similar to: [PATCH] Add smp_ops interface

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

Wei Liu <wei.liu at kernel.org> writes: > Microsoft Hypervisor requires the root partition to make a few > hypercalls to setup application processors before they can be used. > > Signed-off-by: Lillian Grassin-Drake <ligrassi at microsoft.com> > Signed-off-by: Sunil Muthuswamy <sunilmut at microsoft.com> > Co-Developed-by: Lillian Grassin-Drake <ligrassi at

Convert xen to use the generic framework to boot secondary CPUs. Cc: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> Cc: Jeremy Fitzhardinge <jeremy at goop.org> Cc: Thomas Gleixner <tglx at linutronix.de> Cc: Ingo Molnar <mingo at redhat.com> Cc: "H. Peter Anvin" <hpa at zytor.com> Cc: x86 at kernel.org Cc: xen-devel at lists.xensource.com Cc:

Convert xen to use the generic framework to boot secondary CPUs. Cc: Konrad Rzeszutek Wilk <konrad.wilk at oracle.com> Cc: Jeremy Fitzhardinge <jeremy at goop.org> Cc: Thomas Gleixner <tglx at linutronix.de> Cc: Ingo Molnar <mingo at redhat.com> Cc: "H. Peter Anvin" <hpa at zytor.com> Cc: x86 at kernel.org Cc: xen-devel at lists.xensource.com Cc:

Hi folks, Here is the result of the latest work on the pvops front, after the x86 arch merge. From the functionality point of view, almost nothing was changed, except for proper vsmp support - which was discussed, but not implemented before - and the introduction of smp_ops in x86_64, which eased the merging of the smp header. Speaking of the merge, a significant part (although not majority) of

Hi folks, Here is the result of the latest work on the pvops front, after the x86 arch merge. From the functionality point of view, almost nothing was changed, except for proper vsmp support - which was discussed, but not implemented before - and the introduction of smp_ops in x86_64, which eased the merging of the smp header. Speaking of the merge, a significant part (although not majority) of

I'm looking at adding Xen SMP support, so I'm trying to work out what pv_ops we need, and how to cut into the existing smp stuff. smpboot.c has a mixture of stuff which is generally useful for SMP stuff (the various CPU sets, and presumably the sibling relationships are useful in principle), but also a whole pile of APIC stuff which is irrelevent to Xen. It has these exported

I'm looking at adding Xen SMP support, so I'm trying to work out what pv_ops we need, and how to cut into the existing smp stuff. smpboot.c has a mixture of stuff which is generally useful for SMP stuff (the various CPU sets, and presumably the sibling relationships are useful in principle), but also a whole pile of APIC stuff which is irrelevent to Xen. It has these exported

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

After much joy with this, I thought I post this to a bigger audience. After having migrated to Xen 4.1.1, booting HVM guests had several issues. Some related to interrupts not being set up correctly (which Stefano has posted patches) and even with those 3.0 guests seem to hang for me while 2.6.38 or older kernels were ok. After digging deeply into this, I think I found the issue. However, if that

The only member of that structure is startup_ipi_hook which is always set to paravirt_nop. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/paravirt.h | 9 --------- arch/x86/include/asm/paravirt_types.h | 10 ---------- arch/x86/include/asm/smp.h | 3 --- arch/x86/kernel/paravirt.c | 8 -------- arch/x86/kernel/smpboot.c

The only member of that structure is startup_ipi_hook which is always set to paravirt_nop. Signed-off-by: Juergen Gross <jgross at suse.com> --- arch/x86/include/asm/paravirt.h | 9 --------- arch/x86/include/asm/paravirt_types.h | 10 ---------- arch/x86/include/asm/smp.h | 3 --- arch/x86/kernel/paravirt.c | 8 -------- arch/x86/kernel/smpboot.c

There are cases where a guest tries to switch spinlocks to bare metal behavior (e.g. by setting "xen_nopvspin" boot parameter). Today this has the downside of falling back to unfair test and set scheme for qspinlocks due to virt_spin_lock() detecting the virtualized environment. Add a static key controlling whether virt_spin_lock() should be called or not. When running on bare metal set

On 09/06/2017 11:29 AM, Juergen Gross wrote: > There are cases where a guest tries to switch spinlocks to bare metal > behavior (e.g. by setting "xen_nopvspin" boot parameter). Today this > has the downside of falling back to unfair test and set scheme for > qspinlocks due to virt_spin_lock() detecting the virtualized > environment. > > Add a static key controlling

On 09/06/2017 11:29 AM, Juergen Gross wrote: > There are cases where a guest tries to switch spinlocks to bare metal > behavior (e.g. by setting "xen_nopvspin" boot parameter). Today this > has the downside of falling back to unfair test and set scheme for > qspinlocks due to virt_spin_lock() detecting the virtualized > environment. > > Add a static key controlling

There are cases where a guest tries to switch spinlocks to bare metal behavior (e.g. by setting "xen_nopvspin" boot parameter). Today this has the downside of falling back to unfair test and set scheme for qspinlocks due to virt_spin_lock() detecting the virtualized environment. Make virt_spin_lock() a paravirt operation in order to enable users to select an explicit behavior like bare

Zhang, Xiantao wrote: >>From 697d50286088e98da5ac8653c80aaa96c81abf87 Mon Sep 17 00:00:00 2001 > From: Xiantao Zhang <xiantao.zhang at intel.com> > Date: Mon, 31 Mar 2008 09:50:24 +0800 > Subject: [PATCH] KVM:IA64: Implement smp_call_function_mask for ia64 > > This function provides more flexible interface for smp > infrastructure. > Signed-off-by: Xiantao Zhang

Zhang, Xiantao wrote: >>From 697d50286088e98da5ac8653c80aaa96c81abf87 Mon Sep 17 00:00:00 2001 > From: Xiantao Zhang <xiantao.zhang at intel.com> > Date: Mon, 31 Mar 2008 09:50:24 +0800 > Subject: [PATCH] KVM:IA64: Implement smp_call_function_mask for ia64 > > This function provides more flexible interface for smp > infrastructure. > Signed-off-by: Xiantao Zhang