kernel.git/arch/x86/kernel/cpu/mshyperv.c, branch linux-4.14.y

x86: hyperv: report value of misc_features

2020-05-02T15:24:43Z

[ Upstream commit 97d9f1c43bedd400301d6f1eff54d46e8c636e47 ] A few kernel features depend on ms_hyperv.misc_features, but unlike its siblings ->features and ->hints, the value was never reported during boot. Signed-off-by: Olaf Hering Link: https://lore.kernel.org/r/20200407172739.31371-1-olaf@aepfle.de Signed-off-by: Wei Liu Signed-off-by: Sasha Levin

x86/hyper-v: Enable PIT shutdown quirk

2018-11-21T08:24:10Z

commit 1de72c706488b7be664a601cf3843bd01e327e58 upstream. Hyper-V emulation of the PIT has a quirk such that the normal PIT shutdown path doesn't work, because clearing the counter register restarts the timer. Disable the counter clearing on PIT shutdown. Signed-off-by: Michael Kelley Signed-off-by: Thomas Gleixner Cc: "gregkh@linuxfoundation.org" Cc: "devel@linuxdriverproject.org" Cc: "daniel.lezcano@linaro.org" Cc: "virtualization@lists.linux-foundation.org" Cc: "jgross@suse.com" Cc: "akataria@vmware.com" Cc: "olaf@aepfle.de" Cc: "apw@canonical.com" Cc: vkuznets Cc: "jasowang@redhat.com" Cc: "marcelo.cerri@canonical.com" Cc: KY Srinivasan Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/1541303219-11142-3-git-send-email-mikelley@microsoft.com Signed-off-by: Greg Kroah-Hartman

x86/virt: Add enum for hypervisors to replace x86_hyper

2017-12-25T13:26:20Z

commit 03b2a320b19f1424e9ac9c21696be9c60b6d0d93 upstream. The x86_hyper pointer is only used for checking whether a virtual device is supporting the hypervisor the system is running on. Use an enum for that purpose instead and drop the x86_hyper pointer. Signed-off-by: Juergen Gross Acked-by: Thomas Gleixner Acked-by: Xavier Deguillard Cc: Linus Torvalds Cc: Peter Zijlstra Cc: akataria@vmware.com Cc: arnd@arndb.de Cc: boris.ostrovsky@oracle.com Cc: devel@linuxdriverproject.org Cc: dmitry.torokhov@gmail.com Cc: gregkh@linuxfoundation.org Cc: haiyangz@microsoft.com Cc: kvm@vger.kernel.org Cc: kys@microsoft.com Cc: linux-graphics-maintainer@vmware.com Cc: linux-input@vger.kernel.org Cc: moltmann@vmware.com Cc: pbonzini@redhat.com Cc: pv-drivers@vmware.com Cc: rkrcmar@redhat.com Cc: sthemmin@microsoft.com Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/20171109132739.23465-3-jgross@suse.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

x86/virt, x86/platform: Merge 'struct x86_hyper' into 'struct x86_platform' and 'struct x86_init'

2017-12-25T13:26:20Z

commit f72e38e8ec8869ac0ba5a75d7d2f897d98a1454e upstream. Instead of x86_hyper being either NULL on bare metal or a pointer to a struct hypervisor_x86 in case of the kernel running as a guest merge the struct into x86_platform and x86_init. This will remove the need for wrappers making it hard to find out what is being called. With dummy functions added for all callbacks testing for a NULL function pointer can be removed, too. Suggested-by: Ingo Molnar Signed-off-by: Juergen Gross Acked-by: Thomas Gleixner Cc: Linus Torvalds Cc: Peter Zijlstra Cc: akataria@vmware.com Cc: boris.ostrovsky@oracle.com Cc: devel@linuxdriverproject.org Cc: haiyangz@microsoft.com Cc: kvm@vger.kernel.org Cc: kys@microsoft.com Cc: pbonzini@redhat.com Cc: rkrcmar@redhat.com Cc: rusty@rustcorp.com.au Cc: sthemmin@microsoft.com Cc: virtualization@lists.linux-foundation.org Cc: xen-devel@lists.xenproject.org Link: http://lkml.kernel.org/r/20171109132739.23465-2-jgross@suse.com Signed-off-by: Ingo Molnar Signed-off-by: Greg Kroah-Hartman

x86/hyper-V: Allocate the IDT entry early in boot

2017-09-13T09:02:26Z

Allocate the hypervisor callback IDT entry early in the boot sequence. The previous code would allocate the entry as part of registering the handler when the vmbus driver loaded, and this caused a problem for the IDT cleanup that Thomas is working on for v4.15. Signed-off-by: K. Y. Srinivasan Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: apw@canonical.com Cc: devel@linuxdriverproject.org Cc: gregkh@linuxfoundation.org Cc: jasowang@redhat.com Cc: olaf@aepfle.de Link: http://lkml.kernel.org/r/20170908231557.2419-1-kys@exchange.microsoft.com Signed-off-by: Ingo Molnar

Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2017-09-07T16:25:15Z

Pull x86 platform updates from Ingo Molnar: "The main changes include various Hyper-V optimizations such as faster hypercalls and faster/better TLB flushes - and there's also some Intel-MID cleanups" * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: tracing/hyper-v: Trace hyperv_mmu_flush_tlb_others() x86/hyper-v: Support extended CPU ranges for TLB flush hypercalls x86/platform/intel-mid: Make several arrays static, to make code smaller MAINTAINERS: Add missed file for Hyper-V x86/hyper-v: Use hypercall for remote TLB flush hyper-v: Globalize vp_index x86/hyper-v: Implement rep hypercalls hyper-v: Use fast hypercall for HVCALL_SIGNAL_EVENT x86/hyper-v: Introduce fast hypercall implementation x86/hyper-v: Make hv_do_hypercall() inline x86/hyper-v: Include hyperv/ only when CONFIG_HYPERV is set x86/platform/intel-mid: Make 'bt_sfi_data' const x86/platform/intel-mid: Make IRQ allocation a bit more flexible x86/platform/intel-mid: Group timers callbacks together

Merge tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

2017-09-05T18:08:17Z

Pull char/misc driver updates from Greg KH: "Here is the big char/misc driver update for 4.14-rc1. Lots of different stuff in here, it's been an active development cycle for some reason. Highlights are: - updated binder driver, this brings binder up to date with what shipped in the Android O release, plus some more changes that happened since then that are in the Android development trees. - coresight updates and fixes - mux driver file renames to be a bit "nicer" - intel_th driver updates - normal set of hyper-v updates and changes - small fpga subsystem and driver updates - lots of const code changes all over the driver trees - extcon driver updates - fmc driver subsystem upadates - w1 subsystem minor reworks and new features and drivers added - spmi driver updates Plus a smattering of other minor driver updates and fixes. All of these have been in linux-next with no reported issues for a while" * tag 'char-misc-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (244 commits) ANDROID: binder: don't queue async transactions to thread. ANDROID: binder: don't enqueue death notifications to thread todo. ANDROID: binder: Don't BUG_ON(!spin_is_locked()). ANDROID: binder: Add BINDER_GET_NODE_DEBUG_INFO ioctl ANDROID: binder: push new transactions to waiting threads. ANDROID: binder: remove proc waitqueue android: binder: Add page usage in binder stats android: binder: fixup crash introduced by moving buffer hdr drivers: w1: add hwmon temp support for w1_therm drivers: w1: refactor w1_slave_show to make the temp reading functionality separate drivers: w1: add hwmon support structures eeprom: idt_89hpesx: Support both ACPI and OF probing mcb: Fix an error handling path in 'chameleon_parse_cells()' MCB: add support for SC31 to mcb-lpc mux: make device_type const char: virtio: constify attribute_group structures. Documentation/ABI: document the nvmem sysfs files lkdtm: fix spelling mistake: "incremeted" -> "incremented" perf: cs-etm: Fix ETMv4 CONFIGR entry in perf.data file nvmem: include linux/err.h from header ...

x86/idt: Simplify alloc_intr_gate()

2017-08-29T10:07:28Z

The only users of alloc_intr_gate() are hypervisors, which both check the used_vectors bitmap whether they have allocated the gate already. Move that check into alloc_intr_gate() and simplify the users. Signed-off-by: Thomas Gleixner Reviewed-by: Juergen Gross Reviewed-by: K. Y. Srinivasan Cc: Andy Lutomirski Cc: Boris Ostrovsky Cc: Borislav Petkov Cc: Brian Gerst Cc: Denys Vlasenko Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stephen Hemminger Cc: Steven Rostedt Link: http://lkml.kernel.org/r/20170828064959.580830286@linutronix.de Signed-off-by: Ingo Molnar

x86/hyper-v: Use hypercall for remote TLB flush

2017-08-10T18:16:44Z

Hyper-V host can suggest us to use hypercall for doing remote TLB flush, this is supposed to work faster than IPIs. Implementation details: to do HvFlushVirtualAddress{Space,List} hypercalls we need to put the input somewhere in memory and we don't really want to have memory allocation on each call so we pre-allocate per cpu memory areas on boot. pv_ops patching is happening very early so we need to separate hyperv_setup_mmu_ops() and hyper_alloc_mmu(). It is possible and easy to implement local TLB flushing too and there is even a hint for that. However, I don't see a room for optimization on the host side as both hypercall and native tlb flush will result in vmexit. The hint is also not set on modern Hyper-V versions. Signed-off-by: Vitaly Kuznetsov Reviewed-by: Andy Shevchenko Reviewed-by: Stephen Hemminger Cc: Andy Lutomirski Cc: Haiyang Zhang Cc: Jork Loeser Cc: K. Y. Srinivasan Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Simon Xiao Cc: Steven Rostedt Cc: Thomas Gleixner Cc: devel@linuxdriverproject.org Link: http://lkml.kernel.org/r/20170802160921.21791-8-vkuznets@redhat.com Signed-off-by: Ingo Molnar

x86/hyper-v: stash the max number of virtual/logical processor

2017-07-17T15:20:28Z

Max virtual processor will be needed for 'extended' hypercalls supporting more than 64 vCPUs. While on it, unify on 'Hyper-V' in mshyperv.c as we currently have a mix, report acquired misc features as well. Signed-off-by: Vitaly Kuznetsov Reviewed-by: Andy Shevchenko Signed-off-by: K. Y. Srinivasan Signed-off-by: Greg Kroah-Hartman