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| * Drivers: hv: vmbus: Remove x86-isms from arch independent driversMichael Kelley2018-01-091-7/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | hv_is_hypercall_page_setup() is used to check if Hyper-V is initialized, but a 'hypercall page' is an x86 implementation detail that isn't necessarily present on other architectures. Rename to the architecture independent hv_is_hyperv_initialized() and add check that x86_hyper is pointing to Hyper-V. Use this function instead of direct references to x86-specific data structures in vmbus_drv.c, and remove now redundant call in hv_init(). Also remove 'x86' from the string name passed to cpuhp_setup_state(). Signed-off-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | x86/hyperv: Stop suppressing X86_FEATURE_PCIDVitaly Kuznetsov2018-01-251-2/+10
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When hypercall-based TLB flush was enabled for Hyper-V guests PCID feature was deliberately suppressed as a precaution: back then PCID was never exposed to Hyper-V guests and it wasn't clear what will happen if some day it becomes available. The day came and PCID/INVPCID features are already exposed on certain Hyper-V hosts. From TLFS (as of 5.0b) it is unclear how TLB flush hypercalls combine with PCID. In particular the usage of PCID is per-cpu based: the same mm gets different CR3 values on different CPUs. If the hypercall does exact matching this will fail. However, this is not the case. David Zhang explains: "In practice, the AddressSpace argument is ignored on any VM that supports PCIDs. Architecturally, the AddressSpace argument must match the CR3 with PCID bits stripped out (i.e., the low 12 bits of AddressSpace should be 0 in long mode). The flush hypercalls flush all PCIDs for the specified AddressSpace." With this, PCID can be enabled. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: David Zhang <dazhan@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: "Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: devel@linuxdriverproject.org Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: Aditya Bhandari <adityabh@microsoft.com> Link: https://lkml.kernel.org/r/20180124103629.29980-1-vkuznets@redhat.com
* Merge tag 'char-misc-4.15-rc1' of ↵Linus Torvalds2017-11-161-6/+9
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc updates from Greg KH: "Here is the big set of char/misc and other driver subsystem patches for 4.15-rc1. There are small changes all over here, hyperv driver updates, pcmcia driver updates, w1 driver updats, vme driver updates, nvmem driver updates, and lots of other little one-off driver updates as well. The shortlog has the full details. All of these have been in linux-next for quite a while with no reported issues" * tag 'char-misc-4.15-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (90 commits) VME: Return -EBUSY when DMA list in use w1: keep balance of mutex locks and refcnts MAINTAINERS: Update VME subsystem tree. nvmem: sunxi-sid: add support for A64/H5's SID controller nvmem: imx-ocotp: Update module description nvmem: imx-ocotp: Enable i.MX7D OTP write support nvmem: imx-ocotp: Add i.MX7D timing write clock setup support nvmem: imx-ocotp: Move i.MX6 write clock setup to dedicated function nvmem: imx-ocotp: Add support for banked OTP addressing nvmem: imx-ocotp: Pass parameters via a struct nvmem: imx-ocotp: Restrict OTP write to IMX6 processors nvmem: uniphier: add UniPhier eFuse driver dt-bindings: nvmem: add description for UniPhier eFuse nvmem: set nvmem->owner to nvmem->dev->driver->owner if unset nvmem: qfprom: fix different address space warnings of sparse nvmem: mtk-efuse: fix different address space warnings of sparse nvmem: mtk-efuse: use stack for nvmem_config instead of malloc'ing it nvmem: imx-iim: use stack for nvmem_config instead of malloc'ing it thunderbolt: tb: fix use after free in tb_activate_pcie_devices MAINTAINERS: Add git tree for Thunderbolt development ...
