[PATCH] [16/48] Suspend2 2.1.9.8 for 2.6.12: 406-dynamic-pageflags.patch
From: Nigel Cunningham
Date: Tue Jul 05 2005 - 21:46:03 EST
diff -ruNp 500-version-specific-i386.patch-old/arch/i386/power/Makefile 500-version-specific-i386.patch-new/arch/i386/power/Makefile
--- 500-version-specific-i386.patch-old/arch/i386/power/Makefile 2004-11-03 21:52:57.000000000 +1100
+++ 500-version-specific-i386.patch-new/arch/i386/power/Makefile 2005-07-04 23:14:19.000000000 +1000
@@ -1,2 +1,2 @@
-obj-$(CONFIG_PM) += cpu.o
+obj-$(CONFIG_PM) += cpu.o smp.o
obj-$(CONFIG_SOFTWARE_SUSPEND) += swsusp.o
diff -ruNp 500-version-specific-i386.patch-old/arch/i386/power/smp.c 500-version-specific-i386.patch-new/arch/i386/power/smp.c
--- 500-version-specific-i386.patch-old/arch/i386/power/smp.c 1970-01-01 10:00:00.000000000 +1000
+++ 500-version-specific-i386.patch-new/arch/i386/power/smp.c 2005-07-04 23:14:19.000000000 +1000
@@ -0,0 +1,84 @@
+//#ifdef CONFIG_SMP
+#include <linux/suspend.h>
+#include <linux/irq.h>
+#include <asm/tlbflush.h>
+#include <asm/suspend2.h>
+
+extern atomic_t suspend_cpu_counter __nosavedata;
+unsigned char * my_saved_context __nosavedata;
+static unsigned long c_loops_per_jiffy_ref[NR_CPUS] __nosavedata;
+
+struct suspend2_saved_context suspend2_saved_contexts[NR_CPUS];
+struct suspend2_saved_context suspend2_saved_context; /* temporary storage */
+cpumask_t saved_affinity[NR_IRQS];
+
+/*
+ * Save and restore processor state for secondary processors.
+ * IRQs (and therefore preemption) are already disabled
+ * when we enter here (IPI).
+ */
+
+static volatile int loop __nosavedata;
+
+void __smp_suspend_lowlevel(void * data)
+{
+ __asm__( "movl %%ecx,%%cr3\n" ::"c"(__pa(swsusp_pg_dir)));
+
+ if (test_suspend_state(SUSPEND_NOW_RESUMING)) {
+ BUG_ON(!irqs_disabled());
+ kernel_fpu_begin();
+ c_loops_per_jiffy_ref[_smp_processor_id()] = current_cpu_data.loops_per_jiffy;
+ atomic_inc(&suspend_cpu_counter);
+
+ /* Only image copied back while we spin in this loop. Our
+ * task info should not be looked at while this is happening
+ * (which smp_processor_id() will do( */
+ while (test_suspend_state(SUSPEND_FREEZE_SMP)) {
+ cpu_relax();
+ barrier();
+ }
+
+ while (atomic_read(&suspend_cpu_counter) != _smp_processor_id()) {
+ cpu_relax();
+ barrier();
+ }
+ my_saved_context = (unsigned char *) (suspend2_saved_contexts + _smp_processor_id());
+ for (loop = sizeof(struct suspend2_saved_context); loop--; loop)
+ *(((unsigned char *) &suspend2_saved_context) + loop - 1) = *(my_saved_context + loop - 1);
+ suspend2_restore_processor_context();
+ cpu_clear(_smp_processor_id(), per_cpu(cpu_tlbstate, _smp_processor_id()).active_mm->cpu_vm_mask);
+ load_cr3(swapper_pg_dir);
+ wbinvd();
+ __flush_tlb_all();
+ current_cpu_data.loops_per_jiffy = c_loops_per_jiffy_ref[_smp_processor_id()];
+ mtrr_restore_one_cpu();
+ atomic_dec(&suspend_cpu_counter);
+ } else { /* suspending */
+ BUG_ON(!irqs_disabled());
+ /*
+ *Save context and go back to idling.
