search for: lguest_load_gdt

.../lguest.c @@ -107,9 +107,8 @@ static void fastcall irq_disable(void) static void fastcall irq_enable(void) { - /* Linux i386 code expects bit 9 set. */ /* FIXME: Check if interrupt pending... */ - lguest_data.irq_enabled = 512; + lguest_data.irq_enabled = EFLAGS_IF; } static void fastcall lguest_load_gdt(const struct Xgt_desc_struct *desc) @@ -394,7 +393,7 @@ static fastcall void lguest_write_idt_en extern const char start_##name[], end_##name[]; \ asm("start_" #name ": " code "; end_" #name ":") DEF_LGUEST(cli, "movl $0," LGUEST_IRQ); -DEF_LG...

.../lguest.c @@ -107,9 +107,8 @@ static void fastcall irq_disable(void) static void fastcall irq_enable(void) { - /* Linux i386 code expects bit 9 set. */ /* FIXME: Check if interrupt pending... */ - lguest_data.irq_enabled = 512; + lguest_data.irq_enabled = EFLAGS_IF; } static void fastcall lguest_load_gdt(const struct Xgt_desc_struct *desc) @@ -394,7 +393,7 @@ static fastcall void lguest_write_idt_en extern const char start_##name[], end_##name[]; \ asm("start_" #name ": " code "; end_" #name ":") DEF_LGUEST(cli, "movl $0," LGUEST_IRQ); -DEF_LG...

...DT_ENTRY, entrynum, low, high); +} + +static void lguest_load_idt(const struct Xgt_desc_struct *desc) +{ + unsigned int i; + struct desc_struct *idt = (void *)desc->address; + + for (i = 0; i < (desc->size+1)/8; i++) + hcall(LHCALL_LOAD_IDT_ENTRY, i, idt[i].a, idt[i].b); +} + +static void lguest_load_gdt(const struct Xgt_desc_struct *desc) +{ + BUG_ON((desc->size+1)/8 != GDT_ENTRIES); + hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0); +} + +static void lguest_write_gdt_entry(struct desc_struct *dt, + int entrynum, u32 low, u32 high) +{ + write_dt_entry(dt, entrynum, low, hig...

...DT_ENTRY, entrynum, low, high); +} + +static void lguest_load_idt(const struct Xgt_desc_struct *desc) +{ + unsigned int i; + struct desc_struct *idt = (void *)desc->address; + + for (i = 0; i < (desc->size+1)/8; i++) + hcall(LHCALL_LOAD_IDT_ENTRY, i, idt[i].a, idt[i].b); +} + +static void lguest_load_gdt(const struct Xgt_desc_struct *desc) +{ + BUG_ON((desc->size+1)/8 != GDT_ENTRIES); + hcall(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES, 0); +} + +static void lguest_write_gdt_entry(struct desc_struct *dt, + int entrynum, u32 low, u32 high) +{ + write_dt_entry(dt, entrynum, low, hig...

As promised to Andrew, and with much thanks to Andi Kleen for feedback, this is the new series of lguest patches. Main change is the move to drivers/lguest (for future non-i386 expansion), but lots of cleanups driven by Andi's feedback and the documentation effort (which made me examine every line of code). It's not perfect, but it's definitely useful. Cheers, Rusty. List of

As promised to Andrew, and with much thanks to Andi Kleen for feedback, this is the new series of lguest patches. Main change is the move to drivers/lguest (for future non-i386 expansion), but lots of cleanups driven by Andi's feedback and the documentation effort (which made me examine every line of code). It's not perfect, but it's definitely useful. Cheers, Rusty. List of

...TRY - * 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? Wouldn't - * it be even better if you were the one to send the patch to fix it? + * This is the exactly like the IDT code. */ static void lguest_load_gdt(const struct desc_ptr *desc) { - BUG_ON((desc->size + 1) / 8 != GDT_ENTRIES); - kvm_hypercall2(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES); + unsigned int i; + struct desc_struct *gdt = (void *)desc->address; + + for (i = 0; i < (desc->size+1)/8; i++) + kvm_hypercall3(LHCALL...

...TRY - * 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? Wouldn't - * it be even better if you were the one to send the patch to fix it? + * This is the exactly like the IDT code. */ static void lguest_load_gdt(const struct desc_ptr *desc) { - BUG_ON((desc->size + 1) / 8 != GDT_ENTRIES); - kvm_hypercall2(LHCALL_LOAD_GDT, __pa(desc->address), GDT_ENTRIES); + unsigned int i; + struct desc_struct *gdt = (void *)desc->address; + + for (i = 0; i < (desc->size+1)/8; i++) + kvm_hypercall3(LHCALL...

