search for: 548d25f

..._cpu_ops { void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t); void (*set_iopl_mask)(unsigned mask); +#define INIT_SET_IOPL_MASK(f) .set_iopl_mask = f, void (*wbinvd)(void); void (*io_delay)(void); diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 548d25f..e7969d4 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -383,7 +383,7 @@ __visible struct pv_cpu_ops pv_cpu_ops = { .iret = native_iret, .swapgs = native_swapgs, - .set_iopl_mask = native_set_iopl_mask, + INIT_SET_IOPL_MASK(native_set_iopl_mask) .io_delay = nati...

..._cpu_ops { void (*load_sp0)(struct tss_struct *tss, struct thread_struct *t); void (*set_iopl_mask)(unsigned mask); +#define INIT_SET_IOPL_MASK(f) .set_iopl_mask = f, void (*wbinvd)(void); void (*io_delay)(void); diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 548d25f..e7969d4 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -383,7 +383,7 @@ __visible struct pv_cpu_ops pv_cpu_ops = { .iret = native_iret, .swapgs = native_swapgs, - .set_iopl_mask = native_set_iopl_mask, + INIT_SET_IOPL_MASK(native_set_iopl_mask) .io_delay = nati...

This patch series makes it possible to compile out the userspace IO system calls, iopl and ioperm. The first patch does some 32/64 unification in copy_thread to make subsequent changes easier. The second patch simplifies the complex calculation of the TSS segment limit, which also makes it easier to change in the last patch. Patches 3-9 introduce helpers to make it easier to compile out IO.

This patch series makes it possible to compile out the userspace IO system calls, iopl and ioperm. The first patch does some 32/64 unification in copy_thread to make subsequent changes easier. The second patch simplifies the complex calculation of the TSS segment limit, which also makes it easier to change in the last patch. Patches 3-9 introduce helpers to make it easier to compile out IO.

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

...gt; - FORK_LIKE vfork > FIXED_FRAME stub_iopl, sys_iopl > +#endif /* CONFIG_X86_IOPORT */ > > ENTRY(ptregscall_common) > DEFAULT_FRAME 1 8 /* offset 8: return address */ > diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c > index 548d25f..e7969d4 100644 > --- a/arch/x86/kernel/paravirt.c > +++ b/arch/x86/kernel/paravirt.c > @@ -383,7 +383,7 @@ __visible struct pv_cpu_ops pv_cpu_ops = { > .iret = native_iret, > .swapgs = native_swapgs, > > - .set_iopl_mask = native_set_iopl_mask, > +...

...END(\label) .endm - FORK_LIKE clone - FORK_LIKE fork - FORK_LIKE vfork FIXED_FRAME stub_iopl, sys_iopl +#endif /* CONFIG_X86_IOPORT */ ENTRY(ptregscall_common) DEFAULT_FRAME 1 8 /* offset 8: return address */ diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 548d25f..e7969d4 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -383,7 +383,7 @@ __visible struct pv_cpu_ops pv_cpu_ops = { .iret = native_iret, .swapgs = native_swapgs, - .set_iopl_mask = native_set_iopl_mask, + INIT_SET_IOPL_MASK(native_set_iopl_mask) .io_delay = nati...

...END(\label) .endm - FORK_LIKE clone - FORK_LIKE fork - FORK_LIKE vfork FIXED_FRAME stub_iopl, sys_iopl +#endif /* CONFIG_X86_IOPORT */ ENTRY(ptregscall_common) DEFAULT_FRAME 1 8 /* offset 8: return address */ diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c index 548d25f..e7969d4 100644 --- a/arch/x86/kernel/paravirt.c +++ b/arch/x86/kernel/paravirt.c @@ -383,7 +383,7 @@ __visible struct pv_cpu_ops pv_cpu_ops = { .iret = native_iret, .swapgs = native_swapgs, - .set_iopl_mask = native_set_iopl_mask, + INIT_SET_IOPL_MASK(native_set_iopl_mask) .io_delay = nati...