search for: hv_init

...y --max-requests=500000 run ... real 0m47.241s user 0m47.117s sys 0m0.008s So it seems it is worth it. As nobody seems to be strongly offended by my RFC I'm sending first non-RFC version. Patch 1 is made on top of K. Y.'s code refactoring which moved tsc page clocksource to arch/x86/hyperv/hv_init.c, this is currently present in Greg's char-misc-next tree. Changes since RFC: - Use mul_u64_u64_shr() instead of an open coded implementation [Andy Lutomirski, Thomas Gleixner] - Don't use the same pvclock_page for both VCLOCK_PVCLOCK and VCLOCK_HVCLOCK, create another one [Andy Lutom...

...y --max-requests=500000 run ... real 0m47.241s user 0m47.117s sys 0m0.008s So it seems it is worth it. As nobody seems to be strongly offended by my RFC I'm sending first non-RFC version. Patch 1 is made on top of K. Y.'s code refactoring which moved tsc page clocksource to arch/x86/hyperv/hv_init.c, this is currently present in Greg's char-misc-next tree. Changes since RFC: - Use mul_u64_u64_shr() instead of an open coded implementation [Andy Lutomirski, Thomas Gleixner] - Don't use the same pvclock_page for both VCLOCK_PVCLOCK and VCLOCK_HVCLOCK, create another one [Andy Lutom...

...so from migrating between CPUs) I'd like to send v2 with some modifications to keep the discussion going. Changes since v1: - Document the TSC page reading protocol [Thomas Gleixner]. - Separate the TSC page reading code from read_hv_clock_tsc() and put it to asm/mshyperv.h to use from both hv_init.c and vdso. - Add explicit barriers [Thomas Gleixner] Original description: Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol defined by the hypervisor is different from VCLOCK_PVCLOCK. Implemented the required support. Simple sysbench test shows the following results: Be...

...so from migrating between CPUs) I'd like to send v2 with some modifications to keep the discussion going. Changes since v1: - Document the TSC page reading protocol [Thomas Gleixner]. - Separate the TSC page reading code from read_hv_clock_tsc() and put it to asm/mshyperv.h to use from both hv_init.c and vdso. - Add explicit barriers [Thomas Gleixner] Original description: Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol defined by the hypervisor is different from VCLOCK_PVCLOCK. Implemented the required support. Simple sysbench test shows the following results: Be...

...ethod to asm/mshyperv.h x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read method arch/x86/entry/vdso/vclock_gettime.c | 24 +++++++++++++++ arch/x86/entry/vdso/vdso-layout.lds.S | 3 +- arch/x86/entry/vdso/vdso2c.c | 3 ++ arch/x86/entry/vdso/vma.c | 7 +++++ arch/x86/hyperv/hv_init.c | 48 +++++++++-------------------- arch/x86/include/asm/clocksource.h | 3 +- arch/x86/include/asm/mshyperv.h | 58 +++++++++++++++++++++++++++++++++++ arch/x86/include/asm/vdso.h | 1 + drivers/hv/Kconfig | 3 ++ 9 files changed, 114 insertio...

...ethod to asm/mshyperv.h x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read method arch/x86/entry/vdso/vclock_gettime.c | 24 +++++++++++++++ arch/x86/entry/vdso/vdso-layout.lds.S | 3 +- arch/x86/entry/vdso/vdso2c.c | 3 ++ arch/x86/entry/vdso/vma.c | 7 +++++ arch/x86/hyperv/hv_init.c | 48 +++++++++-------------------- arch/x86/include/asm/clocksource.h | 3 +- arch/x86/include/asm/mshyperv.h | 58 +++++++++++++++++++++++++++++++++++ arch/x86/include/asm/vdso.h | 1 + drivers/hv/Kconfig | 3 ++ 9 files changed, 114 insertio...

