| Age | Commit message (Collapse) | Author | Files | Lines |
|---|
|
[ Upstream commit 17975a6e645768c4651199055052a13858db6506 ]
Despite the major version of PVR being 1 (0x004c0100) for POWER8NVL,
these chips are functionally equalent to P8/P8E DD2 levels.
This advertises POWER8NVL as DD2. As the result, skiboot adds
ibm,powerpc-cpu-features/processor-control-facility for such CPUs and
the linux kernel can use hypervisor doorbell messages to wake secondary
threads; otherwise "KVM: CPU %d seems to be stuck" would appear because
of missing LPCR_PECEDH.
Fixes: 7f4c8e8ce0b "dt: add /cpus/ibm, powerpc-cpu-features device tree bindings"
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
|
|
DARN and SCV has been assigned AT_HWCAP2 (32-63) bits:
#define PPC_FEATURE2_DARN 0x00200000 /* darn random number insn */
#define PPC_FEATURE2_SCV 0x00100000 /* scv syscall */
A cpufeatures-aware OS will not advertise these to userspace without
this patch.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
|
|
This is a new CPU feature advertising interface that is fine-grained,
extensible, aware of privilege levels, and gives control of features
to all levels of the stack (firmware, hypervisor, and OS).
The design and binding specification is described in detail in doc/.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[stewart: fix maybe-uninitialized warning from older GCC, doc cleanup]
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
|
