search for: paravirt_callee_sav

...id arch_start_context_switch(struct task_struct *prev) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 8dfcb2508e6d..f27c3febaa6e 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -68,12 +68,7 @@ struct paravirt_callee_save { /* general info */ struct pv_info { #ifdef CONFIG_PARAVIRT_XXL - unsigned int kernel_rpl; - int shared_kernel_pmd; - -#ifdef CONFIG_X86_64 u16 extra_user_64bit_cs; /* __USER_CS if none */ -#endif #endif const char *name; @@ -126,9 +121,7 @@ struct pv_cpu_ops { void (*set_ldt)(const...

...v_mmu_ops { phys_addr_t phys, pgprot_t flags); }; +struct mcs_spinlock; +struct qspinlock; + struct arch_spinlock; #ifdef CONFIG_SMP #include <asm/spinlock_types.h> @@ -334,8 +337,20 @@ typedef u16 __ticket_t; #endif struct pv_lock_ops { +#ifdef CONFIG_QUEUE_SPINLOCK + struct paravirt_callee_save init_node; + struct paravirt_callee_save link_and_wait_node; + struct paravirt_callee_save kick_node; + + struct paravirt_callee_save wait_head; + struct paravirt_callee_save queue_unlock; + + void (*wait)(int *ptr, int val); + void (*kick)(int cpu); +#else struct paravirt_callee_save lock_spinn...

...id arch_start_context_switch(struct task_struct *prev) diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h index 8dfcb2508e6d..f27c3febaa6e 100644 --- a/arch/x86/include/asm/paravirt_types.h +++ b/arch/x86/include/asm/paravirt_types.h @@ -68,12 +68,7 @@ struct paravirt_callee_save { /* general info */ struct pv_info { #ifdef CONFIG_PARAVIRT_XXL - unsigned int kernel_rpl; - int shared_kernel_pmd; - -#ifdef CONFIG_X86_64 u16 extra_user_64bit_cs; /* __USER_CS if none */ -#endif #endif const char *name; @@ -126,9 +121,7 @@ struct pv_cpu_ops { void (*set_ldt)(const...

...s.h >>> index 19efefc0e27e..928f5e7953a7 100644 >>> --- a/arch/x86/include/asm/paravirt_types.h >>> +++ b/arch/x86/include/asm/paravirt_types.h >>> @@ -319,6 +319,7 @@ struct pv_lock_ops { >>> void (*kick)(int cpu); >>> >>> struct paravirt_callee_save vcpu_is_preempted; >>> + struct paravirt_callee_save virt_spin_lock; >>> } __no_randomize_layout; >>> >>> /* This contains all the paravirt structures: we get a convenient >>> diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspi...

...s.h >>> index 19efefc0e27e..928f5e7953a7 100644 >>> --- a/arch/x86/include/asm/paravirt_types.h >>> +++ b/arch/x86/include/asm/paravirt_types.h >>> @@ -319,6 +319,7 @@ struct pv_lock_ops { >>> void (*kick)(int cpu); >>> >>> struct paravirt_callee_save vcpu_is_preempted; >>> + struct paravirt_callee_save virt_spin_lock; >>> } __no_randomize_layout; >>> >>> /* This contains all the paravirt structures: we get a convenient >>> diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspi...

...sm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h > index 19efefc0e27e..928f5e7953a7 100644 > --- a/arch/x86/include/asm/paravirt_types.h > +++ b/arch/x86/include/asm/paravirt_types.h > @@ -319,6 +319,7 @@ struct pv_lock_ops { > void (*kick)(int cpu); > > struct paravirt_callee_save vcpu_is_preempted; > + struct paravirt_callee_save virt_spin_lock; > } __no_randomize_layout; > > /* This contains all the paravirt structures: we get a convenient > diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspinlock.h > index 48a706f641f2..fbd9889...