...it. What do you think? Vitaly Kuznetsov (2): hyperv: implement hv_get_tsc_page() x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read method arch/x86/entry/vdso/vclock_gettime.c | 48 ++++++++++++++++++++++++++++++++++++ arch/x86/entry/vdso/vma.c | 26 +++++++++++++------ arch/x86/hyperv/hv_init.c | 8 ++++++ arch/x86/include/asm/clocksource.h | 3 ++- arch/x86/include/asm/mshyperv.h | 8 ++++++ drivers/hv/Kconfig | 5 ++++ 6 files changed, 90 insertions(+), 8 deletions(-) -- 2.9.3

...it. What do you think? Vitaly Kuznetsov (2): hyperv: implement hv_get_tsc_page() x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read method arch/x86/entry/vdso/vclock_gettime.c | 48 ++++++++++++++++++++++++++++++++++++ arch/x86/entry/vdso/vma.c | 26 +++++++++++++------ arch/x86/hyperv/hv_init.c | 8 ++++++ arch/x86/include/asm/clocksource.h | 3 ++- arch/x86/include/asm/mshyperv.h | 8 ++++++ drivers/hv/Kconfig | 5 ++++ 6 files changed, 90 insertions(+), 8 deletions(-) -- 2.9.3

To use Hyper-V TSC page clocksource from vDSO we need to make tsc_pg available. Implement hv_get_tsc_page() and add CONFIG_HYPERV_TSCPAGE to make #ifdef-s simple. Signed-off-by: Vitaly Kuznetsov <vkuznets at redhat.com> --- arch/x86/hyperv/hv_init.c | 9 +++++++-- arch/x86/include/asm/mshyperv.h | 8 ++++++++ drivers/hv/Kconfig | 3 +++ 3 files changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index b371d0e..0ce8485 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arc...

...eloped-by: Lillian Grassin-Drake <ligrassi at microsoft.com> > Co-Developed-by: Sunil Muthuswamy <sunilmut at microsoft.com> > Co-Developed-by: Nuno Das Neves <nudasnev at microsoft.com> > Signed-off-by: Wei Liu <wei.liu at kernel.org> > --- > arch/x86/hyperv/hv_init.c | 26 ++++++++++++++++++++++++-- > 1 file changed, 24 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c > index 0eec1ed32023..26233aebc86c 100644 > --- a/arch/x86/hyperv/hv_init.c > +++ b/arch/x86/hyperv/hv_init.c > @@ -25,6...

...> Signed-off-by: Lillian Grassin-Drake <ligrassi at microsoft.com> >> > > Co-Developed-by: Lillian Grassin-Drake <ligrassi at microsoft.com> >> > > Signed-off-by: Wei Liu <wei.liu at kernel.org> >> > > --- >> > > arch/x86/hyperv/hv_init.c | 45 +++++++++++++++++++++++++++++---- >> > > arch/x86/include/asm/mshyperv.h | 1 + >> > > 2 files changed, 41 insertions(+), 5 deletions(-) >> > > >> > > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c >> > >...

...at microsoft.com> >> > Co-Developed-by: Sunil Muthuswamy <sunilmut at microsoft.com> >> > Co-Developed-by: Nuno Das Neves <nudasnev at microsoft.com> >> > Signed-off-by: Wei Liu <wei.liu at kernel.org> >> > --- >> > arch/x86/hyperv/hv_init.c | 26 ++++++++++++++++++++++++-- >> > 1 file changed, 24 insertions(+), 2 deletions(-) >> > >> > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c >> > index 0eec1ed32023..26233aebc86c 100644 >> > --- a/arch/x86/hyperv/hv_init.c >&g...

...ed the partition ID for executing some hypercalls later. > > Signed-off-by: Lillian Grassin-Drake <ligrassi at microsoft.com> > Co-Developed-by: Sunil Muthuswamy <sunilmut at microsoft.com> > Signed-off-by: Wei Liu <wei.liu at kernel.org> > --- > arch/x86/hyperv/hv_init.c | 26 ++++++++++++++++++++++++++ > arch/x86/include/asm/mshyperv.h | 2 ++ > include/asm-generic/hyperv-tlfs.h | 6 ++++++ > 3 files changed, 34 insertions(+) > > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c > index ebba4be4185d..0eec1ed32023 10...

...results when Linux runs as the root > partition. > > Signed-off-by: Lillian Grassin-Drake <ligrassi at microsoft.com> > Co-Developed-by: Lillian Grassin-Drake <ligrassi at microsoft.com> > Signed-off-by: Wei Liu <wei.liu at kernel.org> > --- > arch/x86/hyperv/hv_init.c | 45 +++++++++++++++++++++++++++++---- > arch/x86/include/asm/mshyperv.h | 1 + > 2 files changed, 41 insertions(+), 5 deletions(-) > > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c > index cac8e4c56261..ebba4be4185d 100644 > --- a/arch/x86/hyperv/hv...

