search for: config_ia32_emul

Hi guys, Maybe one of you quickly can tell me if the x86_64 kernel configuration option CONFIG_IA32_EMULATION is supposed to work under Xen? I''ve used an ia32 root file system together with CONFIG_IA32_EMULATION inside qemu-system-x86_64 for quite a while now (without xen). It works pretty well. However, when I try this with xen-unstable-9514 all I get is general protection errors... [snip...

...ible with KNC. So, even if you'd succeed to compile them somehow, they may fail to run (illegal instruction). There are two possible solutions I know of. First one - use KNC in 32-bit mode. KNC can run any 32-bit binary, if 32-bit C runtime is provided and device Linux kernel is compiled with CONFIG_IA32_EMULATION=y. This will not allow to use KNC's vector units, so it will be worth only for massive multi-threading. You do not loose much, because even if k1om-ready LLVM backend would exist, I doubt it could optimize for vector arithmetics well enough without man-year of testing/tuning the exiting ve...

Hi, in the past few weeks we were able to confirm that the LLVM's JIT compiler can be used for our research project. This was confirmed for x86-64 architecture (with very good performance results by the way). Now, one of our real target architecture is the Intel Xeon Phi (KNC) accelerator in a native execution model. When cross-compiling LLVM (3.4 RC1) for Xeon Phi with CMake following

...s.c +++ work-nopv/arch/x86_64/kernel/asm-offsets.c @@ -48,6 +48,9 @@ int main(void) ENTRY(cpunumber); ENTRY(irqstackptr); ENTRY(data_offset); + /* XXX: this should probably be a paravirt_ops stub, to be filled in + * with the hypervisor code */ + ENTRY(vcpu); BLANK(); #undef ENTRY #ifdef CONFIG_IA32_EMULATION Index: clean-start/include/asm-x86_64/pda.h =================================================================== --- clean-start.orig/include/asm-x86_64/pda.h +++ clean-start/include/asm-x86_64/pda.h @@ -29,6 +29,7 @@ struct x8664_pda { short isidle; struct mm_struct *active_mm; unsigned...

...s.c +++ work-nopv/arch/x86_64/kernel/asm-offsets.c @@ -48,6 +48,9 @@ int main(void) ENTRY(cpunumber); ENTRY(irqstackptr); ENTRY(data_offset); + /* XXX: this should probably be a paravirt_ops stub, to be filled in + * with the hypervisor code */ + ENTRY(vcpu); BLANK(); #undef ENTRY #ifdef CONFIG_IA32_EMULATION Index: clean-start/include/asm-x86_64/pda.h =================================================================== --- clean-start.orig/include/asm-x86_64/pda.h +++ clean-start/include/asm-x86_64/pda.h @@ -29,6 +29,7 @@ struct x8664_pda { short isidle; struct mm_struct *active_mm; unsigned...

..., - IO_BITMAP_BYTES, GFP_KERNEL); - if (!p->thread.io_bitmap_ptr) { - p->thread.io_bitmap_max = 0; - return -ENOMEM; - } - set_tsk_thread_flag(p, TIF_IO_BITMAP); - } - /* * Set a new TLS for the child thread? */ if (clone_flags & CLONE_SETTLS) { + int err; #ifdef CONFIG_IA32_EMULATION if (test_thread_flag(TIF_IA32)) err = do_set_thread_area(p, -1, @@ -217,16 +207,10 @@ int copy_thread(unsigned long clone_flags, unsigned long sp, #endif err = do_arch_prctl(p, ARCH_SET_FS, childregs->r8); if (err) - goto out; - } - err = 0; -out: - if (err && p-&gt...

