Binbin Wu 2fd6e119ca hv: vmcall: hv should not change guest RAX vmcall is undefined ...

HV passes the return value of vmcall by register RAX unconditionally.
However, if the vmcall is undefined for a guest, RAX value of guest vcpu
should not be changed.

According to SDM Vol. 3C 30-9, VMCALL is allowed from any CPL in guest.
VMCALL is NOT allowed from  CPL > 0 in vmx root mode.
ACRN hypervisor doesn't call VMCALL in vmx root mode, though.

In current code, ACRN also deny VMCALL from CPL > 0 in guest.
So for this case, #GP will not be injected, instead, modify the RAX to
notify the return value.

Tracked-On: #2405
Signed-off-by: Binbin Wu <binbin.wu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

2019-02-18 11:56:42 +08:00

..

assign.c

HV: Modularize vtd.c to remove acrn_vm usage

2019-02-06 08:53:46 +08:00

ept.c

HV: Remove snoopy_mem from iommu

2019-02-14 10:16:21 +08:00

guest_memory.c

hv: refine guest.c

2019-02-01 16:30:55 +08:00

instr_emul.c

HV: modularization cleanup instr_emul header file

2019-01-22 10:50:30 +08:00

io_emul.c

hv:move some files to guest folder

2019-01-30 20:43:04 +08:00

pm.c

HV: rename the term of vm0 to sos vm

2019-01-21 18:03:31 +08:00

trusty.c

hv:move some files to guest folder

2019-01-30 20:43:04 +08:00

ucode.c

hv: refine coding style for ucode.c

2018-12-19 09:44:42 +08:00

vcpu.c

hv:cleanup header file for vcpu.c & vcpu.h

2019-02-03 13:50:42 +08:00

vcpuid.c

hv: extend lapic pass-through for DM launched VM

2019-01-28 19:47:33 +08:00

virq.c

hv: vlapic: make vlapic deliver interrupt related functions more readable

2019-02-02 09:31:49 +08:00

virtual_cr.c

HV: Modularize vtd.c to remove acrn_vm usage

2019-02-06 08:53:46 +08:00

vlapic_priv.h

hv: self-IPI APIC register in x2APIC mode of guest vLAPIC

2018-11-02 13:48:43 +08:00

vlapic.c

hv: vlapic: make vlapic deliver interrupt related functions more readable

2019-02-02 09:31:49 +08:00

vm.c

HV: Remove snoopy_mem from iommu

2019-02-14 10:16:21 +08:00

vmcall.c

hv: vmcall: hv should not change guest RAX vmcall is undefined

2019-02-18 11:56:42 +08:00

vmcs.c

HV: fix address type violation for MSR_LOAD/STORE

2019-01-31 22:23:41 +08:00

vmexit.c

HV: Modularize vtd.c to remove acrn_vm usage

2019-02-06 08:53:46 +08:00

vmsr.c

hv: extend lapic pass-through for DM launched VM

2019-01-28 19:47:33 +08:00

vmtrr.c

HV: rename the term of vm0 to sos vm

2019-01-21 18:03:31 +08:00

vmx_asm.S

hv: refine guest.h

2019-02-03 13:00:42 +08:00