen_ ## name (void); \
423 __DEFINE_FUNC(name, code)
425 #define DEFINE_FUNC1(name, type, code) \
426 extern unsigned long \
427 xen_ ## name (type arg); \
428 __DEFINE_FUNC(name, code)
430 #define XEN_PSR_I_ADDR_ADDR (XSI_BASE + XSI_PSR_I_ADDR_OFS)
433 * static void xen_set_itm_with_offset(unsigned long val)
434 * xen_set_itm(val - XEN_MAPPEDREGS->itc_offset);
437 DEFINE_VOID_FUNC1(set_itm_with_offset,
438 "mov r2 = " __stringify(XSI_BASE) " + "
439 __stringify(XSI_ITC_OFFSET_OFS) "\n"
444 "break " __stringify(HYPERPRIVOP_SET_ITM) "\n");
447 * static unsigned long xen_get_itm_with_offset(void)
448 * return ia64_native_getreg(_IA64_REG_CR_ITM) + XEN_MAPPEDREGS->itc_offset;
451 DEFINE_FUNC0(get_itm_with_offset,
452 "mov r2 = " __stringify(XSI_BASE) " + "
453 __stringify(XSI_ITC_OFFSET_OFS) "\n"
458 "add r8 = r8, r2\n");
461 * static void xen_set_itc(unsigned long val)
462 * unsigned long mitc;
464 * WARN_ON(!irqs_disabled());
465 * mitc = ia64_native_getreg(_IA64_REG_AR_ITC);
466 * XEN_MAPPEDREGS->itc_offset = val - mitc;
467 * XEN_MAPPEDREGS->itc_last = val;
470 DEFINE_VOID_FUNC1(set_itc,
471 "mov r2 = " __stringify(XSI_BASE) " + "
472 __stringify(XSI_ITC_LAST_OFS) "\n"
477 __stringify(XSI_ITC_LAST_OFS) " - "
478 __stringify(XSI_ITC_OFFSET_OFS) "\n"
483 * static unsigned long xen_get_itc(void)
485 * unsigned long itc_offset;
486 * unsigned long itc_last;
487 * unsigned long ret_itc_last;
489 * itc_offset = XEN_MAPPEDREGS->itc_offset;
491 * itc_last = XEN_MAPPEDREGS->itc_last;
492 * res = ia64_native_getreg(_IA64_REG_AR_ITC);
494 * if (itc_last >= res)
495 * res = itc_last + 1;
496 * ret_itc_last = cmpxchg(&XEN_MAPPEDREGS->itc_last,
498 * } while (unlikely(ret_itc_last != itc_last));
502 DEFINE_FUNC0(get_itc,
503 "mov r2 = " __stringify(XSI_BASE) " + "
504 __stringify(XSI_ITC_OFFSET_OFS) "\n"
506 "ld8 r9 = [r2], " __stringify(XSI_ITC_LAST_OFS) " - "
507 __stringify(XSI_ITC_OFFSET_OFS) "\n"
508 /* r9 = itc_offset */
509 /* r2 = XSI_ITC_OFFSET */
511 "mov r8 = ar.itc\n" /* res = ar.itc */
513 "ld8 r3 = [r2]\n" /* r3 = itc_last */
514 "add r8 = r8, r9\n" /* res = ar.itc + itc_offset */
516 "cmp.gtu p6, p0 = r3, r8\n"
518 "(p6) add r8 = 1, r3\n" /* if (itc_last > res) itc_last + 1 */
522 "cmpxchg8.acq r10 = [r2], r8, ar.ccv\n"
524 "cmp.ne p6, p0 = r10, r3\n"
526 "(p6) br.cond.spnt 888b\n");
528 DEFINE_VOID_FUNC1_VOID(fc,
529 "break " __stringify(HYPERPRIVOP_FC) "\n");
532 * psr_i_addr_addr = XEN_PSR_I_ADDR_ADDR
533 * masked_addr = *psr_i_addr_addr
534 * pending_intr_addr = masked_addr - 1
535 * if (val & IA64_PSR_I) {
536 * masked = *masked_addr
537 * *masked_addr = 0:xen_set_virtual_psr_i(1)
540 * uint8_t pending = *pending_intr_addr;
545 * *masked_addr = 1:xen_set_virtual_psr_i(0)
549 DEFINE_VOID_FUNC1(intrin_local_irq_restore,
550 /* r8 = input value: 0 or IA64_PSR_I
