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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(+) -- 2.10.1

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(+) -- 2.10.1

...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 function - paravi...

...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 function - paravi...

Hello, This patchset introduces steal time accounting support for the VMware guest. The idea and implementation of guest steal time support is similar to KVM ones and it is based on steal clock. The steal clock is a per CPU structure in a shared memory between hypervisor and guest, initialized by each CPU through hypercall. Steal clock is got updated by the hypervisor and read by the guest. The

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

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

...ift/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.txt b/Documen...

...c_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 +++ b/arch/x8...

...c_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 +++ b/arch/x8...

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 5130985..46c7b9d...

.... 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/cpu/vmware.c...

..."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/cpu/vmware.c...

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 --- a/arch/x86/k...

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..efb22fa76ba4 100644...

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 5130985..46c7b9d...

...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.txt b/Documen...

..."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 Chamberlain &l...