Commit 32876224 authored by Marc Zyngier's avatar Marc Zyngier

arm64: KVM: VHE: Make __fpsimd_enabled VHE aware

As non-VHE and VHE have different ways to express the trapping of
FPSIMD registers to EL2, make __fpsimd_enabled a patchable predicate
and provide a VHE implementation.
Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent d1526e5e
......@@ -216,4 +216,7 @@
ECN(SOFTSTP_CUR), ECN(WATCHPT_LOW), ECN(WATCHPT_CUR), \
ECN(BKPT32), ECN(VECTOR32), ECN(BRK64)
#define CPACR_EL1_FPEN (3 << 20)
#define CPACR_EL1_TTA (1 << 28)
#endif /* __ARM64_KVM_ARM_H__ */
......@@ -171,10 +171,7 @@ void __debug_cond_restore_host_state(struct kvm_vcpu *vcpu);
void __fpsimd_save_state(struct user_fpsimd_state *fp_regs);
void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs);
static inline bool __fpsimd_enabled(void)
{
return !(read_sysreg(cptr_el2) & CPTR_EL2_TFP);
}
bool __fpsimd_enabled(void);
u64 __guest_enter(struct kvm_vcpu *vcpu, struct kvm_cpu_context *host_ctxt);
void __noreturn __hyp_do_panic(unsigned long, ...);
......
......@@ -17,6 +17,25 @@
#include "hyp.h"
static bool __hyp_text __fpsimd_enabled_nvhe(void)
{
return !(read_sysreg(cptr_el2) & CPTR_EL2_TFP);
}
static bool __hyp_text __fpsimd_enabled_vhe(void)
{
return !!(read_sysreg(cpacr_el1) & CPACR_EL1_FPEN);
}
static hyp_alternate_select(__fpsimd_is_enabled,
__fpsimd_enabled_nvhe, __fpsimd_enabled_vhe,
ARM64_HAS_VIRT_HOST_EXTN);
bool __hyp_text __fpsimd_enabled(void)
{
return __fpsimd_is_enabled()();
}
static void __hyp_text __activate_traps(struct kvm_vcpu *vcpu)
{
u64 val;
......
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