search for: local_save_flag

Hi. This patchset is preparation patches for ia64/pv_ops support. They are almost trivial and mainly make kernel paravirtualization friendly. thanks, Diffstat: arch/ia64/kernel/irq_ia64.c | 1 - include/asm-ia64/intrinsics.h | 11 +++++++++++ include/asm-ia64/mmu_context.h | 6 +----- include/asm-ia64/smp.h | 2 ++ include/asm-ia64/system.h | 10 ++++++++-- 5 files

...__ __volatile__ ("wbinvd": : :"memory"); - static inline unsigned long get_limit(unsigned long segment) { unsigned long __limit; @@ -518,16 +459,7 @@ struct alt_instr { #define set_wmb(var, value) do { var = value; wmb(); } while (0) -/* interrupt control.. */ -#define local_save_flags(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushfl ; popl %0":"=g" (x): /* no input */); } while (0) -#define local_irq_restore(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushl %0 ; popfl": /* no output */ :"g" (x):"memory&...

...__ __volatile__ ("wbinvd": : :"memory"); - static inline unsigned long get_limit(unsigned long segment) { unsigned long __limit; @@ -518,16 +459,7 @@ struct alt_instr { #define set_wmb(var, value) do { var = value; wmb(); } while (0) -/* interrupt control.. */ -#define local_save_flags(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushfl ; popl %0":"=g" (x): /* no input */); } while (0) -#define local_irq_restore(x) do { typecheck(unsigned long,x); __asm__ __volatile__("pushl %0 ; popfl": /* no output */ :"g" (x):"memory&...

Hi, I have some confusion on local_irq_save() and local_irq_restore(). From the definitions, you can see that local_irq_save() calls local_irq_disable(). But why there is no local_irq_enable() in local_irq_restore? #define local_irq_save(x) ({ local_save_flags(x); local_irq_disable(); }) #define local_irq_restore(x) ({ BUILD_BUG_ON(sizeof(x) != sizeof(long)); asm volatile ( "push" __OS " %0 ; popf" __OS : : "g" (x) : "memory", "cc" ); }) -- Xinxin ___________________...

...desc_struct *gdt; cpus = apm_save_cpus(); cpu = get_cpu(); - save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8]; - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc; + gdt = get_cpu_gdt_table(cpu); + save_desc_40 = gdt[desc_number(0x40)]; + gdt[desc_number(0x40)] = bad_bios_desc; local_save_flags(flags); APM_DO_CLI; @@ -610,7 +612,7 @@ apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi); APM_DO_RESTORE_SEGS; local_irq_restore(flags); - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = save_desc_40; + gdt[desc_number(0x40)] = save_desc_40; put_cpu(); apm_restore_cpus(cpus);...

...desc_struct *gdt; cpus = apm_save_cpus(); cpu = get_cpu(); - save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8]; - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc; + gdt = get_cpu_gdt_table(cpu); + save_desc_40 = gdt[desc_number(0x40)]; + gdt[desc_number(0x40)] = bad_bios_desc; local_save_flags(flags); APM_DO_CLI; @@ -610,7 +612,7 @@ apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi); APM_DO_RESTORE_SEGS; local_irq_restore(flags); - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = save_desc_40; + gdt[desc_number(0x40)] = save_desc_40; put_cpu(); apm_restore_cpus(cpus);...

...desc_40; + struct desc_struct *gdt; cpus = apm_save_cpus(); cpu = get_cpu(); - save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8]; - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc; + gdt = get_cpu_gdt_table(cpu); + save_desc_40 = gdt[0x40 / 8]; + gdt[0x40 / 8] = bad_bios_desc; local_save_flags(flags); APM_DO_CLI; @@ -610,7 +612,7 @@ static u8 apm_bios_call(u32 func, u32 eb apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi); APM_DO_RESTORE_SEGS; local_irq_restore(flags); - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = save_desc_40; + gdt[0x40 / 8] = save_desc_40; put_cp...

