Michael Ellerman <m...@ellerman.id.au> writes:
> Thiago Jung Bauermann <bauer...@linux.ibm.com> writes: >> From: Anshuman Khandual <khand...@linux.vnet.ibm.com> >> >> LPPACA structures need to be shared with the host. Hence they need to be in >> shared memory. Instead of allocating individual chunks of memory for a >> given structure from memblock, a contiguous chunk of memory is allocated >> and then converted into shared memory. Subsequent allocation requests will >> come from the contiguous chunk which will be always shared memory for all >> structures. >> >> While we are able to use a kmem_cache constructor for the Debug Trace Log, >> LPPACAs are allocated very early in the boot process (before SLUB is >> available) so we need to use a simpler scheme here. >> >> Introduce helper is_svm_platform() which uses the S bit of the MSR to tell >> whether we're running as a secure guest. >> >> Signed-off-by: Anshuman Khandual <khand...@linux.vnet.ibm.com> >> Signed-off-by: Thiago Jung Bauermann <bauer...@linux.ibm.com> >> --- >> arch/powerpc/include/asm/svm.h | 26 ++++++++++++++++++++ >> arch/powerpc/kernel/paca.c | 43 +++++++++++++++++++++++++++++++++- >> 2 files changed, 68 insertions(+), 1 deletion(-) >> >> diff --git a/arch/powerpc/include/asm/svm.h b/arch/powerpc/include/asm/svm.h >> new file mode 100644 >> index 000000000000..fef3740f46a6 >> --- /dev/null >> +++ b/arch/powerpc/include/asm/svm.h >> @@ -0,0 +1,26 @@ >> +/* SPDX-License-Identifier: GPL-2.0+ */ >> +/* >> + * SVM helper functions >> + * >> + * Copyright 2019 Anshuman Khandual, IBM Corporation. > > Are we sure this copyright date is correct? I may be confused about which year the copyright refers to. I thought it was the year when the patch was committed. If it is the first time the patch was published then this one should be 2018. -- Thiago Jung Bauermann IBM Linux Technology Center
