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KVM: PPC: Simplify kvmppc_load_up_(FPU|VMX|VSX) 

We don't need as complex code. I had some thinkos while writing it, figuring
I needed to support PPC32 paths on PPC64 which would have required DR=0, but
everything just runs fine with DR=1.

So let's make the functions simple C call wrappers that reserve some space on
the stack for the respective functions to clobber.

Fixes out-of-RMA-access (and thus guest FPU loading) on the PS3.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf 2010-02-19 11:00:47 +01:00 committed by Avi Kivity
parent 20a340abd3
commit 964b6411af
1 changed files with 2 additions and 11 deletions
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13
arch/powerpc/kvm/book3s_64_rmhandlers.S
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@ -164,24 +164,15 @@ _GLOBAL(kvmppc_rmcall)
#define define_load_up(what) \
\
_GLOBAL(kvmppc_load_up_ ## what); \
subi r1, r1, INT_FRAME_SIZE; \
stdu r1, -INT_FRAME_SIZE(r1); \
mflr r3; \
std r3, _LINK(r1); \
mfmsr r4; \
std r31, GPR3(r1); \
mr r31, r4; \
li r5, MSR_DR; \
oris r5, r5, MSR_EE@h; \
andc r4, r4, r5; \
mtmsr r4; \
\
bl .load_up_ ## what; \
\
mtmsr r31; \
ld r3, _LINK(r1); \
ld r31, GPR3(r1); \
addi r1, r1, INT_FRAME_SIZE; \
mtlr r3; \
addi r1, r1, INT_FRAME_SIZE; \
blr
define_load_up(fpu)