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Serialize AArch64 timestamp counter #15

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Serialize AArch64 timestamp counter #15

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4 changes: 3 additions & 1 deletion src/time/timestamp/tsc/aarch64.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,9 @@ pub(crate) fn timestamp() -> u64 {
unsafe {
let timestamp: u64;
asm!(
"mrs {}, cntvct_el0",
"isb sy
mrs {}, cntvct_el0
isb sy",
out(reg) timestamp,
// Leave off `nomem` because this should be a compiler fence.
options(nostack, preserves_flags),
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