Displaying 11 results from an estimated 11 matches for "native_zero".
2017 Nov 17
2
[PATCH 03/13] x86/paravirt: Convert native patch assembly code strings to macros
...entity_function
> >> +# define NATIVE_USERGS_SYSRET64 "swapgs; sysretq"
> >> +#else
> >> +# define _REG_ARG1 "%eax"
> >> +#endif
> >> +
> >> +#define _REG_RET "%" _ASM_AX
> >> +
> >> +#define NATIVE_ZERO "xor " _REG_ARG1 ", " _REG_ARG1
> >
> > NATIVE_ZERO_OUT
> >
> > I guess. NATIVE_ZERO reads like the native representation of 0 :-)
>
> NATIVE_ZERO_ARG1?
On a slight tangent, does anybody know why it zeros the arg?
The only place it's used...
2017 Nov 17
2
[PATCH 03/13] x86/paravirt: Convert native patch assembly code strings to macros
...entity_function
> >> +# define NATIVE_USERGS_SYSRET64 "swapgs; sysretq"
> >> +#else
> >> +# define _REG_ARG1 "%eax"
> >> +#endif
> >> +
> >> +#define _REG_RET "%" _ASM_AX
> >> +
> >> +#define NATIVE_ZERO "xor " _REG_ARG1 ", " _REG_ARG1
> >
> > NATIVE_ZERO_OUT
> >
> > I guess. NATIVE_ZERO reads like the native representation of 0 :-)
>
> NATIVE_ZERO_ARG1?
On a slight tangent, does anybody know why it zeros the arg?
The only place it's used...
2017 Nov 17
2
[PATCH 03/13] x86/paravirt: Convert native patch assembly code strings to macros
...ah, that "identity" looks strange. How about NATIVE_NOOP and
NATIVE_NOOP_32 ?
> +# define NATIVE_USERGS_SYSRET64 "swapgs; sysretq"
> +#else
> +# define _REG_ARG1 "%eax"
> +#endif
> +
> +#define _REG_RET "%" _ASM_AX
> +
> +#define NATIVE_ZERO "xor " _REG_ARG1 ", " _REG_ARG1
NATIVE_ZERO_OUT
I guess. NATIVE_ZERO reads like the native representation of 0 :-)
...
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
2017 Nov 17
2
[PATCH 03/13] x86/paravirt: Convert native patch assembly code strings to macros
...ah, that "identity" looks strange. How about NATIVE_NOOP and
NATIVE_NOOP_32 ?
> +# define NATIVE_USERGS_SYSRET64 "swapgs; sysretq"
> +#else
> +# define _REG_ARG1 "%eax"
> +#endif
> +
> +#define _REG_RET "%" _ASM_AX
> +
> +#define NATIVE_ZERO "xor " _REG_ARG1 ", " _REG_ARG1
NATIVE_ZERO_OUT
I guess. NATIVE_ZERO reads like the native representation of 0 :-)
...
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
2017 Nov 18
0
[PATCH 03/13] x86/paravirt: Convert native patch assembly code strings to macros
...;>> +# define NATIVE_USERGS_SYSRET64 "swapgs; sysretq"
>>>> +#else
>>>> +# define _REG_ARG1 "%eax"
>>>> +#endif
>>>> +
>>>> +#define _REG_RET "%" _ASM_AX
>>>> +
>>>> +#define NATIVE_ZERO "xor " _REG_ARG1 ", " _REG_ARG1
>>>
>>> NATIVE_ZERO_OUT
>>>
>>> I guess. NATIVE_ZERO reads like the native representation of 0 :-)
>>
>> NATIVE_ZERO_ARG1?
>
> On a slight tangent, does anybody know why it zeros the arg?
W...