551 * p6 = (flags & IA64_PSR_I)
553 * p7 = !(flags & IA64_PSR_I)
556 "cmp.ne p6, p7 = r8, r0\n"
557 "mov r9 = " __stringify(XEN_PSR_I_ADDR_ADDR) "\n"
559 /* r9 = XEN_PSR_I_ADDR */
563 /* r10 = masked previous value */
564 "(p6) ld1.acq r10 = [r9]\n"
567 /* p8 = !masked interrupt masked previously? */
568 "(p6) cmp.ne.unc p8, p0 = r10, r0\n"
570 /* p7 = else clause */
574 "(p7) st1.rel [r9] = r11\n"
578 * r9 = masked_addr - 1
579 * = pending_intr_addr
581 "(p8) st1.rel [r9] = r0, -1\n"
583 /* r8 = pending_intr */
584 "(p8) ld1.acq r11 = [r9]\n"
586 /* p9 = interrupt pending? */
587 "(p8) cmp.ne.unc p9, p10 = r11, r0\n"
590 /* issue hypercall to trigger interrupt */
591 "(p9) break " __stringify(HYPERPRIVOP_SSM_I) "\n");
593 DEFINE_VOID_FUNC2(ptcga,
594 "break " __stringify(HYPERPRIVOP_PTC_GA) "\n");
595 DEFINE_VOID_FUNC2(set_rr,
596 "break " __stringify(HYPERPRIVOP_SET_RR) "\n");
599 * tmp = XEN_MAPPEDREGS->interrupt_mask_addr = XEN_PSR_I_ADDR_ADDR;
602 * psr_i = tmp? 0: IA64_PSR_I;
605 DEFINE_FUNC0(get_psr_i,
606 "mov r9 = " __stringify(XEN_PSR_I_ADDR_ADDR) "\n"
608 "ld8 r9 = [r9]\n" /* r9 = XEN_PSR_I_ADDR */
609 "mov r8 = 0\n" /* psr_i = 0 */
611 "ld1.acq r9 = [r9]\n" /* r9 = XEN_PSR_I */
613 "cmp.eq.unc p6, p0 = r9, r0\n" /* p6 = (XEN_PSR_I != 0) */
615 "(p6) mov r8 = " __stringify(1 << IA64_PSR_I_BIT) "\n");
617 DEFINE_FUNC1(thash, unsigned long,
618 "break " __stringify(HYPERPRIVOP_THASH) "\n");
619 DEFINE_FUNC1(get_cpuid, int,
620 "break " __stringify(HYPERPRIVOP_GET_CPUID) "\n");
621 DEFINE_FUNC1(get_pmd, int,
622 "break " __stringify(HYPERPRIVOP_GET_PMD) "\n");
623 DEFINE_FUNC1(get_rr, unsigned long,
624 "break " __stringify(HYPERPRIVOP_GET_RR) "\n");
627 * void xen_privop_ssm_i(void)
629 * int masked = !xen_get_virtual_psr_i();
630 * // masked = *(*XEN_MAPPEDREGS->interrupt_mask_addr)
631 * xen_set_virtual_psr_i(1)
632 * // *(*XEN_MAPPEDREGS->interrupt_mask_addr) = 0
633 * // compiler barrier
635 * uint8_t* pend_int_addr =
636 * (uint8_t*)(*XEN_MAPPEDREGS->interrupt_mask_addr) - 1;
637 * uint8_t pending = *pend_int_addr;
643 DEFINE_VOID_FUNC0(ssm_i,
644 "mov r8 = " __stringify(XEN_PSR_I_ADDR_ADDR) "\n"
646 "ld8 r8 = [r8]\n" /* r8 = XEN_PSR_I_ADDR */
648 "ld1.acq r9 = [r8]\n" /* r9 = XEN_PSR_I */
650 "st1.rel [r8] = r0, -1\n" /* psr_i = 0. enable interrupt
651 * r8 = XEN_PSR_I_ADDR - 1
654 "cmp.eq.unc p0, p6 = r9, r0\n"/* p6 = !XEN_PSR_I
655 * previously interrupt
659 "(p6) ld1.acq r8 = [r8]\n" /* r8 = xen_pend_int */
661 "(p6) cmp.eq.unc p6, p7 = r8, r0\n" /*interrupt pending?*/
663 /* issue hypercall to get interrupt */
664 "(p7) break " __stringify(HYPERPRIVOP_SSM_I) "\n"
668 * psr_i_addr_addr = XEN_MAPPEDREGS->interrupt_mask_addr
669 * = XEN_PSR_I_ADDR_ADDR;
670 * psr_i_addr = *psr_i_addr_addr;
674 DEFINE_VOID_FUNC0(rsm_i,
