[v2] Skip SNP initialization if CPUs are offlined

[PATCH v2 0/2] Skip SNP initialization if CPUs are offlined

Tycho Andersen posted 2 patches 2 months, 1 week ago

Diff against v3
Download series mbox

There is a newer version of this series

arch/x86/include/asm/sev.h   |  4 ++--
arch/x86/virt/svm/sev.c      | 15 +++++++++++++--
drivers/crypto/ccp/sev-dev.c |  4 +++-
3 files changed, 18 insertions(+), 5 deletions(-)

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[PATCH v2 0/2] Skip SNP initialization if CPUs are offlined

Posted by Tycho Andersen 2 months, 1 week ago

From: "Tycho Andersen (AMD)" <tycho@kernel.org>

Here's a v2 of the series. Changes are:

* propagate the error from snp_prepare() through __sev_snp_init_locked()
* use cpus_present_mask instead of cpus_possible_mask to reason about
  the set of available CPUs
* print the CPU masks for easier debugging

It turns out that CONFIG_INIT_ALL_POSSIBLE is not user-settable, and
only parisc selects it, so it shouldn't be a problem here.

v1 is here: https://lore.kernel.org/all/20260401143552.3038979-1-tycho@kernel.org/

Tycho Andersen (AMD) (2):
  x86/sev: Do not initialize SNP if missing CPUs
  crypto/ccp: Skip SNP_INIT if preparation fails

 arch/x86/include/asm/sev.h   |  4 ++--
 arch/x86/virt/svm/sev.c      | 15 +++++++++++++--
 drivers/crypto/ccp/sev-dev.c |  4 +++-
 3 files changed, 18 insertions(+), 5 deletions(-)


base-commit: 6c927e5ca9d238f8ae40b453a8382eb9cf4ee855
-- 
2.53.0