KVM already has a 'GPA_INVALID' defined as (~(gpa_t)0) in kvm_types.h, and it is used by ARM and X86 xen code. We do not need a specific definition of 'INVALID_GPA' for X86. Instead of using the common 'GPA_INVALID' for X86, replace the definition of 'GPA_INVALID' with 'INVALID_GPA', and change the users of 'GPA_INVALID', so that the diff can be smaller. Also because the name 'INVALID_GPA' tells the user we are using an invalid GPA, while the name 'GPA_INVALID' is emphasizing the GPA is an invalid one. Also, add definition of 'INVALID_GFN' because it is more proper than 'INVALID_GPA' for GFN variables. Tested by rebuilding KVM for x86 and for ARM64. No functional change intended. Signed-off-by: Yu Zhang <yu.c.zhang@xxxxxxxxxxxxxxx> Reviewed-by: Paul Durrant <paul@xxxxxxx> --- V3: Followed David and Sean's comment to add 'INVALID_GFN'. Also, changed the commit message. v2: Followed Sean's comments to rename GPA_INVALID to INVALID_GPA and modify _those_ users. Also, changed the commit message. v1: https://lore.kernel.org/lkml/20221209023622.274715-1-yu.c.zhang@xxxxxxxxxxxxxxx/ --- arch/arm64/include/asm/kvm_host.h | 4 ++-- arch/arm64/kvm/hypercalls.c | 2 +- arch/arm64/kvm/pvtime.c | 8 ++++---- arch/x86/include/asm/kvm_host.h | 2 -- arch/x86/kvm/xen.c | 14 +++++++------- include/linux/kvm_types.h | 3 ++- 6 files changed, 16 insertions(+), 17 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 001c8abe87fc..fcf96e9cc8cd 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -906,12 +906,12 @@ void kvm_arm_vmid_clear_active(void); static inline void kvm_arm_pvtime_vcpu_init(struct kvm_vcpu_arch *vcpu_arch) { - vcpu_arch->steal.base = GPA_INVALID; + vcpu_arch->steal.base = INVALID_GPA; } static inline bool kvm_arm_is_pvtime_enabled(struct kvm_vcpu_arch *vcpu_arch) { - return (vcpu_arch->steal.base != GPA_INVALID); + return (vcpu_arch->steal.base != INVALID_GPA); } void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 syndrome); diff --git a/arch/arm64/kvm/hypercalls.c b/arch/arm64/kvm/hypercalls.c index c9f401fa01a9..64c086c02c60 100644 --- a/arch/arm64/kvm/hypercalls.c +++ b/arch/arm64/kvm/hypercalls.c @@ -198,7 +198,7 @@ int kvm_hvc_call_handler(struct kvm_vcpu *vcpu) break; case ARM_SMCCC_HV_PV_TIME_ST: gpa = kvm_init_stolen_time(vcpu); - if (gpa != GPA_INVALID) + if (gpa != INVALID_GPA) val[0] = gpa; break; case ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID: diff --git a/arch/arm64/kvm/pvtime.c b/arch/arm64/kvm/pvtime.c index 78a09f7a6637..4ceabaa4c30b 100644 --- a/arch/arm64/kvm/pvtime.c +++ b/arch/arm64/kvm/pvtime.c @@ -19,7 +19,7 @@ void kvm_update_stolen_time(struct kvm_vcpu *vcpu) u64 steal = 0; int idx; - if (base == GPA_INVALID) + if (base == INVALID_GPA) return; idx = srcu_read_lock(&kvm->srcu); @@ -40,7 +40,7 @@ long kvm_hypercall_pv_features(struct kvm_vcpu *vcpu) switch (feature) { case ARM_SMCCC_HV_PV_TIME_FEATURES: case ARM_SMCCC_HV_PV_TIME_ST: - if (vcpu->arch.steal.base != GPA_INVALID) + if (vcpu->arch.steal.base != INVALID_GPA) val = SMCCC_RET_SUCCESS; break; } @@ -54,7 +54,7 @@ gpa_t kvm_init_stolen_time(struct kvm_vcpu *vcpu) struct kvm *kvm = vcpu->kvm; u64 base = vcpu->arch.steal.base; - if (base == GPA_INVALID) + if (base == INVALID_GPA) return base; /* @@ -89,7 +89,7 @@ int kvm_arm_pvtime_set_attr(struct kvm_vcpu *vcpu, return -EFAULT; if (!IS_ALIGNED(ipa, 64)) return -EINVAL; - if (vcpu->arch.steal.base != GPA_INVALID) + if (vcpu->arch.steal.base != INVALID_GPA) return -EEXIST; /* Check the address is in a valid memslot */ diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index f35f1ff4427b..46e50cb6c9ca 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -134,8 +134,6 @@ #define INVALID_PAGE (~(hpa_t)0) #define VALID_PAGE(x) ((x) != INVALID_PAGE) -#define INVALID_GPA (~(gpa_t)0) - /* KVM Hugepage definitions for x86 */ #define KVM_MAX_HUGEPAGE_LEVEL PG_LEVEL_1G #define KVM_NR_PAGE_SIZES (KVM_MAX_HUGEPAGE_LEVEL - PG_LEVEL_4K + 1) diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c index d7af40240248..ec893276681c 100644 --- a/arch/x86/kvm/xen.c +++ b/arch/x86/kvm/xen.c @@ -41,7 +41,7 @@ static int kvm_xen_shared_info_init(struct kvm *kvm, gfn_t gfn) int ret = 0; int idx = srcu_read_lock(&kvm->srcu); - if (gfn == GPA_INVALID) { + if (gfn == INVALID_GFN) { kvm_gpc_deactivate(gpc); goto out; } @@ -659,7 +659,7 @@ int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data) if (kvm->arch.xen.shinfo_cache.active) data->u.shared_info.gfn = gpa_to_gfn(kvm->arch.xen.shinfo_cache.gpa); else - data->u.shared_info.gfn = GPA_INVALID; + data->u.shared_info.gfn = INVALID_GFN; r = 0; break; @@ -705,7 +705,7 @@ int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data) BUILD_BUG_ON(offsetof(struct vcpu_info, time) != offsetof(struct compat_vcpu_info, time)); - if (data->u.gpa == GPA_INVALID) { + if (data->u.gpa == INVALID_GPA) { kvm_gpc_deactivate(&vcpu->arch.xen.vcpu_info_cache); r = 0; break; @@ -719,7 +719,7 @@ int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data) break; case KVM_XEN_VCPU_ATTR_TYPE_VCPU_TIME_INFO: - if (data->u.gpa == GPA_INVALID) { + if (data->u.gpa == INVALID_GPA) { kvm_gpc_deactivate(&vcpu->arch.xen.vcpu_time_info_cache); r = 0; break; @@ -739,7 +739,7 @@ int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data) r = -EOPNOTSUPP; break; } - if (data->u.gpa == GPA_INVALID) { + if (data->u.gpa == INVALID_GPA) { r = 0; deactivate_out: kvm_gpc_deactivate(&vcpu->arch.xen.runstate_cache); @@ -937,7 +937,7 @@ int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data) if (vcpu->arch.xen.vcpu_info_cache.active) data->u.gpa = vcpu->arch.xen.vcpu_info_cache.gpa; else - data->u.gpa = GPA_INVALID; + data->u.gpa = INVALID_GPA; r = 0; break; @@ -945,7 +945,7 @@ int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data) if (vcpu->arch.xen.vcpu_time_info_cache.active) data->u.gpa = vcpu->arch.xen.vcpu_time_info_cache.gpa; else - data->u.gpa = GPA_INVALID; + data->u.gpa = INVALID_GPA; r = 0; break; diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h index 76de36e56cdf..b961043e664a 100644 --- a/include/linux/kvm_types.h +++ b/include/linux/kvm_types.h @@ -40,7 +40,8 @@ typedef unsigned long gva_t; typedef u64 gpa_t; typedef u64 gfn_t; -#define GPA_INVALID (~(gpa_t)0) +#define INVALID_GPA (~(gpa_t)0) +#define INVALID_GFN (~(gfn_t)0) typedef unsigned long hva_t; typedef u64 hpa_t; -- 2.25.1
