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KVM: arm64: fix misleading comments in save/restore

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The elr_el2 and spsr_el2 registers in fact contain the processor state
before entry into EL2. In the case of guest state it could be in either
el0 or el1.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Alex Bennée 2015-06-04 14:28:37 +01:00 committed by Marc Zyngier
parent 8889583c03
commit 921ef1e16c
1 changed files with 4 additions and 4 deletions
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8
arch/arm64/kvm/hyp.S
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@ -50,8 +50,8 @@
stp x29, lr, [x3, #80]
mrs x19, sp_el0
mrs x20, elr_el2 // EL1 PC
mrs x21, spsr_el2 // EL1 pstate
mrs x20, elr_el2 // pc before entering el2
mrs x21, spsr_el2 // pstate before entering el2
stp x19, x20, [x3, #96]
str x21, [x3, #112]
@ -82,8 +82,8 @@
ldr x21, [x3, #16]
msr sp_el0, x19
msr elr_el2, x20 // EL1 PC
msr spsr_el2, x21 // EL1 pstate
msr elr_el2, x20 // pc on return from el2
msr spsr_el2, x21 // pstate on return from el2
add x3, x2, #CPU_XREG_OFFSET(19)
ldp x19, x20, [x3]