On Mon, 30 Mar 2020 13:29:54 +0530, Balamuruhan S wrote: > Data Cache Block Invalidate (dcbi) instruction implemented back in > PowerPC architecture version 2.03. But as per Power Processor Users Manual > it is obsolete and not supported by POWER8/POWER9 core. Attempt to use of > this illegal instruction results in a hypervisor emulation assistance > interrupt. So, ifdef it out the option `i` in xmon for 64bit Book3S. > > 0:mon> fi > cpu 0x0: Vector: 700 (Program Check) at [c000000003be74a0] > pc: c000000000102030: cacheflush+0x180/0x1a0 > lr: c000000000101f3c: cacheflush+0x8c/0x1a0 > sp: c000000003be7730 > msr: 8000000000081033 > current = 0xc0000000035e5c00 > paca = 0xc000000001910000 irqmask: 0x03 irq_happened: 0x01 > pid = 1025, comm = bash > Linux version 5.6.0-rc5-g5aa19adac (root@ltc-wspoon6) (gcc version 7.4.0 > (Ubuntu 7.4.0-1ubuntu1~18.04.1)) #1 SMP Tue Mar 10 04:38:41 CDT 2020 > cpu 0x0: Exception 700 (Program Check) in xmon, returning to main loop > [c000000003be7c50] c00000000084abb0 __handle_sysrq+0xf0/0x2a0 > [c000000003be7d00] c00000000084b3c0 write_sysrq_trigger+0xb0/0xe0 > [c000000003be7d30] c0000000004d1edc proc_reg_write+0x8c/0x130 > [c000000003be7d60] c00000000040dc7c __vfs_write+0x3c/0x70 > [c000000003be7d80] c000000000410e70 vfs_write+0xd0/0x210 > [c000000003be7dd0] c00000000041126c ksys_write+0xdc/0x130 > [c000000003be7e20] c00000000000b9d0 system_call+0x5c/0x68 > --- Exception: c01 (System Call) at 00007fffa345e420 > SP (7ffff0b08ab0) is in userspace
Applied to powerpc/next. [1/1] powerpc/xmon: Use `dcbf` inplace of `dcbi` instruction for 64bit Book3S https://git.kernel.org/powerpc/c/81a413259a224f0d1783c41a74f18864d4f3d67e cheers