+ * Note that we cannot leave the processor
+ * here. It must be able to receive IPIs if
+ * the LZF compression driver (eg) does a
+ * vfree after compressing the kernel etc
+ */
+ while (test_suspend_state(SUSPEND_FREEZE_SMP) &&
+ (atomic_read(&suspend_cpu_counter) != (_smp_processor_id() - 1))) {
+ cpu_relax();
+ barrier();
+ }
+ suspend2_save_processor_context();
+ my_saved_context = (unsigned char *) (suspend2_saved_contexts + _smp_processor_id());
+ for (loop = sizeof(struct suspend2_saved_context); loop--; loop)
+ *(my_saved_context + loop - 1) = *(((unsigned char *) &suspend2_saved_context) + loop - 1);
+ atomic_inc(&suspend_cpu_counter);
+ /* Now spin until the atomic copy of the kernel is made. */
+ while (test_suspend_state(SUSPEND_FREEZE_SMP)) {
+ cpu_relax();
+ barrier();
+ }
+ atomic_dec(&suspend_cpu_counter);
+ kernel_fpu_end();
+ }
+}
+//#endif
diff -ruNp 500-version-specific-i386.patch-old/include/asm-i386/suspend2.h 500-version-specific-i386.patch-new/include/asm-i386/suspend2.h
--- 500-version-specific-i386.patch-old/include/asm-i386/suspend2.h 1970-01-01 10:00:00.000000000 +1000
+++ 500-version-specific-i386.patch-new/include/asm-i386/suspend2.h 2005-07-05 23:56:41.000000000 +1000
@@ -0,0 +1,391 @@
+ /*
+ * Copyright 2003-2005 Nigel Cunningham <nigel@xxxxxxxxxxxx>
+ * Based on code
+ * Copyright 2001-2002 Pavel Machek <pavel@xxxxxxx>
+ * Based on code
+ * Copyright 2001 Patrick Mochel <mochel@xxxxxxxx>
+ */
+#include <linux/irq.h>
+#include <asm/desc.h>
+#include <asm/i387.h>
+#include <asm/tlbflush.h>
+#include <asm/desc.h>
+#include <asm/suspend.h>
+#undef inline
+#define inline __inline__ __attribute__((always_inline))
+
+/* image of the saved processor states */
+struct suspend2_saved_context {
+ u32 eax, ebx, ecx, edx;
+ u32 esp, ebp, esi, edi;
+ u16 es, fs, gs, ss;
+ u32 cr0, cr2, cr3, cr4;
+ u16 gdt_pad;
+ u16 gdt_limit;
+ u32 gdt_base;
+ u16 idt_pad;
+ u16 idt_limit;
+ u32 idt_base;
+ u16 ldt;
+ u16 tss;
+ u32 tr;
+ u32 safety;
+ u32 return_address;
+ u32 eflags;
+} __attribute__((packed));
+
+extern struct suspend2_saved_context suspend2_saved_context; /* temporary storage */
+
+#ifdef CONFIG_MTRR
+/* MTRR functions */
+extern int mtrr_save(void);
+extern int mtrr_restore_one_cpu(void);
+extern void mtrr_restore_finish(void);
+#else
+#define mtrr_save() do { } while(0)
+#define mtrr_restore_one_cpu() do { } while(0)
+#define mtrr_restore_finish() do { } while(0)
+#endif
+
+#ifndef CONFIG_SMP
+#undef cpu_clear
+#define cpu_clear(a, b) do { } while(0)
+#endif
+
+extern struct suspend2_saved_context suspend2_saved_context; /* temporary storage */
+
+/*
+ * save_processor_context
+ *
+ * Save the state of the processor before we go to sleep.
+ *
+ * return_stack is the value of the stack pointer (%esp) as the caller sees it.
+ * A good way could not be found to obtain it from here (don't want to make _too_
+ * many assumptions about the layout of the stack this far down.) Also, the
+ * handy little __builtin_frame_pointer(level) where level > 0, is blatantly
+ * buggy - it returns the value of the stack at the proper location, not the
+ * location, like it should (as of gcc 2.91.66)
+ *
+ * Note that the context and timing of this function is pretty critical.
+ * With a minimal amount of things going on in the caller and in here, gcc
+ * does a good job of being just a dumb compiler. Watch the assembly output
+ * if anything changes, though, and make sure everything is going in the right
+ * place.