675 "mov r8 = " __stringify(XEN_PSR_I_ADDR_ADDR) "\n"
676 /* r8 = XEN_PSR_I_ADDR */
679 "ld8 r8 = [r8]\n" /* r8 = XEN_PSR_I */
681 "st1.rel [r8] = r9\n"); /* XEN_PSR_I = 1 */
684 xen_set_rr0_to_rr4(unsigned long val0, unsigned long val1,
685 unsigned long val2, unsigned long val3,
687 __DEFINE_FUNC(set_rr0_to_rr4,
688 "break " __stringify(HYPERPRIVOP_SET_RR0_TO_RR4) "\n");
691 extern unsigned long xen_getreg(int regnum);
692 #define __DEFINE_GET_REG(id, privop) \
693 "mov r2 = " __stringify(_IA64_REG_ ## id) "\n" \
695 "cmp.eq p6, p0 = r2, r8\n" \
697 "(p6) break " __stringify(HYPERPRIVOP_GET_ ## privop) "\n" \
698 "(p6) br.cond.sptk.many b6\n" \
701 __DEFINE_FUNC(getreg,
702 __DEFINE_GET_REG(PSR, PSR)
705 "mov r2 = " __stringify(_IA64_REG_AR_ITC) "\n"
707 "cmp.eq p6, p0 = r2, r8\n"
709 "(p6) br.cond.spnt xen_get_itc\n"
713 "mov r2 = " __stringify(_IA64_REG_CR_ITM) "\n"
715 "cmp.eq p6, p0 = r2, r8\n"
717 "(p6) br.cond.spnt xen_get_itm_with_offset\n"
720 __DEFINE_GET_REG(CR_IVR, IVR)
721 __DEFINE_GET_REG(CR_TPR, TPR)
724 "movl r2 = ia64_native_getreg_func\n"
728 "br.cond.sptk.many b7\n");
730 extern void xen_setreg(int regnum, unsigned long val);
731 #define __DEFINE_SET_REG(id, privop) \
732 "mov r2 = " __stringify(_IA64_REG_ ## id) "\n" \
734 "cmp.eq p6, p0 = r2, r9\n" \
736 "(p6) break " __stringify(HYPERPRIVOP_ ## privop) "\n" \
737 "(p6) br.cond.sptk.many b6\n" \
740 __DEFINE_FUNC(setreg,
743 * if (_IA64_REG_AR_KR0 <= regnum &&
744 * regnum <= _IA64_REG_AR_KR7) {
745 * register __index asm ("r8") = regnum - _IA64_REG_AR_KR0
746 * register __val asm ("r9") = val
747 * "break HYPERPRIVOP_SET_KR"
751 "mov r2 = " __stringify(_IA64_REG_AR_KR0) "\n"
753 "cmp.ge p6, p0 = r9, r2\n"
754 "sub r17 = r17, r2\n"
756 "(p6) cmp.ge.unc p7, p0 = "
757 __stringify(_IA64_REG_AR_KR7) " - " __stringify(_IA64_REG_AR_KR0)
762 "(p7) mov r8 = r17\n"
763 "(p7) break " __stringify(HYPERPRIVOP_SET_KR) "\n"
766 "mov r2 = " __stringify(_IA64_REG_CR_ITM) "\n"
768 "cmp.eq p6, p0 = r2, r8\n"
770 "(p6) br.cond.spnt xen_set_itm_with_offset\n"
773 "mov r2 = " __stringify(_IA64_REG_AR_ITC) "\n"
775 "cmp.eq p6, p0 = r2, r8\n"
777 "(p6) br.cond.spnt xen_set_itc\n"
779 __DEFINE_SET_REG(CR_TPR, SET_TPR)
780 __DEFINE_SET_REG(CR_EOI, EOI)
783 "movl r2 = ia64_native_setreg_func\n"
787 "br.cond.sptk.many b7\n");
790 static const struct pv_cpu_ops xen_cpu_ops __initconst = {
793 .get_cpuid = xen_get_cpuid,
794 .get_pmd = xen_get_pmd,
795 .getreg = xen_getreg,
796 .setreg = xen_setreg,
798 .get_rr = xen_get_rr,
799 .set_rr = xen_set_rr,
800 .set_rr0_to_rr4 = xen_set_rr0_to_rr4,
803 .get_psr_i = xen_get_psr_i,
804 .intrin_local_irq_restore
805 = xen_intrin_local_irq_restore,
808 /******************************************************************************
809 * replacement of hand written assembly codes.
