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This patchset includes several VMware guest improvements: Alexey Makhalov (3): x86/vmware: Use tsc_khz value for calibrate_cpu() x86/vmware: Add basic paravirt ops support x86/vmware: Add paravirt sched clock Documentation/kernel-parameters.txt | 4 +++ arch/x86/kernel/cpu/vmware.c | 51 +++++++++++++++++++++++++++++++++++++ 2 files changed, 55 insertions...

This patchset includes several VMware guest improvements: Alexey Makhalov (3): x86/vmware: Use tsc_khz value for calibrate_cpu() x86/vmware: Add basic paravirt ops support x86/vmware: Add paravirt sched clock Documentation/kernel-parameters.txt | 4 +++ arch/x86/kernel/cpu/vmware.c | 51 +++++++++++++++++++++++++++++++++++++ 2 files changed, 55 insertions...

...hz == 0) tsc_khz = cpu_khz; else if (abs(cpu_khz - tsc_khz) * 10 > tsc_khz) cpu_khz = tsc_khz; We want the cpu_khz and tsc_khz to be sync even if they diverge less then 10%. This patch resolves this issue by setting x86_platform.calibrate_cpu to vmware_get_tsc_khz(). Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Acked-by: Alok N Kataria <akataria at vmware.com> --- arch/x86/kernel/cpu/vmware.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 4e34da4b..480790f 100644 --- a/arch/x86/kernel/cpu/vmware.c...

...hz == 0) tsc_khz = cpu_khz; else if (abs(cpu_khz - tsc_khz) * 10 > tsc_khz) cpu_khz = tsc_khz; We want the cpu_khz and tsc_khz to be sync even if they diverge less then 10%. This patch resolves this issue by setting x86_platform.calibrate_cpu to vmware_get_tsc_khz(). Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Acked-by: Alok N Kataria <akataria at vmware.com> --- arch/x86/kernel/cpu/vmware.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 4e34da4b..480790f 100644 --- a/arch/x86/kernel/cpu/vmware.c...

...reparation for the main patch. 3. x86/vmware: Steal time clock for VMware guest Core steal time support functionality. 4. x86/vmware: Enable steal time accounting Support for steal time accounting used by update_rq_clock(). 5. x86/vmware: Use bool type for vmw_sched_clock Minor clean up. Alexey Makhalov (5): x86/vmware: Make vmware_select_hypercall() __init x86/vmware: Remove vmware_sched_clock_setup() x86/vmware: Steal time clock for VMware guest x86/vmware: Enable steal time accounting x86/vmware: Use bool type for vmw_sched_clock Documentation/admin-guide/kernel-parameters.txt | 2...

Thanks Thomas for the valuable comments. Changelog for the updated patchset: v1->v2 - Update pvinfo.name. v2->v3 - Address comments from Thomas G, * Created separate function: vmware_sched_clock_setup() (patch 3/3) * Updated commit descriptions for 1/3 and 3/3 Alexey Makhalov (3): x86/vmware: Use tsc_khz value for calibrate_cpu() x86/vmware: Add basic paravirt ops support x86/vmware: Add paravirt sched clock Documentation/kernel-parameters.txt | 4 +++ arch/x86/kernel/cpu/vmware.c | 55 +++++++++++++++++++++++++++++++++++++ 2 files changed, 59 insertions...

Thanks Thomas for the valuable comments. Changelog for the updated patchset: v1->v2 - Update pvinfo.name. v2->v3 - Address comments from Thomas G, * Created separate function: vmware_sched_clock_setup() (patch 3/3) * Updated commit descriptions for 1/3 and 3/3 Alexey Makhalov (3): x86/vmware: Use tsc_khz value for calibrate_cpu() x86/vmware: Add basic paravirt ops support x86/vmware: Add paravirt sched clock Documentation/kernel-parameters.txt | 4 +++ arch/x86/kernel/cpu/vmware.c | 55 +++++++++++++++++++++++++++++++++++++ 2 files changed, 59 insertions...

...y to mean the company. So we can say "running on VMware ESXi" or "running in a VMware virtual machine", but "running on VMware" is wrong. There is supposedly some good legal reason for this related to keeping our trademark. On Tue, 25 Oct 2016 22:26:00 -0700, Alexey Makhalov <amakhalov at vmware.com> wrote: > Add basic paravirt support: > 1. set pv_info.name to "VMware" to have proper boot log message > Booting paravirtualized kernel on VMware > instead of "... on bare hardware" > 2. set pv_cpu_ops.io_delay() to empty fun...

...y to mean the company. So we can say "running on VMware ESXi" or "running in a VMware virtual machine", but "running on VMware" is wrong. There is supposedly some good legal reason for this related to keeping our trademark. On Tue, 25 Oct 2016 22:26:00 -0700, Alexey Makhalov <amakhalov at vmware.com> wrote: > Add basic paravirt support: > 1. set pv_info.name to "VMware" to have proper boot log message > Booting paravirtualized kernel on VMware > instead of "... on bare hardware" > 2. set pv_cpu_ops.io_delay() to empty fun...

