From 34b4d20399e6fad2e3379b11e68dff1d1549274e Mon Sep 17 00:00:00 2001 From: Oliver Upton Date: Tue, 13 Sep 2022 09:44:34 +0000 Subject: KVM: arm64: Use visibility hook to treat ID regs as RAZ The generic id reg accessors already handle RAZ registers by way of the visibility hook. Add a visibility hook that returns REG_RAZ unconditionally and throw out the RAZ specific accessors. Reviewed-by: Reiji Watanabe Signed-off-by: Oliver Upton Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220913094441.3957645-2-oliver.upton@linux.dev --- arch/arm64/kvm/sys_regs.c | 33 ++++++++++++++------------------- 1 file changed, 14 insertions(+), 19 deletions(-) (limited to 'arch/arm64/kvm/sys_regs.c') diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 3234f50b8c4b..e18efb9211f0 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1145,6 +1145,12 @@ static unsigned int id_visibility(const struct kvm_vcpu *vcpu, return 0; } +static unsigned int raz_visibility(const struct kvm_vcpu *vcpu, + const struct sys_reg_desc *r) +{ + return REG_RAZ; +} + /* cpufeature ID register access trap handlers */ static bool __access_id_reg(struct kvm_vcpu *vcpu, @@ -1168,13 +1174,6 @@ static bool access_id_reg(struct kvm_vcpu *vcpu, return __access_id_reg(vcpu, p, r, raz); } -static bool access_raz_id_reg(struct kvm_vcpu *vcpu, - struct sys_reg_params *p, - const struct sys_reg_desc *r) -{ - return __access_id_reg(vcpu, p, r, true); -} - /* Visibility overrides for SVE-specific control registers */ static unsigned int sve_visibility(const struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd) @@ -1262,12 +1261,6 @@ static int set_id_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, return __set_id_reg(vcpu, rd, val, raz); } -static int set_raz_id_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, - u64 val) -{ - return __set_id_reg(vcpu, rd, val, true); -} - static int get_raz_reg(struct kvm_vcpu *vcpu, const struct sys_reg_desc *rd, u64 *val) { @@ -1374,9 +1367,10 @@ static unsigned int mte_visibility(const struct kvm_vcpu *vcpu, */ #define ID_UNALLOCATED(crm, op2) { \ Op0(3), Op1(0), CRn(0), CRm(crm), Op2(op2), \ - .access = access_raz_id_reg, \ - .get_user = get_raz_reg, \ - .set_user = set_raz_id_reg, \ + .access = access_id_reg, \ + .get_user = get_id_reg, \ + .set_user = set_id_reg, \ + .visibility = raz_visibility \ } /* @@ -1386,9 +1380,10 @@ static unsigned int mte_visibility(const struct kvm_vcpu *vcpu, */ #define ID_HIDDEN(name) { \ SYS_DESC(SYS_##name), \ - .access = access_raz_id_reg, \ - .get_user = get_raz_reg, \ - .set_user = set_raz_id_reg, \ + .access = access_id_reg, \ + .get_user = get_id_reg, \ + .set_user = set_id_reg, \ + .visibility = raz_visibility, \ } /* -- cgit v1.2.3