search for: set_iopl_mask

This will allow making set_iopl_mask optional later. Signed-off-by: Josh Triplett <josh at joshtriplett.org> --- arch/x86/include/asm/paravirt_types.h | 1 + arch/x86/kernel/paravirt.c | 2 +- arch/x86/xen/enlighten.c | 4 ++-- 3 files changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/x86/incl...

This will allow making set_iopl_mask optional later. Signed-off-by: Josh Triplett <josh at joshtriplett.org> --- arch/x86/include/asm/paravirt_types.h | 1 + arch/x86/kernel/paravirt.c | 2 +- arch/x86/xen/enlighten.c | 4 ++-- 3 files changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/x86/incl...

...es after each patch. Josh Triplett (10): x86: process: Unify 32-bit and 64-bit copy_thread I/O bitmap handling x86: tss: Eliminate fragile calculation of TSS segment limit x86: processor.h: Introduce macros to initialize IO fields of thread and TSS x86: paravirt: Wrap initialization of set_iopl_mask in a macro x86: cpu: Add helper function unifying 32-bit and 64-bit IO init in cpu_init x86: process: Introduce helper to clear a thread's IO bitmap x86: process: Introduce helper to switch iopl mask x86: process: Introduce helper for IO-related bits of exit_thread x86: process: I...

...es after each patch. Josh Triplett (10): x86: process: Unify 32-bit and 64-bit copy_thread I/O bitmap handling x86: tss: Eliminate fragile calculation of TSS segment limit x86: processor.h: Introduce macros to initialize IO fields of thread and TSS x86: paravirt: Wrap initialization of set_iopl_mask in a macro x86: cpu: Add helper function unifying 32-bit and 64-bit IO init in cpu_init x86: process: Introduce helper to clear a thread's IO bitmap x86: process: Introduce helper to switch iopl mask x86: process: Introduce helper for IO-related bits of exit_thread x86: process: I...

The 32-bit and 64-bit versions of copy_thread have functionally identical handling for copying the I/O bitmap, modulo differences in error handling. Clean up the error paths in both by moving the copy of the I/O bitmap to the end, to eliminate the need to free it if subsequent copy steps fail; move the resulting identical code to a static inline in a common header. Signed-off-by: Josh Triplett

The 32-bit and 64-bit versions of copy_thread have functionally identical handling for copying the I/O bitmap, modulo differences in error handling. Clean up the error paths in both by moving the copy of the I/O bitmap to the end, to eliminate the need to free it if subsequent copy steps fail; move the resulting identical code to a static inline in a common header. Signed-off-by: Josh Triplett

...perm 240 - -240 init_tss 8576 384 -8192 Signed-off-by: Josh Triplett <josh at joshtriplett.org> --- v3: Eliminated several #ifdefs, and in particular almost all #ifdefs in .c files, by adding a macro INIT_SET_IOPL_MASK to use in place of the initializer for set_iopl_mask, and using __maybe_unused rather than wrapping function definitions in #ifdef. Rebased on v3.18-rc1. Recomputed bloat-o-meter. I assume this should go through the x86 tree rather than the tiny tree. arch/x86/Kconfig...

...perm 240 - -240 init_tss 8576 384 -8192 Signed-off-by: Josh Triplett <josh at joshtriplett.org> --- v3: Eliminated several #ifdefs, and in particular almost all #ifdefs in .c files, by adding a macro INIT_SET_IOPL_MASK to use in place of the initializer for set_iopl_mask, and using __maybe_unused rather than wrapping function definitions in #ifdef. Rebased on v3.18-rc1. Recomputed bloat-o-meter. I assume this should go through the x86 tree rather than the tiny tree. arch/x86/Kconfig...

...240 - -240 > init_tss 8576 384 -8192 > > Signed-off-by: Josh Triplett <josh at joshtriplett.org> > --- > v3: Eliminated several #ifdefs, and in particular almost all #ifdefs in > .c files, by adding a macro INIT_SET_IOPL_MASK to use in place of > the initializer for set_iopl_mask, and using __maybe_unused rather > than wrapping function definitions in #ifdef. Rebased on v3.18-rc1. > Recomputed bloat-o-meter. > > I assume this should go through the x86 tree rather than the tiny tree. > >...

...t. Signed-off-by: Zachary Amsden <zach@vmware.com> diff -r 135d1b73c878 arch/i386/kernel/paravirt.c --- a/arch/i386/kernel/paravirt.c Tue Feb 27 16:23:56 2007 -0800 +++ b/arch/i386/kernel/paravirt.c Tue Feb 27 16:25:26 2007 -0800 @@ -538,7 +538,6 @@ struct paravirt_ops paravirt_ops = { .set_iopl_mask = native_set_iopl_mask, .io_delay = native_io_delay, - .const_udelay = __const_udelay, #ifdef CONFIG_X86_LOCAL_APIC .apic_write = native_apic_write, diff -r 135d1b73c878 arch/i386/kernel/smpboot.c --- a/arch/i386/kernel/smpboot.c Tue Feb 27 16:23:56 2007 -0800 +++ b/arch/i386/kernel/smpboot....

