search for: esp0

The current code simply calls "start_kernel" directly if we're under a hypervisor and no paravirt_ops backend wants us, because paravirt.c registers that as a backend. This was always a vain hope; start_kernel won't get far without setup. It's also impossible for paravirt_ops backends which don't sit in the arch/i386/kernel directory: they can't link before

The current code simply calls "start_kernel" directly if we're under a hypervisor and no paravirt_ops backend wants us, because paravirt.c registers that as a backend. This was always a vain hope; start_kernel won't get far without setup. It's also impossible for paravirt_ops backends which don't sit in the arch/i386/kernel directory: they can't link before

...eived wisdom on how to set this up, and is the use of the gif interface indeed necessary? I also remember that the discussions diverted into a problem with ipfw when gif was *not* used, but I haven't found any messages to indicate that it was resolved. I recall suggestions that a new interface esp0 be created so that ipfw could work correctly on both the innner and outer packets of an ESP tunnel. Was that issue ever resolved? jim hatfield

...eax, ebx, ecx, edx; - - cpuid(op, &eax, &ebx, &ecx, &edx); - return edx; -} - #define load_cr3(pgdir) write_cr3(__pa(pgdir)) /* @@ -505,18 +445,6 @@ struct thread_struct { .io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \ } -#ifndef CONFIG_PARAVIRT -static inline void load_esp0(struct tss_struct *tss, struct thread_struct *thread) -{ - tss->esp0 = thread->esp0; - /* This can only happen when SEP is enabled, no need to test "SEP"arately */ - if (unlikely(tss->ss1 != thread->sysenter_cs)) { - tss->ss1 = thread->sysenter_cs; - wrmsr(MSR_IA32_SYS...

...eax, ebx, ecx, edx; - - cpuid(op, &eax, &ebx, &ecx, &edx); - return edx; -} - #define load_cr3(pgdir) write_cr3(__pa(pgdir)) /* @@ -505,18 +445,6 @@ struct thread_struct { .io_bitmap = { [ 0 ... IO_BITMAP_LONGS] = ~0 }, \ } -#ifndef CONFIG_PARAVIRT -static inline void load_esp0(struct tss_struct *tss, struct thread_struct *thread) -{ - tss->esp0 = thread->esp0; - /* This can only happen when SEP is enabled, no need to test "SEP"arately */ - if (unlikely(tss->ss1 != thread->sysenter_cs)) { - tss->ss1 = thread->sysenter_cs; - wrmsr(MSR_IA32_SYS...

...FPU save and restore */ #define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */ +#include <mach_processor.h> + /* * Save the cr4 feature set we're using (ie * Pentium 4MB enable and PPro Global page @@ -489,6 +418,7 @@ struct thread_struct { static inline void load_esp0(struct tss_struct *tss, struct thread_struct *thread) { tss->esp0 = thread->esp0; + arch_update_kernel_stack(tss, thread->esp0); /* This can only happen when SEP is enabled, no need to test "SEP"arately */ if (unlikely(tss->ss1 != thread->sysenter_cs)) { tss->s...

...FPU save and restore */ #define X86_CR4_OSXMMEXCPT 0x0400 /* enable unmasked SSE exceptions */ +#include <mach_processor.h> + /* * Save the cr4 feature set we're using (ie * Pentium 4MB enable and PPro Global page @@ -489,6 +418,7 @@ struct thread_struct { static inline void load_esp0(struct tss_struct *tss, struct thread_struct *thread) { tss->esp0 = thread->esp0; + arch_update_kernel_stack(tss, thread->esp0); /* This can only happen when SEP is enabled, no need to test "SEP"arately */ if (unlikely(tss->ss1 != thread->sysenter_cs)) { tss->s...

