16 Sep, 2020
1 commit
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To make early kernel address space layout definition possible parse
prot_virt option in the decompressor and pass it to the uncompressed
kernel. This enables kasan to take ultravisor secure storage limit into
consideration and pre-define vmalloc position correctly.Signed-off-by: Vasily Gorbik
25 Apr, 2020
1 commit
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The kernel fails to compile with CONFIG_PROTECTED_VIRTUALIZATION_GUEST
set but CONFIG_KVM unset.This patch fixes the issue by making the needed variable always available.
Link: https://lkml.kernel.org/r/20200423120114.2027410-1-imbrenda@linux.ibm.com
Fixes: a0f60f843199 ("s390/protvirt: Add sysfs firmware interface for Ultravisor information")
Reported-by: kbuild test robot
Reported-by: Philipp Rudo
Suggested-by: Philipp Rudo
Reviewed-by: David Hildenbrand
Reviewed-by: Cornelia Huck
Reviewed-by: Vasily Gorbik
Acked-by: Christian Borntraeger
Signed-off-by: Claudio Imbrenda
Signed-off-by: Vasily Gorbik
28 Feb, 2020
1 commit
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Add "prot_virt" command line option which controls if the kernel
protected VMs support is enabled at early boot time. This has to be
done early, because it needs large amounts of memory and will disable
some features like STP time sync for the lpar.Extend ultravisor info definitions and expose it via uv_info struct
filled in during startup.Signed-off-by: Vasily Gorbik
Reviewed-by: Thomas Huth
Acked-by: David Hildenbrand
Reviewed-by: Cornelia Huck
Acked-by: Christian Borntraeger
[borntraeger@de.ibm.com: patch merging, splitting, fixing]
Signed-off-by: Christian Borntraeger
12 Feb, 2020
1 commit
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The query parameter block might contain additional information and can
be extended in the future. If the size of the block does not suffice we
get an error code of rc=0x100. The buffer will contain all information
up to the specified size and the hypervisor/guest simply do not need the
additional information as they do not know about the new data. That
means that we can (and must) accept rc=0x100 as success.Cc: stable@vger.kernel.org
Reviewed-by: Cornelia Huck
Fixes: 5abb9351dfd9 ("s390/uv: introduce guest side ultravisor code")
Signed-off-by: Christian Borntraeger
Signed-off-by: Vasily Gorbik
10 Apr, 2019
1 commit
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The Ultravisor Call Facility (stfle bit 158) defines an API to the
Ultravisor (UV calls), a mini hypervisor located at machine
level. With help of the Ultravisor, KVM will be able to run
"protected" VMs, special VMs whose memory and management data are
unavailable to KVM.The protected VMs can also request services from the Ultravisor.
The guest api consists of UV calls to share and unshare memory with the
kvm hypervisor.To enable this feature support PROTECTED_VIRTUALIZATION_GUEST kconfig
option has been introduced.Co-developed-by: Janosch Frank
Signed-off-by: Janosch Frank
Signed-off-by: Vasily Gorbik
Signed-off-by: Martin Schwidefsky