...desc_40; + struct desc_struct *gdt; cpus = apm_save_cpus(); cpu = get_cpu(); - save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8]; - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc; + gdt = get_cpu_gdt_table(cpu); + save_desc_40 = gdt[0x40 / 8]; + gdt[0x40 / 8] = bad_bios_desc; local_save_flags(flags); APM_DO_CLI; @@ -610,7 +612,7 @@ static u8 apm_bios_call(u32 func, u32 eb apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi); APM_DO_RESTORE_SEGS; local_irq_restore(flags); - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = save_desc_40; + gdt[0x40 / 8] = save_desc_40; put_cp...

...tatic char driver_version[] = "1.16ac"; /* no spaces */ @@ -593,7 +592,7 @@ static u8 apm_bios_call(u32 func, u32 eb cpu = get_cpu(); gdt = get_cpu_gdt_table(cpu); save_desc_40 = gdt[0x40 / 8]; - gdt[0x40 / 8] = bad_bios_desc; + gdt[0x40 / 8] = gdt[GDT_ENTRY_BAD_BIOS_CACHE]; local_save_flags(flags); APM_DO_CLI; @@ -637,7 +636,7 @@ static u8 apm_bios_call_simple(u32 func, cpu = get_cpu(); gdt = get_cpu_gdt_table(cpu); save_desc_40 = gdt[0x40 / 8]; - gdt[0x40 / 8] = bad_bios_desc; + gdt[0x40 / 8] = gdt[GDT_ENTRY_BAD_BIOS_CACHE]; local_save_flags(flags); APM_DO_CLI; @@ -227...

...tatic char driver_version[] = "1.16ac"; /* no spaces */ @@ -593,7 +592,7 @@ static u8 apm_bios_call(u32 func, u32 eb cpu = get_cpu(); gdt = get_cpu_gdt_table(cpu); save_desc_40 = gdt[0x40 / 8]; - gdt[0x40 / 8] = bad_bios_desc; + gdt[0x40 / 8] = gdt[GDT_ENTRY_BAD_BIOS_CACHE]; local_save_flags(flags); APM_DO_CLI; @@ -637,7 +636,7 @@ static u8 apm_bios_call_simple(u32 func, cpu = get_cpu(); gdt = get_cpu_gdt_table(cpu); save_desc_40 = gdt[0x40 / 8]; - gdt[0x40 / 8] = bad_bios_desc; + gdt[0x40 / 8] = gdt[GDT_ENTRY_BAD_BIOS_CACHE]; local_save_flags(flags); APM_DO_CLI; @@ -227...

..._struct *gdt; cpus = apm_save_cpus(); cpu = get_cpu(); - save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8]; - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc; + gdt = get_cpu_gdt_table(cpu); + save_desc_40 = gdt[segment_index(0x40)]; + gdt[segment_index(0x40)] = bad_bios_desc; local_save_flags(flags); APM_DO_CLI; @@ -610,7 +612,7 @@ apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi); APM_DO_RESTORE_SEGS; local_irq_restore(flags); - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = save_desc_40; + gdt[segment_index(0x40)] = save_desc_40; put_cpu(); apm_restore_cpus(cpus);...

..._struct *gdt; cpus = apm_save_cpus(); cpu = get_cpu(); - save_desc_40 = per_cpu(cpu_gdt_table, cpu)[0x40 / 8]; - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = bad_bios_desc; + gdt = get_cpu_gdt_table(cpu); + save_desc_40 = gdt[segment_index(0x40)]; + gdt[segment_index(0x40)] = bad_bios_desc; local_save_flags(flags); APM_DO_CLI; @@ -610,7 +612,7 @@ apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi); APM_DO_RESTORE_SEGS; local_irq_restore(flags); - per_cpu(cpu_gdt_table, cpu)[0x40 / 8] = save_desc_40; + gdt[segment_index(0x40)] = save_desc_40; put_cpu(); apm_restore_cpus(cpus);...