...t'' has no member named ''eip'' arch/i386/kernel/asm-offsets.c:42: error: ''struct cpuinfo_x86'' has no member named ''hard_math'' arch/i386/kernel/asm-offsets.c:67: error: ''struct tss_struct'' has no member named ''esp0'' arch/i386/kernel/asm-offsets.c:71: error: ''FIX_VSYSCALL'' undeclared (first use in this function) arch/i386/kernel/asm-offsets.c:71: error: (Each undeclared identifier is reported only once arch/i386/kernel/asm-offsets.c:71: error: for each function it appears in.) make...

...t'' has no member named ''eip'' arch/i386/kernel/asm-offsets.c:42: error: ''struct cpuinfo_x86'' has no member named ''hard_math'' arch/i386/kernel/asm-offsets.c:67: error: ''struct tss_struct'' has no member named ''esp0'' arch/i386/kernel/asm-offsets.c:71: error: ''FIX_VSYSCALL'' undeclared (first use in this function) arch/i386/kernel/asm-offsets.c:71: error: (Each undeclared identifier is reported only once arch/i386/kernel/asm-offsets.c:71: error: for each function it appears in.) make...

OK, not strictly in keeping with the subject of the patch set but I needed this to build ;-) Should be merged into 02d-xen-apic-esp0.patch Signed-off-by: Ian Campbell <ian.campbell@xensource.com> diff -r 6fdbec59813e arch/i386/paravirt-xen/enlighten.c --- a/arch/i386/paravirt-xen/enlighten.c Wed Aug 23 15:08:37 2006 +0100 +++ b/arch/i386/paravirt-xen/enlighten.c Wed Aug 23 15:08:37 2006 +0100 @@ -310,6 +310,7 @@ static f...

...+static int disable_sep; +static int disable_tsc; +static int disable_mtrr; + +/* Cached VMI operations */ +struct { + void (fastcall *cpuid)(void /* non-c */); + void (fastcall *_set_ldt)(u32 selector); + void (fastcall *set_tr)(u32 selector); + void (fastcall *set_kernel_stack)(u32 selector, u32 esp0); + void (fastcall *allocate_page)(u32, u32, u32, u32, u32); + void (fastcall *release_page)(u32, u32); + void (fastcall *set_pte)(pte_t, pte_t *, unsigned); + void (fastcall *update_pte)(pte_t *, unsigned); + void (fastcall *set_linear_mapping)(int, u32, u32, u32); + void (fastcall *flush_tlb)(int...

...+static int disable_sep; +static int disable_tsc; +static int disable_mtrr; + +/* Cached VMI operations */ +struct { + void (fastcall *cpuid)(void /* non-c */); + void (fastcall *_set_ldt)(u32 selector); + void (fastcall *set_tr)(u32 selector); + void (fastcall *set_kernel_stack)(u32 selector, u32 esp0); + void (fastcall *allocate_page)(u32, u32, u32, u32, u32); + void (fastcall *release_page)(u32, u32); + void (fastcall *set_pte)(pte_t, pte_t *, unsigned); + void (fastcall *update_pte)(pte_t *, unsigned); + void (fastcall *set_linear_mapping)(int, u32, u32, u32); + void (fastcall *flush_tlb)(int...

...+static int disable_sep; +static int disable_tsc; +static int disable_mtrr; + +/* Cached VMI operations */ +struct { + void (fastcall *cpuid)(void /* non-c */); + void (fastcall *_set_ldt)(u32 selector); + void (fastcall *set_tr)(u32 selector); + void (fastcall *set_kernel_stack)(u32 selector, u32 esp0); + void (fastcall *allocate_page)(u32, u32, u32, u32, u32); + void (fastcall *release_page)(u32, u32); + void (fastcall *set_pte)(pte_t, pte_t *, unsigned); + void (fastcall *update_pte)(pte_t *, unsigned); + void (fastcall *set_linear_mapping)(int, u32, u32, u32); + void (fastcall *flush_tlb)(int...

