From: Paul Mackerras <paulus@ozlabs.org>
To: linuxppc-dev@ozlabs.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org
Subject: [PATCH 03/18] powerpc/64: Always enable radix support for 64-bit Book 3S kernels
Date: Thu, 12 Jan 2017 20:07:11 +1100 [thread overview]
Message-ID: <1484212046-29591-4-git-send-email-paulus@ozlabs.org> (raw)
In-Reply-To: <1484212046-29591-1-git-send-email-paulus@ozlabs.org>
This removes the ability for the user to choose whether or not to
include support for the radix MMU in kernels built to run on 64-bit
Book 3S machines. Excluding radix support saves only about 25kiB
of text and 13kiB of data, a total of little over half a page.
Having the option expands the space of option combinations that
need to be tested, which is an ongoing burden on developers.
Given that the space savings are small, let's remove the option.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
---
arch/powerpc/platforms/Kconfig.cputype | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 6e89e5a..de88156 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -334,13 +334,8 @@ config PPC_STD_MMU_64
depends on PPC_STD_MMU && PPC64
config PPC_RADIX_MMU
- bool "Radix MMU Support"
+ def_bool y
depends on PPC_BOOK3S_64
- default y
- help
- Enable support for the Power ISA 3.0 Radix style MMU. Currently this
- is only implemented by IBM Power9 CPUs, if you don't have one of them
- you can probably disable this.
config PPC_MMU_NOHASH
def_bool y
--
2.7.4
next prev parent reply other threads:[~2017-01-12 9:07 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-12 9:07 [PATCH 00/18] Support for radix guest and host on POWER9 Paul Mackerras
2017-01-12 9:07 ` [PATCH 01/18] powerpc/64: Don't try to use radix MMU under a hypervisor Paul Mackerras
2017-01-12 16:48 ` Balbir Singh
2017-01-12 9:07 ` [PATCH 02/18] powerpc/64: Fixes for the ibm, client-architecture-support options Paul Mackerras
2017-01-12 9:07 ` Paul Mackerras [this message]
2017-01-12 9:07 ` [PATCH 04/18] powerpc/64: Enable use of radix MMU under hypervisor on POWER9 Paul Mackerras
2017-01-22 2:17 ` kbuild test robot
2017-01-12 9:07 ` [PATCH 05/18] powerpc/64: More definitions for POWER9 Paul Mackerras
2017-01-12 9:07 ` [PATCH 06/18] powerpc/64: Export pgtable_cache and pgtable_cache_add for KVM Paul Mackerras
2017-01-12 9:07 ` [PATCH 07/18] powerpc/64: Make type of partition table flush depend on partition type Paul Mackerras
2017-01-12 9:07 ` [PATCH 08/18] KVM: PPC: Book3S HV: Don't try to signal cpu -1 Paul Mackerras
2017-01-12 9:07 ` [PATCH 09/18] KVM: PPC: Book3S HV: Add userspace interfaces for POWER9 MMU Paul Mackerras
2017-01-12 9:07 ` [PATCH 10/18] KVM: PPC: Book3S HV: Set process table for HPT guests on POWER9 Paul Mackerras
2017-01-23 2:39 ` Suraj Jitindar Singh
2017-01-23 4:37 ` Paul Mackerras
2017-01-12 9:07 ` [PATCH 11/18] KVM: PPC: Book3S HV: Add basic infrastructure for radix guests Paul Mackerras
2017-01-12 9:07 ` [PATCH 12/18] KVM: PPC: Book3S HV: Modify guest entry/exit paths to handle " Paul Mackerras
2017-01-12 9:07 ` [PATCH 13/18] KVM: PPC: Book3S HV: Page table construction and page faults for " Paul Mackerras
2017-01-23 3:17 ` Suraj Jitindar Singh
2017-01-23 4:38 ` Paul Mackerras
2017-01-12 9:07 ` [PATCH 14/18] KVM: PPC: Book3S HV: MMU notifier callbacks " Paul Mackerras
2017-01-23 3:21 ` Suraj Jitindar Singh
2017-01-12 9:07 ` [PATCH 15/18] KVM: PPC: Book3S HV: Implement dirty page logging " Paul Mackerras
2017-01-12 9:07 ` [PATCH 16/18] KVM: PPC: Book3S HV: Make HPT-specific hypercalls return error in radix mode Paul Mackerras
2017-01-12 9:07 ` [PATCH 17/18] KVM: PPC: Book3S HV: Enable radix guest support Paul Mackerras
2017-01-23 3:31 ` Suraj Jitindar Singh
2017-01-12 9:07 ` [PATCH 18/18] KVM: PPC: Book3S HV: Use ASDR for HPT guests on POWER9 Paul Mackerras
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