search for: paravirt_patch_template

...4 deletions(-) > > diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h > index 70b654f3ffe5..fd7dc37d0010 100644 > --- a/arch/x86/include/asm/paravirt_types.h > +++ b/arch/x86/include/asm/paravirt_types.h > @@ -338,9 +338,25 @@ extern struct paravirt_patch_template pv_ops; > #define PARAVIRT_PATCH(x) \ > (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) > > +#ifdef CONFIG_X86_PIE > +#define paravirt_opptr_call "a" > +#define paravirt_opptr_type "p" > + > +/* > + * Alternative patching requir...

...4 deletions(-) > > diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h > index 70b654f3ffe5..fd7dc37d0010 100644 > --- a/arch/x86/include/asm/paravirt_types.h > +++ b/arch/x86/include/asm/paravirt_types.h > @@ -338,9 +338,25 @@ extern struct paravirt_patch_template pv_ops; > #define PARAVIRT_PATCH(x) \ > (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) > > +#ifdef CONFIG_X86_PIE > +#define paravirt_opptr_call "a" > +#define paravirt_opptr_type "p" > + > +/* > + * Alternative patching requir...

Instead of using six globally visible paravirt ops structures combine them in a single structure, keeping the original structures as sub-structures. This avoids the need to assemble struct paravirt_patch_template at runtime on the stack each time apply_paravirt() is being called (i.e. when loading a module). Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/hyperv/mmu.c | 4 +- arch/x86/include/asm/paravirt.h | 51 ++++--- arch/x86/include/asm/paravirt_types.h |...

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

...sm/paravirt.h index cf3a0fd7c1a7..7b1c81b544bb 100644 --- a/arch/arm64/include/asm/paravirt.h +++ b/arch/arm64/include/asm/paravirt.h @@ -11,8 +11,13 @@ struct pv_time_ops { unsigned long long (*steal_clock)(int cpu); }; +struct pv_lock_ops { + bool (*vcpu_is_preempted)(int cpu); +}; + struct paravirt_patch_template { struct pv_time_ops time; + struct pv_lock_ops lock; }; extern struct paravirt_patch_template pv_ops; @@ -24,6 +29,13 @@ static inline u64 paravirt_steal_clock(int cpu) int __init pv_time_init(void); +__visible bool __native_vcpu_is_preempted(int cpu); + +static inline bool pv_vcpu_is_p...

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

...le changed, 21 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 70b654f3ffe5..fd7dc37d0010 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -338,9 +338,25 @@ extern struct paravirt_patch_template pv_ops; #define PARAVIRT_PATCH(x) \ (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) +#ifdef CONFIG_X86_PIE +#define paravirt_opptr_call "a" +#define paravirt_opptr_type "p" + +/* + * Alternative patching requires a maximum of 7 bytes but the relative call...

...le changed, 28 insertions(+), 4 deletions(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 84812964d3dd..82f7ca22e0ae 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -336,9 +336,32 @@ extern struct paravirt_patch_template pv_ops; #define PARAVIRT_PATCH(x) \ (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) +#ifdef CONFIG_X86_PIE +#define paravirt_opptr_call "a" +#define paravirt_opptr_type "p" + +/* + * Alternative patching requires a maximum of 7 bytes but the relative call...

Minor changes based on feedback and rebase from v8. Splitting the previous serie in two. This part contains assembly code changes required for PIE but without any direct dependencies with the rest of the patchset. Changes: - patch v9 (assembly): - Moved to relative reference for sync_core based on feedback. - x86/crypto had multiple algorithms deleted, removed PIE changes to them. -

Minor changes based on feedback and rebase from v8. Splitting the previous serie in two. This part contains assembly code changes required for PIE but without any direct dependencies with the rest of the patchset. Changes: - patch v9 (assembly): - Moved to relative reference for sync_core based on feedback. - x86/crypto had multiple algorithms deleted, removed PIE changes to them. -

...- 2 files changed, 29 insertions(+), 28 deletions(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 26942ad..488c596 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -348,11 +348,23 @@ extern struct paravirt_patch_template pv_ops; #define paravirt_clobber(clobber) \ [paravirt_clobber] "i" (clobber) +/* + * Generate some code, and mark it as patchable by the + * apply_paravirt() alternate instruction patcher. + */ +#define _paravirt_alt(insn_string, type, clobber) \ + "771:\n\t" insn_string &...