Hello, To compile a custom kernel, I downloaded 2.6.29.1 from kernel.org and followed the tutorial at: http://wiki.xensource.com/xenwiki/Kernel.org_Linux_on_Xen Used a supposedly working .config file for the compilation (generated by my provider to compile his xenU kernels), set /dev/xvd* device nodes both in the domU conf file (disk, root): disk = [

...ntry.S */ extern void native_iret(void); -extern void native_usergs_sysret32(void); extern void native_usergs_sysret64(void); static struct resource reserve_ioports = { @@ -376,9 +374,6 @@ __visible struct pv_cpu_ops pv_cpu_ops = { .load_sp0 = native_load_sp0, #ifdef CONFIG_X86_64 -#ifdef CONFIG_IA32_EMULATION - .usergs_sysret32 = native_usergs_sysret32, -#endif .usergs_sysret64 = native_usergs_sysret64, #endif .iret = native_iret, diff --git a/arch/x86/kernel/paravirt_patch_64.c b/arch/x86/kernel/paravirt_patch_64.c index 17c00f8..e70087a 100644 --- a/arch/x86/kernel/paravirt_patch_64.c +++ b/...

Hi, This small series provides some more fixes towards the goal to have the PARAVIRT selectable for x86_64. After that, just some more small steps are needed. The first fix is not even specific for PARAVIRT, and it's actually preventing the whole tree from booting.

Hi, This small series provides some more fixes towards the goal to have the PARAVIRT selectable for x86_64. After that, just some more small steps are needed. The first fix is not even specific for PARAVIRT, and it's actually preventing the whole tree from booting.

...tion will cause a #VC + * exception to be raised. The #VC exception handler will send a + * NMI-complete message to the hypervisor to re-open the NMI + * window. + */ +sev_es_iret_kernel: + pushf + btsq $X86_EFLAGS_TF_BIT, (%rsp) + popf + iretq +SYM_CODE_END(sev_es_iret_user) +#endif + #ifndef CONFIG_IA32_EMULATION /* * This handles SYSCALL from 32-bit code. There is no way to program diff --git a/arch/x86/include/asm/sev-es.h b/arch/x86/include/asm/sev-es.h index a4d7574c5c6a..22f45782149e 100644 --- a/arch/x86/include/asm/sev-es.h +++ b/arch/x86/include/asm/sev-es.h @@ -8,6 +8,8 @@ #ifndef __ASM_E...

...extern void native_usergs_sysret32(void); extern void native_usergs_sysret64(void); @@ -385,9 +381,6 @@ __visible struct pv_cpu_ops pv_cpu_ops = .load_sp0 = native_load_sp0, -#if defined(CONFIG_X86_32) - .irq_enable_sysexit = native_irq_enable_sysexit, -#endif #ifdef CONFIG_X86_64 #ifdef CONFIG_IA32_EMULATION .usergs_sysret32 = native_usergs_sysret32, --- a/arch/x86/kernel/paravirt_patch_32.c +++ b/arch/x86/kernel/paravirt_patch_32.c @@ -5,7 +5,6 @@ DEF_NATIVE(pv_irq_ops, irq_enable, "sti" DEF_NATIVE(pv_irq_ops, restore_fl, "push %eax; popf"); DEF_NATIVE(pv_irq_ops, save_fl,...

...tern void native_usergs_sysret32(void); extern void native_usergs_sysret64(void); @@ -379,9 +375,6 @@ __visible struct pv_cpu_ops pv_cpu_ops = { .load_sp0 = native_load_sp0, -#if defined(CONFIG_X86_32) - .irq_enable_sysexit = native_irq_enable_sysexit, -#endif #ifdef CONFIG_X86_64 #ifdef CONFIG_IA32_EMULATION .usergs_sysret32 = native_usergs_sysret32, diff --git a/arch/x86/kernel/paravirt_patch_32.c b/arch/x86/kernel/paravirt_patch_32.c index c89f50a..158dc06 100644 --- a/arch/x86/kernel/paravirt_patch_32.c +++ b/arch/x86/kernel/paravirt_patch_32.c @@ -5,7 +5,6 @@ DEF_NATIVE(pv_irq_ops, irq_enabl...

