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7120569c76
This patch removes the following warnings and related ones. Plus some cosmetics. arch/ia64/kernel/patch.c:112: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast arch/ia64/kernel/patch.c:135: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast arch/ia64/kernel/patch.c:166: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast arch/ia64/kernel/patch.c:202: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast arch/ia64/kernel/patch.c:220: warning: passing argument 1 of 'paravirt_fc' makes integer from pointer without a cast Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
1159 lines
30 KiB
C
1159 lines
30 KiB
C
/******************************************************************************
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* arch/ia64/xen/xen_pv_ops.c
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*
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* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/console.h>
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#include <linux/irq.h>
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#include <linux/kernel.h>
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#include <linux/pm.h>
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#include <linux/unistd.h>
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#include <asm/xen/hypervisor.h>
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#include <asm/xen/xencomm.h>
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#include <asm/xen/privop.h>
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#include "irq_xen.h"
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#include "time.h"
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/***************************************************************************
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* general info
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*/
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static struct pv_info xen_info __initdata = {
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.kernel_rpl = 2, /* or 1: determin at runtime */
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.paravirt_enabled = 1,
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.name = "Xen/ia64",
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};
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#define IA64_RSC_PL_SHIFT 2
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#define IA64_RSC_PL_BIT_SIZE 2
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#define IA64_RSC_PL_MASK \
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(((1UL << IA64_RSC_PL_BIT_SIZE) - 1) << IA64_RSC_PL_SHIFT)
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static void __init
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xen_info_init(void)
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{
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/* Xenified Linux/ia64 may run on pl = 1 or 2.
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* determin at run time. */
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unsigned long rsc = ia64_getreg(_IA64_REG_AR_RSC);
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unsigned int rpl = (rsc & IA64_RSC_PL_MASK) >> IA64_RSC_PL_SHIFT;
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xen_info.kernel_rpl = rpl;
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}
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/***************************************************************************
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* pv_init_ops
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* initialization hooks.
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*/
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static void
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xen_panic_hypercall(struct unw_frame_info *info, void *arg)
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{
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current->thread.ksp = (__u64)info->sw - 16;
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HYPERVISOR_shutdown(SHUTDOWN_crash);
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/* we're never actually going to get here... */
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}
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static int
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xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr)
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{
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unw_init_running(xen_panic_hypercall, NULL);
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/* we're never actually going to get here... */
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return NOTIFY_DONE;
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}
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static struct notifier_block xen_panic_block = {
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xen_panic_event, NULL, 0 /* try to go last */
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};
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static void xen_pm_power_off(void)
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{
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local_irq_disable();
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HYPERVISOR_shutdown(SHUTDOWN_poweroff);
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}
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static void __init
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xen_banner(void)
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{
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printk(KERN_INFO
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"Running on Xen! pl = %d start_info_pfn=0x%lx nr_pages=%ld "
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"flags=0x%x\n",
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xen_info.kernel_rpl,
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HYPERVISOR_shared_info->arch.start_info_pfn,
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xen_start_info->nr_pages, xen_start_info->flags);
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}
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static int __init
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xen_reserve_memory(struct rsvd_region *region)
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{
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region->start = (unsigned long)__va(
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(HYPERVISOR_shared_info->arch.start_info_pfn << PAGE_SHIFT));
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region->end = region->start + PAGE_SIZE;
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return 1;
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}
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static void __init
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xen_arch_setup_early(void)
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{
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struct shared_info *s;
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BUG_ON(!xen_pv_domain());
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s = HYPERVISOR_shared_info;
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xen_start_info = __va(s->arch.start_info_pfn << PAGE_SHIFT);
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/* Must be done before any hypercall. */
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xencomm_initialize();
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xen_setup_features();
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/* Register a call for panic conditions. */
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atomic_notifier_chain_register(&panic_notifier_list,
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&xen_panic_block);
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pm_power_off = xen_pm_power_off;
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xen_ia64_enable_opt_feature();
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}
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static void __init
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xen_arch_setup_console(char **cmdline_p)
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{
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add_preferred_console("xenboot", 0, NULL);
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add_preferred_console("tty", 0, NULL);
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/* use hvc_xen */
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add_preferred_console("hvc", 0, NULL);
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#if !defined(CONFIG_VT) || !defined(CONFIG_DUMMY_CONSOLE)
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conswitchp = NULL;
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#endif
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}
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static int __init
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xen_arch_setup_nomca(void)
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{
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return 1;
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}
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static void __init
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xen_post_smp_prepare_boot_cpu(void)
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{
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xen_setup_vcpu_info_placement();
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}
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#ifdef ASM_SUPPORTED
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static unsigned long __init_or_module
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xen_patch_bundle(void *sbundle, void *ebundle, unsigned long type);
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#endif
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static void __init
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xen_patch_branch(unsigned long tag, unsigned long type);
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static const struct pv_init_ops xen_init_ops __initconst = {
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.banner = xen_banner,
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.reserve_memory = xen_reserve_memory,
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.arch_setup_early = xen_arch_setup_early,
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.arch_setup_console = xen_arch_setup_console,
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.arch_setup_nomca = xen_arch_setup_nomca,
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.post_smp_prepare_boot_cpu = xen_post_smp_prepare_boot_cpu,
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#ifdef ASM_SUPPORTED
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.patch_bundle = xen_patch_bundle,
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#endif
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.patch_branch = xen_patch_branch,
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};
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/***************************************************************************
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* pv_fsys_data
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* addresses for fsys
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*/
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extern unsigned long xen_fsyscall_table[NR_syscalls];
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extern char xen_fsys_bubble_down[];
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struct pv_fsys_data xen_fsys_data __initdata = {
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.fsyscall_table = (unsigned long *)xen_fsyscall_table,
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.fsys_bubble_down = (void *)xen_fsys_bubble_down,
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};
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/***************************************************************************
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* pv_patchdata
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* patchdata addresses
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*/
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#define DECLARE(name) \
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extern unsigned long __xen_start_gate_##name##_patchlist[]; \
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extern unsigned long __xen_end_gate_##name##_patchlist[]
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DECLARE(fsyscall);
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DECLARE(brl_fsys_bubble_down);
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DECLARE(vtop);
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DECLARE(mckinley_e9);
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extern unsigned long __xen_start_gate_section[];
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#define ASSIGN(name) \
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.start_##name##_patchlist = \
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(unsigned long)__xen_start_gate_##name##_patchlist, \
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.end_##name##_patchlist = \
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(unsigned long)__xen_end_gate_##name##_patchlist
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static struct pv_patchdata xen_patchdata __initdata = {
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ASSIGN(fsyscall),
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ASSIGN(brl_fsys_bubble_down),
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ASSIGN(vtop),
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ASSIGN(mckinley_e9),
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.gate_section = (void*)__xen_start_gate_section,
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};
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/***************************************************************************
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* pv_cpu_ops
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* intrinsics hooks.
