linux.git/arch/x86/hyperv, branch v4.18

x86/hyper-v: Fix the circular dependency in IPI enlightenment

2018-07-06T10:32:59+00:00

The IPI hypercalls depend on being able to map the Linux notion of CPU ID
to the hypervisor's notion of the CPU ID. The array hv_vp_index[] provides
this mapping. Code for populating this array depends on the IPI functionality.
Break this circular dependency.

[ tglx: Use a proper define instead of '-1' with a u32 variable as pointed
  	out by Vitaly ]

Fixes: 68bb7bfb7985 ("X86/Hyper-V: Enable IPI enlightenments")
Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Thomas Gleixner 
Tested-by: Michael Kelley 
Cc: gregkh@linuxfoundation.org
Cc: devel@linuxdriverproject.org
Cc: olaf@aepfle.de
Cc: apw@canonical.com
Cc: jasowang@redhat.com
Cc: hpa@zytor.com
Cc: sthemmin@microsoft.com
Cc: Michael.H.Kelley@microsoft.com
Cc: vkuznets@redhat.com
Link: https://lkml.kernel.org/r/20180703230155.15160-1-kys@linuxonhyperv.com

x86/hyper-v: move struct hv_flush_pcpu{,ex} definitions to common header

2018-05-26T12:14:33+00:00

Hyper-V TLB flush hypercalls definitions will be required for KVM so move
them hyperv-tlfs.h. Structures also need to be renamed as '_pcpu' suffix is
irrelevant for a general-purpose definition.

Signed-off-by: Vitaly Kuznetsov 
Signed-off-by: Radim Krčmář

x86/Hyper-V/hv_apic: Build the Hyper-V APIC conditionally

2018-05-19T19:34:11+00:00

The Hyper-V APIC code is built when CONFIG_HYPERV is enabled but the actual
code in that file is guarded with CONFIG_X86_64. There is no point in doing
this. Neither is there a point in having the CONFIG_HYPERV guard in there
because the containing directory is not built when CONFIG_HYPERV=n.

Further for the hv_init_apic() function a stub is provided only for
CONFIG_HYPERV=n, which is pointless as the callsite is not compiled at
all. But for X86_32 the stub is missing and the build fails.

Clean that up:

  - Compile hv_apic.c only when CONFIG_X86_64=y
  - Make the stub for hv_init_apic() available when CONFG_X86_64=n

Fixes: 6b48cb5f8347 ("X86/Hyper-V: Enlighten APIC access")
Reported-by: kbuild test robot 
Signed-off-by: Thomas Gleixner 
Cc: K. Y. Srinivasan 
Cc: Michael Kelley

x86/Hyper-V/hv_apic: Include asm/apic.h

2018-05-19T14:41:59+00:00

Not all configurations magically include asm/apic.h, but the Hyper-V code
requires it. Include it explicitely.

Fixes: 6b48cb5f8347 ("X86/Hyper-V: Enlighten APIC access")
Reported-by: kbuild test robot 
Signed-off-by: Thomas Gleixner 
Cc: K. Y. Srinivasan 
Cc: Michael Kelley

X86/Hyper-V: Consolidate the allocation of the hypercall input page

2018-05-19T11:23:18+00:00

Consolidate the allocation of the hypercall input page.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Michael Kelley 
Cc: olaf@aepfle.de
Cc: sthemmin@microsoft.com
Cc: gregkh@linuxfoundation.org
Cc: jasowang@redhat.com
Cc: Michael.H.Kelley@microsoft.com
Cc: hpa@zytor.com
Cc: apw@canonical.com
Cc: devel@linuxdriverproject.org
Cc: vkuznets@redhat.com
Link: https://lkml.kernel.org/r/20180516215334.6547-5-kys@linuxonhyperv.com

X86/Hyper-V: Consolidate code for converting cpumask to vpset

2018-05-19T11:23:18+00:00

Consolidate code for converting cpumask to vpset.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Michael Kelley 
Cc: olaf@aepfle.de
Cc: sthemmin@microsoft.com
Cc: gregkh@linuxfoundation.org
Cc: jasowang@redhat.com
Cc: Michael.H.Kelley@microsoft.com
Cc: hpa@zytor.com
Cc: apw@canonical.com
Cc: devel@linuxdriverproject.org
Cc: vkuznets@redhat.com
Link: https://lkml.kernel.org/r/20180516215334.6547-4-kys@linuxonhyperv.com

X86/Hyper-V: Enhanced IPI enlightenment

2018-05-19T11:23:17+00:00

Support enhanced IPI enlightenments (to target more than 64 CPUs).

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Michael Kelley 
Cc: olaf@aepfle.de
Cc: sthemmin@microsoft.com
Cc: gregkh@linuxfoundation.org
Cc: jasowang@redhat.com
Cc: Michael.H.Kelley@microsoft.com
Cc: hpa@zytor.com
Cc: apw@canonical.com
Cc: devel@linuxdriverproject.org
Cc: vkuznets@redhat.com
Link: https://lkml.kernel.org/r/20180516215334.6547-3-kys@linuxonhyperv.com

X86/Hyper-V: Enable IPI enlightenments

2018-05-19T11:23:17+00:00

Hyper-V supports hypercalls to implement IPI; use them.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Michael Kelley 
Cc: olaf@aepfle.de
Cc: sthemmin@microsoft.com
Cc: gregkh@linuxfoundation.org
Cc: jasowang@redhat.com
Cc: Michael.H.Kelley@microsoft.com
Cc: hpa@zytor.com
Cc: apw@canonical.com
Cc: devel@linuxdriverproject.org
Cc: vkuznets@redhat.com
Link: https://lkml.kernel.org/r/20180516215334.6547-2-kys@linuxonhyperv.com

X86/Hyper-V: Enlighten APIC access

2018-05-19T11:23:17+00:00

Hyper-V supports MSR based APIC access; implement
the enlightenment.

Signed-off-by: K. Y. Srinivasan 
Signed-off-by: Thomas Gleixner 
Reviewed-by: Michael Kelley 
Cc: olaf@aepfle.de
Cc: sthemmin@microsoft.com
Cc: gregkh@linuxfoundation.org
Cc: jasowang@redhat.com
Cc: Michael.H.Kelley@microsoft.com
Cc: hpa@zytor.com
Cc: apw@canonical.com
Cc: devel@linuxdriverproject.org
Cc: vkuznets@redhat.com
Link: https://lkml.kernel.org/r/20180516215334.6547-1-kys@linuxonhyperv.com

x86/hyper-v: allocate and use Virtual Processor Assist Pages

2018-03-28T20:47:06+00:00

Virtual Processor Assist Pages usage allows us to do optimized EOI
processing for APIC, enable Enlightened VMCS support in KVM and more.
struct hv_vp_assist_page is defined according to the Hyper-V TLFS v5.0b.

Signed-off-by: Vitaly Kuznetsov 
Reviewed-by: Thomas Gleixner 
Acked-by: Thomas Gleixner 
Signed-off-by: Radim Krčmář