linux.git/arch/x86/kernel/cpu/vmware.c, branch v5.10

x86/vmware: Add VMware-specific handling for VMMCALL under SEV-ES

2020-09-09T09:33:20+00:00

Add VMware-specific handling for #VC faults caused by VMMCALL
instructions.

Signed-off-by: Doug Covelli 
Signed-off-by: Tom Lendacky 
[ jroedel@suse.de: - Adapt to different paravirt interface ]
Co-developed-by: Joerg Roedel 
Signed-off-by: Joerg Roedel 
Signed-off-by: Borislav Petkov 
Link: https://lkml.kernel.org/r/20200907131613.12703-65-joro@8bytes.org

x86/vmware: Use bool type for vmw_sched_clock

2020-03-24T09:29:22+00:00

To be aligned with other bool variables.

Signed-off-by: Alexey Makhalov 
Signed-off-by: Borislav Petkov 
Reviewed-by: Thomas Gleixner 
Link: https://lkml.kernel.org/r/20200323195707.31242-6-amakhalov@vmware.com

x86/vmware: Enable steal time accounting

2020-03-24T09:06:27+00:00

Set paravirt_steal_rq_enabled if steal clock present.
paravirt_steal_rq_enabled is used in sched/core.c to adjust task
progress by offsetting stolen time. Use 'no-steal-acc' off switch (share
same name with KVM) to disable steal time accounting.

Signed-off-by: Alexey Makhalov 
Signed-off-by: Borislav Petkov 
Reviewed-by: Thomas Hellstrom 
Reviewed-by: Thomas Gleixner 
Link: https://lkml.kernel.org/r/20200323195707.31242-5-amakhalov@vmware.com

x86/vmware: Add steal time clock support for VMware guests

2020-03-24T09:04:51+00:00

Steal time is the amount of CPU time needed by a guest virtual machine
that is not provided by the host. Steal time occurs when the host
allocates this CPU time elsewhere, for example, to another guest.

Steal time can be enabled by adding the VM configuration option
stealclock.enable = "TRUE". It is supported by VMs that run hardware
version 13 or newer.

Introduce the VMware steal time infrastructure. The high level code
(such as enabling, disabling and hot-plug routines) was derived from KVM.

 [ Tomer: use READ_ONCE macros and 32bit guests support. ]
 [ bp: Massage. ]

Co-developed-by: Tomer Zeltzer 
Signed-off-by: Alexey Makhalov 
Signed-off-by: Tomer Zeltzer 
Signed-off-by: Borislav Petkov 
Reviewed-by: Thomas Hellstrom 
Reviewed-by: Thomas Gleixner 
Link: https://lkml.kernel.org/r/20200323195707.31242-4-amakhalov@vmware.com

x86/vmware: Remove vmware_sched_clock_setup()

2020-03-24T08:31:06+00:00

Move cyc2ns setup logic to separate function.
This separation will allow to use cyc2ns mult/shift pair
not only for the sched_clock but also for other clocks
such as steal_clock.

Signed-off-by: Alexey Makhalov 
Signed-off-by: Borislav Petkov 
Reviewed-by: Thomas Hellstrom 
Reviewed-by: Thomas Gleixner 
Link: https://lkml.kernel.org/r/20200323195707.31242-3-amakhalov@vmware.com

x86/vmware: Make vmware_select_hypercall() __init

2020-03-24T08:26:04+00:00

vmware_select_hypercall() is used only by the __init
functions, and should be annotated with __init as well.

Signed-off-by: Alexey Makhalov 
Signed-off-by: Borislav Petkov 
Reviewed-by: Thomas Hellstrom 
Reviewed-by: Thomas Gleixner 
Link: https://lkml.kernel.org/r/20200323195707.31242-2-amakhalov@vmware.com

x86/cpu/vmware: Use the full form of INL in VMWARE_PORT

2019-10-08T11:26:42+00:00

LLVM's assembler doesn't accept the short form INL instruction:

  inl (%%dx)

but instead insists on the output register to be explicitly specified:

  :1:7: error: invalid operand for instruction
          inl (%dx)
             ^
  LLVM ERROR: Error parsing inline asm

Use the full form of the instruction to fix the build.