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*/
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#ifndef ASM_SUPPORTED
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static void
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xen_set_itm_with_offset(unsigned long val)
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{
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/* ia64_cpu_local_tick() calls this with interrupt enabled. */
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/* WARN_ON(!irqs_disabled()); */
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xen_set_itm(val - XEN_MAPPEDREGS->itc_offset);
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}
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static unsigned long
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xen_get_itm_with_offset(void)
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{
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/* unused at this moment */
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printk(KERN_DEBUG "%s is called.\n", __func__);
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WARN_ON(!irqs_disabled());
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return ia64_native_getreg(_IA64_REG_CR_ITM) +
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XEN_MAPPEDREGS->itc_offset;
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}
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/* ia64_set_itc() is only called by
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* cpu_init() with ia64_set_itc(0) and ia64_sync_itc().
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* So XEN_MAPPEDRESG->itc_offset cal be considered as almost constant.
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*/
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static void
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xen_set_itc(unsigned long val)
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{
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unsigned long mitc;
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WARN_ON(!irqs_disabled());
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mitc = ia64_native_getreg(_IA64_REG_AR_ITC);
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XEN_MAPPEDREGS->itc_offset = val - mitc;
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XEN_MAPPEDREGS->itc_last = val;
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}
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static unsigned long
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xen_get_itc(void)
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{
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unsigned long res;
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unsigned long itc_offset;
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unsigned long itc_last;
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unsigned long ret_itc_last;
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itc_offset = XEN_MAPPEDREGS->itc_offset;
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do {
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itc_last = XEN_MAPPEDREGS->itc_last;
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res = ia64_native_getreg(_IA64_REG_AR_ITC);
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res += itc_offset;
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if (itc_last >= res)
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res = itc_last + 1;
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ret_itc_last = cmpxchg(&XEN_MAPPEDREGS->itc_last,
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itc_last, res);
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} while (unlikely(ret_itc_last != itc_last));
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return res;
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#if 0
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/* ia64_itc_udelay() calls ia64_get_itc() with interrupt enabled.
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Should it be paravirtualized instead? */
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WARN_ON(!irqs_disabled());
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itc_offset = XEN_MAPPEDREGS->itc_offset;
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itc_last = XEN_MAPPEDREGS->itc_last;
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res = ia64_native_getreg(_IA64_REG_AR_ITC);
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res += itc_offset;
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if (itc_last >= res)
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res = itc_last + 1;
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XEN_MAPPEDREGS->itc_last = res;
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return res;
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#endif
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}
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static void xen_setreg(int regnum, unsigned long val)
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{
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switch (regnum) {
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case _IA64_REG_AR_KR0 ... _IA64_REG_AR_KR7:
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xen_set_kr(regnum - _IA64_REG_AR_KR0, val);
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break;
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#ifdef CONFIG_IA32_SUPPORT
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case _IA64_REG_AR_EFLAG:
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xen_set_eflag(val);
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break;
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#endif
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case _IA64_REG_AR_ITC:
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xen_set_itc(val);
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break;
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case _IA64_REG_CR_TPR:
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xen_set_tpr(val);
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break;
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case _IA64_REG_CR_ITM:
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xen_set_itm_with_offset(val);
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break;
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case _IA64_REG_CR_EOI:
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xen_eoi(val);
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break;
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default:
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ia64_native_setreg_func(regnum, val);
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break;
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}
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}
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static unsigned long xen_getreg(int regnum)
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{
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unsigned long res;
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switch (regnum) {
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case _IA64_REG_PSR:
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res = xen_get_psr();
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break;
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#ifdef CONFIG_IA32_SUPPORT
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case _IA64_REG_AR_EFLAG:
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res = xen_get_eflag();
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break;
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#endif
