similar to: [02/17][PATCH] Implement smp_call_function_mask for ia64 - V8

Zhang, Xiantao wrote: > > diff --git a/include/linux/smp.h b/include/linux/smp.h > index 55232cc..b71820b 100644 > --- a/include/linux/smp.h > +++ b/include/linux/smp.h > @@ -56,6 +56,9 @@ int smp_call_function(void(*func)(void *info), void > *info, int retry, int wait); > > int smp_call_function_single(int cpuid, void (*func) (void *info), void > *info, >

smp_call_function and smp_call_function_single are almost complete duplicates of the same logic. This patch combines them by implementing them in terms of the more general smp_call_function_mask(). [ Jan, Andi: This only changes arch/i386; can x86_64 be changed in the same way? ] [ Rebased onto Jan's x86_64-mm-consolidate-smp_send_stop patch ] Signed-off-by: Jeremy Fitzhardinge

smp_call_function and smp_call_function_single are almost complete duplicates of the same logic. This patch combines them by implementing them in terms of the more general smp_call_function_mask(). [ Jan, Andi: This only changes arch/i386; can x86_64 be changed in the same way? ] [ Rebased onto Jan's x86_64-mm-consolidate-smp_send_stop patch ] Signed-off-by: Jeremy Fitzhardinge

This adds an smp_ops for voyager, and hooks things up appropriately. This is the first baby-step to making subarch runtime switchable. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Eric W. Biederman <ebiederm@xmission.com> --- arch/i386/kernel/Makefile | 1 arch/i386/kernel/smp.c

This adds an smp_ops for voyager, and hooks things up appropriately. This is the first baby-step to making subarch runtime switchable. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Eric W. Biederman <ebiederm@xmission.com> --- arch/i386/kernel/Makefile | 1 arch/i386/kernel/smp.c

Zhang, Xiantao wrote: >>From 62895ff991d48398a77afdbf7f2bef127e802230 Mon Sep 17 00:00:00 2001 > From: Xiantao Zhang <xiantao.zhang at intel.com> > Date: Fri, 28 Mar 2008 09:49:57 +0800 > Subject: [PATCH] KVM: IA64: Add kvm arch-specific core code for > kvm/ia64. > > kvm_ia64.c is created to handle kvm ia64-specific core logic. > Signed-off-by: Xiantao Zhang

Zhang, Xiantao wrote: >>From 62895ff991d48398a77afdbf7f2bef127e802230 Mon Sep 17 00:00:00 2001 > From: Xiantao Zhang <xiantao.zhang at intel.com> > Date: Fri, 28 Mar 2008 09:49:57 +0800 > Subject: [PATCH] KVM: IA64: Add kvm arch-specific core code for > kvm/ia64. > > kvm_ia64.c is created to handle kvm ia64-specific core logic. > Signed-off-by: Xiantao Zhang

From: Julien Grall <julien.grall@citrix.com> Move smp_call_function and on_selected_cpus to common code. Signed-off-by: Julien Grall <julien.grall@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Acked-by: Keir Fraser <keir@xen.org> --- Changes in V2: - Add copyright header in xen/common/smp.c xen/arch/arm/gic.c | 3 ++ xen/arch/arm/smp.c

Zhang, Xiantao wrote: >>From 6b731c15afa8cec84f16408c421c286f1dd1b7d3 Mon Sep 17 00:00:00 2001 > From: Xiantao Zhang <xiantao.zhang at intel.com> > Date: Wed, 12 Mar 2008 13:45:40 +0800 > Subject: [PATCH] KVM:IA64 : Add TLB virtulization support. > > vtlb.c includes tlb/VHPT virtulization. > Signed-off-by: Anthony Xu <anthony.xu at intel.com> >

Zhang, Xiantao wrote: >>From 6b731c15afa8cec84f16408c421c286f1dd1b7d3 Mon Sep 17 00:00:00 2001 > From: Xiantao Zhang <xiantao.zhang at intel.com> > Date: Wed, 12 Mar 2008 13:45:40 +0800 > Subject: [PATCH] KVM:IA64 : Add TLB virtulization support. > > vtlb.c includes tlb/VHPT virtulization. > Signed-off-by: Anthony Xu <anthony.xu at intel.com> >

