AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/mips/kvm
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James Hogan eadfb501a5 MIPS: KVM: Save k0 straight into VCPU structure 
Currently on a guest exception the guest's k0 register is saved to the
scratch temp register and the guest k1 saved to the exception base
address + 0x3000 using k0 to extract the Exception Base field of the
EBase register and as the base operand to the store. Both are then
copied into the VCPU structure after the other general purpose registers
have been saved there.

This bouncing to exception base + 0x3000 is not actually necessary as
the VCPU pointer can be determined and written through just as easily
with only a single spare register. The VCPU pointer is already needed in
k1 for saving the other GP registers, so lets save the guest k0 register
straight into the VCPU structure through k1, first saving k1 into the
scratch temp register instead of k0.

This could potentially pave the way for having a single exception base
area for use by all guests.

The ehb after saving the k register to the scratch temp register is also
delayed until just before it needs to be read back.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim KrÄmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-07-05 16:08:57 +02:00
..
00README.txt KVM/MIPS32: Release notes and KVM module Makefile 2013-05-08 03:55:35 +02:00
callback.c MIPS: KVM: Convert EXPORT_SYMBOL to _GPL 2016-01-24 03:13:24 +01:00
commpage.c MIPS: KVM: Move commpage so 0x0 is unmapped 2016-06-15 23:58:36 +02:00
commpage.h MIPS: KVM: Rename files to remove the prefix "kvm_" and "kvm_mips_" 2014-06-30 16:52:03 +02:00
dyntrans.c MIPS: KVM: Move commpage so 0x0 is unmapped 2016-06-15 23:58:36 +02:00
emulate.c MIPS: KVM: Add KScratch registers 2016-06-15 23:58:36 +02:00
entry.c MIPS: KVM: Save k0 straight into VCPU structure 2016-07-05 16:08:57 +02:00
fpu.S MIPS: KVM: Add base guest FPU support 2015-03-27 21:25:14 +00:00
interrupt.c MIPS: KVM: Convert code to kernel sized types 2016-06-14 11:02:41 +02:00
interrupt.h MIPS; KVM: Convert exception entry to uasm 2016-07-05 16:08:46 +02:00
Kconfig MIPS; KVM: Convert exception entry to uasm 2016-07-05 16:08:46 +02:00
Makefile MIPS; KVM: Convert exception entry to uasm 2016-07-05 16:08:46 +02:00
mips.c MIPS: KVM: Relative branch to common exit handler 2016-07-05 16:08:55 +02:00
mmu.c MIPS: KVM: Use host CCA for TLB mappings 2016-06-15 23:58:37 +02:00
msa.S MIPS: KVM: Add base guest MSA support 2015-03-27 21:25:19 +00:00
stats.c MIPS: KVM: Clean up kvm_exit trace event 2016-06-14 11:16:23 +02:00
tlb.c MIPS: KVM: Use host CCA for TLB mappings 2016-06-15 23:58:37 +02:00
trace.h MIPS: KVM: Combine entry trace events into class 2016-06-23 19:17:30 +02:00
trap_emul.c MIPS: KVM: Use mipsregs.h defs for config registers 2016-06-15 23:58:43 +02:00