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case _IA64_REG_AR_ITC:
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res = xen_get_itc();
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break;
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case _IA64_REG_CR_ITM:
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res = xen_get_itm_with_offset();
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break;
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case _IA64_REG_CR_IVR:
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res = xen_get_ivr();
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break;
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case _IA64_REG_CR_TPR:
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res = xen_get_tpr();
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break;
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default:
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res = ia64_native_getreg_func(regnum);
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break;
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}
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return res;
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}
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/* turning on interrupts is a bit more complicated.. write to the
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* memory-mapped virtual psr.i bit first (to avoid race condition),
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* then if any interrupts were pending, we have to execute a hyperprivop
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* to ensure the pending interrupt gets delivered; else we're done! */
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static void
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xen_ssm_i(void)
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{
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int old = xen_get_virtual_psr_i();
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xen_set_virtual_psr_i(1);
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barrier();
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if (!old && xen_get_virtual_pend())
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xen_hyper_ssm_i();
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}
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/* turning off interrupts can be paravirtualized simply by writing
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* to a memory-mapped virtual psr.i bit (implemented as a 16-bit bool) */
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static void
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xen_rsm_i(void)
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{
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xen_set_virtual_psr_i(0);
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barrier();
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}
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static unsigned long
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xen_get_psr_i(void)
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{
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return xen_get_virtual_psr_i() ? IA64_PSR_I : 0;
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}
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static void
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xen_intrin_local_irq_restore(unsigned long mask)
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{
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if (mask & IA64_PSR_I)
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xen_ssm_i();
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else
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xen_rsm_i();
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}
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#else
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#define __DEFINE_FUNC(name, code) \
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extern const char xen_ ## name ## _direct_start[]; \
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extern const char xen_ ## name ## _direct_end[]; \
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asm (".align 32\n" \
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".proc xen_" #name "\n" \
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"xen_" #name ":\n" \
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"xen_" #name "_direct_start:\n" \
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code \
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"xen_" #name "_direct_end:\n" \
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"br.cond.sptk.many b6\n" \
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".endp xen_" #name "\n")
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#define DEFINE_VOID_FUNC0(name, code) \
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extern void \
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xen_ ## name (void); \
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__DEFINE_FUNC(name, code)
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#define DEFINE_VOID_FUNC1(name, code) \
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extern void \
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xen_ ## name (unsigned long arg); \
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__DEFINE_FUNC(name, code)
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#define DEFINE_VOID_FUNC1_VOID(name, code) \
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extern void \
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xen_ ## name (void *arg); \
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__DEFINE_FUNC(name, code)
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#define DEFINE_VOID_FUNC2(name, code) \
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extern void \
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xen_ ## name (unsigned long arg0, \
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unsigned long arg1); \
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__DEFINE_FUNC(name, code)
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#define DEFINE_FUNC0(name, code) \
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extern unsigned long \
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xen_ ## name (void); \
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__DEFINE_FUNC(name, code)
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#define DEFINE_FUNC1(name, type, code) \
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extern unsigned long \
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xen_ ## name (type arg); \
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__DEFINE_FUNC(name, code)
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#define XEN_PSR_I_ADDR_ADDR (XSI_BASE + XSI_PSR_I_ADDR_OFS)
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/*
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* static void xen_set_itm_with_offset(unsigned long val)
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* xen_set_itm(val - XEN_MAPPEDREGS->itc_offset);
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*/
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/* 2 bundles */
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DEFINE_VOID_FUNC1(set_itm_with_offset,
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"mov r2 = " __stringify(XSI_BASE) " + "
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__stringify(XSI_ITC_OFFSET_OFS) "\n"
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";;\n"
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"ld8 r3 = [r2]\n"
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";;\n"
