[v1,27/36] target/riscv: Disable guest FP support based on virtual status
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Message ID 36e8fafd2d2e16a50820c6a27850a413a89d941b.1575914822.git.alistair.francis@wdc.com
State New
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Series
  • Add RISC-V Hypervisor Extension v0.5
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Commit Message

Alistair Francis Dec. 9, 2019, 6:11 p.m. UTC
When the Hypervisor extension is in use we only enable floating point
support when both status and vsstatus have enabled floating point
support.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Palmer Dabbelt <palmer@sifive.com>
---
 target/riscv/cpu_helper.c | 3 +++
 1 file changed, 3 insertions(+)

Patch
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diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index 2c6d2bc3a3..2040fc0208 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -99,6 +99,9 @@  bool riscv_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
 bool riscv_cpu_fp_enabled(CPURISCVState *env)
 {
     if (*env->mstatus & MSTATUS_FS) {
+        if (riscv_cpu_virt_enabled(env) && !(env->vsstatus & MSTATUS_FS)) {
+            return false;
+        }
         return true;
     }