From: Nicholas Piggin <npiggin@gmail.com>
Cc: linuxppc-dev@lists.ozlabs.org, Nicholas Piggin <npiggin@gmail.com>
Subject: [PATCH 0/7] powerpc: branch cache flush changes
Date: Tue, 9 Jun 2020 16:16:24 +1000 [thread overview]
Message-ID: <20200609061631.844390-1-npiggin@gmail.com> (raw)
This series allows the link stack to be flushed with the speical
bcctr 2,0,0 flush instruction that also flushes the count cache if
the processor supports it.
Firmware does not support this at the moment, but I've tested it in
simulator with a patched firmware to advertise support.
Thanks,
Nick
Nicholas Piggin (7):
powerpc/security: re-name count cache flush to branch cache flush
powerpc/security: change link stack flush state to the flush type enum
powerpc/security: make display of branch cache flush more consistent
powerpc/security: split branch cache flush toggle from code patching
powerpc/64s: Move branch cache flushing bcctr variant to ppc-ops.h
powerpc/security: Allow for processors that flush the link stack using
the special bcctr
powerpc/64s: advertise hardware link stack flush
arch/powerpc/include/asm/asm-prototypes.h | 4 +-
arch/powerpc/include/asm/hvcall.h | 1 +
arch/powerpc/include/asm/ppc-opcode.h | 2 +
arch/powerpc/include/asm/security_features.h | 2 +
arch/powerpc/include/uapi/asm/kvm.h | 1 +
arch/powerpc/kernel/entry_64.S | 13 +-
arch/powerpc/kernel/security.c | 139 +++++++++++--------
arch/powerpc/kvm/powerpc.c | 9 +-
arch/powerpc/platforms/powernv/setup.c | 3 +
arch/powerpc/platforms/pseries/setup.c | 3 +
tools/arch/powerpc/include/uapi/asm/kvm.h | 1 +
11 files changed, 106 insertions(+), 72 deletions(-)
--
2.23.0
next reply other threads:[~2020-06-09 7:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-09 6:16 Nicholas Piggin [this message]
2020-06-09 6:16 ` [PATCH 1/7] powerpc/security: re-name count cache flush to branch cache flush Nicholas Piggin
2020-06-09 6:16 ` [PATCH 2/7] powerpc/security: change link stack flush state to the flush type enum Nicholas Piggin
2020-06-09 6:16 ` [PATCH 3/7] powerpc/security: make display of branch cache flush more consistent Nicholas Piggin
2020-06-09 6:16 ` [PATCH 4/7] powerpc/security: split branch cache flush toggle from code patching Nicholas Piggin
2020-06-09 6:16 ` [PATCH 5/7] powerpc/64s: Move branch cache flushing bcctr variant to ppc-ops.h Nicholas Piggin
2020-06-09 6:16 ` [PATCH 6/7] powerpc/security: Allow for processors that flush the link stack using the special bcctr Nicholas Piggin
2020-06-09 6:16 ` [PATCH 7/7] powerpc/64s: advertise hardware link stack flush Nicholas Piggin
2020-06-09 7:06 [PATCH 0/7] powerpc: branch cache flush changes Nicholas Piggin
2020-07-16 12:56 ` Michael Ellerman
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