...Add explicit barriers to prevent re-ordering (we need to read sequence strictly before and after) - Use mul_u64_u64_shr() instead of assembly, gcc generates a single 'mul' instruction on x86_64 anyway. Signed-off-by: Vitaly Kuznetsov <vkuznets at redhat.com> --- arch/x86/hyperv/hv_init.c | 36 ++++------------------------- arch/x86/include/asm/mshyperv.h | 50 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 54 insertions(+), 32 deletions(-) diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index 6b64cae..63dd00e 100644 --- a/arch/x86/hyperv/hv_i...

...Co-Developed-by: Sunil Muthuswamy <sunilmut at microsoft.com> >> >> > Co-Developed-by: Nuno Das Neves <nudasnev at microsoft.com> >> >> > Signed-off-by: Wei Liu <wei.liu at kernel.org> >> >> > --- >> >> > arch/x86/hyperv/hv_init.c | 26 ++++++++++++++++++++++++-- >> >> > 1 file changed, 24 insertions(+), 2 deletions(-) >> >> > >> >> > diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c >> >> > index 0eec1ed32023..26233aebc86c 100644 >> >&gt...

...t: [PATCH 1/2] hyperv: implement hv_get_tsc_page() To use Hyper-V TSC page clocksource from vDSO we need to make tsc_pg available. Implement hv_get_tsc_page() and add CONFIG_HYPERV_TSCPAGE to make #ifdef-s simple. Signed-off-by: Vitaly Kuznetsov <vkuznets at redhat.com> --- arch/x86/hyperv/hv_init.c | 9 +++++++-- arch/x86/include/asm/mshyperv.h | 8 ++++++++ drivers/hv/Kconfig | 3 +++ 3 files changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index b371d0e..0ce8485 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arc...

...t: [PATCH 1/2] hyperv: implement hv_get_tsc_page() To use Hyper-V TSC page clocksource from vDSO we need to make tsc_pg available. Implement hv_get_tsc_page() and add CONFIG_HYPERV_TSCPAGE to make #ifdef-s simple. Signed-off-by: Vitaly Kuznetsov <vkuznets at redhat.com> --- arch/x86/hyperv/hv_init.c | 9 +++++++-- arch/x86/include/asm/mshyperv.h | 8 ++++++++ drivers/hv/Kconfig | 3 +++ 3 files changed, 18 insertions(+), 2 deletions(-) diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index b371d0e..0ce8485 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arc...

...s VCLOCK_PVCLOCK is mutually exclusive with VCLOCK_HVCLOCK at run time. Signed-off-by: Vitaly Kuznetsov <vkuznets at redhat.com> --- arch/x86/entry/vdso/vclock_gettime.c | 48 ++++++++++++++++++++++++++++++++++++ arch/x86/entry/vdso/vma.c | 26 +++++++++++++------ arch/x86/hyperv/hv_init.c | 3 +++ arch/x86/include/asm/clocksource.h | 3 ++- 4 files changed, 72 insertions(+), 8 deletions(-) diff --git a/arch/x86/entry/vdso/vclock_gettime.c b/arch/x86/entry/vdso/vclock_gettime.c index 9d4d6e1..93e9dcd 100644 --- a/arch/x86/entry/vdso/vclock_gettime.c +++ b/arch/x86/e...

...dmitry.torokhov at gmail.com > Cc: xdeguillard at vmware.com > Cc: moltmann at vmware.com > Cc: arnd at arndb.de > Cc: gregkh at linuxfoundation.org > Cc: linux-input at vger.kernel.org > > Signed-off-by: Juergen Gross <jgross at suse.com> > --- > arch/x86/hyperv/hv_init.c | 2 +- > arch/x86/include/asm/hypervisor.h | 23 ++++++++++++++--------- > arch/x86/kernel/cpu/hypervisor.c | 12 +++++++++--- > arch/x86/kernel/cpu/mshyperv.c | 4 ++-- > arch/x86/kernel/cpu/vmware.c | 4 ++-- > arch/x86/kernel/kvm.c | 4 ++-- >...