This set of patches adds support for taking exceptions with the MMU on which is
supported by POWER8.
A new set of exception vectors is added at 0xc000_0000_0000_4xxx. When the HW
takes us here, MSR IR/DR will be set already and we no longer need a costly
RFID to turn the MMU back on again.
The original 0x0 based exception vectors remain for when the HW can't leave the
MMU on. Examples of this are when we can't trust the current the MMU mappings,
like when we are changing from guest to hypervisor (HV 0 -> 1) or when the MMU
was off already. In these cases the HW will take us to the original 0x0 based
exception vectors with the MMU off as before.
The core of these patches were originally written by Matt Evans.
Ian Munsie (5):
powerpc: Add set_mode hcall
powerpc: Add wrappers to enable/disable relocation on exceptions
powerpc: Move get_longbusy_msecs into hvcall.h and remove duplicate
function
powerpc: Enable relocation on during exceptions at boot
powerpc: Disable relocation on exceptions when kexecing
Michael Neuling (9):
powerpc: Add POWER8 architected mode to cputable
powerpc: Whitespace changes in exception64s.S
powerpc: Remove unessessary 0x3000 location enforcement
powerpc: Make load_hander handle upto 64k offset
powerpc: Turn syscall handler into macros
powerpc: Add new macros needed for relocation on exceptions
powerpc: Add relocation on exception vector handlers
powerpc: Move initial mfspr LPCR out of __init_LPCR
powerpc: Setup relocation on exceptions for bare metal systems
arch/powerpc/include/asm/exception-64s.h | 97 ++++++-
arch/powerpc/include/asm/firmware.h | 4 +-
arch/powerpc/include/asm/hvcall.h | 23 +-
arch/powerpc/include/asm/reg.h | 2 +
arch/powerpc/kernel/cpu_setup_power.S | 8 +-
arch/powerpc/kernel/cputable.c | 15 ++
arch/powerpc/kernel/exceptions-64s.S | 306 +++++++++++++++++++----
arch/powerpc/kernel/head_64.S | 3 +-
arch/powerpc/kernel/setup_64.c | 5 +
arch/powerpc/platforms/pseries/firmware.c | 1 +
arch/powerpc/platforms/pseries/plpar_wrappers.h | 36 +++
arch/powerpc/platforms/pseries/setup.c | 71 ++++++
drivers/infiniband/hw/ehca/hcp_if.c | 20 --
drivers/net/ethernet/ibm/ehea/ehea_phyp.h | 20 --
14 files changed, 516 insertions(+), 95 deletions(-)
--
1.7.9.5
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/linuxppc-dev
