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ANDROID: KVM: arm64: Move __deactivate_fpsimd_traps() to switch.h

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Move __deactivate_fpsimd_traps() to the shared switch header, instead of
having separate implementations in the vhe/nvhe switch.c files.
Subsequent patches will remove all specific implementations from
switch.c and include switch.h in other files.

Bug: 411040189
Change-Id: I42c545e939b230366fbd9ad8e41a614193169bce
Signed-off-by: Fuad Tabba <tabba@google.com>
This commit is contained in:
Fuad Tabba
2025-05-01 13:21:50 +01:00
parent 290f5d0002
commit 051c5c53b0
3 changed files with 20 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
arch/arm64/kvm/hyp/include/hyp/switch.h
View File

@@ -329,7 +329,26 @@ static void kvm_hyp_handle_fpsimd_host(struct kvm_vcpu *vcpu)
}
}
static void __deactivate_fpsimd_traps(struct kvm_vcpu *vcpu);
static void __deactivate_fpsimd_traps(struct kvm_vcpu *vcpu)
{
u64 reg;
bool trap_sve = vcpu_has_sve(vcpu) ||
(is_protected_kvm_enabled() && system_supports_sve());
if (has_vhe() || has_hvhe()) {
reg = CPACR_EL1_FPEN_EL0EN | CPACR_EL1_FPEN_EL1EN;
if (trap_sve)
reg |= CPACR_EL1_ZEN_EL0EN | CPACR_EL1_ZEN_EL1EN;
sysreg_clear_set(cpacr_el1, 0, reg);
} else {
reg = CPTR_EL2_TFP;
if (trap_sve)
reg |= CPTR_EL2_TZ;
sysreg_clear_set(cptr_el2, reg, 0);
}
}
/*
* We trap the first access to the FP/SIMD to save the host context and

21
arch/arm64/kvm/hyp/nvhe/switch.c
View File

@@ -171,27 +171,6 @@ static void __deactivate_traps(struct kvm_vcpu *vcpu)
write_sysreg(__kvm_hyp_host_vector, vbar_el2);
}
static void __deactivate_fpsimd_traps(struct kvm_vcpu *vcpu)
{
u64 reg;
bool trap_sve = vcpu_has_sve(vcpu) ||
(is_protected_kvm_enabled() && system_supports_sve());
if (has_hvhe()) {
reg = CPACR_EL1_FPEN_EL0EN | CPACR_EL1_FPEN_EL1EN;
if (trap_sve)
reg |= CPACR_EL1_ZEN_EL0EN | CPACR_EL1_ZEN_EL1EN;
sysreg_clear_set(cpacr_el1, 0, reg);
} else {
reg = CPTR_EL2_TFP;
if (trap_sve)
reg |= CPTR_EL2_TZ;
sysreg_clear_set(cptr_el2, reg, 0);
}
}
/* Save VGICv3 state on non-VHE systems */
static void __hyp_vgic_save_state(struct kvm_vcpu *vcpu)
{

10
arch/arm64/kvm/hyp/vhe/switch.c
View File

@@ -163,16 +163,6 @@ void deactivate_traps_vhe_put(struct kvm_vcpu *vcpu)
local_irq_restore(flags);
}
static void __deactivate_fpsimd_traps(struct kvm_vcpu *vcpu)
{
u64 reg = CPACR_EL1_FPEN_EL0EN | CPACR_EL1_FPEN_EL1EN;
if (vcpu_has_sve(vcpu))
reg |= CPACR_EL1_ZEN_EL0EN | CPACR_EL1_ZEN_EL1EN;
sysreg_clear_set(cpacr_el1, 0, reg);
}
static const exit_handler_fn hyp_exit_handlers[] = {
[0 ... ESR_ELx_EC_MAX] = NULL,
[ESR_ELx_EC_CP15_32] = kvm_hyp_handle_cp15_32,