From 235959be9a7054151eaad692040d4a22bb6217fb Mon Sep 17 00:00:00 2001 From: Alexander Graf Date: Tue, 13 May 2014 16:44:09 +0200 Subject: [PATCH] PPC: ePAPR: Fix hypercall on LE guest 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 --- arch/powerpc/kernel/epapr_paravirt.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/kernel/epapr_paravirt.c b/arch/powerpc/kernel/epapr_paravirt.c index 7898be90f2dc..d9b79358b833 100644 --- a/arch/powerpc/kernel/epapr_paravirt.c +++ b/arch/powerpc/kernel/epapr_paravirt.c @@ -47,9 +47,10 @@ 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 } -- 2.20.1