.....5656aea79412 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -331,33 +331,6 @@ extern struct pv_irq_ops pv_irq_ops; extern struct pv_mmu_ops pv_mmu_ops; extern struct pv_lock_ops pv_lock_ops; -#define PARAVIRT_PATCH(x) \ - (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) - -#define paravirt_type(op) \ - [paravirt_typenum] "i" (PARAVIRT_PATCH(op)), \ - [paravirt_opptr] "i" (&(op)) -#define paravirt_clobber(clobber) \ - [paravirt_clobber] "i" (clobber) - -/* - * Generate some code, and mark it as patchable b...

...;> + void (*poll)(void); >> +} __no_randomize_layout; >> + >> /* This contains all the paravirt structures: we get a convenient >> * number for each function using the offset which we use to indicate >> * what to patch. */ >> @@ -334,6 +338,7 @@ struct paravirt_patch_template { >> struct pv_irq_ops pv_irq_ops; >> struct pv_mmu_ops pv_mmu_ops; >> struct pv_lock_ops pv_lock_ops; >> + struct pv_idle_ops pv_idle_ops; >> } __no_randomize_layout; >> >> extern struct pv_info pv_info; >> @@ -343,6 +348,7 @@ struct...

...;> + void (*poll)(void); >> +} __no_randomize_layout; >> + >> /* This contains all the paravirt structures: we get a convenient >> * number for each function using the offset which we use to indicate >> * what to patch. */ >> @@ -334,6 +338,7 @@ struct paravirt_patch_template { >> struct pv_irq_ops pv_irq_ops; >> struct pv_mmu_ops pv_mmu_ops; >> struct pv_lock_ops pv_lock_ops; >> + struct pv_idle_ops pv_idle_ops; >> } __no_randomize_layout; >> >> extern struct pv_info pv_info; >> @@ -343,6 +348,7 @@ struct...

...uct pv_time_ops { unsigned long long (*steal_clock)(int cpu); }; +struct pv_vcpu_ops { + bool (*vcpu_is_preempted)(int cpu); +}; + struct pv_cpu_ops { /* hooks for various privileged instructions */ unsigned long (*get_debugreg)(int regno); @@ -318,6 +322,7 @@ struct pv_lock_ops { struct paravirt_patch_template { struct pv_init_ops pv_init_ops; struct pv_time_ops pv_time_ops; + struct pv_vcpu_ops pv_vcpu_ops; struct pv_cpu_ops pv_cpu_ops; struct pv_irq_ops pv_irq_ops; struct pv_mmu_ops pv_mmu_ops; @@ -327,6 +332,7 @@ struct paravirt_patch_template { extern struct pv_info pv_info; extern struct...

...le changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 2474e434a6f7..93be18bdb63e 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -343,9 +343,17 @@ extern struct paravirt_patch_template pv_ops; #define PARAVIRT_PATCH(x) \ (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) +#ifdef CONFIG_X86_PIE +#define paravirt_opptr_call "a" +#define paravirt_opptr_type "p" +#else +#define paravirt_opptr_call "c" +#define paravirt_opptr_type &qu...

...> diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h > > index 70b654f3ffe5..fd7dc37d0010 100644 > > --- a/arch/x86/include/asm/paravirt_types.h > > +++ b/arch/x86/include/asm/paravirt_types.h > > @@ -338,9 +338,25 @@ extern struct paravirt_patch_template pv_ops; > > #define PARAVIRT_PATCH(x) \ > > (offsetof(struct paravirt_patch_template, x) / sizeof(void *)) > > > > +#ifdef CONFIG_X86_PIE > > +#define paravirt_opptr_call "a" > > +#define paravirt_opptr_type "p" > > + > >...

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

The long term plan has been to replace Xen PV guests by PVH. The first victim of that plan are now 32-bit PV guests, as those are used only rather seldom these days. Xen on x86 requires 64-bit support and with Grub2 now supporting PVH officially since version 2.04 there is no need to keep 32-bit PV guest support alive in the Linux kernel. Additionally Meltdown mitigation is not available in the

...s_preempted; } __no_randomize_layout; +struct pv_idle_ops { + void (*poll)(void); +} __no_randomize_layout; + /* This contains all the paravirt structures: we get a convenient * number for each function using the offset which we use to indicate * what to patch. */ @@ -323,6 +327,7 @@ struct paravirt_patch_template { struct pv_irq_ops pv_irq_ops; struct pv_mmu_ops pv_mmu_ops; struct pv_lock_ops pv_lock_ops; + struct pv_idle_ops pv_idle_ops; } __no_randomize_layout; extern struct pv_info pv_info; @@ -332,6 +337,7 @@ struct paravirt_patch_template { extern struct pv_irq_ops pv_irq_ops; extern struct...