From: David Gibson <[email protected]> The H_CEDE hypercall implementation for the pseries machine doesn't trigger quite the right path in the main cpu exec loop. We should set exit_request to pop up one extra level and recheck state, and we should set the exception_index to EXCP_HLT (H_CEDE is roughly equivalent to the hlt instruction on x86).
In practice, this doesn't really matter except for KVM, and KVM implements H_CEDE internally so we never hit this code path. But we might as well get it right, just in case it matters some day. Signed-off-by: David Gibson <[email protected]> Signed-off-by: Alexander Graf <[email protected]> --- hw/spapr_hcall.c | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/hw/spapr_hcall.c b/hw/spapr_hcall.c index abd847f..2df94d1 100644 --- a/hw/spapr_hcall.c +++ b/hw/spapr_hcall.c @@ -544,6 +544,8 @@ static target_ulong h_cede(CPUPPCState *env, sPAPREnvironment *spapr, hreg_compute_hflags(env); if (!cpu_has_work(env)) { env->halted = 1; + env->exception_index = EXCP_HLT; + env->exit_request = 1; } return H_SUCCESS; } -- 1.6.0.2