The first patch fixes Xen PV regression introduced by 32-bit rewrite. Unlike the earlier version it uses ALTERNATIVE instruction and avoids using xen_sysexit (and sysret32 in compat mode) pv ops, as suggested by Andy. (I ended up patching TEST with XOR to avoid extra NOPs, even though I said yesterday it would be wrong. It's not wrong) As result of this patch irq_enable_sysexit and

The first patch fixes Xen PV regression introduced by 32-bit rewrite. Unlike the earlier version it uses ALTERNATIVE instruction and avoids using xen_sysexit (and sysret32 in compat mode) pv ops, as suggested by Andy. (I ended up patching TEST with XOR to avoid extra NOPs, even though I said yesterday it would be wrong. It's not wrong) As result of this patch irq_enable_sysexit and

...nel/idt.c index 135d208a2d38..e32cc5f3fa94 100644 --- a/arch/x86/kernel/idt.c +++ b/arch/x86/kernel/idt.c @@ -88,7 +88,6 @@ static const __initconst struct idt_data def_idts[] = { #ifdef CONFIG_X86_MCE INTG(X86_TRAP_MC, &machine_check), #endif - SYSG(X86_TRAP_OF, overflow), #if defined(CONFIG_IA32_EMULATION) SYSG(IA32_SYSCALL_VECTOR, entry_INT80_compat), @@ -185,6 +184,9 @@ static const __initconst struct idt_data ist_idts[] = { #ifdef CONFIG_X86_MCE ISTG(X86_TRAP_MC, &machine_check, IST_INDEX_MCE), #endif +#ifdef CONFIG_AMD_MEM_ENCRYPT + ISTG(X86_TRAP_VC, vmm_communication, IST_INDEX_V...

The first patch fixes Xen PV regression introduced by 32-bit rewrite. Unlike the earlier version it uses ALTERNATIVE instruction and avoids using xen_sysexit (and sysret32 in compat mode) pv ops, as suggested by Andy. As result of this patch irq_enable_sysexit and usergs_sysret32 pv ops are not used anymore by anyone and so can be removed. v2: * patch both TEST and JZ intructions with a

The first patch fixes Xen PV regression introduced by 32-bit rewrite. Unlike the earlier version it uses ALTERNATIVE instruction and avoids using xen_sysexit (and sysret32 in compat mode) pv ops, as suggested by Andy. As result of this patch irq_enable_sysexit and usergs_sysret32 pv ops are not used anymore by anyone and so can be removed. v2: * patch both TEST and JZ intructions with a

...extern void native_usergs_sysret32(void); extern void native_usergs_sysret64(void); @@ -385,9 +381,6 @@ __visible struct pv_cpu_ops pv_cpu_ops = .load_sp0 = native_load_sp0, -#if defined(CONFIG_X86_32) - .irq_enable_sysexit = native_irq_enable_sysexit, -#endif #ifdef CONFIG_X86_64 #ifdef CONFIG_IA32_EMULATION .usergs_sysret32 = native_usergs_sysret32, --- a/arch/x86/kernel/paravirt_patch_32.c +++ b/arch/x86/kernel/paravirt_patch_32.c @@ -5,7 +5,6 @@ DEF_NATIVE(pv_irq_ops, irq_enable, "sti" DEF_NATIVE(pv_irq_ops, restore_fl, "push %eax; popf"); DEF_NATIVE(pv_irq_ops, save_fl,...

...it strange symbiosis. @@ -160,7 +160,7 @@ void syscall_init(void) * but only a 32bit target. LSTAR sets the 64bit rip. */ wrmsrl(MSR_STAR, ((u64)__USER32_CS)<<48 | ((u64)__KERNEL_CS)<<32); - wrmsrl(MSR_LSTAR, system_call); + wrmsrl(MSR_LSTAR, (u64)system_call); #ifdef CONFIG_IA32_EMULATION syscall32_cpu_init (); @@ -170,6 +170,12 @@ void syscall_init(void) wrmsrl(MSR_SYSCALL_MASK, EF_TF|EF_DF|EF_IE|0x3000); } +/* Overriden in paravirt.c if CONFIG_PARAVIRT */ +void __attribute__((weak)) syscall_init(void) +{ + x86_64_syscall_init(); +} + void __cpuinit check_efer(vo...