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"sub r8 = r8, r3\n"
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"break " __stringify(HYPERPRIVOP_SET_ITM) "\n");
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/*
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* static unsigned long xen_get_itm_with_offset(void)
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* return ia64_native_getreg(_IA64_REG_CR_ITM) + XEN_MAPPEDREGS->itc_offset;
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*/
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/* 2 bundles */
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DEFINE_FUNC0(get_itm_with_offset,
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"mov r2 = " __stringify(XSI_BASE) " + "
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__stringify(XSI_ITC_OFFSET_OFS) "\n"
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";;\n"
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"ld8 r3 = [r2]\n"
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"mov r8 = cr.itm\n"
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";;\n"
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"add r8 = r8, r2\n");
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/*
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* static void xen_set_itc(unsigned long val)
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* unsigned long mitc;
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*
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* WARN_ON(!irqs_disabled());
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* mitc = ia64_native_getreg(_IA64_REG_AR_ITC);
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* XEN_MAPPEDREGS->itc_offset = val - mitc;
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* XEN_MAPPEDREGS->itc_last = val;
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*/
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/* 2 bundles */
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DEFINE_VOID_FUNC1(set_itc,
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"mov r2 = " __stringify(XSI_BASE) " + "
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__stringify(XSI_ITC_LAST_OFS) "\n"
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"mov r3 = ar.itc\n"
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";;\n"
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"sub r3 = r8, r3\n"
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"st8 [r2] = r8, "
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__stringify(XSI_ITC_LAST_OFS) " - "
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__stringify(XSI_ITC_OFFSET_OFS) "\n"
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";;\n"
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"st8 [r2] = r3\n");
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|
/*
|
|
* static unsigned long xen_get_itc(void)
|
|
* unsigned long res;
|
|
* unsigned long itc_offset;
|
|
* unsigned long itc_last;
|
|
* unsigned long ret_itc_last;
|
|
*
|
|
* itc_offset = XEN_MAPPEDREGS->itc_offset;
|
|
* do {
|
|
* itc_last = XEN_MAPPEDREGS->itc_last;
|
|
* res = ia64_native_getreg(_IA64_REG_AR_ITC);
|
|
* res += itc_offset;
|
|
* if (itc_last >= res)
|
|
* res = itc_last + 1;
|
|
* ret_itc_last = cmpxchg(&XEN_MAPPEDREGS->itc_last,
|
|
* itc_last, res);
|
|
* } while (unlikely(ret_itc_last != itc_last));
|
|
* return res;
|
|
*/
|
|
/* 5 bundles */
|
|
DEFINE_FUNC0(get_itc,
|
|
"mov r2 = " __stringify(XSI_BASE) " + "
|
|
__stringify(XSI_ITC_OFFSET_OFS) "\n"
|
|
";;\n"
|
|
"ld8 r9 = [r2], " __stringify(XSI_ITC_LAST_OFS) " - "
|
|
__stringify(XSI_ITC_OFFSET_OFS) "\n"
|
|
/* r9 = itc_offset */
|
|
/* r2 = XSI_ITC_OFFSET */
|
|
"888:\n"
|
|
"mov r8 = ar.itc\n" /* res = ar.itc */
|
|
";;\n"
|
|
"ld8 r3 = [r2]\n" /* r3 = itc_last */
|
|
"add r8 = r8, r9\n" /* res = ar.itc + itc_offset */
|
|
";;\n"
|
|
"cmp.gtu p6, p0 = r3, r8\n"
|
|
";;\n"
|
|
"(p6) add r8 = 1, r3\n" /* if (itc_last > res) itc_last + 1 */
|
|
";;\n"
|
|
"mov ar.ccv = r8\n"
|
|
";;\n"
|
|
"cmpxchg8.acq r10 = [r2], r8, ar.ccv\n"
|
|
";;\n"
|
|
"cmp.ne p6, p0 = r10, r3\n"
|
|
"(p6) hint @pause\n"
|
|
"(p6) br.cond.spnt 888b\n");
|
|
|
|
DEFINE_VOID_FUNC1_VOID(fc,
|
|
"break " __stringify(HYPERPRIVOP_FC) "\n");
|
|
|
|
/*
|
|
* psr_i_addr_addr = XEN_PSR_I_ADDR_ADDR
|
|
* masked_addr = *psr_i_addr_addr
|
|
* pending_intr_addr = masked_addr - 1
|
|
* if (val & IA64_PSR_I) {
|
|
* masked = *masked_addr
|
|
* *masked_addr = 0:xen_set_virtual_psr_i(1)
|
|
* compiler barrier
|
|
* if (masked) {
|
|
* uint8_t pending = *pending_intr_addr;
|
|
* if (pending)
|
|
* XEN_HYPER_SSM_I
|
|
* }
|
|
* } else {
|
|
* *masked_addr = 1:xen_set_virtual_psr_i(0)
|
|
* }
|
|
*/
|
|
/* 6 bundles */
|
|
DEFINE_VOID_FUNC1(intrin_local_irq_restore,
|
|
/* r8 = input value: 0 or IA64_PSR_I
|
|
* p6 = (flags & IA64_PSR_I)
|
|
* = if clause
|
|
* p7 = !(flags & IA64_PSR_I)
|
|
* = else clause
|
|
*/
|
|
"cmp.ne p6, p7 = r8, r0\n"
|
|
"mov r9 = " __stringify(XEN_PSR_I_ADDR_ADDR) "\n"
|
|
";;\n"
|
|
/* r9 = XEN_PSR_I_ADDR */
|
|
"ld8 r9 = [r9]\n"
|
|
";;\n"
|
|
|
|
/* r10 = masked previous value */
|
|
"(p6) ld1.acq r10 = [r9]\n"
|
|
";;\n"
|
|
|
|
/* p8 = !masked interrupt masked previously? */
|
|
"(p6) cmp.ne.unc p8, p0 = r10, r0\n"
|
|
|
|
/* p7 = else clause */
|
|
"(p7) mov r11 = 1\n"
|
|
";;\n"
|
|
/* masked = 1 */
|
|
"(p7) st1.rel [r9] = r11\n"
|
|
|
|
/* p6 = if clause */
|
|
/* masked = 0
|
|
* r9 = masked_addr - 1
|
|
* = pending_intr_addr
|
|
*/
|
|
"(p8) st1.rel [r9] = r0, -1\n"
|
|
";;\n"
|
|
/* r8 = pending_intr */
|
|
"(p8) ld1.acq r11 = [r9]\n"
|
|
";;\n"
|
|
/* p9 = interrupt pending? */
|
|
"(p8) cmp.ne.unc p9, p10 = r11, r0\n"
|
|
";;\n"
|
|
"(p10) mf\n"
|
|
/* issue hypercall to trigger interrupt */
|
|
"(p9) break " __stringify(HYPERPRIVOP_SSM_I) "\n");
|
|
|
|
DEFINE_VOID_FUNC2(ptcga,
|
|
"break " __stringify(HYPERPRIVOP_PTC_GA) "\n");
|
|
DEFINE_VOID_FUNC2(set_rr,
|
|
"break " __stringify(HYPERPRIVOP_SET_RR) "\n");
|
|
|
|
/*
|
|
* tmp = XEN_MAPPEDREGS->interrupt_mask_addr = XEN_PSR_I_ADDR_ADDR;
|
|
* tmp = *tmp
|
|
* tmp = *tmp;
|
|
* psr_i = tmp? 0: IA64_PSR_I;
|
|
*/
|
|
/* 4 bundles */
|
|
DEFINE_FUNC0(get_psr_i,
|
|
"mov r9 = " __stringify(XEN_PSR_I_ADDR_ADDR) "\n"
|
|
";;\n"
|
|
"ld8 r9 = [r9]\n" /* r9 = XEN_PSR_I_ADDR */
|
|
"mov r8 = 0\n" /* psr_i = 0 */
|
|
";;\n"
|
|
"ld1.acq r9 = [r9]\n" /* r9 = XEN_PSR_I */
|
|
";;\n"
|
|
"cmp.eq.unc p6, p0 = r9, r0\n" /* p6 = (XEN_PSR_I != 0) */
|
|
";;\n"
|
|
"(p6) mov r8 = " __stringify(1 << IA64_PSR_I_BIT) "\n");
|
|
|
|
DEFINE_FUNC1(thash, unsigned long,
|
|
"break " __stringify(HYPERPRIVOP_THASH) "\n");
|
|
DEFINE_FUNC1(get_cpuid, int,
|
|
"break " __stringify(HYPERPRIVOP_GET_CPUID) "\n");
|
|
DEFINE_FUNC1(get_pmd, int,
|
|
"break " __stringify(HYPERPRIVOP_GET_PMD) "\n");
|
|
DEFINE_FUNC1(get_rr, unsigned long,
|
|
"break " __stringify(HYPERPRIVOP_GET_RR) "\n");
|
|
|
|
/*
|
|
* void xen_privop_ssm_i(void)
|
|
*
|
|
* int masked = !xen_get_virtual_psr_i();
|
|
* // masked = *(*XEN_MAPPEDREGS->interrupt_mask_addr)
|
|
* xen_set_virtual_psr_i(1)
|
|
* // *(*XEN_MAPPEDREGS->interrupt_mask_addr) = 0
|
|
* // compiler barrier
|
|
* if (masked) {
|
|
* uint8_t* pend_int_addr =
|
|
* (uint8_t*)(*XEN_MAPPEDREGS->interrupt_mask_addr) - 1;
|
|
* uint8_t pending = *pend_int_addr;
|
|
* if (pending)
|
|
* XEN_HYPER_SSM_I
|
|
* }
|
|
*/
|
|
/* 4 bundles */
|
|
DEFINE_VOID_FUNC0(ssm_i,
|
|
"mov r8 = " __stringify(XEN_PSR_I_ADDR_ADDR) "\n"
|
|
";;\n"
|
|
"ld8 r8 = [r8]\n" /* r8 = XEN_PSR_I_ADDR */
|
|
";;\n"
|
|
"ld1.acq r9 = [r8]\n" /* r9 = XEN_PSR_I */
|
|
";;\n"
|
|
"st1.rel [r8] = r0, -1\n" /* psr_i = 0. enable interrupt
|
|
* r8 = XEN_PSR_I_ADDR - 1
|
|
* = pend_int_addr
|
|
*/
|
|
"cmp.eq.unc p0, p6 = r9, r0\n"/* p6 = !XEN_PSR_I
|
|
* previously interrupt
|
|
* masked?