+ */
+static inline void suspend2_save_processor_context(void)
+{
+ kernel_fpu_begin();
+
+ /*
+ * descriptor tables
+ */
+ asm volatile ("sgdt (%0)" : "=m" (suspend2_saved_context.gdt_limit));
+ asm volatile ("sidt (%0)" : "=m" (suspend2_saved_context.idt_limit));
+ asm volatile ("sldt (%0)" : "=m" (suspend2_saved_context.ldt));
+ asm volatile ("str (%0)" : "=m" (suspend2_saved_context.tr));
+
+ /*
+ * save the general registers.
+ * note that gcc has constructs to specify output of certain registers,
+ * but they're not used here, because it assumes that you want to modify
+ * those registers, so it tries to be smart and save them beforehand.
+ * It's really not necessary, and kinda fishy (check the assembly output),
+ * so it's avoided.
+ */
+ asm volatile ("movl %%esp, (%0)" : "=m" (suspend2_saved_context.esp));
+ asm volatile ("movl %%eax, (%0)" : "=m" (suspend2_saved_context.eax));
+ asm volatile ("movl %%ebx, (%0)" : "=m" (suspend2_saved_context.ebx));
+ asm volatile ("movl %%ecx, (%0)" : "=m" (suspend2_saved_context.ecx));
+ asm volatile ("movl %%edx, (%0)" : "=m" (suspend2_saved_context.edx));
+ asm volatile ("movl %%ebp, (%0)" : "=m" (suspend2_saved_context.ebp));
+ asm volatile ("movl %%esi, (%0)" : "=m" (suspend2_saved_context.esi));
+ asm volatile ("movl %%edi, (%0)" : "=m" (suspend2_saved_context.edi));
+
+ /*
+ * segment registers
+ */
+ asm volatile ("movw %%es, %0" : "=r" (suspend2_saved_context.es));
+ asm volatile ("movw %%fs, %0" : "=r" (suspend2_saved_context.fs));
+ asm volatile ("movw %%gs, %0" : "=r" (suspend2_saved_context.gs));
+ asm volatile ("movw %%ss, %0" : "=r" (suspend2_saved_context.ss));
+
+ /*
+ * control registers
+ */
+ asm volatile ("movl %%cr0, %0" : "=r" (suspend2_saved_context.cr0));
+ asm volatile ("movl %%cr2, %0" : "=r" (suspend2_saved_context.cr2));
+ asm volatile ("movl %%cr3, %0" : "=r" (suspend2_saved_context.cr3));
+ asm volatile ("movl %%cr4, %0" : "=r" (suspend2_saved_context.cr4));
+
+ /*
+ * eflags
+ */
+ asm volatile ("pushfl ; popl (%0)" : "=m" (suspend2_saved_context.eflags));
+}
+
+static void fix_processor_context(void)
+{
+ int nr = _smp_processor_id();
+ struct tss_struct * t = &per_cpu(init_tss,nr);
+
+ set_tss_desc(nr,t); /* This just modifies memory; should not be neccessary. But... This is neccessary, because 386 hardware has concept of busy tsc or some similar stupidity. */
+ per_cpu(cpu_gdt_table,nr)[GDT_ENTRY_TSS].b &= 0xfffffdff;
+
+ load_TR_desc();
+
+ load_LDT(¤t->active_mm->context); /* This does lldt */
+
+ /*
+ * Now maybe reload the debug registers
+ */
+ if (current->thread.debugreg[7]){
+ loaddebug(¤t->thread, 0);
+ loaddebug(¤t->thread, 1);
+ loaddebug(¤t->thread, 2);
+ loaddebug(¤t->thread, 3);
+ /* no 4 and 5 */
+ loaddebug(¤t->thread, 6);
+ loaddebug(¤t->thread, 7);
+ }
+
+}
+
+static void do_fpu_end(void)
+{
+ /* restore FPU regs if necessary */
+ /* Do it out of line so that gcc does not move cr0 load to some stupid place */
+ kernel_fpu_end();
+}
+
+/*
+ * restore_processor_context
+ *
+ * Restore the processor context as it was before we went to sleep
+ * - descriptor tables
+ * - control registers
+ * - segment registers
+ * - flags
+ *
+ * Note that it is critical that this function is declared inline.
+ * It was separated out from restore_state to make that function
+ * a little clearer, but it needs to be inlined because we won't have a
+ * stack when we get here (so we can't push a return address).