...ct *gdt; + unsigned long flags; + cpumask_t cpus; + struct bios_segment_save save_area; cpus = apm_save_cpus(); - cpu = get_cpu(); - gdt = get_cpu_gdt_table(cpu); - save_desc_40 = gdt[0x40 / 8]; - gdt[0x40 / 8] = gdt[GDT_ENTRY_BAD_BIOS_CACHE]; - + prepare_bios_segments(&save_area); local_save_flags(flags); APM_DO_CLI; - APM_DO_SAVE_SEGS; apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi); - APM_DO_RESTORE_SEGS; local_irq_restore(flags); - gdt[0x40 / 8] = save_desc_40; - put_cpu(); + restore_bios_segments(&save_area); apm_restore_cpus(cpus); return *eax & 0x...

...ct *gdt; + unsigned long flags; + cpumask_t cpus; + struct bios_segment_save save_area; cpus = apm_save_cpus(); - cpu = get_cpu(); - gdt = get_cpu_gdt_table(cpu); - save_desc_40 = gdt[0x40 / 8]; - gdt[0x40 / 8] = gdt[GDT_ENTRY_BAD_BIOS_CACHE]; - + prepare_bios_segments(&save_area); local_save_flags(flags); APM_DO_CLI; - APM_DO_SAVE_SEGS; apm_bios_call_asm(func, ebx_in, ecx_in, eax, ebx, ecx, edx, esi); - APM_DO_RESTORE_SEGS; local_irq_restore(flags); - gdt[0x40 / 8] = save_desc_40; - put_cpu(); + restore_bios_segments(&save_area); apm_restore_cpus(cpus); return *eax & 0x...

...+74,11 @@ #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT -static inline void safe_halt(void) -{ - trace_hardirqs_on(); - raw_safe_halt(); -} +#define safe_halt() \ + do { \ + trace_hardirqs_on(); \ + raw_safe_halt(); \ + } while (0) #define local_save_flags(flags) raw_local_save_flags(flags) --

...+74,11 @@ #endif /* CONFIG_TRACE_IRQFLAGS_SUPPORT */ #ifdef CONFIG_TRACE_IRQFLAGS_SUPPORT -static inline void safe_halt(void) -{ - trace_hardirqs_on(); - raw_safe_halt(); -} +#define safe_halt() \ + do { \ + trace_hardirqs_on(); \ + raw_safe_halt(); \ + } while (0) #define local_save_flags(flags) raw_local_save_flags(flags) --

...sor()) + splpar_spin_yield(lock); + } while (unlikely(lock->slock != 0)); + HMT_medium(); + } +} + +static inline +void arch_spin_lock_flags(arch_spinlock_t *lock, unsigned long flags) +{ + unsigned long flags_dis; + + while (1) { + if (likely(__arch_spin_trylock(lock) == 0)) + break; + local_save_flags(flags_dis); + local_irq_restore(flags); + do { + HMT_low(); + if (is_shared_processor()) + splpar_spin_yield(lock); + } while (unlikely(lock->slock != 0)); + HMT_medium(); + local_irq_restore(flags_dis); + } +} +#define arch_spin_lock_flags arch_spin_lock_flags + +static inline void...

Hi all, I've been looking at finding common ground between the VMI, Xen and other paravirtualization approaches, and after some discussion, we're getting somewhere. These first two patches are the fundamentals, stolen mainly from the VMI patches: removing assumptions about the kernel running in ring 0, and macro-izing all the obvious para-virtualize-needing insns. The third patch is

Hi all, I've been looking at finding common ground between the VMI, Xen and other paravirtualization approaches, and after some discussion, we're getting somewhere. These first two patches are the fundamentals, stolen mainly from the VMI patches: removing assumptions about the kernel running in ring 0, and macro-izing all the obvious para-virtualize-needing insns. The third patch is

This round implements all of the review comments from V2 and all patches are now acked. Unless there are any objections I intend to apply later this morning. Ian.