diff options
| -rw-r--r-- | arch/powerpc/include/asm/xics.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xics/icp-native.c | 21 |
2 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/xics.h b/arch/powerpc/include/asm/xics.h index 0e25bdb190bb..254604856e69 100644 --- a/arch/powerpc/include/asm/xics.h +++ b/arch/powerpc/include/asm/xics.h @@ -30,6 +30,7 @@ #ifdef CONFIG_PPC_ICP_NATIVE extern int icp_native_init(void); extern void icp_native_flush_interrupt(void); +extern void icp_native_cause_ipi_rm(int cpu); #else static inline int icp_native_init(void) { return -ENODEV; } #endif diff --git a/arch/powerpc/sysdev/xics/icp-native.c b/arch/powerpc/sysdev/xics/icp-native.c index eae32654bdf2..afdf62f2a695 100644 --- a/arch/powerpc/sysdev/xics/icp-native.c +++ b/arch/powerpc/sysdev/xics/icp-native.c @@ -159,6 +159,27 @@ static void icp_native_cause_ipi(int cpu, unsigned long data) icp_native_set_qirr(cpu, IPI_PRIORITY); } +#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE +void icp_native_cause_ipi_rm(int cpu) +{ + /* + * Currently not used to send IPIs to another CPU + * on the same core. Only caller is KVM real mode. + * Need the physical address of the XICS to be + * previously saved in kvm_hstate in the paca. + */ + unsigned long xics_phys; + + /* + * Just like the cause_ipi functions, it is required to + * include a full barrier (out8 includes a sync) before + * causing the IPI. + */ + xics_phys = paca[cpu].kvm_hstate.xics_phys; + out_rm8((u8 *)(xics_phys + XICS_MFRR), IPI_PRIORITY); +} +#endif + /* * Called when an interrupt is received on an off-line CPU to * clear the interrupt, so that the CPU can go back to nap mode. |