From: Glauber de Oliveira Costa Date: Wed, 30 Jan 2008 12:31:12 +0000 (+0100) Subject: x86: unify struct desc_ptr X-Git-Tag: v2.6.25-rc1~1143^2~610 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6b68f01baa810e9f63fbf39e9d5c3ef1d94a966f;p=linux-2.6 x86: unify struct desc_ptr This patch unifies struct desc_ptr between i386 and x86_64. They can be expressed in the exact same way in C code, only having to change the name of one of them. As Xgt_desc_struct is ugly and big, this is the one that goes away. There's also a padding field in i386, but it is not really needed in the C structure definition. Signed-off-by: Glauber de Oliveira Costa Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- diff --git a/arch/x86/kernel/asm-offsets_32.c b/arch/x86/kernel/asm-offsets_32.c index 4153135567..afd84463b7 100644 --- a/arch/x86/kernel/asm-offsets_32.c +++ b/arch/x86/kernel/asm-offsets_32.c @@ -70,9 +70,8 @@ void foo(void) OFFSET(TI_cpu, thread_info, cpu); BLANK(); - OFFSET(GDS_size, Xgt_desc_struct, size); - OFFSET(GDS_address, Xgt_desc_struct, address); - OFFSET(GDS_pad, Xgt_desc_struct, pad); + OFFSET(GDS_size, desc_ptr, size); + OFFSET(GDS_address, desc_ptr, address); BLANK(); OFFSET(PT_EBX, pt_regs, bx); diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 4f9e31912a..69507ae8a6 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -649,7 +649,7 @@ struct pt_regs * __devinit idle_regs(struct pt_regs *regs) * it's on the real one. */ void switch_to_new_gdt(void) { - struct Xgt_desc_struct gdt_descr; + struct desc_ptr gdt_descr; gdt_descr.address = (long)get_cpu_gdt_table(smp_processor_id()); gdt_descr.size = GDT_SIZE - 1; diff --git a/arch/x86/kernel/doublefault_32.c b/arch/x86/kernel/doublefault_32.c index cc19a3ea40..d16122a8e4 100644 --- a/arch/x86/kernel/doublefault_32.c +++ b/arch/x86/kernel/doublefault_32.c @@ -17,7 +17,7 @@ static unsigned long doublefault_stack[DOUBLEFAULT_STACKSIZE]; static void doublefault_fn(void) { - struct Xgt_desc_struct gdt_desc = {0, 0}; + struct desc_ptr gdt_desc = {0, 0}; unsigned long gdt, tss; store_gdt(&gdt_desc); diff --git a/arch/x86/kernel/efi_32.c b/arch/x86/kernel/efi_32.c index e2be78f493..863e8926f2 100644 --- a/arch/x86/kernel/efi_32.c +++ b/arch/x86/kernel/efi_32.c @@ -69,7 +69,7 @@ static void efi_call_phys_prelog(void) __acquires(efi_rt_lock) { unsigned long cr4; unsigned long temp; - struct Xgt_desc_struct gdt_descr; + struct desc_ptr gdt_descr; spin_lock(&efi_rt_lock); local_irq_save(efi_rt_eflags); @@ -111,7 +111,7 @@ static void efi_call_phys_prelog(void) __acquires(efi_rt_lock) static void efi_call_phys_epilog(void) __releases(efi_rt_lock) { unsigned long cr4; - struct Xgt_desc_struct gdt_descr; + struct desc_ptr gdt_descr; gdt_descr.address = (unsigned long)get_cpu_gdt_table(0); gdt_descr.size = GDT_SIZE - 1; diff --git a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c index 11b935f4f8..c1cfd60639 100644 --- a/arch/x86/kernel/machine_kexec_32.c +++ b/arch/x86/kernel/machine_kexec_32.c @@ -32,7 +32,7 @@ static u32 kexec_pte1[1024] PAGE_ALIGNED; static void set_idt(void *newidt, __u16 limit) { - struct Xgt_desc_struct curidt; + struct desc_ptr curidt; /* ia32 supports unaliged loads & stores */ curidt.size = limit; @@ -44,7 +44,7 @@ static void set_idt(void *newidt, __u16 limit) static void set_gdt(void *newgdt, __u16 limit) { - struct Xgt_desc_struct curgdt; + struct desc_ptr curgdt; /* ia32 supports unaligned loads & stores */ curgdt.size = limit; diff --git a/arch/x86/kernel/reboot_32.c b/arch/x86/kernel/reboot_32.c index bb1a0f889c..c3376fae63 100644 --- a/arch/x86/kernel/reboot_32.c +++ b/arch/x86/kernel/reboot_32.c @@ -161,7 +161,7 @@ real_mode_gdt_entries [3] = 0x000092000100ffffULL /* 16-bit real-mode 64k data at 0x00000100 */ }; -static struct Xgt_desc_struct +static struct desc_ptr real_mode_gdt = { sizeof (real_mode_gdt_entries) - 1, (long)real_mode_gdt_entries }, real_mode_idt = { 0x3ff, 0 }, no_idt = { 0, 0 }; diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c index c751e3c03e..aa0bdd5fc4 100644 --- a/arch/x86/lguest/boot.c +++ b/arch/x86/lguest/boot.c @@ -229,7 +229,7 @@ static void lguest_write_idt_entry(struct desc_struct *dt, /* Changing to a different IDT is very rare: we keep the IDT up-to-date every * time it is written, so we can simply loop through all entries and tell the * Host about them. */ -static void lguest_load_idt(const struct Xgt_desc_struct *desc) +static void lguest_load_idt(const struct desc_ptr *desc) { unsigned int i; struct desc_struct *idt = (void *)desc->address; @@ -252,7 +252,7 @@ static void lguest_load_idt(const struct Xgt_desc_struct *desc) * hypercall and use that repeatedly to load a new IDT. I don't think it * really matters, but wouldn't it be nice if they were the same? */ -static void lguest_load_gdt(const struct Xgt_desc_struct *desc) +static void lguest_load_gdt(const struct desc_ptr *desc) { BUG_ON((desc->size+1)/8 != GDT_ENTRIES); hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0); diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index d81e8d7091..c32e0fd0f8 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -295,7 +295,7 @@ static void xen_set_ldt(const void *addr, unsigned entries) xen_mc_issue(PARAVIRT_LAZY_CPU); } -static void xen_load_gdt(const struct Xgt_desc_struct *dtr) +static void xen_load_gdt(const struct desc_ptr *dtr) { unsigned long *frames; unsigned long va = dtr->address; @@ -395,7 +395,7 @@ static int cvt_gate_to_trap(int vector, u32 low, u32 high, } /* Locations of each CPU's IDT */ -static DEFINE_PER_CPU(struct Xgt_desc_struct, idt_desc); +static DEFINE_PER_CPU(struct desc_ptr, idt_desc); /* Set an IDT entry. If the entry is part of the current IDT, then also update Xen. */ @@ -427,7 +427,7 @@ static void xen_write_idt_entry(struct desc_struct *dt, int entrynum, preempt_enable(); } -static void xen_convert_trap_info(const struct Xgt_desc_struct *desc, +static void xen_convert_trap_info(const struct desc_ptr *desc, struct trap_info *traps) { unsigned in, out, count; @@ -446,7 +446,7 @@ static void xen_convert_trap_info(const struct Xgt_desc_struct *desc, void xen_copy_trap_info(struct trap_info *traps) { - const struct Xgt_desc_struct *desc = &__get_cpu_var(idt_desc); + const struct desc_ptr *desc = &__get_cpu_var(idt_desc); xen_convert_trap_info(desc, traps); } @@ -454,7 +454,7 @@ void xen_copy_trap_info(struct trap_info *traps) /* Load a new IDT into Xen. In principle this can be per-CPU, so we hold a spinlock to protect the static traps[] array (static because it avoids allocation, and saves stack space). */ -static void xen_load_idt(const struct Xgt_desc_struct *desc) +static void xen_load_idt(const struct desc_ptr *desc) { static DEFINE_SPINLOCK(lock); static struct trap_info traps[257]; diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index 4e04e49a2f..ced4ac1955 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -290,7 +290,7 @@ static void svm_hardware_enable(void *garbage) #ifdef CONFIG_X86_64 struct desc_ptr gdt_descr; #else - struct Xgt_desc_struct gdt_descr; + struct desc_ptr gdt_descr; #endif struct desc_struct *gdt; int me = raw_smp_processor_id(); diff --git a/include/asm-x86/desc_32.h b/include/asm-x86/desc_32.h index c547403f34..bc5ca34534 100644 --- a/include/asm-x86/desc_32.h +++ b/include/asm-x86/desc_32.h @@ -12,12 +12,6 @@ #include -struct Xgt_desc_struct { - unsigned short size; - unsigned long address __attribute__((packed)); - unsigned short pad; -} __attribute__ ((packed)); - struct gdt_page { struct desc_struct gdt[GDT_ENTRIES]; @@ -29,7 +23,7 @@ static inline struct desc_struct *get_cpu_gdt_table(unsigned int cpu) return per_cpu(gdt_page, cpu).gdt; } -extern struct Xgt_desc_struct idt_descr; +extern struct desc_ptr idt_descr; extern struct desc_struct idt_table[]; extern void set_intr_gate(unsigned int irq, void * addr); @@ -107,22 +101,22 @@ static inline void native_load_tr_desc(void) asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8)); } -static inline void native_load_gdt(const struct Xgt_desc_struct *dtr) +static inline void native_load_gdt(const struct