812 extern char xen_switch_to;
813 extern char xen_leave_syscall;
814 extern char xen_work_processed_syscall;
815 extern char xen_leave_kernel;
817 const struct pv_cpu_asm_switch xen_cpu_asm_switch = {
818 .switch_to = (unsigned long)&xen_switch_to,
819 .leave_syscall = (unsigned long)&xen_leave_syscall,
820 .work_processed_syscall = (unsigned long)&xen_work_processed_syscall,
821 .leave_kernel = (unsigned long)&xen_leave_kernel,
824 /***************************************************************************
826 * iosapic read/write hooks.
829 xen_pcat_compat_init(void)
834 static struct irq_chip*
835 xen_iosapic_get_irq_chip(unsigned long trigger)
841 xen_iosapic_read(char __iomem *iosapic, unsigned int reg)
843 struct physdev_apic apic_op;
846 apic_op.apic_physbase = (unsigned long)iosapic -
847 __IA64_UNCACHED_OFFSET;
849 ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
852 return apic_op.value;
856 xen_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
858 struct physdev_apic apic_op;
860 apic_op.apic_physbase = (unsigned long)iosapic -
861 __IA64_UNCACHED_OFFSET;
864 HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op);
867 static struct pv_iosapic_ops xen_iosapic_ops __initdata = {
868 .pcat_compat_init = xen_pcat_compat_init,
869 .__get_irq_chip = xen_iosapic_get_irq_chip,
871 .__read = xen_iosapic_read,
872 .__write = xen_iosapic_write,
875 /***************************************************************************
876 * pv_ops initialization
880 xen_setup_pv_ops(void)
884 pv_init_ops = xen_init_ops;
885 pv_fsys_data = xen_fsys_data;
886 pv_patchdata = xen_patchdata;
887 pv_cpu_ops = xen_cpu_ops;
888 pv_iosapic_ops = xen_iosapic_ops;
889 pv_irq_ops = xen_irq_ops;
890 pv_time_ops = xen_time_ops;
892 paravirt_cpu_asm_init(&xen_cpu_asm_switch);
896 /***************************************************************************
898 * pv_init_ops.patch_bundle
901 #define DEFINE_FUNC_GETREG(name, privop) \
902 DEFINE_FUNC0(get_ ## name, \
903 "break "__stringify(HYPERPRIVOP_GET_ ## privop) "\n")
905 DEFINE_FUNC_GETREG(psr, PSR);
906 DEFINE_FUNC_GETREG(eflag, EFLAG);
907 DEFINE_FUNC_GETREG(ivr, IVR);
908 DEFINE_FUNC_GETREG(tpr, TPR);
910 #define DEFINE_FUNC_SET_KR(n) \
911 DEFINE_VOID_FUNC0(set_kr ## n, \
914 "mov r8 = " #n "\n" \
915 "break " __stringify(HYPERPRIVOP_SET_KR) "\n")
917 DEFINE_FUNC_SET_KR(0);
918 DEFINE_FUNC_SET_KR(1);
919 DEFINE_FUNC_SET_KR(2);
920 DEFINE_FUNC_SET_KR(3);
921 DEFINE_FUNC_SET_KR(4);
922 DEFINE_FUNC_SET_KR(5);
923 DEFINE_FUNC_SET_KR(6);
924 DEFINE_FUNC_SET_KR(7);
926 #define __DEFINE_FUNC_SETREG(name, privop) \
927 DEFINE_VOID_FUNC0(name, \
928 "break "__stringify(HYPERPRIVOP_ ## privop) "\n")
930 #define DEFINE_FUNC_SETREG(name, privop) \
931 __DEFINE_FUNC_SETREG(set_ ## name, SET_ ## privop)
