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| author | Oliver Upton <oliver.upton@linux.dev> | 2022-09-13 09:44:36 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-09-14 11:36:16 +0100 |
| commit | cdd5036d048ca96ef5212fb37f4f56db40cb1bc2 (patch) | |
| tree | 0ebcb8d7fbf562b25e0451e2c7912ed9cd7c8736 /arch/arm64 | |
| parent | 4782ccc8ef50fabb70bab9fa73186285dba6d91d (diff) | |
| download | linux-stable-cdd5036d048ca96ef5212fb37f4f56db40cb1bc2.tar.gz linux-stable-cdd5036d048ca96ef5212fb37f4f56db40cb1bc2.tar.bz2 linux-stable-cdd5036d048ca96ef5212fb37f4f56db40cb1bc2.zip | |
KVM: arm64: Drop raz parameter from read_id_reg()
There is no longer a need for caller-specified RAZ visibility. Hoist the
call to sysreg_visible_as_raz() into read_id_reg() and drop the
parameter.
No functional change intended.
Suggested-by: Reiji Watanabe <reijiw@google.com>
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/20220913094441.3957645-4-oliver.upton@linux.dev
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 26210f3a0b27..0e20a311ea20 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1063,13 +1063,12 @@ static bool access_arch_timer(struct kvm_vcpu *vcpu, } /* Read a sanitised cpufeature ID register by sys_reg_desc */ -static u64 read_id_reg(const struct kvm_vcpu *vcpu, - struct sys_reg_desc const *r, bool raz) +static u64 read_id_reg(const struct kvm_vcpu *vcpu, struct sys_reg_desc const *r) { u32 id = reg_to_encoding(r); u64 val; - if (raz) + if (sysreg_visible_as_raz(vcpu, r)) return 0; val = read_sanitised_ftr_reg(id); @@ -1157,12 +1156,10 @@ 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); - if (p->is_write) return write_to_read_only(vcpu, p, r); - p->regval = read_id_reg(vcpu, r, raz); + p->regval = read_id_reg(vcpu, r); return true; } @@ -1199,7 +1196,7 @@ static int set_id_aa64pfr0_el1(struct kvm_vcpu *vcpu, return -EINVAL; /* We can only differ with CSV[23], and anything else is an error */ - val ^= read_id_reg(vcpu, rd, false); + val ^= read_id_reg(vcpu, rd); val &= ~((0xFUL << ID_AA64PFR0_CSV2_SHIFT) | (0xFUL << ID_AA64PFR0_CSV3_SHIFT)); if (val) @@ -1221,19 +1218,15 @@ static int set_id_aa64pfr0_el1(struct kvm_vcpu *vcpu, 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); - - *val = read_id_reg(vcpu, rd, raz); + *val = read_id_reg(vcpu, rd); return 0; } static int set_id_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, u64 val) { - bool raz = sysreg_visible_as_raz(vcpu, rd); - /* This is what we mean by invariant: you can't change it. */ - if (val != read_id_reg(vcpu, rd, raz)) + if (val != read_id_reg(vcpu, rd)) return -EINVAL; return 0; |