diff options
| author | Bill Traynor <wmat@riscv.org> | 2023-03-22 14:47:51 -0400 |
|---|---|---|
| committer | Bill Traynor <wmat@riscv.org> | 2023-03-22 14:47:51 -0400 |
| commit | d282be168046b0c393123138fbab4be5e602d2bc (patch) | |
| tree | bdc370952e3740669425a54ede763814485741a9 | |
| parent | ebf9e9d29ff1e5ecf7051a886e5ebf177cdf0d45 (diff) | |
| download | riscv-isa-manual-d282be168046b0c393123138fbab4be5e602d2bc.zip riscv-isa-manual-d282be168046b0c393123138fbab4be5e602d2bc.tar.gz riscv-isa-manual-d282be168046b0c393123138fbab4be5e602d2bc.tar.bz2 | |
Added admonition
Added missing admonition
| -rw-r--r-- | src/hypervisor.adoc | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/hypervisor.adoc b/src/hypervisor.adoc index 6e717a8..8c59a27 100644 --- a/src/hypervisor.adoc +++ b/src/hypervisor.adoc @@ -818,6 +818,8 @@ effect. Attempts to execute a floating-point instruction when either field is 0 (Off) raise an illegal-instruction exception. Modifying the floating-point state when V=1 causes both fields to be set to 3 (Dirty). +[NOTE] +==== For a hypervisor to benefit from the extension context status, it must have its own copy in the HS-level `sstatus`, maintained independently of a guest OS running in VS-mode. While a version of the extension context @@ -828,6 +830,7 @@ VS-level software can change `vsstatus`.FS arbitrarily. If the HS-level hardware in parallel with `vsstatus`.FS while V=1, hypervisors would always be forced to conservatively swap all floating-point state when context-switching between virtual machines. +==== Similarly, when V=1, both `vsstatus`.VS and the HS-level `sstatus`.VS are in effect. Attempts to execute a vector instruction when either |