933 DEFINE_FUNC_SETREG(eflag, EFLAG);
934 DEFINE_FUNC_SETREG(tpr, TPR);
935 __DEFINE_FUNC_SETREG(eoi, EOI);
937 extern const char xen_check_events[];
938 extern const char __xen_intrin_local_irq_restore_direct_start[];
939 extern const char __xen_intrin_local_irq_restore_direct_end[];
940 extern const unsigned long __xen_intrin_local_irq_restore_direct_reloc;
944 ".proc xen_check_events\n"
945 "xen_check_events:\n"
947 * r9 = masked_addr - 1
948 * = pending_intr_addr
950 "st1.rel [r9] = r0, -1\n"
952 /* r8 = pending_intr */
953 "ld1.acq r11 = [r9]\n"
955 /* p9 = interrupt pending? */
956 "cmp.ne p9, p10 = r11, r0\n"
959 /* issue hypercall to trigger interrupt */
960 "(p9) break " __stringify(HYPERPRIVOP_SSM_I) "\n"
961 "br.cond.sptk.many b6\n"
962 ".endp xen_check_events\n"
965 ".proc __xen_intrin_local_irq_restore_direct\n"
966 "__xen_intrin_local_irq_restore_direct:\n"
967 "__xen_intrin_local_irq_restore_direct_start:\n"
970 "cmp.ne p6, p7 = r8, r0\n"
971 "mov r17 = ip\n" /* get ip to calc return address */
972 "mov r9 = "__stringify(XEN_PSR_I_ADDR_ADDR) "\n"
976 /* r9 = XEN_PSR_I_ADDR */
979 /* r10 = masked previous value */
980 "(p6) ld1.acq r10 = [r9]\n"
981 "adds r17 = 1f - 1b, r17\n" /* calculate return address */
985 /* p8 = !masked interrupt masked previously? */
986 "(p6) cmp.ne.unc p8, p0 = r10, r0\n"
988 /* p7 = else clause */
991 "(p8) mov b6 = r17\n" /* set return address */
995 "(p7) st1.rel [r9] = r11\n"
998 "(p8) brl.cond.dptk.few xen_check_events\n"
1000 /* pv calling stub is 5 bundles. fill nop to adjust return address */
1007 "__xen_intrin_local_irq_restore_direct_end:\n"
1008 ".endp __xen_intrin_local_irq_restore_direct\n"
1011 "__xen_intrin_local_irq_restore_direct_reloc:\n"
1015 static struct paravirt_patch_bundle_elem xen_patch_bundle_elems[]
1016 __initdata_or_module =
1018 #define XEN_PATCH_BUNDLE_ELEM(name, type) \
1020 (void*)xen_ ## name ## _direct_start, \
1021 (void*)xen_ ## name ## _direct_end, \
1022 PARAVIRT_PATCH_TYPE_ ## type, \
1025 XEN_PATCH_BUNDLE_ELEM(fc, FC),
1026 XEN_PATCH_BUNDLE_ELEM(thash, THASH),
1027 XEN_PATCH_BUNDLE_ELEM(get_cpuid, GET_CPUID),
1028 XEN_PATCH_BUNDLE_ELEM(get_pmd, GET_PMD),
1029 XEN_PATCH_BUNDLE_ELEM(ptcga, PTCGA),
1030 XEN_PATCH_BUNDLE_ELEM(get_rr, GET_RR),
1031 XEN_PATCH_BUNDLE_ELEM(set_rr, SET_RR),
1032 XEN_PATCH_BUNDLE_ELEM(set_rr0_to_rr4, SET_RR0_TO_RR4),
1033 XEN_PATCH_BUNDLE_ELEM(ssm_i, SSM_I),
1034 XEN_PATCH_BUNDLE_ELEM(rsm_i, RSM_I),
1035 XEN_PATCH_BUNDLE_ELEM(get_psr_i, GET_PSR_I),
1037 (void*)__xen_intrin_local_irq_restore_direct_start,
1038 (void*)__xen_intrin_local_irq_restore_direct_end,
1039 PARAVIRT_PATCH_TYPE_INTRIN_LOCAL_IRQ_RESTORE,
1042 #define XEN_PATCH_BUNDLE_ELEM_GETREG(name, reg) \
1044 xen_get_ ## name ## _direct_start, \