| * Drivers: hv: vmbus: Make panic reporting to be more usefulK. Y. Srinivasan2017-10-311-6/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hyper-V allows the guest to report panic and the guest can pass additional information. All this is logged on the host. Currently Linux is passing back information that is not particularly useful. Make the following changes: 1. Windows uses crash MSR P0 to report bugcheck code. Follow the same convention for Linux as well. 2. It will be useful to know the gust ID of the Linux guest that has paniced. Pass back this information. These changes will help in better supporting Linux on Hyper-V Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | x86/virt: Add enum for hypervisors to replace x86_hyperJuergen Gross2017-11-101-1/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <jgross@suse.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Xavier Deguillard <xdeguillard@vmware.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> 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 <mingo@kernel.org>
* x86/hyperv: Fix hypercalls with extended CPU ranges for TLB flushingMarcelo Henrique Cerri2017-10-101-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Do not consider the fixed size of hv_vp_set when passing the variable header size to hv_do_rep_hypercall(). The Hyper-V hypervisor specification states that for a hypercall with a variable header only the size of the variable portion should be supplied via the input control. For HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX/LIST_EX calls that means the fixed portion of hv_vp_set should not be considered. That fixes random failures of some applications that are unexpectedly killed with SIGBUS or SIGSEGV. Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: Josh Poulson <jopoulso@microsoft.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: devel@linuxdriverproject.org Fixes: 628f54cc6451 ("x86/hyper-v: Support extended CPU ranges for TLB flush hypercalls") Link: http://lkml.kernel.org/r/1507210469-29065-1-git-send-email-marcelo.cerri@canonical.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/hyperv: Don't use percpu areas for pcpu_flush/pcpu_flush_ex structuresVitaly Kuznetsov2017-10-101-6/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | hv_do_hypercall() does virt_to_phys() translation and with some configs (CONFIG_SLAB) this doesn't work for percpu areas, we pass wrong memory to hypervisor and get #GP. We could use working slow_virt_to_phys() instead but doing so kills the performance. Move pcpu_flush/pcpu_flush_ex structures out of percpu areas and allocate memory on first call. The additional level of indirection gives us a small performance penalty, in future we may consider introducing hypercall functions which avoid virt_to_phys() conversion and cache physical addresses of pcpu_flush/pcpu_flush_ex structures somewhere. Reported-by: Simon Xiao <sixiao@microsoft.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: devel@linuxdriverproject.org Link: http://lkml.kernel.org/r/20171005113924.28021-1-vkuznets@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/hyperv: Clear vCPU banks between calls to avoid flushing unneeded vCPUsVitaly Kuznetsov2017-10-102-5/+17
| | | | | | | | | | | | | | | | | | | | | | | hv_flush_pcpu_ex structures are not cleared between calls for performance reasons (they're variable size up to PAGE_SIZE each) but we must clear hv_vp_set.bank_contents part of it to avoid flushing unneeded vCPUs. The rest of the structure is formed correctly. To do the clearing in an efficient way stash the maximum possible vCPU number (this may differ from Linux CPU id). Reported-by: Jork Loeser <Jork.Loeser@microsoft.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: devel@linuxdriverproject.org Link: http://lkml.kernel.org/r/20171006154854.18092-1-vkuznets@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* tracing/hyper-v: Trace hyperv_mmu_flush_tlb_others()Vitaly Kuznetsov2017-08-311-0/+7
| | | | | | | | | | | | | | | | | | | | | Add Hyper-V tracing subsystem and trace hyperv_mmu_flush_tlb_others(). Tracing is done the same way we do xen_mmu_flush_tlb_others(). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Cc: Andy Lutomirski <luto@kernel.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: devel@linuxdriverproject.org Link: http://lkml.kernel.org/r/20170802160921.21791-10-vkuznets@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/hyper-v: Support extended CPU ranges for TLB flush hypercallsVitaly Kuznetsov2017-08-311-3/+130
| | | | | | | | | | | | | | | | | | | | | | Hyper-V hosts may support more than 64 vCPUs, we need to use HVCALL_FLUSH_VIRTUAL_ADDRESS_SPACE_EX/LIST_EX hypercalls in this case. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: devel@linuxdriverproject.org Link: http://lkml.kernel.org/r/20170802160921.21791-9-vkuznets@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/hyper-v: Use hypercall for remote TLB flushVitaly Kuznetsov2017-08-103-1/+141
