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PPC: ePAPR: Fix hypercall on LE guest

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We get an array of instructions from the hypervisor via device tree that
we write into a buffer that gets executed whenever we want to make an
ePAPR compliant hypercall.

However, the hypervisor passes us these instructions in BE order which
we have to manually convert to LE when we want to run them in LE mode.

With this fixup in place, I can successfully run LE kernels with KVM
PV enabled on PR KVM.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Alexander Graf 2014-05-15 14:35:19 +02:00 committed by Scott Wood
parent 1be62c6cce
commit 8cb59788b3
1 changed files with 3 additions and 2 deletions
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5
arch/powerpc/kernel/epapr_paravirt.c
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@ -48,9 +48,10 @@ static int __init early_init_dt_scan_epapr(unsigned long node,
return -1;
for (i = 0; i < (len / 4); i++) {
patch_instruction(epapr_hypercall_start + i, insts[i]);
u32 inst = be32_to_cpu(insts[i]);
patch_instruction(epapr_hypercall_start + i, inst);
#if !defined(CONFIG_64BIT) || defined(CONFIG_PPC_BOOK3E_64)
patch_instruction(epapr_ev_idle_start + i, insts[i]);
patch_instruction(epapr_ev_idle_start + i, inst);
#endif
}