|
|
*/
|
|
";;\n"
|
|
"(p6) ld1.acq r8 = [r8]\n" /* r8 = xen_pend_int */
|
|
";;\n"
|
|
"(p6) cmp.eq.unc p6, p7 = r8, r0\n" /*interrupt pending?*/
|
|
";;\n"
|
|
/* issue hypercall to get interrupt */
|
|
"(p7) break " __stringify(HYPERPRIVOP_SSM_I) "\n"
|
|
";;\n");
|
|
|
|
/*
|
|
* psr_i_addr_addr = XEN_MAPPEDREGS->interrupt_mask_addr
|
|
* = XEN_PSR_I_ADDR_ADDR;
|
|
* psr_i_addr = *psr_i_addr_addr;
|
|
* *psr_i_addr = 1;
|
|
*/
|
|
/* 2 bundles */
|
|
DEFINE_VOID_FUNC0(rsm_i,
|
|
"mov r8 = " __stringify(XEN_PSR_I_ADDR_ADDR) "\n"
|
|
/* r8 = XEN_PSR_I_ADDR */
|
|
"mov r9 = 1\n"
|
|
";;\n"
|
|
"ld8 r8 = [r8]\n" /* r8 = XEN_PSR_I */
|
|
";;\n"
|
|
"st1.rel [r8] = r9\n"); /* XEN_PSR_I = 1 */
|
|
|
|
extern void
|
|
xen_set_rr0_to_rr4(unsigned long val0, unsigned long val1,
|
|
unsigned long val2, unsigned long val3,
|
|
unsigned long val4);
|
|
__DEFINE_FUNC(set_rr0_to_rr4,
|
|
"break " __stringify(HYPERPRIVOP_SET_RR0_TO_RR4) "\n");
|
|
|
|
|
|
extern unsigned long xen_getreg(int regnum);
|
|
#define __DEFINE_GET_REG(id, privop) \
|
|
"mov r2 = " __stringify(_IA64_REG_ ## id) "\n" \
|
|
";;\n" \
|
|
"cmp.eq p6, p0 = r2, r8\n" \
|
|
";;\n" \
|
|
"(p6) break " __stringify(HYPERPRIVOP_GET_ ## privop) "\n" \
|
|
"(p6) br.cond.sptk.many b6\n" \
|
|
";;\n"
|
|
|
|
__DEFINE_FUNC(getreg,
|
|
__DEFINE_GET_REG(PSR, PSR)
|
|
#ifdef CONFIG_IA32_SUPPORT
|
|
__DEFINE_GET_REG(AR_EFLAG, EFLAG)
|
|
#endif
|
|
|
|
/* get_itc */
|
|
"mov r2 = " __stringify(_IA64_REG_AR_ITC) "\n"
|
|
";;\n"
|
|
"cmp.eq p6, p0 = r2, r8\n"
|
|
";;\n"
|
|
"(p6) br.cond.spnt xen_get_itc\n"
|
|
";;\n"
|
|
|
|
/* get itm */
|
|
"mov r2 = " __stringify(_IA64_REG_CR_ITM) "\n"
|
|
";;\n"
|
|
"cmp.eq p6, p0 = r2, r8\n"
|
|
";;\n"
|
|
"(p6) br.cond.spnt xen_get_itm_with_offset\n"
|
|
";;\n"
|
|
|
|
__DEFINE_GET_REG(CR_IVR, IVR)
|
|
__DEFINE_GET_REG(CR_TPR, TPR)
|
|
|
|
/* fall back */
|
|
"movl r2 = ia64_native_getreg_func\n"
|
|
";;\n"
|
|
"mov b7 = r2\n"
|
|
";;\n"
|
|
"br.cond.sptk.many b7\n");
|
|
|
|
extern void xen_setreg(int regnum, unsigned long val);
|
|
#define __DEFINE_SET_REG(id, privop) \
|
|
"mov r2 = " __stringify(_IA64_REG_ ## id) "\n" \
|
|
";;\n" \
|
|
"cmp.eq p6, p0 = r2, r9\n" \
|
|
";;\n" \
|
|
"(p6) break " __stringify(HYPERPRIVOP_ ## privop) "\n" \
|
|
"(p6) br.cond.sptk.many b6\n" \
|
|
";;\n"
|
|
|
|
__DEFINE_FUNC(setreg,
|
|
/* kr0 .. kr 7*/
|
|
/*
|
|
* if (_IA64_REG_AR_KR0 <= regnum &&
|
|
* regnum <= _IA64_REG_AR_KR7) {
|
|
* register __index asm ("r8") = regnum - _IA64_REG_AR_KR0
|
|
* register __val asm ("r9") = val
|
|
* "break HYPERPRIVOP_SET_KR"
|
|
* }
|
|
*/
|
|
"mov r17 = r9\n"
|
|
"mov r2 = " __stringify(_IA64_REG_AR_KR0) "\n"
|
|
";;\n"
|
|
"cmp.ge p6, p0 = r9, r2\n"
|
|
"sub r17 = r17, r2\n"
|
|
";;\n"
|
|
"(p6) cmp.ge.unc p7, p0 = "
|
|
__stringify(_IA64_REG_AR_KR7) " - " __stringify(_IA64_REG_AR_KR0)
|
|
", r17\n"
|
|
";;\n"
|
|
"(p7) mov r9 = r8\n"
|
|
";;\n"
|
|
"(p7) mov r8 = r17\n"
|
|
"(p7) break " __stringify(HYPERPRIVOP_SET_KR) "\n"
|
|
|
|
/* set itm */
|
|
"mov r2 = " __stringify(_IA64_REG_CR_ITM) "\n"
|
|
";;\n"
|
|
"cmp.eq p6, p0 = r2, r8\n"
|
|
";;\n"
|
|
"(p6) br.cond.spnt xen_set_itm_with_offset\n"
|
|
|
|
/* set itc */
|
|
"mov r2 = " __stringify(_IA64_REG_AR_ITC) "\n"
|
|
";;\n"
|
|
"cmp.eq p6, p0 = r2, r8\n"
|
|
";;\n"
|
|
"(p6) br.cond.spnt xen_set_itc\n"
|
|
|
|
#ifdef CONFIG_IA32_SUPPORT
|
|
__DEFINE_SET_REG(AR_EFLAG, SET_EFLAG)
|
|
#endif
|
|
__DEFINE_SET_REG(CR_TPR, SET_TPR)
|
|
__DEFINE_SET_REG(CR_EOI, EOI)
|
|
|
|
/* fall back */
|
|
"movl r2 = ia64_native_setreg_func\n"
|
|
";;\n"
|
|
