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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2016-06-27 08:55:17 +0200 |
|---|---|---|
| committer | David Gibson <david@gibson.dropbear.id.au> | 2016-07-01 09:57:01 +1000 |
| commit | d1dbe37c1ee3f14cb64a9ae3c89f637fdd08fca1 (patch) | |
| tree | 53e59fac7795452ff559ee6dc4efb6c23ea63433 | |
| parent | 4b3fc37788fe5a9c6ec0c43863c78604db40cbb3 (diff) | |
| download | focaccia-qemu-d1dbe37c1ee3f14cb64a9ae3c89f637fdd08fca1.tar.gz focaccia-qemu-d1dbe37c1ee3f14cb64a9ae3c89f637fdd08fca1.zip | |
ppc: Fix conditions for delivering external interrupts to a guest
External interrupts can bypass the MSR_EE test if they occur in guest mode and LPES0 is clear. In that case they are directed to the hypervisor Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Cédric Le Goater <clg@kaod.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
| -rw-r--r-- | target-ppc/excp_helper.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/target-ppc/excp_helper.c b/target-ppc/excp_helper.c index 533866b87b..26adda49b2 100644 --- a/target-ppc/excp_helper.c +++ b/target-ppc/excp_helper.c @@ -794,6 +794,14 @@ static void ppc_hw_interrupt(CPUPPCState *env) return; } } + /* Extermal interrupt can ignore MSR:EE under some circumstances */ + if (env->pending_interrupts & (1 << PPC_INTERRUPT_EXT)) { + bool lpes0 = !!(env->spr[SPR_LPCR] & LPCR_LPES0); + if (msr_ee != 0 || (env->has_hv_mode && msr_hv == 0 && !lpes0)) { + powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_EXTERNAL); + return; + } + } if (msr_ce != 0) { /* External critical interrupt */ if (env->pending_interrupts & (1 << PPC_INTERRUPT_CEXT)) { @@ -839,17 +847,6 @@ static void ppc_hw_interrupt(CPUPPCState *env) powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_DECR); return; } - /* External interrupt */ - if (env->pending_interrupts & (1 << PPC_INTERRUPT_EXT)) { - /* Taking an external interrupt does not clear the external - * interrupt status - */ -#if 0 - env->pending_interrupts &= ~(1 << PPC_INTERRUPT_EXT); -#endif - powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_EXTERNAL); - return; - } if (env->pending_interrupts & (1 << PPC_INTERRUPT_DOORBELL)) { env->pending_interrupts &= ~(1 << PPC_INTERRUPT_DOORBELL); powerpc_excp(cpu, env->excp_model, POWERPC_EXCP_DOORI); |