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| author | Michael Ellerman <mpe@ellerman.id.au> | 2017-10-12 21:17:58 +1100 |
|---|---|---|
| committer | Stewart Smith <stewart@linux.vnet.ibm.com> | 2017-10-16 21:51:28 -0500 |
| commit | 39ffacb9691a3a4e5fe543787dfe4e671b6979b8 (patch) | |
| tree | 26259a9021e2ed00cee6dec51606319983a1375f | |
| parent | 073cbf6bb0a1ceddf3c7974d04608ca10062951e (diff) | |
| download | skiboot-39ffacb9691a3a4e5fe543787dfe4e671b6979b8.zip skiboot-39ffacb9691a3a4e5fe543787dfe4e671b6979b8.tar.gz skiboot-39ffacb9691a3a4e5fe543787dfe4e671b6979b8.tar.bz2 | |
cpu: Add OPAL_REINIT_CPUS_TM_SUSPEND_DISABLED
Add a new CPU reinit flag, "TM Suspend Disabled", which requests that
CPUs be configured so that TM (Transactional Memory) suspend mode is
disabled.
Currently this always fails, because skiboot has no way to query the
state. A future hostboot change will add a mechanism for skiboot to
determine the status and return an appropriate error code.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
| -rw-r--r-- | core/cpu.c | 10 | ||||
| -rw-r--r-- | doc/opal-api/opal-reinit-cpus-70.rst | 8 | ||||
| -rw-r--r-- | include/opal-api.h | 2 |
3 files changed, 20 insertions, 0 deletions
@@ -1383,6 +1383,16 @@ static int64_t opal_reinit_cpus(uint64_t flags) flags &= ~(OPAL_REINIT_CPUS_HILE_BE | OPAL_REINIT_CPUS_HILE_LE); } + if (flags & OPAL_REINIT_CPUS_TM_SUSPEND_DISABLED) { + flags &= ~OPAL_REINIT_CPUS_TM_SUSPEND_DISABLED; + + /* + * Pending a hostboot change we can't determine the status of + * this, so it always fails. + */ + rc = OPAL_UNSUPPORTED; + } + /* Handle P8 DD1 SLW reinit */ if (flags != 0 && proc_gen == proc_gen_p8 && !hile_supported) rc = slw_reinit(flags); diff --git a/doc/opal-api/opal-reinit-cpus-70.rst b/doc/opal-api/opal-reinit-cpus-70.rst index 0eb6704..bee350d 100644 --- a/doc/opal-api/opal-reinit-cpus-70.rst +++ b/doc/opal-api/opal-reinit-cpus-70.rst @@ -17,6 +17,7 @@ Currently, possible flags are: :: OPAL_REINIT_CPUS_HILE_LE = (1 << 1), OPAL_REINIT_CPUS_MMU_HASH = (1 << 2), OPAL_REINIT_CPUS_MMU_RADIX = (1 << 3), + OPAL_REINIT_CPUS_TM_SUSPEND_DISABLED = (1 << 4), }; Extra flags may be added in the future, so other bits *must* be 0. @@ -30,6 +31,13 @@ are support and other bits *MUST NOT* be set. On POWER9 CPUs, all options including OPAL_REINIT_CPUS_MMU_HASH and OPAL_REINIT_CPUS_MMU_RADIX. +OPAL_REINIT_CPUS_TM_SUSPEND_DISABLED +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +This flag requests that CPUs be configured with TM (Transactional Memory) +suspend mode disabled. This may only be supported on some CPU versions. + + Returns ------- diff --git a/include/opal-api.h b/include/opal-api.h index 0ff0db0..0bc036e 100644 --- a/include/opal-api.h +++ b/include/opal-api.h @@ -1033,6 +1033,8 @@ enum { */ OPAL_REINIT_CPUS_MMU_HASH = (1 << 2), OPAL_REINIT_CPUS_MMU_RADIX = (1 << 3), + + OPAL_REINIT_CPUS_TM_SUSPEND_DISABLED = (1 << 4), }; typedef struct oppanel_line { |