GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-23 23:32:14 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions
Star64_linux/arch/powerpc/sysdev
History
Greg Kurz a3bf9fbdad powerpc/pseries: Fix xive=off command line 
On POWER9, if the hypervisor supports XIVE exploitation mode, the
guest OS will unconditionally requests for the XIVE interrupt mode
even if XIVE was deactivated with the kernel command line xive=off.
Later on, when the spapr XIVE init code handles xive=off, it disables
XIVE and tries to fall back on the legacy mode XICS.

This discrepency causes a kernel panic because the hypervisor is
configured to provide the XIVE interrupt mode to the guest :

  kernel BUG at arch/powerpc/sysdev/xics/xics-common.c:135!
  ...
  NIP xics_smp_probe+0x38/0x98
  LR  xics_smp_probe+0x2c/0x98
  Call Trace:
    xics_smp_probe+0x2c/0x98 (unreliable)
    pSeries_smp_probe+0x40/0xa0
    smp_prepare_cpus+0x62c/0x6ec
    kernel_init_freeable+0x148/0x448
    kernel_init+0x2c/0x148
    ret_from_kernel_thread+0x5c/0x68

Look for xive=off during prom_init and don't ask for XIVE in this
case. One exception though: if the host only supports XIVE, we still
want to boot so we ignore xive=off.

Similarly, have the spapr XIVE init code to looking at the interrupt
mode negotiated during CAS, and ignore xive=off if the hypervisor only
supports XIVE.

Fixes: eac1e731b5 ("powerpc/xive: guest exploitation of the XIVE interrupt controller")
Cc: stable@vger.kernel.org # v4.20
Reported-by: Pavithra R. Prakash <pavrampu@in.ibm.com>
Signed-off-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-06-02 19:39:36 +10:00
..
ge treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
xics powerpc: Add -Werror at arch/powerpc level 2018-10-19 00:56:17 +11:00
xive powerpc/pseries: Fix xive=off command line 2019-06-02 19:39:36 +10:00
6xx-suspend.S powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU 2019-02-23 22:31:40 +11:00
cpm1.c powerpc: remove unnecessary inclusion of asm/tlbflush.h 2018-07-30 22:48:20 +10:00
cpm2.c powerpc/sysdev: change CPM GPIO to platform_device 2018-01-20 23:29:02 -06:00
cpm2_pic.c
cpm2_pic.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
cpm_common.c powerpc/cpm1: fix compilation error with CONFIG_PPC_EARLY_DEBUG_CPM 2018-08-10 22:12:33 +10:00
cpm_gpio.c powerpc: cpm_gpio: Remove owner assignment from platform_driver 2018-06-03 20:43:35 +10:00
dart.h
dart_iommu.c memblock: memblock_phys_alloc(): don't panic 2019-03-12 10:04:01 -07:00
dcr-low.S
dcr.c
ehv_pic.c
fsl_85xx_cache_ctlr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
fsl_85xx_cache_sram.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
fsl_85xx_l2ctlr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
fsl_gtm.c
fsl_lbc.c
fsl_mpic_err.c powerpc/mpic: Pass first free vector number to mpic_setup_error_int() 2018-07-19 21:58:09 +10:00
fsl_mpic_timer_wakeup.c powerpc/mpic_timer: avoid struct timeval 2018-01-21 15:06:16 +11:00
fsl_msi.c kernel/irq: Extend lockdep class for request mutex 2017-12-28 12:26:35 +01:00
fsl_msi.h
fsl_pci.c powerpc/dma: trim the fat from <asm/dma-mapping.h> 2019-02-18 22:41:04 +11:00
fsl_pci.h
fsl_pmc.c
fsl_rcpm.c
fsl_rio.c
fsl_rio.h powerpc/fsl-rio: fix spelling mistake "reserverd" -> "reserved" 2018-12-21 20:45:15 -06:00
fsl_rmu.c cross-tree: phase out dma_zalloc_coherent() 2019-01-08 07:58:37 -05:00
fsl_soc.c
fsl_soc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
grackle.c
i8259.c powerpc: Set I/O port resource types correctly 2017-12-18 23:07:45 -06:00
indirect_pci.c
ipic.c powerpc/ipic: drop unused functions 2019-01-14 20:39:27 +11:00
ipic.h
Kconfig powerpc: remove redundant 'default n' from Kconfig-s 2018-10-13 22:21:25 +11:00
Makefile powerpc: change CONFIG_6xx to CONFIG_PPC_BOOK3S_32 2018-11-26 22:33:37 +11:00
micropatch.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mmio_nvram.c
mpc5xxx_clocks.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpic.c powerpc/mpic: Pass first free vector number to mpic_setup_error_int() 2018-07-19 21:58:09 +10:00
mpic.h
mpic_msgr.c powerpc: Fix size calculation using resource_size() 2018-08-10 22:12:33 +10:00
mpic_msi.c
mpic_timer.c powerpc/mpic_timer: avoid struct timeval 2018-01-21 15:06:16 +11:00
mpic_u3msi.c
msi_bitmap.c treewide: add checks for the return value of memblock_alloc*() 2019-03-12 10:04:02 -07:00
of_rtc.c
pmi.c
rtc_cmos_setup.c
scom.c powerpc/scom: Return NULL instead of 0 2018-11-25 17:11:21 +11:00
simple_gpio.c
simple_gpio.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
tsi108_dev.c powerpc: tsi108: fix similar warning reported by kbuild test robot 2019-05-10 15:14:29 -07:00
tsi108_pci.c
udbg_memcons.c
xilinx_intc.c
xilinx_pci.c