Signed-off-by: Sami Tolvanen 
Signed-off-by: Borislav Petkov 
Reviewed-by: Nick Desaulniers 
Reviewed-by: Kees Cook 
Acked-by: Thomas Hellstrom 
Cc: clang-built-linux@googlegroups.com
Cc: "H. Peter Anvin" 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: virtualization@lists.linux-foundation.org
Cc: "VMware, Inc." 
Cc: x86-ml 
Link: https://github.com/ClangBuiltLinux/linux/issues/734
Link: https://lkml.kernel.org/r/20191007192129.104336-1-samitolvanen@google.com
Signed-off-by: Ingo Molnar

x86/vmware: Add a header file for hypercall definitions

2019-08-28T11:32:06+00:00

The new header is intended to be used by drivers using the backdoor.
Follow the KVM example using alternatives self-patching to choose
between vmcall, vmmcall and io instructions.

Also define two new CPU feature flags to indicate hypervisor support
for vmcall- and vmmcall instructions. The new XF86_FEATURE_VMW_VMMCALL
flag is needed because using XF86_FEATURE_VMMCALL might break QEMU/KVM
setups using the vmmouse driver. They rely on XF86_FEATURE_VMMCALL
on AMD to get the kvm_hypercall() right. But they do not yet implement
vmmcall for the VMware hypercall used by the vmmouse driver.

 [ bp: reflow hypercall %edx usage explanation comment. ]

Signed-off-by: Thomas Hellstrom 
Signed-off-by: Borislav Petkov 
Reviewed-by: Doug Covelli 
Cc: Aaron Lewis 
Cc: "David S. Miller" 
Cc: Fenghua Yu 
Cc: Greg Kroah-Hartman 
Cc: "H. Peter Anvin" 
Cc: Ingo Molnar 
Cc: Josh Poimboeuf 
Cc: linux-graphics-maintainer@vmware.com
Cc: Mauro Carvalho Chehab 
Cc: Nicolas Ferre 
Cc: Robert Hoo 
Cc: Thomas Gleixner 
Cc: virtualization@lists.linux-foundation.org
Cc: 
Cc: x86-ml 
Link: https://lkml.kernel.org/r/20190828080353.12658-3-thomas_os@shipmail.org

x86/vmware: Update platform detection code for VMCALL/VMMCALL hypercalls

2019-08-28T08:48:30+00:00

Vmware has historically used an INL instruction for this, but recent
hardware versions support using VMCALL/VMMCALL instead, so use this
method if supported at platform detection time. Explicitly code separate
macro versions since the alternatives self-patching has not been
performed at platform detection time.

Also put tighter constraints on the assembly input parameters.

Co-developed-by: Doug Covelli 
Signed-off-by: Doug Covelli 
Signed-off-by: Thomas Hellstrom 
Signed-off-by: Borislav Petkov 
Reviewed-by: Doug Covelli 
Cc: "H. Peter Anvin" 
Cc: Ingo Molnar 
Cc: linux-graphics-maintainer@vmware.com
Cc: Thomas Gleixner 
Cc: virtualization@lists.linux-foundation.org
Cc: 
Cc: x86-ml 
Link: https://lkml.kernel.org/r/20190828080353.12658-2-thomas_os@shipmail.org

x86/apic: Rename 'lapic_timer_frequency' to 'lapic_timer_period'

2019-05-09T09:06:49+00:00

This variable is a period unit (number of clock cycles per jiffy),
not a frequency (which is number of cycles per second).

Give it a more appropriate name.

Suggested-by: Ingo Molnar 
Signed-off-by: Daniel Drake 
Reviewed-by: Thomas Gleixner 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: len.brown@intel.com
Cc: linux@endlessm.com
Cc: rafael.j.wysocki@intel.com
Link: http://lkml.kernel.org/r/20190509055417.13152-2-drake@endlessm.com
Signed-off-by: Ingo Molnar