Just like SVCR, FPMR is currently stored at the wrong location.
Let's move it where it belongs.
Signed-off-by: Marc Zyngier <maz@xxxxxxxxxx>
---
arch/arm64/include/asm/kvm_host.h | 2 +-
arch/arm64/kvm/fpsimd.c | 2 +-
arch/arm64/kvm/sys_regs.c | 10 ++++++++++
3 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index e5cf8af54dd6..021f7a1845f2 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -448,6 +448,7 @@ enum vcpu_sysreg {
/* FP/SIMD/SVE */
SVCR,
+ FPMR,
/* 32bit specific registers. */
DACR32_EL2, /* Domain Access Control Register */
@@ -667,7 +668,6 @@ struct kvm_vcpu_arch {
void *sve_state;
enum fp_type fp_type;
unsigned int sve_max_vl;
- u64 fpmr;
/* Stage 2 paging state used by the hardware on next switch */
struct kvm_s2_mmu *hw_mmu;
diff --git a/arch/arm64/kvm/fpsimd.c b/arch/arm64/kvm/fpsimd.c
index e6425414d301..4cb8ad5d69a8 100644
--- a/arch/arm64/kvm/fpsimd.c
+++ b/arch/arm64/kvm/fpsimd.c
@@ -135,7 +135,7 @@ void kvm_arch_vcpu_ctxsync_fp(struct kvm_vcpu *vcpu)
fp_state.sve_vl = vcpu->arch.sve_max_vl;
fp_state.sme_state = NULL;
fp_state.svcr = &__vcpu_sys_reg(vcpu, SVCR);
- fp_state.fpmr = &vcpu->arch.fpmr;
+ fp_state.fpmr = &__vcpu_sys_reg(vcpu, FPMR);
fp_state.fp_type = &vcpu->arch.fp_type;
if (vcpu_has_sve(vcpu))
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 2dc6cab43b2f..79d67f19130d 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1678,6 +1678,15 @@ static unsigned int sme_visibility(const struct kvm_vcpu *vcpu,
return REG_HIDDEN;
}
+static unsigned int fp8_visibility(const struct kvm_vcpu *vcpu,
+ const struct sys_reg_desc *rd)
+{
+ if (kvm_has_fpmr(vcpu->kvm))
+ return 0;
+
+ return REG_HIDDEN;
+}
+
static u64 read_sanitised_id_aa64pfr0_el1(struct kvm_vcpu *vcpu,
const struct sys_reg_desc *rd)
{
@@ -2545,6 +2554,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
CTR_EL0_DminLine_MASK |
CTR_EL0_IminLine_MASK),
{ SYS_DESC(SYS_SVCR), undef_access, reset_val, SVCR, 0, .visibility = sme_visibility },
+ { SYS_DESC(SYS_FPMR), undef_access, reset_val, FPMR, 0, .visibility = fp8_visibility },
{ PMU_SYS_REG(PMCR_EL0), .access = access_pmcr, .reset = reset_pmcr,
.reg = PMCR_EL0, .get_user = get_pmcr, .set_user = set_pmcr },
--
2.39.2
