On 05/06/2013 11:10 AM, Tiejun Chen wrote:
For the external interrupt, the decrementer exception and the doorbell excpetion, we also need to soft-disable interrupts while doing as host interrupt handlers since the DO_KVM hook is always performed to skip EXCEPTION_COMMON then miss this original chance with the 'ints' (INTS_DISABLE).
Sorry, miss to send Ben. Tiejun
Signed-off-by: Tiejun Chen <tiejun.chen@xxxxxxxxxxxxx> --- arch/powerpc/kvm/bookehv_interrupts.S | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S index e8ed7d6..2fd62bf 100644 --- a/arch/powerpc/kvm/bookehv_interrupts.S +++ b/arch/powerpc/kvm/bookehv_interrupts.S @@ -33,6 +33,8 @@ #ifdef CONFIG_64BIT #include <asm/exception-64e.h> +#include <asm/hw_irq.h> +#include <asm/irqflags.h> #else #include "../kernel/head_booke.h" /* for THREAD_NORMSAVE() */ #endif @@ -469,6 +471,13 @@ _GLOBAL(kvmppc_resume_host) PPC_LL r3, HOST_RUN(r1) mr r5, r14 /* intno */ mr r14, r4 /* Save vcpu pointer. */ +#ifdef CONFIG_64BIT + /* Should we soft-disable interrupts? */ + andi. r6, r5, BOOKE_INTERRUPT_EXTERNAL | BOOKE_INTERRUPT_DECREMENTER | BOOKE_INTERRUPT_DOORBELL + beq skip_soft_dis + SOFT_DISABLE_INTS(r7,r8) +skip_soft_dis: +#endif bl kvmppc_handle_exit /* Restore vcpu pointer and the nonvolatiles we used. */
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