...+static int disable_sep; +static int disable_tsc; +static int disable_mtrr; + +/* Cached VMI operations */ +struct { + void (fastcall *cpuid)(void /* non-c */); + void (fastcall *_set_ldt)(u32 selector); + void (fastcall *set_tr)(u32 selector); + void (fastcall *set_kernel_stack)(u32 selector, u32 esp0); + void (fastcall *allocate_page)(u32, u32, u32, u32, u32); + void (fastcall *release_page)(u32, u32); + void (fastcall *set_pte)(pte_t, pte_t *, unsigned); + void (fastcall *update_pte)(pte_t *, unsigned); + void (fastcall *set_linear_mapping)(int, u32, u32, u32); + void (fastcall *flush_tlb)(int...

...p: pushl $(__USER_CS) CFI_ADJUST_CFA_OFFSET 4 /*CFI_REL_OFFSET cs, 0*/ -#ifndef CONFIG_COMPAT_VDSO /* * Push current_thread_info()->sysenter_return to the stack. * A tiny bit of offset fixup is necessary - 4*4 means the 4 words * pushed above; +8 corresponds to copy_thread's esp0 setting. */ pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp) -#else - pushl $SYSENTER_RETURN -#endif CFI_ADJUST_CFA_OFFSET 4 CFI_REL_OFFSET eip, 0 = Index: linux-2.6.21/arch/i386/kernel/sysenter.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D...

...p: pushl $(__USER_CS) CFI_ADJUST_CFA_OFFSET 4 /*CFI_REL_OFFSET cs, 0*/ -#ifndef CONFIG_COMPAT_VDSO /* * Push current_thread_info()->sysenter_return to the stack. * A tiny bit of offset fixup is necessary - 4*4 means the 4 words * pushed above; +8 corresponds to copy_thread's esp0 setting. */ pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp) -#else - pushl $SYSENTER_RETURN -#endif CFI_ADJUST_CFA_OFFSET 4 CFI_REL_OFFSET eip, 0 = Index: linux-2.6.21/arch/i386/kernel/sysenter.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D...

I implemented sysenter for 32-on-64, since it seemed straightforward enough. It mostly works, but every now and again I get vcpus just hanging in blocked state, as if events are being lost or ignored. Its very similar to the symptoms that other people have reported against the pvops kernel, which I have not managed to reproduce. Perhaps using sysenter is exacerbating an existing bug...

...84,8 +184,12 @@ sysenter_past_esp: pushl %ebp pushfl pushl $(__USER_CS) - pushl $SYSENTER_RETURN - + /* + * Push current_thread_info()->sysenter_return to the stack. + * A tiny bit of offset fixup is necessary - 4*4 means the 4 words + * pushed above; +8 corresponds to copy_thread's esp0 setting. + */ + pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp) /* * Load the potential sixth argument from user stack. * Careful about security. diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .23560-linux-2.6.17-rc4-git3/arch/i386/kernel/si...

...84,8 +184,12 @@ sysenter_past_esp: pushl %ebp pushfl pushl $(__USER_CS) - pushl $SYSENTER_RETURN - + /* + * Push current_thread_info()->sysenter_return to the stack. + * A tiny bit of offset fixup is necessary - 4*4 means the 4 words + * pushed above; +8 corresponds to copy_thread's esp0 setting. + */ + pushl (TI_sysenter_return-THREAD_SIZE+8+4*4)(%esp) /* * Load the potential sixth argument from user stack. * Careful about security. diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal .23560-linux-2.6.17-rc4-git3/arch/i386/kernel/si...

...: "=r" (cr4)); + cr0 = read_cr0(); + cr2 = read_cr2(); + cr3 = read_cr3(); + cr4 = read_cr4(); printk("FS: %016lx(%04x) GS:%016lx(%04x) knlGS:%016lx\n", fs,fsindex,gs,gsindex,shadowgs); @@ -578,7 +579,7 @@ __switch_to(struct task_struct *prev_p, /* * Reload esp0, LDT and the page table pointer: */ - tss->rsp0 = next->rsp0; + load_rsp0(tss, next); /* * Switch DS and ES. Index: clean-start/arch/x86_64/kernel/reboot.c =================================================================== --- clean-start.orig/arch/x86_64/kernel/reboot.c +++ clean...