...sm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h > index 19efefc0e27e..928f5e7953a7 100644 > --- a/arch/x86/include/asm/paravirt_types.h > +++ b/arch/x86/include/asm/paravirt_types.h > @@ -319,6 +319,7 @@ struct pv_lock_ops { > void (*kick)(int cpu); > > struct paravirt_callee_save vcpu_is_preempted; > + struct paravirt_callee_save virt_spin_lock; > } __no_randomize_layout; > > /* This contains all the paravirt structures: we get a convenient > diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspinlock.h > index 48a706f641f2..fbd9889...

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

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

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

A lot of cleanup after removal of 32-bit Xen PV guest support in paravirt code. Changes in V4: - dropped patches 1-3, as already committed - addressed comments to V3 - added new patches 5+6 Changes in V3: - addressed comments to V2 - split patch 1 into 2 patches - new patches 3 and 7 Changes in V2: - rebase to 5.8 kernel - addressed comments to V1 - new patches 3 and 4 Juergen Gross (6):

With virt_spin_lock() being a pvops function the bare metal case can be optimized by patching the call away completely. In case a kernel running as a guest it can decide whether to use paravitualized spinlocks, the current fallback to the unfair test-and-set scheme, or to mimic the bare metal behavior. Juergen Gross (4): paravirt: add generic _paravirt_false() function paravirt: switch

With virt_spin_lock() being a pvops function the bare metal case can be optimized by patching the call away completely. In case a kernel running as a guest it can decide whether to use paravitualized spinlocks, the current fallback to the unfair test-and-set scheme, or to mimic the bare metal behavior. Juergen Gross (4): paravirt: add generic _paravirt_false() function paravirt: switch

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

Today paravirtualization is a all-or-nothing game: either a kernel is compiled with no paravirtualization support at all, or it is supporting paravirtualized environments like Xen pv-guests or lguest additionally to some paravirtualized tuning for KVM, Hyperv, VMWare or Xen HVM-guests. As support of pv-guests requires quite intrusive pv-hooks (e.g. all access functions to page table entries,

...9efefc0e27e..928f5e7953a7 100644 >>>> --- a/arch/x86/include/asm/paravirt_types.h >>>> +++ b/arch/x86/include/asm/paravirt_types.h >>>> @@ -319,6 +319,7 @@ struct pv_lock_ops { >>>> void (*kick)(int cpu); >>>> >>>> struct paravirt_callee_save vcpu_is_preempted; >>>> + struct paravirt_callee_save virt_spin_lock; >>>> } __no_randomize_layout; >>>> >>>> /* This contains all the paravirt structures: we get a convenient >>>> diff --git a/arch/x86/include/asm/qspinlock.h b/arch/...

...sm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h > index 19efefc0e27e..928f5e7953a7 100644 > --- a/arch/x86/include/asm/paravirt_types.h > +++ b/arch/x86/include/asm/paravirt_types.h > @@ -319,6 +319,7 @@ struct pv_lock_ops { > void (*kick)(int cpu); > > struct paravirt_callee_save vcpu_is_preempted; > + struct paravirt_callee_save virt_spin_lock; > } __no_randomize_layout; > > /* This contains all the paravirt structures: we get a convenient > diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspinlock.h > index 48a706f641f2..fbd9889...

...sm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h > index 19efefc0e27e..928f5e7953a7 100644 > --- a/arch/x86/include/asm/paravirt_types.h > +++ b/arch/x86/include/asm/paravirt_types.h > @@ -319,6 +319,7 @@ struct pv_lock_ops { > void (*kick)(int cpu); > > struct paravirt_callee_save vcpu_is_preempted; > + struct paravirt_callee_save virt_spin_lock; > } __no_randomize_layout; > > /* This contains all the paravirt structures: we get a convenient > diff --git a/arch/x86/include/asm/qspinlock.h b/arch/x86/include/asm/qspinlock.h > index 48a706f641f2..fbd9889...