2017 Oct 25
0
[PATCH 03/13] x86/paravirt: Convert native patch assembly code strings to macros
...EG_ARG1 "%rdi"
> +# define NATIVE_IDENTITY_32 "mov %edi, %eax"
> +# define NATIVE_USERGS_SYSRET64 "swapgs; sysretq"
> +#else
> +# define _REG_ARG1 "%eax"
> +#endif
> +
> +#define _REG_RET "%" _ASM_AX
> +
> +#define NATIVE_ZERO "xor " _REG_ARG1 ", " _REG_ARG1
> +#define NATIVE_IDENTITY "mov " _REG_ARG1 ", " _REG_RET
> +#define NATIVE_SAVE_FL "pushf; pop " _REG_RET
> +#define NATIVE_RESTORE_FL "push " _REG_ARG1 "; popf"
> +#define NATI...
2017 Oct 04
1
[PATCH 03/13] x86/paravirt: Convert native patch assembly code strings to macros
...ps.h>
+#ifdef CONFIG_X86_64
+# define _REG_ARG1 "%rdi"
+# define NATIVE_IDENTITY_32 "mov %edi, %eax"
+# define NATIVE_USERGS_SYSRET64 "swapgs; sysretq"
+#else
+# define _REG_ARG1 "%eax"
+#endif
+
+#define _REG_RET "%" _ASM_AX
+
+#define NATIVE_ZERO "xor " _REG_ARG1 ", " _REG_ARG1
+#define NATIVE_IDENTITY "mov " _REG_ARG1 ", " _REG_RET
+#define NATIVE_SAVE_FL "pushf; pop " _REG_RET
+#define NATIVE_RESTORE_FL "push " _REG_ARG1 "; popf"
+#define NATIVE_IRQ_DISABLE &quo...
2017 Nov 17
0
[PATCH 03/13] x86/paravirt: Convert native patch assembly code strings to macros
...them. So identity isn't a bad name after all.
>
>> +# define NATIVE_USERGS_SYSRET64 "swapgs; sysretq"
>> +#else
>> +# define _REG_ARG1 "%eax"
>> +#endif
>> +
>> +#define _REG_RET "%" _ASM_AX
>> +
>> +#define NATIVE_ZERO "xor " _REG_ARG1 ", " _REG_ARG1
>
> NATIVE_ZERO_OUT
>
> I guess. NATIVE_ZERO reads like the native representation of 0 :-)
NATIVE_ZERO_ARG1?
Juergen
2017 Oct 04
0
[PATCH 04/13] x86/paravirt: Convert DEF_NATIVE macro to GCC extended asm syntax
...IVE_IDENTITY_32 "mov %%edi, %%eax"
# define NATIVE_USERGS_SYSRET64 "swapgs; sysretq"
#else
-# define _REG_ARG1 "%eax"
+# define _REG_ARG1 "%%eax"
#endif
-#define _REG_RET "%" _ASM_AX
+#define _REG_RET "%%" _ASM_AX
#define NATIVE_ZERO "xor " _REG_ARG1 ", " _REG_ARG1
#define NATIVE_IDENTITY "mov " _REG_ARG1 ", " _REG_RET
@@ -22,9 +22,9 @@
#define NATIVE_RESTORE_FL "push " _REG_ARG1 "; popf"
#define NATIVE_IRQ_DISABLE "cli"
#define NATIVE_IRQ_ENABLE &...
2017 Oct 04
31
[PATCH 00/13] x86/paravirt: Make pv ops code generation more closely match reality
This changes the pv ops code generation to more closely match reality.
For example, instead of:
callq *0xffffffff81e3a400 (pv_irq_ops.save_fl)
vmlinux will now show:
pushfq
pop %rax
nop
nop
nop
nop
nop
which is what the runtime version of the code will show in most cases.
This idea was suggested by Andy Lutomirski.
The benefits are:
- For the most common runtime cases
2017 Oct 04
31
[PATCH 00/13] x86/paravirt: Make pv ops code generation more closely match reality
This changes the pv ops code generation to more closely match reality.
For example, instead of:
callq *0xffffffff81e3a400 (pv_irq_ops.save_fl)
vmlinux will now show:
pushfq
pop %rax
nop
nop
nop
nop
nop
which is what the runtime version of the code will show in most cases.
This idea was suggested by Andy Lutomirski.
The benefits are:
- For the most common runtime cases