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b445e26cbf
linux_dsm_epyc7002/arch/sparc64/kernel
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David S. Miller b445e26cbf [SPARC64]: Avoid membar instructions in delay slots. 
In particular, avoid membar instructions in the delay
slot of a jmpl instruction.

UltraSPARC-I, II, IIi, and IIe have a bug, documented in
the UltraSPARC-IIi User's Manual, Appendix K, Erratum 51

The long and short of it is that if the IMU unit misses
on a branch or jmpl, and there is a store buffer synchronizing
membar in the delay slot, the chip can stop fetching instructions.

If interrupts are enabled or some other trap is enabled, the
chip will unwedge itself, but performance will suffer.

We already had a workaround for this bug in a few spots, but
it's better to have the entire tree sanitized for this rule.

Signed-off-by: David S. Miller <davem@davemloft.net>
2005-06-27 15:42:04 -07:00
..
auxio.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
binfmt_aout32.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
binfmt_elf32.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
central.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
chmc.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
cpu.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
devices.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dtlb_backend.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dtlb_base.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
dtlb_prot.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ebus.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
entry.S [SPARC64]: Avoid membar instructions in delay slots. 2005-06-27 15:42:04 -07:00
etrap.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
head.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
idprom.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
init_task.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
ioctl32.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
iommu_common.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
iommu_common.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
irq.c [SPARC64]: Disable IRQ forwarding. 2005-05-03 22:05:43 -07:00
isa.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
itlb_base.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
kprobes.c [PATCH] kprobes: Temporary disarming of reentrant probe for sparc64 2005-06-23 09:45:25 -07:00
Makefile Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
module.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci_common.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci_impl.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
pci_iommu.c [SPARC64]: Refine PCI strbuf ctx-based flush. 2005-05-31 19:13:52 -07:00
pci_psycho.c [SPARC64]: Fix streaming buffer flushing on PCI and SBUS. 2005-05-31 16:57:59 -07:00
pci_sabre.c [SPARC64]: Fix streaming buffer flushing on PCI and SBUS. 2005-05-31 16:57:59 -07:00
pci_schizo.c [SPARC64]: Fix streaming buffer flushing on PCI and SBUS. 2005-05-31 16:57:59 -07:00
pci.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
power.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
process.c [SPARC]: Remove legacy stuff from cpu_idle(). 2005-05-05 14:53:01 -07:00
ptrace.c [PATCH] convert that currently tests _NSIG directly to use valid_signal() 2005-05-01 08:59:14 -07:00
rtrap.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sbus.c [SPARC64]: Fix streaming buffer flushing on PCI and SBUS. 2005-05-31 16:57:59 -07:00
semaphore.c [SPARC64]: Avoid membar instructions in delay slots. 2005-06-27 15:42:04 -07:00
setup.c [SPARC64]: Add boot option to force UltraSPARC-III P-Cache on. 2005-05-23 15:52:08 -07:00
signal32.c [PATCH] compat: introduce compat_time_t 2005-06-23 09:45:32 -07:00
signal.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
smp.c [SPARC64]: Add boot option to force UltraSPARC-III P-Cache on. 2005-05-23 15:52:08 -07:00
sparc64_ksyms.c [SPARC64]: Kill useless __pte_alloc_one_kernel indirection 2005-05-05 14:27:56 -07:00
starfire.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sunos_ioctl32.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sys32.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sys_sparc32.c [PATCH] sparc64: Fix stat 2005-04-18 15:13:15 -07:00
sys_sparc.c [PATCH] Avoiding mmap fragmentation 2005-06-21 18:46:16 -07:00
sys_sunos32.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
systbls.S [PATCH] sparc64: Fix stat 2005-04-18 15:13:15 -07:00
time.c [PATCH] mostek bogus sparse annotations fixed 2005-04-24 12:28:36 -07:00
trampoline.S [SPARC64]: Avoid membar instructions in delay slots. 2005-06-27 15:42:04 -07:00
traps.c [SPARC64]: Add boot option to force UltraSPARC-III P-Cache on. 2005-05-23 15:52:08 -07:00
ttable.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
unaligned.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
us2e_cpufreq.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
us3_cpufreq.c Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
vmlinux.lds.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
winfixup.S Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00