diff options
| author | Sean Christopherson <[email protected]> | 2020-01-17 11:30:49 -0800 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2020-01-27 19:59:46 +0100 |
| commit | c9aef3b85f425d1f6635382ec210ee5a7ef55d7d (patch) | |
| tree | 0c9d69660d52db94d2f1bd95b41de007ee454e6b /tools/perf/util/trace-event-scripting.c | |
| parent | 3911b65ee1d3e3fc5e3786b1f309dcad0e33f7fd (diff) | |
KVM: x86: Handle TIF_NEED_FPU_LOAD in kvm_{load,put}_guest_fpu()
Handle TIF_NEED_FPU_LOAD similar to how fpu__copy() handles the flag
when duplicating FPU state to a new task struct. TIF_NEED_FPU_LOAD can
be set any time control is transferred out of KVM, be it voluntarily,
e.g. if I/O is triggered during a KVM call to get_user_pages, or
involuntarily, e.g. if softirq runs after an IRQ occurs. Therefore,
KVM must account for TIF_NEED_FPU_LOAD whenever it is (potentially)
accessing CPU FPU state.
Fixes: 5f409e20b7945 ("x86/fpu: Defer FPU state load until return to userspace")
Cc: [email protected]
Signed-off-by: Sean Christopherson <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions