diff options
| author |   Oliver Upton <oliver.upton@linux.dev> | 2022-09-13 09:44:35 +0000 |
|---|---|---|
| committer |   Marc Zyngier <maz@kernel.org> | 2022-09-14 11:36:16 +0100 |
| commit | 4782ccc8ef50fabb70bab9fa73186285dba6d91d (patch) | |
| tree | 633e342adbb2baf54b7cee5161bac6a0ce2cbd24 | |
| parent | KVM: arm64: Use visibility hook to treat ID regs as RAZ (diff) | |
| download | linux-dev-4782ccc8ef50fabb70bab9fa73186285dba6d91d.tar.xz linux-dev-4782ccc8ef50fabb70bab9fa73186285dba6d91d.zip | |
KVM: arm64: Remove internal accessor helpers for id regs
The internal accessors are only ever called once. Dump out their
contents in the caller.
No functional change intended.
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220913094441.3957645-3-oliver.upton@linux.dev
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 46 |
1 files changed, 12 insertions, 34 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index e18efb9211f0..26210f3a0b27 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1153,25 +1153,17 @@ static unsigned int raz_visibility(const struct kvm_vcpu *vcpu, /* cpufeature ID register access trap handlers */ -static bool __access_id_reg(struct kvm_vcpu *vcpu, - struct sys_reg_params *p, - const struct sys_reg_desc *r, - bool raz) -{ - if (p->is_write) - return write_to_read_only(vcpu, p, r); - - p->regval = read_id_reg(vcpu, r, raz); - return true; -} - static bool access_id_reg(struct kvm_vcpu *vcpu, struct sys_reg_params *p, const struct sys_reg_desc *r) { bool raz = sysreg_visible_as_raz(vcpu, r); - return __access_id_reg(vcpu, p, r, raz); + if (p->is_write) + return write_to_read_only(vcpu, p, r); + + p->regval = read_id_reg(vcpu, r, raz); + return true; } /* Visibility overrides for SVE-specific control registers */ @@ -1226,31 +1218,13 @@ static int set_id_aa64pfr0_el1(struct kvm_vcpu *vcpu, * are stored, and for set_id_reg() we don't allow the effective value * to be changed. */ -static int __get_id_reg(const struct kvm_vcpu *vcpu, - const struct sys_reg_desc *rd, u64 *val, - bool raz) -{ - *val = read_id_reg(vcpu, rd, raz); - return 0; -} - -static int __set_id_reg(const struct kvm_vcpu *vcpu, - const struct sys_reg_desc *rd, u64 val, - bool raz) -{ - /* This is what we mean by invariant: you can't change it. */ - if (val != read_id_reg(vcpu, rd, raz)) - return -EINVAL; - - return 0; -} - static int get_id_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, u64 *val) { bool raz = sysreg_visible_as_raz(vcpu, rd); - return __get_id_reg(vcpu, rd, val, raz); + *val = read_id_reg(vcpu, rd, raz); + return 0; } static int set_id_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, @@ -1258,7 +1232,11 @@ static int set_id_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, { bool raz = sysreg_visible_as_raz(vcpu, rd); - return __set_id_reg(vcpu, rd, val, raz); + /* This is what we mean by invariant: you can't change it. */ + if (val != read_id_reg(vcpu, rd, raz)) + return -EINVAL; + + return 0; } static int get_raz_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, |