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 <vkuznets@redhat.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: devel@linuxdriverproject.org Link: http://lkml.kernel.org/r/20170802160921.21791-8-vkuznets@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* hyper-v: Globalize vp_indexVitaly Kuznetsov2017-08-101-1/+33
| | | | | | | | | | | | | | | | | | | | | | To support implementing remote TLB flushing on Hyper-V with a hypercall we need to make vp_index available outside of vmbus module. Rename and globalize. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: devel@linuxdriverproject.org Link: http://lkml.kernel.org/r/20170802160921.21791-7-vkuznets@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* x86/hyper-v: Make hv_do_hypercall() inlineVitaly Kuznetsov2017-08-101-49/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | We have only three call sites for hv_do_hypercall() and we're going to change HVCALL_SIGNAL_EVENT to doing fast hypercall so we can inline this function for optimization. Hyper-V top level functional specification states that r9-r11 registers and flags may be clobbered by the hypervisor during hypercall and with inlining this is somewhat important, add the clobbers. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Jork Loeser <Jork.Loeser@microsoft.com> Cc: K. Y. Srinivasan <kys@microsoft.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Simon Xiao <sixiao@microsoft.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: devel@linuxdriverproject.org Link: http://lkml.kernel.org/r/20170802160921.21791-3-vkuznets@redhat.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
* Merge tag 'char-misc-4.12-rc1' of ↵Linus Torvalds2017-05-051-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc Pull char/misc driver updates from Greg KH: "Here is the big set of new char/misc driver drivers and features for 4.12-rc1. There's lots of new drivers added this time around, new firmware drivers from Google, more auxdisplay drivers, extcon drivers, fpga drivers, and a bunch of other driver updates. Nothing major, except if you happen to have the hardware for these drivers, and then you will be happy :) All of these have been in linux-next for a while with no reported issues" * tag 'char-misc-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (136 commits) firmware: google memconsole: Fix return value check in platform_memconsole_init() firmware: Google VPD: Fix return value check in vpd_platform_init() goldfish_pipe: fix build warning about using too much stack. goldfish_pipe: An implementation of more parallel pipe fpga fr br: update supported version numbers fpga: region: release FPGA region reference in error path fpga altera-hps2fpga: disable/unprepare clock on error in alt_fpga_bridge_probe() mei: drop the TODO from samples firmware: Google VPD sysfs driver firmware: Google VPD: import lib_vpd source files misc: lkdtm: Add volatile to intentional NULL pointer reference eeprom: idt_89hpesx: Add OF device ID table misc: ds1682: Add OF device ID table misc: tsl2550: Add OF device ID table w1: Remove unneeded use of assert() and remove w1_log.h w1: Use kernel common min() implementation uio_mf624: Align memory regions to page size and set correct offsets uio_mf624: Refactor memory info initialization uio: Allow handling of non page-aligned memory regions hangcheck-timer: Fix typo in comment ...
| * hyperv: fix warning about missing prototypeStephen Hemminger2017-03-171-1/+1
| | | | | | | | | | | | | | | | | | Compiling with warnings enabled finds missing prototype for hv_do_hypercall. Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | x86/vdso: Add VCLOCK_HVCLOCK vDSO clock read methodVitaly Kuznetsov2017-03-111-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Hyper-V TSC page clocksource is suitable for vDSO, however, the protocol defined by the hypervisor is different from VCLOCK_PVCLOCK. Implement the required support by adding hvclock_page VVAR. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: devel@linuxdriverproject.org Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: virtualization@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20170303132142.25595-4-vkuznets@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | x86/hyperv: Move TSC reading method to asm/mshyperv.hVitaly Kuznetsov2017-03-111-32/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As a preparation to making Hyper-V TSC page suitable for vDSO move the TSC page reading logic to asm/mshyperv.h. While on it, do the following: - Document the reading algorithm. - Simplify the code a bit. - Add explicit READ_ONCE() to not rely on 'volatile'. - 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. [ tglx: Simplified the loop ] Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: devel@linuxdriverproject.org Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: virtualization@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20170303132142.25595-3-vkuznets@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | x86/hyperv: Implement hv_get_tsc_page()Vitaly Kuznetsov2017-03-111-2/+7