...E); - paravirt_ops.name = "lguest"; - paravirt_ops.paravirt_enabled = 1; - paravirt_ops.kernel_rpl = 1; - - paravirt_ops.save_fl = save_fl; - paravirt_ops.restore_fl = restore_fl; - paravirt_ops.irq_disable = irq_disable; - paravirt_ops.irq_enable = irq_enable; - paravirt_ops.load_gdt = lguest_load_gdt; - paravirt_ops.memory_setup = lguest_memory_setup; - paravirt_ops.cpuid = lguest_cpuid; - paravirt_ops.write_cr3 = lguest_write_cr3; - paravirt_ops.flush_tlb_user = lguest_flush_tlb_user; - paravirt_ops.flush_tlb_single = lguest_flush_tlb_single; - paravirt_ops.flush_tlb_kernel = lguest_flush_tlb_...

...E); - paravirt_ops.name = "lguest"; - paravirt_ops.paravirt_enabled = 1; - paravirt_ops.kernel_rpl = 1; - - paravirt_ops.save_fl = save_fl; - paravirt_ops.restore_fl = restore_fl; - paravirt_ops.irq_disable = irq_disable; - paravirt_ops.irq_enable = irq_enable; - paravirt_ops.load_gdt = lguest_load_gdt; - paravirt_ops.memory_setup = lguest_memory_setup; - paravirt_ops.cpuid = lguest_cpuid; - paravirt_ops.write_cr3 = lguest_write_cr3; - paravirt_ops.flush_tlb_user = lguest_flush_tlb_user; - paravirt_ops.flush_tlb_single = lguest_flush_tlb_single; - paravirt_ops.flush_tlb_kernel = lguest_flush_tlb_...

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

Hi Linus, Here's a set of patches to update paravirt_ops and Xen for 2.6.24 A quick overview of the patchset: paravirt_ops: Remove the monolithic paravirt_ops structure, and replace it with smaller structures of related functions. Also, clean up the handling of lazy mode to make it easier to implement. x86/mm/init.c: remove a chunk of dead code Xen: - remove duplicate includes -

Hi Linus, Here's a set of patches to update paravirt_ops and Xen for 2.6.24 A quick overview of the patchset: paravirt_ops: Remove the monolithic paravirt_ops structure, and replace it with smaller structures of related functions. Also, clean up the handling of lazy mode to make it easier to implement. x86/mm/init.c: remove a chunk of dead code Xen: - remove duplicate includes -

Hi Linus, Here's a set of patches to update paravirt_ops and Xen for 2.6.24 A quick overview of the patchset: paravirt_ops: Remove the monolithic paravirt_ops structure, and replace it with smaller structures of related functions. Also, clean up the handling of lazy mode to make it easier to implement. x86/mm/init.c: remove a chunk of dead code Xen: - remove duplicate includes -

...upt pending... */ + lguest_data.irq_enabled = flags; +} + +static void irq_disable(void) +{ + lguest_data.irq_enabled = 0; +} + +static void irq_enable(void) +{ + /* Linux i386 code expects bit 9 set. */ + /* FIXME: Check if interrupt pending... */ + lguest_data.irq_enabled = 512; +} + +static void lguest_load_gdt(const struct desc_ptr *desc) +{ + /* Does nothing. HV should have done everything for us */ +} + +static void lguest_load_idt(const struct desc_ptr *desc) +{ + unsigned int i; + struct gate_struct *idt = (void *)desc->address; + + for (i = 0; i < (desc->size+1)/16; i++) { + hcall(LHCALL_L...

...upt pending... */ + lguest_data.irq_enabled = flags; +} + +static void irq_disable(void) +{ + lguest_data.irq_enabled = 0; +} + +static void irq_enable(void) +{ + /* Linux i386 code expects bit 9 set. */ + /* FIXME: Check if interrupt pending... */ + lguest_data.irq_enabled = 512; +} + +static void lguest_load_gdt(const struct desc_ptr *desc) +{ + /* Does nothing. HV should have done everything for us */ +} + +static void lguest_load_idt(const struct desc_ptr *desc) +{ + unsigned int i; + struct gate_struct *idt = (void *)desc->address; + + for (i = 0; i < (desc->size+1)/16; i++) { + hcall(LHCALL_L...

The netfilter code had very good documentation: the Netfilter Hacking HOWTO. Noone ever read it. So this time I'm trying something different, using a bit of Knuthiness. Start with drivers/lguest/README. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- Documentation/lguest/extract | 58 +++++++++++++++++++++++++++++++++ Documentation/lguest/lguest.c | 9

The netfilter code had very good documentation: the Netfilter Hacking HOWTO. Noone ever read it. So this time I'm trying something different, using a bit of Knuthiness. Start with drivers/lguest/README. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- Documentation/lguest/extract | 58 +++++++++++++++++++++++++++++++++ Documentation/lguest/lguest.c | 9

The netfilter code had very good documentation: the Netfilter Hacking HOWTO. Noone ever read it. So this time I'm trying something different, using a bit of Knuthiness. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> --- Documentation/lguest/extract | 58 +++++++++++++++++++++++++++++++++ Documentation/lguest/lguest.c | 9 +++-- drivers/lguest/Makefile