search for: end_lock_vcpu_is_preempt

...+ start_lock_queued_spin_unlock, + end_lock_queued_spin_unlock); + else + return paravirt_patch_default(type, ibuf, addr, len); - case PARAVIRT_PATCH(lock.vcpu_is_preempted): - if (pv_is_native_vcpu_is_preempted()) { - start = start_lock_vcpu_is_preempted; - end = end_lock_vcpu_is_preempted; - goto patch_site; - } - goto patch_default; + case PARAVIRT_PATCH(lock.vcpu_is_preempted): + if (pv_is_native_vcpu_is_preempted()) + return paravirt_patch_insns(ibuf, len, + start_lock_vcpu_is_preempted, + end_lock_vcpu_is_preempted); + else + return paravirt_patc...

...+ start_lock_queued_spin_unlock, + end_lock_queued_spin_unlock); + else + return paravirt_patch_default(type, ibuf, addr, len); - case PARAVIRT_PATCH(lock.vcpu_is_preempted): - if (pv_is_native_vcpu_is_preempted()) { - start = start_lock_vcpu_is_preempted; - end = end_lock_vcpu_is_preempted; - goto patch_site; - } - goto patch_default; + case PARAVIRT_PATCH(lock.vcpu_is_preempted): + if (pv_is_native_vcpu_is_preempted()) + return paravirt_patch_insns(ibuf, len, + start_lock_vcpu_is_preempted, + end_lock_vcpu_is_preempted); + else + return paravirt_patc...

...e; + + return paravirt_patch_insns(ibuf, len, start, end); } - goto patch_default; + return paravirt_patch_default(type, ibuf, addr, len); case PARAVIRT_PATCH(lock.vcpu_is_preempted): if (pv_is_native_vcpu_is_preempted()) { start = start_lock_vcpu_is_preempted; end = end_lock_vcpu_is_preempted; - goto patch_site; + + return paravirt_patch_insns(ibuf, len, start, end); } - goto patch_default; + return paravirt_patch_default(type, ibuf, addr, len); #endif default: -patch_default: __maybe_unused ret = paravirt_patch_default(type, ibuf, addr, len); break; - -patch_...

...e; + + return paravirt_patch_insns(ibuf, len, start, end); } - goto patch_default; + return paravirt_patch_default(type, ibuf, addr, len); case PARAVIRT_PATCH(lock.vcpu_is_preempted): if (pv_is_native_vcpu_is_preempted()) { start = start_lock_vcpu_is_preempted; end = end_lock_vcpu_is_preempted; - goto patch_site; + + return paravirt_patch_insns(ibuf, len, start, end); } - goto patch_default; + return paravirt_patch_default(type, ibuf, addr, len); #endif default: -patch_default: __maybe_unused ret = paravirt_patch_default(type, ibuf, addr, len); break; - -patch_...

...pin_unlock()) + return paravirt_patch_insns(ibuf, len, + start_lock_queued_spin_unlock, + end_lock_queued_spin_unlock); + break; - case PARAVIRT_PATCH(lock.vcpu_is_preempted): - if (pv_is_native_vcpu_is_preempted()) { - start = start_lock_vcpu_is_preempted; - end = end_lock_vcpu_is_preempted; - goto patch_site; - } - goto patch_default; + case PARAVIRT_PATCH(lock.vcpu_is_preempted): + if (pv_is_native_vcpu_is_preempted()) + return paravirt_patch_insns(ibuf, len, + start_lock_vcpu_is_preempted, + end_lock_vcpu_is_preempted); + break; #endif default: -...

On Mon, Sep 10, 2018 at 08:54:12AM +0200, Juergen Gross wrote: > > + case PARAVIRT_PATCH(lock.queued_spin_unlock): > > + if (pv_is_native_spin_unlock()) > > + return paravirt_patch_insns(ibuf, len, > > + start_lock_queued_spin_unlock, > > + end_lock_queued_spin_unlock); > > + else > > + return paravirt_patch_default(type, ibuf,

On Mon, Sep 10, 2018 at 08:54:12AM +0200, Juergen Gross wrote: > > + case PARAVIRT_PATCH(lock.queued_spin_unlock): > > + if (pv_is_native_spin_unlock()) > > + return paravirt_patch_insns(ibuf, len, > > + start_lock_queued_spin_unlock, > > + end_lock_queued_spin_unlock); > > + else > > + return paravirt_patch_default(type, ibuf,

....f09d264cbd2d 100644 --- a/arch/x86/kernel/paravirt_patch_64.c +++ b/arch/x86/kernel/paravirt_patch_64.c @@ -76,7 +76,8 @@ unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len) if (pv_is_native_vcpu_is_preempted()) { start = start_lock_vcpu_is_preempted; end = end_lock_vcpu_is_preempted; - goto patch_site; + + return paravirt_patch_insns(ibuf, len, start, end); } goto patch_default; #endif @@ -86,7 +87,6 @@ patch_default: __maybe_unused ret = paravirt_patch_default(type, ibuf, addr, len); break; -patch_site: ret = paravirt_patch_insns(ibuf, len, start,...

....f09d264cbd2d 100644 --- a/arch/x86/kernel/paravirt_patch_64.c +++ b/arch/x86/kernel/paravirt_patch_64.c @@ -76,7 +76,8 @@ unsigned native_patch(u8 type, void *ibuf, unsigned long addr, unsigned len) if (pv_is_native_vcpu_is_preempted()) { start = start_lock_vcpu_is_preempted; end = end_lock_vcpu_is_preempted; - goto patch_site; + + return paravirt_patch_insns(ibuf, len, start, end); } goto patch_default; #endif @@ -86,7 +87,6 @@ patch_default: __maybe_unused ret = paravirt_patch_default(type, ibuf, addr, len); break; -patch_site: ret = paravirt_patch_insns(ibuf, len, start,...

...+ return paravirt_patch_default(type, ibuf, addr, len); Why not replace the else clause by a "break;" and ... > > - case PARAVIRT_PATCH(lock.vcpu_is_preempted): > - if (pv_is_native_vcpu_is_preempted()) { > - start = start_lock_vcpu_is_preempted; > - end = end_lock_vcpu_is_preempted; > - goto patch_site; > - } > - goto patch_default; > + case PARAVIRT_PATCH(lock.vcpu_is_preempted): > + if (pv_is_native_vcpu_is_preempted()) > + return paravirt_patch_insns(ibuf, len, > + start_lock_vcpu_is_preempted, > + end_lock_vcpu_is_pree...

...uf, len, start, end); > } > - goto patch_default; > + return paravirt_patch_default(type, ibuf, addr, len); > > case PARAVIRT_PATCH(lock.vcpu_is_preempted): > if (pv_is_native_vcpu_is_preempted()) { > start = start_lock_vcpu_is_preempted; > end = end_lock_vcpu_is_preempted; > - goto patch_site; > + > + return paravirt_patch_insns(ibuf, len, start, end); > } > - goto patch_default; > + return paravirt_patch_default(type, ibuf, addr, len); > #endif > > default: > -patch_default: __maybe_unused > ret = paravirt_pa...

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

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