+ */
+static inline void restore_processor_context(void)
+{
+ /*
+ * first restore %ds, so we can access our data properly
+ */
+ asm volatile (".align 4");
+ asm volatile ("movw %0, %%ds" :: "r" ((u16)__KERNEL_DS));
+
+
+ /*
+ * control registers
+ */
+ asm volatile ("movl %0, %%cr4" :: "r" (suspend2_saved_context.cr4));
+ asm volatile ("movl %0, %%cr3" :: "r" (suspend2_saved_context.cr3));
+ asm volatile ("movl %0, %%cr2" :: "r" (suspend2_saved_context.cr2));
+ asm volatile ("movl %0, %%cr0" :: "r" (suspend2_saved_context.cr0));
+
+ /*
+ * segment registers
+ */
+ asm volatile ("movw %0, %%es" :: "r" (suspend2_saved_context.es));
+ asm volatile ("movw %0, %%fs" :: "r" (suspend2_saved_context.fs));
+ asm volatile ("movw %0, %%gs" :: "r" (suspend2_saved_context.gs));
+ asm volatile ("movw %0, %%ss" :: "r" (suspend2_saved_context.ss));
+
+ /*
+ * the other general registers
+ *
+ * note that even though gcc has constructs to specify memory
+ * input into certain registers, it will try to be too smart
+ * and save them at the beginning of the function. This is esp.
+ * bad since we don't have a stack set up when we enter, and we
+ * want to preserve the values on exit. So, we set them manually.
+ */
+ asm volatile ("movl %0, %%esp" :: "m" (suspend2_saved_context.esp));
+ asm volatile ("movl %0, %%ebp" :: "m" (suspend2_saved_context.ebp));
+ asm volatile ("movl %0, %%eax" :: "m" (suspend2_saved_context.eax));
+ asm volatile ("movl %0, %%ebx" :: "m" (suspend2_saved_context.ebx));
+ asm volatile ("movl %0, %%ecx" :: "m" (suspend2_saved_context.ecx));
+ asm volatile ("movl %0, %%edx" :: "m" (suspend2_saved_context.edx));
+ asm volatile ("movl %0, %%esi" :: "m" (suspend2_saved_context.esi));
+ asm volatile ("movl %0, %%edi" :: "m" (suspend2_saved_context.edi));
+
+ /*
+ * now restore the descriptor tables to their proper values
+ * ltr is done in fix_processor_context().
+ */
+
+ asm volatile ("lgdt (%0)" :: "m" (suspend2_saved_context.gdt_limit));
+ asm volatile ("lidt (%0)" :: "m" (suspend2_saved_context.idt_limit));
+ asm volatile ("lldt (%0)" :: "m" (suspend2_saved_context.ldt));
+
+ fix_processor_context();
+
+ /*
+ * the flags
+ */
+ asm volatile ("pushl %0 ; popfl" :: "m" (suspend2_saved_context.eflags));
+
+ do_fpu_end();
+}
+
+#if defined(CONFIG_SUSPEND2) || defined(CONFIG_SMP)
+extern atomic_t suspend_cpu_counter __nosavedata;
+extern unsigned char * my_saved_context __nosavedata;
+static unsigned long c_loops_per_jiffy_ref[NR_CPUS] __nosavedata;
+#endif
+
+#ifdef CONFIG_SUSPEND2
+#ifndef CONFIG_SMP
+extern unsigned long loops_per_jiffy;
+volatile static unsigned long cpu_khz_ref __nosavedata = 0;
+#endif
+
+/*
+ * APIC support: These routines save the APIC
+ * configuration for the CPU on which they are
+ * being executed
+ */
+extern void suspend_apic_save_state(void);
+extern void suspend_apic_reload_state(void);
+
+#ifdef CONFIG_SMP
+/* ------------------------------------------------
+ * BEGIN Irq affinity code, based on code from LKCD.
+ *
+ * IRQ affinity support:
+ * Save and restore IRQ affinities, and set them
+ * all to CPU 0.
+ *
+ * Section between dashes taken from LKCD code.
+ * Perhaps we should be working toward a shared library
+ * of such routines for kexec, lkcd, software suspend
+ * and whatever other similar projects there are?
+ */
+
+extern irq_desc_t irq_desc[];
+extern cpumask_t irq_affinity[];
+extern cpumask_t saved_affinity[NR_IRQS];
+
+/*
+ * Routine to save the old irq affinities and change affinities of all irqs to
+ * the dumping cpu.
