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2031f28768
Add wrappers to acquire/release KVM's SRCU lock when stashing the index in vcpu->src_idx, along with rudimentary detection of illegal usage, e.g. re-acquiring SRCU and thus overwriting vcpu->src_idx. Because the SRCU index is (currently) either 0 or 1, illegal nesting bugs can go unnoticed for quite some time and only cause problems when the nested lock happens to get a different index. Wrap the WARNs in PROVE_RCU=y, and make them ONCE, otherwise KVM will likely yell so loudly that it will bring the kernel to its knees. Signed-off-by: Sean Christopherson <seanjc@google.com> Tested-by: Fabiano Rosas <farosas@linux.ibm.com> Message-Id: <20220415004343.2203171-4-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
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.. | ||
boot | ||
configs | ||
crypto | ||
include | ||
kernel | ||
kexec | ||
kvm | ||
lib | ||
math-emu | ||
mm | ||
net | ||
perf | ||
platforms | ||
purgatory | ||
sysdev | ||
tools | ||
xmon | ||
Kbuild | ||
Kconfig | ||
Kconfig.debug | ||
Makefile | ||
Makefile.postlink |