1045 xen_get_ ## name ## _direct_end, \
1046 PARAVIRT_PATCH_TYPE_GETREG + _IA64_REG_ ## reg, \
1049 XEN_PATCH_BUNDLE_ELEM_GETREG(psr, PSR),
1050 XEN_PATCH_BUNDLE_ELEM_GETREG(eflag, AR_EFLAG),
1052 XEN_PATCH_BUNDLE_ELEM_GETREG(ivr, CR_IVR),
1053 XEN_PATCH_BUNDLE_ELEM_GETREG(tpr, CR_TPR),
1055 XEN_PATCH_BUNDLE_ELEM_GETREG(itc, AR_ITC),
1056 XEN_PATCH_BUNDLE_ELEM_GETREG(itm_with_offset, CR_ITM),
1059 #define __XEN_PATCH_BUNDLE_ELEM_SETREG(name, reg) \
1061 xen_ ## name ## _direct_start, \
1062 xen_ ## name ## _direct_end, \
1063 PARAVIRT_PATCH_TYPE_SETREG + _IA64_REG_ ## reg, \
1066 #define XEN_PATCH_BUNDLE_ELEM_SETREG(name, reg) \
1067 __XEN_PATCH_BUNDLE_ELEM_SETREG(set_ ## name, reg)
1069 XEN_PATCH_BUNDLE_ELEM_SETREG(kr0, AR_KR0),
1070 XEN_PATCH_BUNDLE_ELEM_SETREG(kr1, AR_KR1),
1071 XEN_PATCH_BUNDLE_ELEM_SETREG(kr2, AR_KR2),
1072 XEN_PATCH_BUNDLE_ELEM_SETREG(kr3, AR_KR3),
1073 XEN_PATCH_BUNDLE_ELEM_SETREG(kr4, AR_KR4),
1074 XEN_PATCH_BUNDLE_ELEM_SETREG(kr5, AR_KR5),
1075 XEN_PATCH_BUNDLE_ELEM_SETREG(kr6, AR_KR6),
1076 XEN_PATCH_BUNDLE_ELEM_SETREG(kr7, AR_KR7),
1078 XEN_PATCH_BUNDLE_ELEM_SETREG(eflag, AR_EFLAG),
1079 XEN_PATCH_BUNDLE_ELEM_SETREG(tpr, CR_TPR),
1080 __XEN_PATCH_BUNDLE_ELEM_SETREG(eoi, CR_EOI),
1082 XEN_PATCH_BUNDLE_ELEM_SETREG(itc, AR_ITC),
1083 XEN_PATCH_BUNDLE_ELEM_SETREG(itm_with_offset, CR_ITM),
1086 static unsigned long __init_or_module
1087 xen_patch_bundle(void *sbundle, void *ebundle, unsigned long type)
1089 const unsigned long nelems = sizeof(xen_patch_bundle_elems) /
1090 sizeof(xen_patch_bundle_elems[0]);
1092 const struct paravirt_patch_bundle_elem *found;
1094 used = __paravirt_patch_apply_bundle(sbundle, ebundle, type,
1095 xen_patch_bundle_elems, nelems,
1100 return ia64_native_patch_bundle(sbundle, ebundle, type);
1106 case PARAVIRT_PATCH_TYPE_INTRIN_LOCAL_IRQ_RESTORE: {
1107 unsigned long reloc =
1108 __xen_intrin_local_irq_restore_direct_reloc;
1109 unsigned long reloc_offset = reloc - (unsigned long)
1110 __xen_intrin_local_irq_restore_direct_start;
1111 unsigned long tag = (unsigned long)sbundle + reloc_offset;
1112 paravirt_patch_reloc_brl(tag, xen_check_events);
1121 #endif /* ASM_SUPPOTED */
1123 const struct paravirt_patch_branch_target xen_branch_target[]
1125 #define PARAVIRT_BR_TARGET(name, type) \
1128 PARAVIRT_PATCH_TYPE_BR_ ## type, \
1130 PARAVIRT_BR_TARGET(switch_to, SWITCH_TO),
1131 PARAVIRT_BR_TARGET(leave_syscall, LEAVE_SYSCALL),
1132 PARAVIRT_BR_TARGET(work_processed_syscall, WORK_PROCESSED_SYSCALL),
1133 PARAVIRT_BR_TARGET(leave_kernel, LEAVE_KERNEL),
1137 xen_patch_branch(unsigned long tag, unsigned long type)
1139 const unsigned long nelem =
1140 sizeof(xen_branch_target) / sizeof(xen_branch_target[0]);
1141 __paravirt_patch_apply_branch(tag, type, xen_branch_target, nelem);