+ */
+static void save_and_set_irq_affinity(void)
+{
+ int i;
+ int cpu = _smp_processor_id();
+
+ memcpy(saved_affinity, irq_affinity, NR_IRQS * sizeof(cpumask_t));
+ for (i = 0; i < NR_IRQS; i++) {
+ if (irq_desc[i].handler == NULL)
+ continue;
+ irq_affinity[i] = cpumask_of_cpu(cpu);
+ if (irq_desc[i].handler->set_affinity != NULL)
+ irq_desc[i].handler->set_affinity(i, irq_affinity[i]);
+ }
+}
+
+/*
+ * Restore old irq affinities.
+ */
+static void reset_irq_affinity(void)
+{
+ int i;
+
+ memcpy(irq_affinity, saved_affinity, NR_IRQS * sizeof(cpumask_t));
+ for (i = 0; i < NR_IRQS; i++) {
+ if (irq_desc[i].handler == NULL)
+ continue;
+ if (irq_desc[i].handler->set_affinity != NULL)
+ irq_desc[i].handler->set_affinity(i, irq_affinity[i]);
+ }
+}
+
+/*
+ * END of IRQ affinity code, based on LKCD code.
+ * -----------------------------------------------------------------
+ */
+#else
+#define save_and_set_irq_affinity() do { } while(0)
+#define reset_irq_affinity() do { } while(0)
+#endif
+
+static inline void suspend2_pre_copy(void)
+{
+ /*
+ * Save the irq affinities before we freeze the
+ * other processors!
+ */
+ save_and_set_irq_affinity();
+ mtrr_save();
+}
+
+static inline void suspend2_post_copy(void)
+{
+}
+
+static inline void suspend2_pre_copyback(void)
+{
+ /* We want to run from swsusp_pg_dir, since swsusp_pg_dir is stored in constant
+ * place in memory
+ */
+
+ __asm__( "movl %%ecx,%%cr3\n" ::"c"(__pa(swsusp_pg_dir)));
+ /* Send all IRQs to CPU 0. We will replace the saved affinities
+ * with the suspend-time ones when we copy the original kernel
+ * back in place
+ */
+ save_and_set_irq_affinity();
+
+ c_loops_per_jiffy_ref[_smp_processor_id()] = current_cpu_data.loops_per_jiffy;
+#ifndef CONFIG_SMP
+ cpu_khz_ref = cpu_khz;
+ c_loops_per_jiffy_ref[_smp_processor_id()] = loops_per_jiffy;
+#endif
+
+}
+
+static inline void suspend2_restore_processor_context(void)
+{
+ restore_processor_context();
+}
+
+static inline void suspend2_flush_caches(void)
+{
+ cpu_clear(_smp_processor_id(), per_cpu(cpu_tlbstate, _smp_processor_id()).active_mm->cpu_vm_mask);
+ wbinvd();
+ __flush_tlb_all();
+
+}
+
+static inline void suspend2_post_copyback(void)
+{
+ mtrr_restore_one_cpu();
+
+ /* Get other CPUs to restore their contexts and flush their tlbs. */
+ clear_suspend_state(SUSPEND_FREEZE_SMP);
+
+ do {
+ cpu_relax();
+ barrier();
+ } while (atomic_read(&suspend_cpu_counter));
+ mtrr_restore_finish();
+
+ BUG_ON(!irqs_disabled());
+
+ /* put the irq affinity tables back */
+ reset_irq_affinity();
+
+ current_cpu_data.loops_per_jiffy = c_loops_per_jiffy_ref[_smp_processor_id()];
+#ifndef CONFIG_SMP
+ loops_per_jiffy = c_loops_per_jiffy_ref[_smp_processor_id()];
+ cpu_khz = cpu_khz_ref;
+#endif
+}
+
+#endif
diff -ruNp 500-version-specific-i386.patch-old/include/asm-i386/suspend.h 500-version-specific-i386.patch-new/include/asm-i386/suspend.h
--- 500-version-specific-i386.patch-old/include/asm-i386/suspend.h 2005-06-20 11:47:15.000000000 +1000
+++ 500-version-specific-i386.patch-new/include/asm-i386/suspend.h 2005-07-04 23:14:19.000000000 +1000
@@ -3,6 +3,7 @@
* Based on code
* Copyright 2001 Patrick Mochel <mochel@xxxxxxxx>
*/
+#include <linux/errno.h>
#include <asm/desc.h>
#include <asm/i387.h>
-
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