kernel.git/arch/x86/hyperv, branch linux-4.18.y

x86/hyper-v: Check for VP_INVAL in hyperv_flush_tlb_others()

2018-08-17T19:03:47Z

commit 110d2a7fc39725d2c29d2fede4f34a35a4f98882 upstream. Commit 1268ed0c474a ("x86/hyper-v: Fix the circular dependency in IPI enlightenment") pre-filled hv_vp_index with VP_INVAL so it is now (theoretically) possible to observe hv_cpu_number_to_vp_number() returning VP_INVAL. We need to check for that in hyperv_flush_tlb_others(). Not checking for VP_INVAL on the first call site where we do if (hv_cpu_number_to_vp_number(cpumask_last(cpus)) >= 64) goto do_ex_hypercall; is OK, in case we're eligible for non-ex hypercall we'll catch the issue later in for_each_cpu() cycle and in case we'll be doing ex- hypercall cpumask_to_vpset() will fail. It would be nice to change hv_cpu_number_to_vp_number() return value's type to 'u32' but this will likely be a bigger change as all call sites need to be checked first. Fixes: 1268ed0c474a ("x86/hyper-v: Fix the circular dependency in IPI enlightenment") Signed-off-by: Vitaly Kuznetsov Signed-off-by: Thomas Gleixner Reviewed-by: Michael Kelley Cc: "K. Y. Srinivasan" Cc: Haiyang Zhang Cc: Stephen Hemminger Cc: "Michael Kelley (EOSG)" Cc: devel@linuxdriverproject.org Cc: "H. Peter Anvin" Link: https://lkml.kernel.org/r/20180709174012.17429-3-vkuznets@redhat.com Signed-off-by: Greg Kroah-Hartman

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

2018-07-06T10:32:59Z

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

2018-05-26T12:14:33Z

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

2018-05-19T19:34:11Z

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

2018-05-19T14:41:59Z

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

2018-05-19T11:23:18Z

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

2018-05-19T11:23:18Z

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

2018-05-19T11:23:17Z

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

2018-05-19T11:23:17Z

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

2018-05-19T11:23:17Z

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