"mov b7 = r2\n"
|
|
";;\n"
|
|
"br.cond.sptk.many b7\n");
|
|
#endif
|
|
|
|
static const struct pv_cpu_ops xen_cpu_ops __initconst = {
|
|
.fc = xen_fc,
|
|
.thash = xen_thash,
|
|
.get_cpuid = xen_get_cpuid,
|
|
.get_pmd = xen_get_pmd,
|
|
.getreg = xen_getreg,
|
|
.setreg = xen_setreg,
|
|
.ptcga = xen_ptcga,
|
|
.get_rr = xen_get_rr,
|
|
.set_rr = xen_set_rr,
|
|
.set_rr0_to_rr4 = xen_set_rr0_to_rr4,
|
|
.ssm_i = xen_ssm_i,
|
|
.rsm_i = xen_rsm_i,
|
|
.get_psr_i = xen_get_psr_i,
|
|
.intrin_local_irq_restore
|
|
= xen_intrin_local_irq_restore,
|
|
};
|
|
|
|
/******************************************************************************
|
|
* replacement of hand written assembly codes.
|
|
*/
|
|
|
|
extern char xen_switch_to;
|
|
extern char xen_leave_syscall;
|
|
extern char xen_work_processed_syscall;
|
|
extern char xen_leave_kernel;
|
|
|
|
const struct pv_cpu_asm_switch xen_cpu_asm_switch = {
|
|
.switch_to = (unsigned long)&xen_switch_to,
|
|
.leave_syscall = (unsigned long)&xen_leave_syscall,
|
|
.work_processed_syscall = (unsigned long)&xen_work_processed_syscall,
|
|
.leave_kernel = (unsigned long)&xen_leave_kernel,
|
|
};
|
|
|
|
/***************************************************************************
|
|
* pv_iosapic_ops
|
|
* iosapic read/write hooks.
|
|
*/
|
|
static void
|
|
xen_pcat_compat_init(void)
|
|
{
|
|
/* nothing */
|
|
}
|
|
|
|
static struct irq_chip*
|
|
xen_iosapic_get_irq_chip(unsigned long trigger)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static unsigned int
|
|
xen_iosapic_read(char __iomem *iosapic, unsigned int reg)
|
|
{
|
|
struct physdev_apic apic_op;
|
|
int ret;
|
|
|
|
apic_op.apic_physbase = (unsigned long)iosapic -
|
|
__IA64_UNCACHED_OFFSET;
|
|
apic_op.reg = reg;
|
|
ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
|
|
if (ret)
|
|
return ret;
|
|
return apic_op.value;
|
|
}
|
|
|
|
static void
|
|
xen_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)
|
|
{
|
|
struct physdev_apic apic_op;
|
|
|
|
apic_op.apic_physbase = (unsigned long)iosapic -
|
|
__IA64_UNCACHED_OFFSET;
|
|
apic_op.reg = reg;
|
|
apic_op.value = val;
|
|
HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op);
|
|
}
|
|
|
|
static struct pv_iosapic_ops xen_iosapic_ops __initdata = {
|
|
.pcat_compat_init = xen_pcat_compat_init,
|
|
.__get_irq_chip = xen_iosapic_get_irq_chip,
|
|
|
|
.__read = xen_iosapic_read,
|
|
.__write = xen_iosapic_write,
|
|
};
|
|
|
|
/***************************************************************************
|
|
* pv_ops initialization
|
|
*/
|
|
|
|
void __init
|
|
xen_setup_pv_ops(void)
|
|
{
|
|
xen_info_init();
|
|
pv_info = xen_info;
|
|
pv_init_ops = xen_init_ops;
|
|
pv_fsys_data = xen_fsys_data;
|
|
pv_patchdata = xen_patchdata;
|
|
pv_cpu_ops = xen_cpu_ops;
|
|
pv_iosapic_ops = xen_iosapic_ops;
|
|
pv_irq_ops = xen_irq_ops;
|
|
pv_time_ops = xen_time_ops;
|
|
|
|
paravirt_cpu_asm_init(&xen_cpu_asm_switch);
|
|
}
|
|
|
|
#ifdef ASM_SUPPORTED
|
|
/***************************************************************************
|
|
* binary pacthing
|
|
* pv_init_ops.patch_bundle
|
|
*/
|
|
|
|
#define DEFINE_FUNC_GETREG(name, privop) \
|
|
DEFINE_FUNC0(get_ ## name, \
|
|
"break "__stringify(HYPERPRIVOP_GET_ ## privop) "\n")
|
|
|
|
DEFINE_FUNC_GETREG(psr, PSR);
|
|
DEFINE_FUNC_GETREG(eflag, EFLAG);
|
|
DEFINE_FUNC_GETREG(ivr, IVR);
|
|
DEFINE_FUNC_GETREG(tpr, TPR);
|
|
|
|
#define DEFINE_FUNC_SET_KR(n) \
|
|
DEFINE_VOID_FUNC0(set_kr ## n, \
|
|
";;\n" \
|
|
"mov r9 = r8\n" \
|
|
"mov r8 = " #n "\n" \
|
|
"break " __stringify(HYPERPRIVOP_SET_KR) "\n")
