Displaying 4 results from an estimated 4 matches for "pv_input_constraint".
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pv_input_constraints
2017 Oct 04
0
[PATCH 08/13] x86/paravirt: Clean up paravirt_types.h
...clobber
+
+#define PV_CALL_CONSTRAINT_STR PV_STRINGIFY(PV_CALL_CONSTRAINT)
+#define PV_TYPE_CONSTRAINT_STR PV_STRINGIFY(PV_TYPE_CONSTRAINT)
+#define PV_CLBR_CONSTRAINT_STR PV_STRINGIFY(PV_CLBR_CONSTRAINT)
+
+#define PV_CALL_STR "call *" PV_CALL_CONSTRAINT_STR ";"
+
+#define PV_INPUT_CONSTRAINTS(op, clobber) \
+ [PV_TYPE_CONSTRAINT] "i" (PARAVIRT_PATCH(op)), \
+ [PV_CALL_CONSTRAINT] "i" (&(op)), \
+ [PV_CLBR_CONSTRAINT] "i" (clobber)
+
+#define PV_SITE(insn_string) \
+ _PV_SITE(insn_string, PV_TYPE_CONSTRAINT_STR, PV_CLBR_CONSTRAINT_STR)
+
+#...
2017 Oct 04
1
[PATCH 11/13] x86/paravirt: Add paravirt alternatives infrastructure
...+#define ____PVOP_ALT_CALL(rettype, native, op, clbr, call_clbr, \
+ extra_clbr, ...) \
+({ \
+ rettype __ret; \
+ PVOP_CALL_ARGS; \
+ PVOP_TEST_NULL(op); \
+ asm volatile(PV_ALT_SITE(native, PV_CALL_STR) \
+ : call_clbr, ASM_CALL_CONSTRAINT \
+ : PV_INPUT_CONSTRAINTS(op, clbr), \
+ ##__VA_ARGS__ \
+ : "memory", "cc" extra_clbr); \
+ if (IS_ENABLED(CONFIG_X86_32) && \
+ sizeof(rettype) > sizeof(unsigned long)) \
+ __ret = (rettype)((((u64)__edx) << 32) | __eax); \
+ else \
+ __ret = (r...
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