|/ | | | | | | | | | | | | | | | | | 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@redhat.com> Cc: Stephen Hemminger <sthemmin@microsoft.com> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: Dexuan Cui <decui@microsoft.com> Cc: Andy Lutomirski <luto@amacapital.net> Cc: devel@linuxdriverproject.org Cc: "K. Y. Srinivasan" <kys@microsoft.com> Cc: virtualization@lists.linux-foundation.org Link: http://lkml.kernel.org/r/20170303132142.25595-2-vkuznets@redhat.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* x86/hyperv: Hide unused labelArnd Bergmann2017-03-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | This new 32-bit warning just showed up: arch/x86/hyperv/hv_init.c: In function 'hyperv_init': arch/x86/hyperv/hv_init.c:167:1: error: label 'register_msr_cs' defined but not used [-Werror=unused-label] The easiest solution is to move the label up into the existing #ifdef that has the goto. Fixes: dee863b571b0 ("hv: export current Hyper-V clocksource") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Stephen Hemminger <sthemmin@microsoft.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Haiyang Zhang <haiyangz@microsoft.com> Cc: devel@linuxdriverproject.org Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: "K. Y. Srinivasan" <kys@microsoft.com> Link: http://lkml.kernel.org/r/20170214211736.2641241-1-arnd@arndb.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* drivers: hv: Turn off write permission on the hypercall pageK. Y. Srinivasan2017-02-101-1/+1
| | | | | | | | | | | | The hypercall page only needs to be executable but currently it is setup to be writable as well. Fix the issue. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Cc: <stable@vger.kernel.org> Acked-by: Kees Cook <keescook@chromium.org> Reported-by: Stephen Hemminger <stephen@networkplumber.org> Tested-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* hv: export current Hyper-V clocksourceVitaly Kuznetsov2017-02-101-4/+9
| | | | | | | | | | As a preparation to implementing Hyper-V PTP device supporting .getcrosststamp we need to export a reference to the current Hyper-V clocksource in use (MSR or TSC page). Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Drivers: hv: restore TSC page cleanup before kexecVitaly Kuznetsov2017-01-311-0/+4
| | | | | | | | | | We need to cleanup the TSC page before doing kexec/kdump or the new kernel may crash if it tries to use it. Fixes: 63ed4e0c67df ("Drivers: hv: vmbus: Consolidate all Hyper-V specific clocksource code") Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Drivers: hv: restore hypervcall page cleanup before kexecVitaly Kuznetsov2017-01-311-0/+16
| | | | | | | | | | | | We need to cleanup the hypercall page before doing kexec/kdump or the new kernel may crash if it tries to use it. Reuse the now-empty hv_cleanup function renaming it to hyperv_cleanup and moving to the arch specific code. Fixes: 8730046c1498 ("Drivers: hv vmbus: Move Hypercall page setup out of common code") Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Drivers: hv: vmbus: Move the check for hypercall page setupK. Y. Srinivasan2017-01-201-0/+15
| | | | | | | | As part of the effort to separate out architecture specific code, move the check for detecting if the hypercall page is setup. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Drivers: hv: vmbus: Move the crash notification functionK. Y. Srinivasan2017-01-201-0/+26
| | | | | | | | As part of the effort to separate out architecture specific code, move the crash notification function. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Drivers: hv: vmbus: Consolidate all Hyper-V specific clocksource codeK. Y. Srinivasan2017-01-201-0/+105
| | | | | | | | | As part of the effort to separate out architecture specific code, consolidate all Hyper-V specific clocksource code to an architecture specific code. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Drivers: hv: vmbus: Move Hypercall invocation code out of common codeK. Y. Srinivasan2017-01-191-5/+49
| | | | | | | | As part of the effort to separate out architecture specific code, move the hypercall invocation code to an architecture specific file. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Drivers: hv vmbus: Move Hypercall page setup out of common codeK. Y. Srinivasan2017-01-192-0/+63
As part of the effort to separate out architecture specific code, move the hypercall page setup to an architecture specific file. Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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