...t. Signed-off-by: Zachary Amsden <zach@vmware.com> diff -r 135d1b73c878 arch/i386/kernel/paravirt.c --- a/arch/i386/kernel/paravirt.c Tue Feb 27 16:23:56 2007 -0800 +++ b/arch/i386/kernel/paravirt.c Tue Feb 27 16:25:26 2007 -0800 @@ -538,7 +538,6 @@ struct paravirt_ops paravirt_ops = { .set_iopl_mask = native_set_iopl_mask, .io_delay = native_io_delay, - .const_udelay = __const_udelay, #ifdef CONFIG_X86_LOCAL_APIC .apic_write = native_apic_write, diff -r 135d1b73c878 arch/i386/kernel/smpboot.c --- a/arch/i386/kernel/smpboot.c Tue Feb 27 16:23:56 2007 -0800 +++ b/arch/i386/kernel/smpboot....

...06d5 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -299,10 +299,12 @@ static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) { PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g); } +#ifdef CONFIG_X86_IOPORT static inline void set_iopl_mask(unsigned mask) { PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask); } +#endif /* CONFIG_X86_IOPORT */ /* The paravirtualized I/O functions */ static inline void slow_down_io(void) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index aab8f67..bc5bfeb 100...

...2ec8 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -299,10 +299,12 @@ static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) { PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g); } +#ifdef CONFIG_X86_IOPORT static inline void set_iopl_mask(unsigned mask) { PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask); } +#endif /* CONFIG_X86_IOPORT */ /* The paravirtualized I/O functions */ static inline void slow_down_io(void) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 7549b8b..8b51bd1 100...

...ravirt.h > +++ b/arch/x86/include/asm/paravirt.h > @@ -299,10 +299,12 @@ static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) > { > PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g); > } > +#ifdef CONFIG_X86_IOPORT > static inline void set_iopl_mask(unsigned mask) > { > PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask); > } > +#endif /* CONFIG_X86_IOPORT */ > > /* The paravirtualized I/O functions */ > static inline void slow_down_io(void) > diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm...

...ravirt.h > +++ b/arch/x86/include/asm/paravirt.h > @@ -299,10 +299,12 @@ static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) > { > PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g); > } > +#ifdef CONFIG_X86_IOPORT > static inline void set_iopl_mask(unsigned mask) > { > PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask); > } > +#endif /* CONFIG_X86_IOPORT */ > > /* The paravirtualized I/O functions */ > static inline void slow_down_io(void) > diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm...

...asm/paravirt.h > +++ b/arch/x86/include/asm/paravirt.h > @@ -299,10 +299,12 @@ static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) > { > PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g); > } > +#ifdef CONFIG_X86_IOPORT > static inline void set_iopl_mask(unsigned mask) > { > PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask); > } > +#endif /* CONFIG_X86_IOPORT */ > > /* The paravirtualized I/O functions */ > static inline void slow_down_io(void) > diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/par...

...asm/paravirt.h > +++ b/arch/x86/include/asm/paravirt.h > @@ -299,10 +299,12 @@ static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) > { > PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g); > } > +#ifdef CONFIG_X86_IOPORT > static inline void set_iopl_mask(unsigned mask) > { > PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask); > } > +#endif /* CONFIG_X86_IOPORT */ > > /* The paravirtualized I/O functions */ > static inline void slow_down_io(void) > diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/par...

This patch series makes it possible to compile out the iopl and ioperm system calls, which allow privileged processes to request permission to directly poke I/O ports from userspace. Nothing on a modern Linux system uses these calls anymore, and anything new should be using /dev/port instead, or better yet writing a driver. Copying the bloat-o-meter stats from the final patch: 32-bit

This patch series makes it possible to compile out the iopl and ioperm system calls, which allow privileged processes to request permission to directly poke I/O ports from userspace. Nothing on a modern Linux system uses these calls anymore, and anything new should be using /dev/port instead, or better yet writing a driver. Copying the bloat-o-meter stats from the final patch: 32-bit

...2ec8 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -299,10 +299,12 @@ static inline void write_idt_entry(gate_desc *dt, int entry, const gate_desc *g) { PVOP_VCALL3(pv_cpu_ops.write_idt_entry, dt, entry, g); } +#ifdef CONFIG_X86_IOPORT static inline void set_iopl_mask(unsigned mask) { PVOP_VCALL1(pv_cpu_ops.set_iopl_mask, mask); } +#endif /* CONFIG_X86_IOPORT */ /* The paravirtualized I/O functions */ static inline void slow_down_io(void) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 3caf2a8..a22a5d4 100...