search for: _set_gate

...================================================ --- linux-2.6.16-rc5.orig/arch/i386/kernel/traps.c 2006-03-10 12:55:09.000000000 -0800 +++ linux-2.6.16-rc5/arch/i386/kernel/traps.c 2006-03-10 16:01:06.000000000 -0800 @@ -1043,20 +1043,6 @@ void __init trap_init_f00f_bug(void) } #endif -#define _set_gate(gate_addr,type,dpl,addr,seg) \ -do { \ - int __d0, __d1; \ - __asm__ __volatile__ ("movw %%dx,%%ax\n\t" \ - "movw %4,%%dx\n\t" \ - "movl %%eax,%0\n\t" \ - "movl %%edx,%1" \ - :"=m" (*((long *) (gate_addr))), \ - "=m" (*(1+(long *) (gate...

...================================================ --- linux-2.6.16-rc5.orig/arch/i386/kernel/traps.c 2006-03-10 12:55:09.000000000 -0800 +++ linux-2.6.16-rc5/arch/i386/kernel/traps.c 2006-03-10 16:01:06.000000000 -0800 @@ -1043,20 +1043,6 @@ void __init trap_init_f00f_bug(void) } #endif -#define _set_gate(gate_addr,type,dpl,addr,seg) \ -do { \ - int __d0, __d1; \ - __asm__ __volatile__ ("movw %%dx,%%ax\n\t" \ - "movw %4,%%dx\n\t" \ - "movl %%eax,%0\n\t" \ - "movl %%edx,%1" \ - :"=m" (*((long *) (gate_addr))), \ - "=m" (*(1+(long *) (gate...

(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>

...t as I can see, the xen architecture allows only DomU kernel to raise a hypercall. I am planning to enable application to communicate with xen directly. I am assuming, setting up a trap gate with Ring-3 access should do the trick. I have few questions regarding this. Is my idea feasible? ==> ( _set_gate(idt_table+HYPERCALL_VECTOR, 15, 3, &hypercall); ) Are there any security/performance/functional implications with this approach? Thanks and regards, SDK. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

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.

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

...write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) -#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) -#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) - #define set_ldt native_set_ldt #endif /* CONFIG_PARAVIRT */ -static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg) -{ - __u32 a, b; - pack_gate(&a, &b, (unsigned long)addr, seg, type, 0); - write_idt_entry(idt_table, gate, a, b); -} - -static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr) -{ - __u32 a, b; -...

...write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) -#define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) -#define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) - #define set_ldt native_set_ldt #endif /* CONFIG_PARAVIRT */ -static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg) -{ - __u32 a, b; - pack_gate(&a, &b, (unsigned long)addr, seg, type, 0); - write_idt_entry(idt_table, gate, a, b); -} - -static inline void __set_tss_desc(unsigned int cpu, unsigned int entry, const void *addr) -{ - __u32 a, b; -...

...process will get unless we need @@ -28,8 +27,6 @@ extern struct desc_struct default_ldt[]; extern struct gate_struct idt_table[]; extern struct desc_ptr cpu_gdt_descr[]; -/* the cpu gdt accessor */ -#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist) { @@ -115,7 +112,35 @@ static inline void set_seg_base(unsigned d->base0 = addr & 0xffff; d->base1 = (addr >> 16) & 0xff; d->base2 = (addr >> 24) & 0xff; -} +} + +static inline void...

...process will get unless we need @@ -28,8 +27,6 @@ extern struct desc_struct default_ldt[]; extern struct gate_struct idt_table[]; extern struct desc_ptr cpu_gdt_descr[]; -/* the cpu gdt accessor */ -#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist) { @@ -115,7 +112,35 @@ static inline void set_seg_base(unsigned d->base0 = addr & 0xffff; d->base1 = (addr >> 16) & 0xff; d->base2 = (addr >> 24) & 0xff; -} +} + +static inline void...

...ode side. And adds three new IDT entry helper routines: * _write_gate_lower This is a substitute for using cmpxchg16b to update a 128bit structure at once. It assumes that the top 64 bits are unchanged (and ASSERT()s the fact) and performs a regular write on the lower 64 bits. * _set_gate_lower This is functionally equivalent to the already present _set_gate(), except it uses _write_gate_lower rather than updating both 64bit values. * _update_gate_addr_lower This is designed to update an IDT entry handler only, without altering any other settings in the entry....

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths

...oid write_dt_entry(void * #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) #define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) +#endif /* CONFIG_PARAVIRT */ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg) { =================================================================== --- a/include/asm-i386/irqflags.h +++ b/include/asm-i386/irqflags.h @@ -10,6 +10,9 @@ #ifndef _ASM_IRQFLAGS_H #define _ASM_IRQFLAGS_H +#ifdef CONFIG_PARAVIRT +#inc...

...oid write_dt_entry(void * #define write_ldt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) #define write_gdt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) #define write_idt_entry(dt, entry, a, b) write_dt_entry(dt, entry, a, b) +#endif /* CONFIG_PARAVIRT */ static inline void _set_gate(int gate, unsigned int type, void *addr, unsigned short seg) { =================================================================== --- a/include/asm-i386/irqflags.h +++ b/include/asm-i386/irqflags.h @@ -10,6 +10,9 @@ #ifndef _ASM_IRQFLAGS_H #define _ASM_IRQFLAGS_H +#ifdef CONFIG_PARAVIRT +#inc...

Unlike full virtualization in which the virtual machine provides the same platform interface as running natively on the hardware, paravirtualization requires modification to the guest operating system to work with the platform interface provided by the hypervisor. Xen was designed with performance in mind. Calls to the hypervisor are minimized, batched if necessary, and non-critical codepaths

...process will get unless we need @@ -28,8 +27,6 @@ extern struct desc_struct default_ldt[]; extern struct gate_struct idt_table[]; extern struct desc_ptr cpu_gdt_descr[]; -/* the cpu gdt accessor */ -#define cpu_gdt(_cpu) ((struct desc_struct *)cpu_gdt_descr[_cpu].address) static inline void _set_gate(void *adr, unsigned type, unsigned long func, unsigned dpl, unsigned ist) { @@ -115,7 +112,19 @@ static inline void set_seg_base(unsigned d->base0 = addr & 0xffff; d->base1 = (addr >> 16) & 0xff; d->base2 = (addr >> 24) & 0xff; -} +} + +#ifdef CONFIG_PARAV...