desc_ptr *dtr) { asm volatile("lgdt %0"::"m" (*dtr)); } -static inline void native_load_idt(const struct Xgt_desc_struct *dtr) +static inline void native_load_idt(const struct desc_ptr *dtr) { asm volatile("lidt %0"::"m" (*dtr)); } -static inline void native_store_gdt(struct Xgt_desc_struct *dtr) +static inline void native_store_gdt(struct desc_ptr *dtr) { asm ("sgdt %0":"=m" (*dtr)); } -static inline void native_store_idt(struct Xgt_desc_struct *dtr) +static inline void native_store_idt(struct desc_ptr *dtr) { asm ("sidt %0":"=m" (*dtr)); } diff --git a/include/asm-x86/lguest.h b/include/asm-x86/lguest.h index 17c908c0ef..3585a1628b 100644 --- a/include/asm-x86/lguest.h +++ b/include/asm-x86/lguest.h @@ -44,13 +44,13 @@ struct lguest_ro_state { /* Host information we need to restore when we switch back. */ u32 host_cr3; - struct Xgt_desc_struct host_idt_desc; - struct Xgt_desc_struct host_gdt_desc; + struct desc_ptr host_idt_desc; + struct desc_ptr host_gdt_desc; u32 host_sp; /* Fields which are used when guest is running. */ - struct Xgt_desc_struct guest_idt_desc; - struct Xgt_desc_struct guest_gdt_desc; + struct desc_ptr guest_idt_desc; + struct desc_ptr guest_gdt_desc; struct i386_hw_tss guest_tss; struct desc_struct guest_idt[IDT_ENTRIES]; struct desc_struct guest_gdt[GDT_ENTRIES]; diff --git a/include/asm-x86/paravirt.h b/include/asm-x86/paravirt.h index e95c2a6551..0333fb6988 100644 --- a/include/asm-x86/paravirt.h +++ b/include/asm-x86/paravirt.h @@ -20,7 +20,7 @@ struct page; struct thread_struct; -struct Xgt_desc_struct; +struct desc_ptr; struct tss_struct; struct mm_struct; struct desc_struct; @@ -88,10 +88,10 @@ struct pv_cpu_ops { /* Segment descriptor handling */ void (*load_tr_desc)(void); - void (*load_gdt)(const struct Xgt_desc_struct *); - void (*load_idt)(const struct Xgt_desc_struct *); - void (*store_gdt)(struct Xgt_desc_struct *); - void (*store_idt)(struct Xgt_desc_struct *); + void (*load_gdt)(const struct desc_ptr *); + void (*load_idt)(const struct desc_ptr *); + void (*store_gdt)(struct desc_ptr *); + void (*store_idt)(struct desc_ptr *); void (*set_ldt)(const void *desc, unsigned entries); unsigned long (*store_tr)(void); void (*load_tls)(struct thread_struct *t, unsigned int cpu); @@ -630,11 +630,11 @@ static inline void load_TR_desc(void) { PVOP_VCALL0(pv_cpu_ops.load_tr_desc); } -static inline void load_gdt(const struct Xgt_desc_struct *dtr) +static inline void load_gdt(const struct desc_ptr *dtr) { PVOP_VCALL1(pv_cpu_ops.load_gdt, dtr); } -static inline void load_idt(const struct Xgt_desc_struct *dtr) +static inline void load_idt(const struct desc_ptr *dtr) { PVOP_VCALL1(pv_cpu_ops.load_idt, dtr); } @@ -642,11 +642,11 @@ static inline void set_ldt(const void *addr, unsigned entries) { PVOP_VCALL2(pv_cpu_ops.set_ldt, addr, entries); } -static inline void store_gdt(struct Xgt_desc_struct *dtr) +static inline void store_gdt(struct desc_ptr *dtr) { PVOP_VCALL1(pv_cpu_ops.store_gdt, dtr); } -static inline void store_idt(struct Xgt_desc_struct *dtr) +static inline void store_idt(struct desc_ptr *dtr) { PVOP_VCALL1(pv_cpu_ops.store_idt, dtr); } diff --git a/include/asm-x86/processor_32.h b/include/asm-x86/processor_32.h index bc48ad64de..e5056ab9dd 100644 --- a/include/asm-x86/processor_32.h +++ b/include/asm-x86/processor_32.h @@ -707,7 +707,7 @@ extern void enable_sep_cpu(void); extern int sysenter_setup(void); /* Defined in head.S */ -extern struct Xgt_desc_struct early_gdt_descr; +extern struct desc_ptr early_gdt_descr; extern void cpu_set_gdt(int); extern void switch_to_new_gdt(void); diff --git a/include/asm-x86/suspend_32.h b/include/asm-x86/suspend_32.h index a2520732ff..1bbda3ad77 100644 --- a/include/asm-x86/suspend_32.h +++ b/include/asm-x86/suspend_32.h @@ -12,8 +12,8 @@ static inline int arch_prepare_suspend(void) { return 0; } struct saved_context { u16 es, fs, gs, ss; unsigned long cr0, cr2, cr3, cr4; - struct Xgt_desc_struct gdt; - struct Xgt_desc_struct idt; + struct desc_ptr gdt; + struct desc_ptr idt; u16 ldt; u16 tss; unsigned long tr;