search for: pvop_vcallee0

...estore(unsigned long f) > +static inline noinstr void arch_local_irq_restore(unsigned long f) > { > PVOP_VCALLEE1(irq.restore_fl, f); > } > > -static inline notrace void arch_local_irq_disable(void) > +static inline noinstr void arch_local_irq_disable(void) > { > PVOP_VCALLEE0(irq.irq_disable); > } > > -static inline notrace void arch_local_irq_enable(void) > +static inline noinstr void arch_local_irq_enable(void) > { > PVOP_VCALLEE0(irq.irq_enable); > } > > -static inline notrace unsigned long arch_local_irq_save(void) > +static in...

...tive, op) #define PVOP_VCALL0(op) \ __PVOP_VCALL(op, "", "") #define PVOP_CALLEE0(rettype, op) \ __PVOP_CALLEESAVE(rettype, op, "", "") +#define PVOP_ALT_CALLEE0(rettype, native, op) \ + __PVOP_ALT_CALLEESAVE(rettype, native, op) #define PVOP_VCALLEE0(op) \ __PVOP_VCALLEESAVE(op, "", "") +#define PVOP_ALT_VCALLEE0(native, op) \ + __PVOP_ALT_VCALLEESAVE(native, op) #define PVOP_CALL1(rettype, op, arg1) \ __PVOP_CALL(rettype, op, "", "", PVOP_CALL_ARG1(arg1)) #define PVOP_VCALL1(op, ar...

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

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

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,

...nline notrace unsigned long arch_local_save_flags(void) return PVOP_CALLEE0(unsigned long, pv_irq_ops.save_fl); } -static inline notrace void arch_local_irq_restore(unsigned long f) -{ - PVOP_VCALLEE1(pv_irq_ops.restore_fl, f); -} - static inline notrace void arch_local_irq_disable(void) { PVOP_VCALLEE0(pv_irq_ops.irq_disable); @@ -786,6 +782,16 @@ static inline notrace unsigned long arch_local_irq_save(void) return f; } +/* + * In a VM, setting the IF flag can cause an expensive VM exit. So if + * interrupt was disabled before arch_local_irq_save(), we don't need to + * do anything at al...

...nline notrace unsigned long arch_local_save_flags(void) return PVOP_CALLEE0(unsigned long, pv_irq_ops.save_fl); } -static inline notrace void arch_local_irq_restore(unsigned long f) -{ - PVOP_VCALLEE1(pv_irq_ops.restore_fl, f); -} - static inline notrace void arch_local_irq_disable(void) { PVOP_VCALLEE0(pv_irq_ops.irq_disable); @@ -786,6 +782,16 @@ static inline notrace unsigned long arch_local_irq_save(void) return f; } +/* + * In a VM, setting the IF flag can cause an expensive VM exit. So if + * interrupt was disabled before arch_local_irq_save(), we don't need to + * do anything at al...