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| author |   Andrew Jones <drjones@redhat.com> | 2020-11-05 10:10:20 +0100 |
|---|---|---|
| committer |   Marc Zyngier <maz@kernel.org> | 2020-11-06 16:00:29 +0000 |
| commit | 01fe5ace92ddb8732e3331355e7ba9cb6f2ef787 (patch) | |
| tree | dca1e8cd0f970c075cfcae74d33df897af8cbcb9 /arch | |
| parent | KVM: arm64: Don't hide ID registers from userspace (diff) | |
| download | linux-dev-01fe5ace92ddb8732e3331355e7ba9cb6f2ef787.tar.xz linux-dev-01fe5ace92ddb8732e3331355e7ba9cb6f2ef787.zip | |
KVM: arm64: Consolidate REG_HIDDEN_GUEST/USER
REG_HIDDEN_GUEST and REG_HIDDEN_USER are always used together.
Consolidate them into a single REG_HIDDEN flag. We can always
add another flag later if some register needs to expose itself
differently to the guest than it does to userspace.
No functional change intended.
Signed-off-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20201105091022.15373-3-drjones@redhat.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 12 | ||||
| -rw-r--r-- | arch/arm64/kvm/sys_regs.h | 18 |
2 files changed, 10 insertions, 20 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 3af306e6b9cd..26a285127620 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1069,7 +1069,7 @@ static bool trap_ptrauth(struct kvm_vcpu *vcpu, static unsigned int ptrauth_visibility(const struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd) { - return vcpu_has_ptrauth(vcpu) ? 0 : REG_HIDDEN_USER | REG_HIDDEN_GUEST; + return vcpu_has_ptrauth(vcpu) ? 0 : REG_HIDDEN; } #define __PTRAUTH_KEY(k) \ @@ -1190,7 +1190,7 @@ static unsigned int sve_visibility(const struct kvm_vcpu *vcpu, if (vcpu_has_sve(vcpu)) return 0; - return REG_HIDDEN_USER | REG_HIDDEN_GUEST; + return REG_HIDDEN; } /* Generate the emulated ID_AA64ZFR0_EL1 value exposed to the guest */ @@ -2153,7 +2153,7 @@ static void perform_access(struct kvm_vcpu *vcpu, trace_kvm_sys_access(*vcpu_pc(vcpu), params, r); /* Check for regs disabled by runtime config */ - if (sysreg_hidden_from_guest(vcpu, r)) { + if (sysreg_hidden(vcpu, r)) { kvm_inject_undefined(vcpu); return; } @@ -2652,7 +2652,7 @@ int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg return get_invariant_sys_reg(reg->id, uaddr); /* Check for regs disabled by runtime config */ - if (sysreg_hidden_from_user(vcpu, r)) + if (sysreg_hidden(vcpu, r)) return -ENOENT; if (r->get_user) @@ -2677,7 +2677,7 @@ int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg return set_invariant_sys_reg(reg->id, uaddr); /* Check for regs disabled by runtime config */ - if (sysreg_hidden_from_user(vcpu, r)) + if (sysreg_hidden(vcpu, r)) return -ENOENT; if (r->set_user) @@ -2748,7 +2748,7 @@ static int walk_one_sys_reg(const struct kvm_vcpu *vcpu, if (!(rd->reg || rd->get_user)) return 0; - if (sysreg_hidden_from_user(vcpu, rd)) + if (sysreg_hidden(vcpu, rd)) return 0; if (!copy_reg_to_user(rd, uind)) diff --git a/arch/arm64/kvm/sys_regs.h b/arch/arm64/kvm/sys_regs.h index 5a6fc30f5989..2641b2ee6a91 100644 --- a/arch/arm64/kvm/sys_regs.h +++ b/arch/arm64/kvm/sys_regs.h @@ -59,8 +59,7 @@ struct sys_reg_desc { const struct sys_reg_desc *rd); }; -#define REG_HIDDEN_USER (1 << 0) /* hidden from userspace ioctls */ -#define REG_HIDDEN_GUEST (1 << 1) /* hidden from guest */ +#define REG_HIDDEN (1 << 0) /* hidden from userspace and guest */ static __printf(2, 3) inline void print_sys_reg_msg(const struct sys_reg_params *p, @@ -111,22 +110,13 @@ static inline void reset_val(struct kvm_vcpu *vcpu, const struct sys_reg_desc *r __vcpu_sys_reg(vcpu, r->reg) = r->val; } -static inline bool sysreg_hidden_from_guest(const struct kvm_vcpu *vcpu, - const struct sys_reg_desc *r) -{ - if (likely(!r->visibility)) - return false; - - return r->visibility(vcpu, r) & REG_HIDDEN_GUEST; -} - -static inline bool sysreg_hidden_from_user(const struct kvm_vcpu *vcpu, - const struct sys_reg_desc *r) +static inline bool sysreg_hidden(const struct kvm_vcpu *vcpu, + const struct sys_reg_desc *r) { if (likely(!r->visibility)) return false; - return r->visibility(vcpu, r) & REG_HIDDEN_USER; + return r->visibility(vcpu, r) & REG_HIDDEN; } static inline int cmp_sys_reg(const struct sys_reg_desc *i1, |