search for: _pvsite

...etions(-) diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index d49bbf4bb5c8..76b4b5c056f3 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -822,7 +822,7 @@ extern void default_banner(void); #else /* __ASSEMBLY__ */ -#define _PVSITE(ptype, clobbers, ops, word, algn) \ +#define _PVSITE(ptype, ops, word, algn) \ 771:; \ ops; \ 772:; \ @@ -831,7 +831,6 @@ extern void default_banner(void); word 771b; \ .byte ptype; \ .byte 772b-771b; \ - .short clobbers; \ .popsection @@ -864,7 +863,7 @...

...index 000000000000..add8a190fdac --- /dev/null +++ b/arch/x86/include/asm/paravirt-asm.h @@ -0,0 +1,126 @@ +#ifndef _ASM_X86_PARAVIRT_ASM_H +#define _ASM_X86_PARAVIRT_ASM_H + +#ifdef CONFIG_PARAVIRT +#ifdef __ASSEMBLY__ + +#include <asm/asm.h> +#include <asm/paravirt_types.h> + +#define _PVSITE(ptype, clobbers, ops, word, algn) \ +771:; \ + ops; \ +772:; \ + .pushsection .parainstructions,"a"; \ + .align algn; \ + word 771b; \ + .byte ptype; \ + .byte 772b-771b; \ + .short clobbers; \ + .popsection + + +#define COND_PUSH(set, mask, reg) \ + .if...

...git a/arch/x86/include/asm/paravirt-asm.h b/arch/x86/include/asm/paravirt-asm.h index add8a190fdac..8bdd50ee4bf3 100644 --- a/arch/x86/include/asm/paravirt-asm.h +++ b/arch/x86/include/asm/paravirt-asm.h @@ -7,16 +7,18 @@ #include <asm/asm.h> #include <asm/paravirt_types.h> -#define _PVSITE(ptype, clobbers, ops, word, algn) \ -771:; \ - ops; \ -772:; \ - .pushsection .parainstructions,"a"; \ - .align algn; \ - word 771b; \ - .byte ptype; \ - .byte 772b-771b; \ - .short clobbers; \ +#define PV_TYPE(ops, off) ((PARAVIRT_PATCH_##ops + (off)) / __...

Hi folks, With this series, the bulk of the work of pvops64 is done. Here, I integrate most of the paravirt.c and paravirt.h files, making them applicable to both architectures. CONFIG_PARAVIRT is _not_ present yet. Basically, this code is missing page table integration (patches currently being worked on by Jeremy). Enjoy

Hi folks, With this series, the bulk of the work of pvops64 is done. Here, I integrate most of the paravirt.c and paravirt.h files, making them applicable to both architectures. CONFIG_PARAVIRT is _not_ present yet. Basically, this code is missing page table integration (patches currently being worked on by Jeremy). Enjoy

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

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

This series removes some no longer needed stuff from paravirt infrastructure and puts large quantities of paravirt ops under a new config option PARAVIRT_XXL which is selected by XEN_PV only. A pvops kernel without XEN_PV being configured is about 2.5% smaller with this series applied. tip commit 5800dc5c19f34e6e03b5adab1282535cb102fafd ("x86/paravirt: Fix spectre-v2 mitigations for

...+ pv_init_ops.after_bootmem(); > +} > + Putting this in the paravirt framework is overkill IMO. There is no need to patch the callsites for optimal performance. I'd put it into struct x86_hyper_init and pre-init it with x86_init_noop > #else /* __ASSEMBLY__ */ > > #define _PVSITE(ptype, clobbers, ops, word, algn) \ > @@ -964,6 +969,10 @@ static inline void paravirt_arch_dup_mmap(struct mm_struct *oldmm, > static inline void paravirt_arch_exit_mmap(struct mm_struct *mm) > { > } > + > +static inline void paravirt_after_bootmem(void) > +{ > +} >...

This series removes some no longer needed stuff from paravirt infrastructure and puts large quantities of paravirt ops under a new config option PARAVIRT_XXL which is selected by XEN_PV only. A pvops kernel without XEN_PV being configured is about 2.5% smaller with this series applied. tip commit 5800dc5c19f34e6e03b5adab1282535cb102fafd ("x86/paravirt: Fix spectre-v2 mitigations for

...S */ #ifdef CONFIG_X86_32 @@ -862,7 +865,7 @@ extern void default_banner(void); COND_POP(set, CLBR_RCX, rcx); \ COND_POP(set, CLBR_RAX, rax) -#define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 8) +#define PARA_PATCH(off) ((off) / 8) #define PARA_SITE(ptype, ops) _PVSITE(ptype, ops, .quad, 8) #define PARA_INDIRECT(addr) *addr(%rip) #else @@ -877,35 +880,35 @@ extern void default_banner(void); COND_POP(set, CLBR_EDI, edi); \ COND_POP(set, CLBR_EAX, eax) -#define PARA_PATCH(struct, off) ((PARAVIRT_PATCH_##struct + (off)) / 4) +#define PARA_PATCH(off)...

This is a small series getting rid of paravirt patching by switching completely to alternative patching for the same functionality. The basic idea is to add the capability to switch from indirect to direct calls via a special alternative patching option. This removes _some_ of the paravirt macro maze, but most of it needs to stay due to the need of hiding the call instructions from the compiler

This is a small series getting rid of paravirt patching by switching completely to alternative patching for the same functionality. The basic idea is to add the capability to switch from indirect to direct calls via a special alternative patching option. This removes _some_ of the paravirt macro maze, but most of it needs to stay due to the need of hiding the call instructions from the compiler