On 03/07/2019 18:02, Nadav Amit wrote: >> On Jul 3, 2019, at 7:04 AM, Juergen Gross <jgross at suse.com> wrote: >> >> On 03.07.19 01:51, Nadav Amit wrote: >>> To improve TLB shootdown performance, flush the remote and local TLBs >>> concurrently. Introduce flush_tlb_multi() that does so. Introduce >>> paravirtual versions of flush_tlb_multi() for

Add a smp_ops interface. This abstracts the API defined by <linux/smp.h> for use within arch/i386. The primary intent is that it be used by a paravirtualizing hypervisor to implement SMP, but it could also be used by non-APIC-using sub-architectures. This is related to CONFIG_PARAVIRT, but is implemented unconditionally since it is simpler that way and not a highly performance-sensitive

Add a smp_ops interface. This abstracts the API defined by <linux/smp.h> for use within arch/i386. The primary intent is that it be used by a paravirtualizing hypervisor to implement SMP, but it could also be used by non-APIC-using sub-architectures. This is related to CONFIG_PARAVIRT, but is implemented unconditionally since it is simpler that way and not a highly performance-sensitive

Hi Xiantao, I general I think the code in this patch is fine. I have a couple of nit-picking comments: > + if (target_mask&0x1) { The formatting here isn't quite what most of the kernel does. It would be better if you added spaces so it's a little easier to read, ie: if (target_mask & 0x1) { > + p = &__per_cpu_idtrs[cpu][0][0]; > + for (i = IA64_TR_ALLOC_BASE;

Hi Xiantao, I general I think the code in this patch is fine. I have a couple of nit-picking comments: > + if (target_mask&0x1) { The formatting here isn't quite what most of the kernel does. It would be better if you added spaces so it's a little easier to read, ie: if (target_mask & 0x1) { > + p = &__per_cpu_idtrs[cpu][0][0]; > + for (i = IA64_TR_ALLOC_BASE;

To improve TLB shootdown performance, flush the remote and local TLBs concurrently. Introduce flush_tlb_multi() that does so. The current flush_tlb_others() interface is kept, since paravirtual interfaces need to be adapted first before it can be removed. This is left for future work. In such PV environments, TLB flushes are not performed, at this time, concurrently. Add a static key to tell

To improve TLB shootdown performance, flush the remote and local TLBs concurrently. Introduce flush_tlb_multi() that does so. The current flush_tlb_others() interface is kept, since paravirtual interfaces need to be adapted first before it can be removed. This is left for future work. In such PV environments, TLB flushes are not performed, at this time, concurrently. Add a static key to tell

Zhang, Xiantao wrote: > Compared with V9, just fixed indentation issues in patch 12. I put it > the patchset in > git://git.kernel.org/pub/scm/linux/kernel/git/xiantao/kvm-ia64.git > kvm-ia64-mc10. Please help to review. > Specially, the first two patches (TR Management patch and > smp_call_function_mask patch) needs Tony's review and Ack. Thanks:-) > Rebased and

Zhang, Xiantao wrote: > Compared with V9, just fixed indentation issues in patch 12. I put it > the patchset in > git://git.kernel.org/pub/scm/linux/kernel/git/xiantao/kvm-ia64.git > kvm-ia64-mc10. Please help to review. > Specially, the first two patches (TR Management patch and > smp_call_function_mask patch) needs Tony's review and Ack. Thanks:-) > Rebased and

On 03.07.19 01:51, Nadav Amit wrote: > To improve TLB shootdown performance, flush the remote and local TLBs > concurrently. Introduce flush_tlb_multi() that does so. Introduce > paravirtual versions of flush_tlb_multi() for KVM, Xen and hyper-v (Xen > and hyper-v are only compile-tested). > > While the updated smp infrastructure is capable of running a function on > a single