search for: lldt

...nclude/asm-i386/desc.h 2005-08-08 17:15:46.000000000 -0700 @@ -31,18 +31,18 @@ extern struct Xgt_desc_struct idt_descr, cpu_gdt_descr[NR_CPUS]; -#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) +#define load_TR_desc() asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) +#define load_LDT_desc() asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) -#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"...

...nclude/asm-i386/desc.h 2005-08-08 17:15:46.000000000 -0700 @@ -31,18 +31,18 @@ extern struct Xgt_desc_struct idt_descr, cpu_gdt_descr[NR_CPUS]; -#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) +#define load_TR_desc() asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) +#define load_LDT_desc() asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) -#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"...

...13/include/asm-i386/mach-default/mach_desc.h 2005-08-10 20:42:03.000000000 -0700 @@ -24,30 +24,30 @@ #ifndef __MACH_DESC_H #define __MACH_DESC_H -#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) +#define load_TR_desc() asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) +#define load_LDT_desc() asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) -#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"...

...13/include/asm-i386/mach-default/mach_desc.h 2005-08-10 20:42:03.000000000 -0700 @@ -24,30 +24,30 @@ #ifndef __MACH_DESC_H #define __MACH_DESC_H -#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) +#define load_TR_desc() asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) +#define load_LDT_desc() asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) -#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"...

...-- clean-start.orig/include/asm-x86_64/desc.h +++ clean-start/include/asm-x86_64/desc.h @@ -16,9 +16,8 @@ extern struct desc_struct cpu_gdt_table[GDT_ENTRIES]; -#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8)) -#define clear_LDT() asm volatile("lldt %w0"::"r" (0)) +/* the cpu gdt accessor */ +#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) /* * This is the ldt that every process will get unless we need @@ -28,...

...-- clean-start.orig/include/asm-x86_64/desc.h +++ clean-start/include/asm-x86_64/desc.h @@ -16,9 +16,8 @@ extern struct desc_struct cpu_gdt_table[GDT_ENTRIES]; -#define load_TR_desc() asm volatile("ltr %w0"::"r" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() asm volatile("lldt %w0"::"r" (GDT_ENTRY_LDT*8)) -#define clear_LDT() asm volatile("lldt %w0"::"r" (0)) +/* the cpu gdt accessor */ +#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) /* * This is the ldt that every process will get unless we need @@ -28,...

...++ linux-2.6.13/include/asm-i386/desc.h 2005-08-08 17:36:35.000000000 -0700 @@ -33,19 +33,6 @@ extern struct Xgt_desc_struct idt_descr, cpu_gdt_descr[NR_CPUS]; -#define load_TR_desc() asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) - -#define load_gdt(dtr) asm volatile("lgdtl %0"::"m" (*dtr)) -#define load_idt(dtr) asm volatile("lidtl %0"::"m" (*dtr)) -#define load_tr(tr) asm volatile("ltr %0"::"mr" (tr)) -#define load_ldt(...

...++ linux-2.6.13/include/asm-i386/desc.h 2005-08-08 17:36:35.000000000 -0700 @@ -33,19 +33,6 @@ extern struct Xgt_desc_struct idt_descr, cpu_gdt_descr[NR_CPUS]; -#define load_TR_desc() asm volatile("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() asm volatile("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) - -#define load_gdt(dtr) asm volatile("lgdtl %0"::"m" (*dtr)) -#define load_idt(dtr) asm volatile("lidtl %0"::"m" (*dtr)) -#define load_tr(tr) asm volatile("ltr %0"::"mr" (tr)) -#define load_ldt(...

Hi, this is a series of patches that unify the struct desc_struct and friends across x86_64 and i386. As usual, it provides paravirt capabilities as a side-effect for x86_64. I consider the main goal, namely, of unifying the desc_struct, an ongoing effort, being this the beginning. A lot of old code has to be touched to accomplish that. I don't consider this patch ready for inclusion.

Hi, this is a series of patches that unify the struct desc_struct and friends across x86_64 and i386. As usual, it provides paravirt capabilities as a side-effect for x86_64. I consider the main goal, namely, of unifying the desc_struct, an ongoing effort, being this the beginning. A lot of old code has to be touched to accomplish that. I don't consider this patch ready for inclusion.

...00000000 -0800 @@ -33,50 +33,66 @@ static inline struct desc_struct *get_cp return (struct desc_struct *)per_cpu(cpu_gdt_descr, cpu).address; } -#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) - -#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr)) -#define load_idt(dtr) __asm__ __volatile("lidt %0"::"m" (*dtr)) -#define load_tr(tr) __asm__ __volatile("ltr %0"::"mr" (tr)) -#...

