[RFC PATCH v2 14/26] KVM: arm64: Factor out vector address calculation
From: Quentin Perret <hidden>
Date: 2021-01-08 12:18:35
Also in:
kvmarm, linux-arm-kernel, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
In order to re-map the guest vectors at EL2 when pKVM is enabled, refactor __kvm_vector_slot2idx() and kvm_init_vector_slot() to move all the address calculation logic in a static inline function. Signed-off-by: Quentin Perret <redacted> --- arch/arm64/include/asm/kvm_mmu.h | 8 ++++++++ arch/arm64/kvm/arm.c | 9 +-------- 2 files changed, 9 insertions(+), 8 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index e52d82aeadca..d7ebd73ec86f 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h@@ -195,6 +195,14 @@ phys_addr_t kvm_mmu_get_httbr(void); phys_addr_t kvm_get_idmap_vector(void); int kvm_mmu_init(void); +static inline void *__kvm_vector_slot2addr(void *base, + enum arm64_hyp_spectre_vector slot) +{ + int idx = slot - (slot != HYP_VECTOR_DIRECT); + + return base + (idx * SZ_2K); +} + struct kvm; #define kvm_flush_dcache_to_poc(a,l) __flush_dcache_area((a), (l))
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index 9fd769349e9e..6af9204bcd5b 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c@@ -1346,16 +1346,9 @@ static unsigned long nvhe_percpu_order(void) /* A lookup table holding the hypervisor VA for each vector slot */ static void *hyp_spectre_vector_selector[BP_HARDEN_EL2_SLOTS]; -static int __kvm_vector_slot2idx(enum arm64_hyp_spectre_vector slot) -{ - return slot - (slot != HYP_VECTOR_DIRECT); -} - static void kvm_init_vector_slot(void *base, enum arm64_hyp_spectre_vector slot) { - int idx = __kvm_vector_slot2idx(slot); - - hyp_spectre_vector_selector[slot] = base + (idx * SZ_2K); + hyp_spectre_vector_selector[slot] = __kvm_vector_slot2addr(base, slot); } static int kvm_init_vector_slots(void)
--
2.30.0.284.gd98b1dd5eaa7-goog