|
|
|
|
DEFINE_FUNC_SET_KR(0);
|
|
DEFINE_FUNC_SET_KR(1);
|
|
DEFINE_FUNC_SET_KR(2);
|
|
DEFINE_FUNC_SET_KR(3);
|
|
DEFINE_FUNC_SET_KR(4);
|
|
DEFINE_FUNC_SET_KR(5);
|
|
DEFINE_FUNC_SET_KR(6);
|
|
DEFINE_FUNC_SET_KR(7);
|
|
|
|
#define __DEFINE_FUNC_SETREG(name, privop) \
|
|
DEFINE_VOID_FUNC0(name, \
|
|
"break "__stringify(HYPERPRIVOP_ ## privop) "\n")
|
|
|
|
#define DEFINE_FUNC_SETREG(name, privop) \
|
|
__DEFINE_FUNC_SETREG(set_ ## name, SET_ ## privop)
|
|
|
|
DEFINE_FUNC_SETREG(eflag, EFLAG);
|
|
DEFINE_FUNC_SETREG(tpr, TPR);
|
|
__DEFINE_FUNC_SETREG(eoi, EOI);
|
|
|
|
extern const char xen_check_events[];
|
|
extern const char __xen_intrin_local_irq_restore_direct_start[];
|
|
extern const char __xen_intrin_local_irq_restore_direct_end[];
|
|
extern const unsigned long __xen_intrin_local_irq_restore_direct_reloc;
|
|
|
|
asm (
|
|
".align 32\n"
|
|
".proc xen_check_events\n"
|
|
"xen_check_events:\n"
|
|
/* masked = 0
|
|
* r9 = masked_addr - 1
|
|
* = pending_intr_addr
|
|
*/
|
|
"st1.rel [r9] = r0, -1\n"
|
|
";;\n"
|
|
/* r8 = pending_intr */
|
|
"ld1.acq r11 = [r9]\n"
|
|
";;\n"
|
|
/* p9 = interrupt pending? */
|
|
"cmp.ne p9, p10 = r11, r0\n"
|
|
";;\n"
|
|
"(p10) mf\n"
|
|
/* issue hypercall to trigger interrupt */
|
|
"(p9) break " __stringify(HYPERPRIVOP_SSM_I) "\n"
|
|
"br.cond.sptk.many b6\n"
|
|
".endp xen_check_events\n"
|
|
"\n"
|
|
".align 32\n"
|
|
".proc __xen_intrin_local_irq_restore_direct\n"
|
|
"__xen_intrin_local_irq_restore_direct:\n"
|
|
"__xen_intrin_local_irq_restore_direct_start:\n"
|
|
"1:\n"
|
|
"{\n"
|
|
"cmp.ne p6, p7 = r8, r0\n"
|
|
"mov r17 = ip\n" /* get ip to calc return address */
|
|
"mov r9 = "__stringify(XEN_PSR_I_ADDR_ADDR) "\n"
|
|
";;\n"
|
|
"}\n"
|
|
"{\n"
|
|
/* r9 = XEN_PSR_I_ADDR */
|
|
"ld8 r9 = [r9]\n"
|
|
";;\n"
|
|
/* r10 = masked previous value */
|
|
"(p6) ld1.acq r10 = [r9]\n"
|
|
"adds r17 = 1f - 1b, r17\n" /* calculate return address */
|
|
";;\n"
|
|
"}\n"
|
|
"{\n"
|
|
/* p8 = !masked interrupt masked previously? */
|
|
"(p6) cmp.ne.unc p8, p0 = r10, r0\n"
|
|
"\n"
|
|
/* p7 = else clause */
|
|
"(p7) mov r11 = 1\n"
|
|
";;\n"
|
|
"(p8) mov b6 = r17\n" /* set return address */
|
|
"}\n"
|
|
"{\n"
|
|
/* masked = 1 */
|
|
"(p7) st1.rel [r9] = r11\n"
|
|
"\n"
|
|
"[99:]\n"
|
|
"(p8) brl.cond.dptk.few xen_check_events\n"
|
|
"}\n"
|
|
/* pv calling stub is 5 bundles. fill nop to adjust return address */
|
|
"{\n"
|
|
"nop 0\n"
|
|
"nop 0\n"
|
|
"nop 0\n"
|
|
"}\n"
|
|
"1:\n"
|
|
"__xen_intrin_local_irq_restore_direct_end:\n"
|
|
".endp __xen_intrin_local_irq_restore_direct\n"
|
|
"\n"
|
|
".align 8\n"
|
|
"__xen_intrin_local_irq_restore_direct_reloc:\n"
|
|
"data8 99b\n"
|
|
);
|
|
|
|
static struct paravirt_patch_bundle_elem xen_patch_bundle_elems[]
|
|
__initdata_or_module =
|
|
{
|
|
#define XEN_PATCH_BUNDLE_ELEM(name, type) \
|
|
{ \
|
|
(void*)xen_ ## name ## _direct_start, \
|
|
(void*)xen_ ## name ## _direct_end, \
|
|
PARAVIRT_PATCH_TYPE_ ## type, \
|
|
}
|
|
|
|
XEN_PATCH_BUNDLE_ELEM(fc, FC),
|
|
XEN_PATCH_BUNDLE_ELEM(thash, THASH),
|
|
XEN_PATCH_BUNDLE_ELEM(get_cpuid, GET_CPUID),
|
|
XEN_PATCH_BUNDLE_ELEM(get_pmd, GET_PMD),
|
|
XEN_PATCH_BUNDLE_ELEM(ptcga, PTCGA),
|
|
XEN_PATCH_BUNDLE_ELEM(get_rr, GET_RR),
|
|
XEN_PATCH_BUNDLE_ELEM(set_rr, SET_RR),
|
|
XEN_PATCH_BUNDLE_ELEM(set_rr0_to_rr4, SET_RR0_TO_RR4),
|
|
XEN_PATCH_BUNDLE_ELEM(ssm_i, SSM_I),
|
|
XEN_PATCH_BUNDLE_ELEM(rsm_i, RSM_I),
|
|
XEN_PATCH_BUNDLE_ELEM(get_psr_i, GET_PSR_I),
|
|
{
|
|
(void*)__xen_intrin_local_irq_restore_direct_start,
|
|
(void*)__xen_intrin_local_irq_restore_direct_end,