...00000000 -0800 @@ -33,50 +33,66 @@ static inline struct desc_struct *get_cp return (struct desc_struct *)per_cpu(cpu_gdt_descr, cpu).address; } -#define load_TR_desc() __asm__ __volatile__("ltr %w0"::"q" (GDT_ENTRY_TSS*8)) -#define load_LDT_desc() __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)) - -#define load_gdt(dtr) __asm__ __volatile("lgdt %0"::"m" (*dtr)) -#define load_idt(dtr) __asm__ __volatile("lidt %0"::"m" (*dtr)) -#define load_tr(tr) __asm__ __volatile("ltr %0"::"mr" (tr)) -#...

....long 0 @@ -184,7 +197,11 @@ ENTRY(wakeup_end) .org 0x1000 wakeup_pmode_return: +#ifndef __XEN__ movw $__KERNEL_DS, %ax +#else + movw $__HYPERVISOR_DS, %ax +#endif movw %ax, %ss movw %ax, %ds movw %ax, %es @@ -196,7 +213,11 @@ wakeup_pmode_return: lgdt saved_gdt lidt saved_idt lldt saved_ldt +#ifndef __XEN__ ljmp $(__KERNEL_CS),$1f +#else + ljmp $(__HYPERVISOR_CS),$1f +#endif 1: movl %cr3, %eax movl %eax, %cr3 diff -r 13e258a58044 xen/arch/x86/x86_32/mm.c --- a/xen/arch/x86/x86_32/mm.c Wed Feb 14 11:13:40 2007 +0800 +++ b/xen/arch/x86/x86_32/mm.c Wed Feb 14 11:13:40...

At the moment, all the places where the LDT are set in the kernel are of the form: set_ldt_desc(cpu, segments, count); load_LDT_desc(); (two instances in asm-i386/desc.h). set_ldt_desc() sets an LDT descriptor in the GDT, and load_LDT_desc() is basically just lldt. These map to the write_gdt_entry and load_ldt_desc paravirt ops. This doesn't work well for Xen, because you set the ldt directly by passing the base+size into the hypervisor. In fact, it doesn't allow you to set an LDT-type descriptor into the GDT, so this current interface requires...

...e open projects page, found some interesting projects but still have some questions about them: "Add support for 16-bit x86 assembly and real mode to the assembler and disassembler, for use by BIOS code. This includes both 16-bit instruction encodings as well as privileged instructions (lgdt, lldt, ltr, lmsw, clts, invd, invlpg, wbinvd, hlt, rdmsr, wrmsr, rdpmc, rdtsc) and the control and debug registers." Correct me if I'm mistaken, but isn't this already implemented in llvm mc? I haven't searched for every instruction part of these architectures but I was able find to som...

...t; - pack_ldt(&ldt, (unsigned long)addr, - entries * sizeof(ldt) - 1); + set_tssldt_descriptor(&ldt, (unsigned long)addr, + DESC_LDT, entries * sizeof(ldt) - 1); write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &ldt, DESC_LDT); __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)); -- 1.4.4.2

...t; - pack_ldt(&ldt, (unsigned long)addr, - entries * sizeof(ldt) - 1); + set_tssldt_descriptor(&ldt, (unsigned long)addr, + DESC_LDT, entries * sizeof(ldt) - 1); write_gdt_entry(get_cpu_gdt_table(cpu), GDT_ENTRY_LDT, &ldt, DESC_LDT); __asm__ __volatile__("lldt %w0"::"q" (GDT_ENTRY_LDT*8)); -- 1.4.4.2

(Andrew, please sit these in the -mm tree for cooking) Create a paravirt.h header for (almost) all the critical operations which need to be replaced with hypervisor calls. For the moment, this simply includes no_paravirt.h, where all the native implementations now live. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Zachary Amsden <zach@vmware.com>

(Andrew, please sit these in the -mm tree for cooking) Create a paravirt.h header for (almost) all the critical operations which need to be replaced with hypervisor calls. For the moment, this simply includes no_paravirt.h, where all the native implementations now live. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Zachary Amsden <zach@vmware.com>

Chris Wright wrote: >* Zachary Amsden (zach@vmware.com) wrote: > > >>Does Xen assume page aligned descriptor tables? I assume from this >> >> > >Yes. > > > >>patch and snippets I have gathered from others, that is a yes, and other >>things here imply that DT pages are not shadowed. If so, Xen itself >>must have live segments