GitLab

lcd_destroy => lcd_vmx_destroy. Pretty much a straight
copy over, but removed some unneeded code.

Conditional compilation on number of autoload msr's.

Untested.

vmx_setup_vmcs ==> vmx_setup_vmcs_guest_settings and
vmx_setup_vmcs_host.

vmx_setup_vmcs_guest_settings
-- execution control (e.g., interrupt handling)
-- ept pointer
-- %cr0 and %cr4 access control

vmx_setup_vmcs_guest_regs
-- initial %cr0, %cr4
-- segmentation--bases, limits, selectors
-- guest EFER (long mode enabled, no syscall/sysret)
-- initial activity and interrupt state

vmx_setup_vmcs_host
-- control and segmentation regs
-- host EFER
-- no saving of syscall/sysret msrs since these are
   disabled in guest
-- no page attribute table

lcd_create --> lcd_vmx_create, with a lot of code
re-factored or removed for now, to keep it simple
(no gdt, idt, isr, paging bitmap, address space
init, etc.).
-- basic ept initialization
-- vmcs loading on a cpu
   -- re-factored __vmx_setup_cpu to use built-in
      segment descriptor access functions in desc.h
   -- removed host sys_enter storage, since this
      msr is disabled right now anyway
   -- more doc to understand vmcs load process

Added straight copy from old code of lcd_vmx_exit.

Shifted lcd_vmx_init and lcd_vmx_exit to
arch/x86/include/asm/lcd-vmx.h. Ideally, if we want
this to be arch-independent, probably want to change
header to asm/lcd.h, and routines to lcd_arch_init
and lcd_arch_exit, or something similar.

Two components to the lcd build now:
-- arch/x86/lcd/Makefile: for building x86 lcd code
-- virt/lcd/Makefile: for building arch-indep lcd code

Modified the build system just slightly for a cleaner
build:
-- virt/ directory treated like ipc/, usr/, etc. directories
-- added Kconfig and Makefile to virt/, mirroring drivers/
-- updated top-level Makefile to include virt/ as vmlinux
   directory / dependency, so build system will recur into
   virt/
-- updated arch/x86/Kconfig to include virt/Kconfig, so it
   will be included as a menu item
-- updated arch/x86/Kbuild to include arch/x86/lcd/

Removed old capabilities code in cap/.

Removed lcd syscall.

Temporarily turned off build for drivers/lcd.

Fixed most bugs in lcd-vmx (still need to do lcd_vmx_exit).
-- minor naming issues in lcd-vmx.h
-- straight copy over of vmx_disable_intercepts_for_msr,
   but with more doc
-- removed VMX_EPT_INDIVIDUAL_ADDR macro from vmx.h (where
   did this come from? it's not documented in the intel manual,
   nor is it used in kvm)

Added a few missing macros to arch/x86/include/vmx.h,
and RESERVED masks for easily determining which bits
in a vmx control are reserved (needed in adjust_vmx_controls).

Re-factored setup_vmcs_config and adjust_vmx_controls.
setup_vmcs_config does pretty much the same thing, but it
fails immediately if a control isn't available --
adjust_vmx_controls confirms that the exact desired
controls are available, and sets the reserved bits to
1 or 0 as needed. Cleaner comments and organization.
Re-factored the vmx basic settings to
vmcs_config_basic_settings.

Removed some of the vmx feature check code that was in
the original lcd_vmx_init, as setup_vmcs_config now does
that.

Essentially a straight copy over of:

-- __vmx_enable
-- vmx_enable
-- vmx_disable
-- vmx_free_vmxon_areas
-- __vmxon
-- __vmxoff

The only difference is I shifted tbl and cache
invalidation to vmx_enable (originally in __vmx_enable)
and added some comments.

Straight copy over of
-- vmx_alloc_vmcs
-- vmx_free_vmcs
-- invvpid, invept code, with slight renaming

Arch-dependent code will go in arch/x86/lcd, and the
header(s) will reside in arch/x86/include/asm.

For now, I have only moved some of the arch-dependent
junk that was in include/lcd/lcd.h into
arch/x86/include/asm/lcd-vmx.h.