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lizongfengselftests: KVM: Handle compiler optimizations in ucall

cde34140创建于 2022年11月15日历史提交

文件	最后提交记录	最后更新时间
processor.c	selftests: kvm: Add exception handling to selftests Add the infrastructure needed to enable exception handling in selftests. This allows any of the exception and interrupt vectors to be overridden in the guest. Signed-off-by: Aaron Lewis <aaronlewis@google.com> Reviewed-by: Alexander Graf <graf@amazon.com> Message-Id: <20201012194716.3950330-4-aaronlewis@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>	5 年前
ucall.c	selftests: KVM: Handle compiler optimizations in ucall stable inclusion from stable-5.10.136 commit 50763f0ac0706e63c0ba550adccfca25eb3d0667 category: bugfix issue: #I4UU4A CVE: NA Signed-off-by: lizongfeng <lizongfeng1@huawei.com> --------------------------------------- [ Upstream commit 9e2f6498efbbc880d7caa7935839e682b64fe5a6 ] The selftests, when built with newer versions of clang, is found to have over optimized guests' ucall() function, and eliminating the stores for uc.cmd (perhaps due to no immediate readers). This resulted in the userspace side always reading a value of '0', and causing multiple test failures. As a result, prevent the compiler from optimizing the stores in ucall() with WRITE_ONCE(). Suggested-by: Ricardo Koller <ricarkol@google.com> Suggested-by: Reiji Watanabe <reijiw@google.com> Signed-off-by: Raghavendra Rao Ananta <rananta@google.com> Message-Id: <20220615185706.1099208-1-rananta@google.com> Reviewed-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: lizongfeng <lizongfeng1@huawei.com>	3 年前