|
|
PARAVIRT_PATCH_TYPE_INTRIN_LOCAL_IRQ_RESTORE,
|
|
},
|
|
|
|
#define XEN_PATCH_BUNDLE_ELEM_GETREG(name, reg) \
|
|
{ \
|
|
xen_get_ ## name ## _direct_start, \
|
|
xen_get_ ## name ## _direct_end, \
|
|
PARAVIRT_PATCH_TYPE_GETREG + _IA64_REG_ ## reg, \
|
|
}
|
|
|
|
XEN_PATCH_BUNDLE_ELEM_GETREG(psr, PSR),
|
|
XEN_PATCH_BUNDLE_ELEM_GETREG(eflag, AR_EFLAG),
|
|
|
|
XEN_PATCH_BUNDLE_ELEM_GETREG(ivr, CR_IVR),
|
|
XEN_PATCH_BUNDLE_ELEM_GETREG(tpr, CR_TPR),
|
|
|
|
XEN_PATCH_BUNDLE_ELEM_GETREG(itc, AR_ITC),
|
|
XEN_PATCH_BUNDLE_ELEM_GETREG(itm_with_offset, CR_ITM),
|
|
|
|
|
|
#define __XEN_PATCH_BUNDLE_ELEM_SETREG(name, reg) \
|
|
{ \
|
|
xen_ ## name ## _direct_start, \
|
|
xen_ ## name ## _direct_end, \
|
|
PARAVIRT_PATCH_TYPE_SETREG + _IA64_REG_ ## reg, \
|
|
}
|
|
|
|
#define XEN_PATCH_BUNDLE_ELEM_SETREG(name, reg) \
|
|
__XEN_PATCH_BUNDLE_ELEM_SETREG(set_ ## name, reg)
|
|
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(kr0, AR_KR0),
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(kr1, AR_KR1),
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(kr2, AR_KR2),
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(kr3, AR_KR3),
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(kr4, AR_KR4),
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(kr5, AR_KR5),
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(kr6, AR_KR6),
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(kr7, AR_KR7),
|
|
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(eflag, AR_EFLAG),
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(tpr, CR_TPR),
|
|
__XEN_PATCH_BUNDLE_ELEM_SETREG(eoi, CR_EOI),
|
|
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(itc, AR_ITC),
|
|
XEN_PATCH_BUNDLE_ELEM_SETREG(itm_with_offset, CR_ITM),
|
|
};
|
|
|
|
static unsigned long __init_or_module
|
|
xen_patch_bundle(void *sbundle, void *ebundle, unsigned long type)
|
|
{
|
|
const unsigned long nelems = sizeof(xen_patch_bundle_elems) /
|
|
sizeof(xen_patch_bundle_elems[0]);
|
|
unsigned long used;
|
|
const struct paravirt_patch_bundle_elem *found;
|
|
|
|
used = __paravirt_patch_apply_bundle(sbundle, ebundle, type,
|
|
xen_patch_bundle_elems, nelems,
|
|
&found);
|
|
|
|
if (found == NULL)
|
|
/* fallback */
|
|
return ia64_native_patch_bundle(sbundle, ebundle, type);
|
|
if (used == 0)
|
|
return used;
|
|
|
|
/* relocation */
|
|
switch (type) {
|
|
case PARAVIRT_PATCH_TYPE_INTRIN_LOCAL_IRQ_RESTORE: {
|
|
unsigned long reloc =
|
|
__xen_intrin_local_irq_restore_direct_reloc;
|
|
unsigned long reloc_offset = reloc - (unsigned long)
|
|
__xen_intrin_local_irq_restore_direct_start;
|
|
unsigned long tag = (unsigned long)sbundle + reloc_offset;
|
|
paravirt_patch_reloc_brl(tag, xen_check_events);
|
|
break;
|
|
}
|
|
default:
|
|
/* nothing */
|
|
break;
|
|
}
|
|
return used;
|
|
}
|
|
#endif /* ASM_SUPPOTED */
|
|
|
|
const struct paravirt_patch_branch_target xen_branch_target[]
|
|
__initconst = {
|
|
#define PARAVIRT_BR_TARGET(name, type) \
|
|
{ \
|
|
&xen_ ## name, \
|
|
PARAVIRT_PATCH_TYPE_BR_ ## type, \
|
|
}
|
|
PARAVIRT_BR_TARGET(switch_to, SWITCH_TO),
|
|
PARAVIRT_BR_TARGET(leave_syscall, LEAVE_SYSCALL),
|
|
PARAVIRT_BR_TARGET(work_processed_syscall, WORK_PROCESSED_SYSCALL),
|
|
PARAVIRT_BR_TARGET(leave_kernel, LEAVE_KERNEL),
|
|
};
|
|
|
|
static void __init
|
|
xen_patch_branch(unsigned long tag, unsigned long type)
|
|
{
|
|
const unsigned long nelem =
|
|
sizeof(xen_branch_target) / sizeof(xen_branch_target[0]);
|
|
__paravirt_patch_apply_branch(tag, type, xen_branch_target, nelem);
|
|
}
|