...er of mult/shift/offset triplets and preempt toggling. Since VMware hypervisor provides constant tsc we can use constant mult/shift/offset triplet calculated at boot time. no-vmw-sched-clock kernel parameter is added to switch back to the native_sched_clock() implementation. Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Acked-by: Alok N Kataria <akataria at vmware.com> --- Documentation/kernel-parameters.txt | 4 ++++ arch/x86/kernel/cpu/vmware.c | 38 +++++++++++++++++++++++++++++++++++++ 2 files changed, 42 insertions(+) diff --git a/Documentation/kernel-parameters...

On Tue, 25 Oct 2016, Alexey Makhalov wrote: > no-vmw-sched-clock kernel parameter is added to switch back to the > native_sched_clock() implementation. You are not switching back. The parameter is used to disable the paravirt sched clock. > #ifdef CONFIG_PARAVIRT > +static struct cyc2ns_data vmware_cyc2ns __ro_after_ini...

On Thu, 27 Oct 2016, Alexey Makhalov wrote: > Set pv_time_ops.sched_clock to vmware_sched_clock(). Please do not describe WHAT the patch does, describe why. Describe the problem you are solving. I can see from the patch > + pv_time_ops.sched_clock = vmware_sched_clock; that you set pv_time_ops.sched_clock to vmware_sched_c...

Re-factor the vmware platform setup code to query the hypervisor for tsc frequency only once during boot. Since the VMware hypervisor guarantees constant TSC, calibrate_tsc now uses the saved value. Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Acked-by: Alok N Kataria <akataria at vmware.com> --- arch/x86/kernel/cpu/vmware.c | 37 ++++++++++++++++++------------------- 1 file changed, 18 insertions(+), 19 deletions(-) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 513...

...t support: 1. set pv_info.name to "VMware" to have proper boot log message Booting paravirtualized kernel on VMware instead of "... on bare hardware" 2. set pv_cpu_ops.io_delay() to empty function - paravirt_nop() to avoid vm-exits on IO delays. Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Acked-by: Alok N Kataria <akataria at vmware.com> --- arch/x86/kernel/cpu/vmware.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 480790f..e3fb320 100644 --- a/arch/x86/kernel...

...info.name to "VMware hypervisor" to have proper boot log message Booting paravirtualized kernel on VMware hypervisor instead of "... on bare hardware" 2. set pv_cpu_ops.io_delay() to empty function - paravirt_nop() to avoid vm-exits on IO delays. Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Acked-by: Alok N Kataria <akataria at vmware.com> --- arch/x86/kernel/cpu/vmware.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 480790f..098a524 100644 --- a/arch/x86/kernel...

vmware_select_hypercall() is used only by the __init functions, and should be annotated with __init as well. Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Reviewed-by: Thomas Hellstrom <thellstrom at vmware.com> --- arch/x86/kernel/cpu/vmware.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 46d732696c1c..d280560fd75e 100644 --...

Move cyc2ns setup logic to separate function. This separation will allow to use cyc2ns mult/shift pair not only for the sched_clock but also for other clocks such as steal_clock. Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Reviewed-by: Thomas Hellstrom <thellstrom at vmware.com> --- arch/x86/kernel/cpu/vmware.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index d280560fd75e..efb22...

Re-factor the vmware platform setup code to query the hypervisor for tsc frequency only once during boot. Since the VMware hypervisor guarantees constant TSC, calibrate_tsc now uses the saved value. Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Acked-by: Alok N Kataria <akataria at vmware.com> --- arch/x86/kernel/cpu/vmware.c | 37 ++++++++++++++++++------------------- 1 file changed, 18 insertions(+), 19 deletions(-) diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index 513...

...ck() without ring buffer of mult/shift/offset triplets and preempt toggling. Since VMware hypervisor provides constant tsc we can use constant mult/shift/offset triplet calculated at boot time. no-vmw-sched-clock kernel parameter is added to disable the paravirt sched clock. Signed-off-by: Alexey Makhalov <amakhalov at vmware.com> Acked-by: Alok N Kataria <akataria at vmware.com> --- Documentation/kernel-parameters.txt | 4 ++++ arch/x86/kernel/cpu/vmware.c | 41 +++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/Documentation/kernel-parameters...

...ops" to "low-level" since "low-ops" isn't defined or even mentioned anywhere else in the kernel source tree. Signed-off-by: Randy Dunlap <rdunlap at infradead.org> Cc: Juergen Gross <jgross at suse.com> Cc: Ajay Kaher <akaher at vmware.com> Cc: Alexey Makhalov <amakhalov at vmware.com> Cc: VMware PV-Drivers Reviewers <pv-drivers at vmware.com> Cc: virtualization at lists.linux-foundation.org Cc: x86 at kernel.org Cc: Paolo Bonzini <pbonzini at redhat.com> Cc: "Luke Nowakowski-Krijger" <lnowakow at eng.ucsd.edu> Cc: Luis...