Hi,
This is v2 of patches to add support for paravirtualized guest on mips
(mips_paravirt). Some of the patches add basic support to run it on
octeon3.
The core of mips_paravirt is David's work.
I've run it using lkvm on a host with KVM MIPS-VZ support (on
octeon3). I've tested guest kernels built for CPU_MIPS64_R2 and
CPU_MIPS32_R2.
When the guest kernel is built for CPU_CAVIUM_OCTEON it requires an
additional patch to avoid usage of octeon_send_ipi_single in
octeon_flush_icache_all_cores. Latest patch for this is not yet
included as it caused a regression and needs some rework.
To built a mips_paravirt guest kernel it's easiest to start with
mips_paravirt_defconfig, check/modify CPU selection (defconfig has
CPU_MIPS64_R2), and kick off kernel built.
Patches are against linux-next/master as of today (next-20140528).
(To make use of __BITFIELD_FIELD macro.)
Diffstat is
arch/mips/Kbuild.platforms | 1 +
arch/mips/Kconfig | 30 +-
arch/mips/cavium-octeon/Kconfig | 23 +-
arch/mips/configs/mips_paravirt_defconfig | 103 ++++++
arch/mips/include/asm/cpu-features.h | 9 +-
arch/mips/include/asm/cpu-type.h | 1 +
arch/mips/include/asm/kvm_para.h | 91 +++++
.../asm/mach-cavium-octeon/cpu-feature-overrides.h | 1 -
.../asm/mach-paravirt/cpu-feature-overrides.h | 36 ++
arch/mips/include/asm/mach-paravirt/irq.h | 19 +
.../include/asm/mach-paravirt/kernel-entry-init.h | 50 +++
arch/mips/include/asm/mach-paravirt/war.h | 25 ++
arch/mips/include/asm/mipsregs.h | 9 +
arch/mips/include/asm/r4kcache.h | 2 +
arch/mips/include/uapi/asm/kvm_para.h | 6 +-
arch/mips/kernel/Makefile | 2 +-
arch/mips/kernel/branch.c | 6 +-
arch/mips/kernel/cpu-probe.c | 2 +-
arch/mips/kernel/octeon_switch.S | 84 +++--
arch/mips/kernel/r4k_switch.S | 3 +
arch/mips/math-emu/cp1emu.c | 6 +-
arch/mips/mm/c-r4k.c | 48 ++-
arch/mips/mm/tlbex.c | 2 +-
arch/mips/paravirt/Kconfig | 6 +
arch/mips/paravirt/Makefile | 14 +
arch/mips/paravirt/Platform | 9 +
arch/mips/paravirt/paravirt-irq.c | 369 ++++++++++++++++++++
arch/mips/paravirt/paravirt-smp.c | 148 ++++++++
arch/mips/paravirt/serial.c | 40 +++
arch/mips/paravirt/setup.c | 67 ++++
arch/mips/pci/Makefile | 2 +-
arch/mips/pci/pci-virtio-guest.c | 131 +++++++
include/uapi/linux/kvm_para.h | 3 +
33 files changed, 1295 insertions(+), 53 deletions(-)
Changelog:
v2:
- Rebased patches on latest linux-next
- Define hypercalls and HC numbers for MIPS in kvm_para.h header files
- Misc changes to pci-virtio-guest.c:
* Make use of __BITFIELD_FIELD macro
* Calculate IO address for in[lwb] and out[lwb] depending on size
as usually done throughout the kernel.
* I still kept this driver version. Once that "Generic
Configuration Access Mechanism support"
(https://lkml.org/lkml/2014/5/18/54) is mainline I might have to
think about how to make use of that instead.
- Provide minimal defconfig
- Renaming mips_cpunum to get_ebase_cpunum
- Provide _machine_halt function with initial patch of paravirt code
* No _machine_restart so far. I have to look into this separately
from this initial patch set -- I think it requires additionl
kvm-tool changes.
- Fix barriers when booting secondary CPUs
- Replace check for 64-bit kernel by common macro
- Remove R4600_HIT_CACHEOP_WAR_IMPL from r4k_blast_dcache_page_dc128()
- Use switch statement in r4k_blast_dcache_page_setup()]
- Remove mistakenly introduced config options from patch
"MIPS: OCTEON: Move CAVIUM_OCTEON_CVMSEG_SIZE to CPU_CAVIUM_OCTEON"
- Use on_each_cpu unconditionally in irq_core_bus_sync_unlock
- Misc minor changes after review of v1
- Remove call to irq_reserve_irq from irq_init_core as linux-next
contains a patches to remove this function and friends
v1:
- http://marc.info/?i=1400597236-11352-1-git-send-email-andreas.herrmann@xxxxxxxxxxxxxxxxxx
Comments are welcome.
Thanks,
Andreas
PS: 1, or 2 comments from mailing list after 1st submission are still
not addressed. I'll look into this asap but I thought sending out v2
shouldn't be delayed.
