On Mon, Apr 04, 2016 at 05:26:16PM +0100, Suzuki K Poulose wrote:
> Now that we don't have any fake page table levels for arm64,
> cleanup the common code to get rid of the dead code.
>
> Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
> Cc: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
> ---
> arch/arm/include/asm/kvm_mmu.h | 19 -------------------
> arch/arm/kvm/arm.c | 2 +-
> arch/arm/kvm/mmu.c | 25 ++++++++-----------------
> arch/arm64/include/asm/kvm_mmu.h | 18 ------------------
> 4 files changed, 9 insertions(+), 55 deletions(-)
>
> diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h
> index 50aa901..f8b7920 100644
> --- a/arch/arm/include/asm/kvm_mmu.h
> +++ b/arch/arm/include/asm/kvm_mmu.h
> @@ -146,25 +146,6 @@ static inline bool kvm_page_empty(void *ptr)
> #define hyp_pmd_table_empty(pmdp) kvm_page_empty(pmdp)
> #define hyp_pud_table_empty(pudp) (0)
>
> -static inline void *kvm_get_hwpgd(struct kvm *kvm)
> -{
> - return kvm->arch.pgd;
> -}
> -
> -static inline unsigned int kvm_get_hwpgd_size(void)
> -{
> - return PTRS_PER_S2_PGD * sizeof(pgd_t);
> -}
> -
> -static inline pgd_t *kvm_setup_fake_pgd(pgd_t *hwpgd)
> -{
> - return hwpgd;
> -}
> -
> -static inline void kvm_free_fake_pgd(pgd_t *pgd)
> -{
> -}
> -
> struct kvm;
>
> #define kvm_flush_dcache_to_poc(a,l) __cpuc_flush_dcache_area((a), (l))
> diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
> index 6accd66..dfd4987 100644
> --- a/arch/arm/kvm/arm.c
> +++ b/arch/arm/kvm/arm.c
> @@ -448,7 +448,7 @@ static void update_vttbr(struct kvm *kvm)
> kvm_next_vmid &= (1 << kvm_vmid_bits) - 1;
>
> /* update vttbr to be used with the new vmid */
> - pgd_phys = virt_to_phys(kvm_get_hwpgd(kvm));
> + pgd_phys = virt_to_phys(kvm->arch.pgd);
> BUG_ON(pgd_phys & ~VTTBR_BADDR_MASK);
> vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK(kvm_vmid_bits);
> kvm->arch.vttbr = pgd_phys | vmid;
> diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
> index dda60fc..1cb7e60 100644
> --- a/arch/arm/kvm/mmu.c
> +++ b/arch/arm/kvm/mmu.c
> @@ -755,6 +755,11 @@ int create_hyp_io_mappings(void *from, void *to, phys_addr_t phys_addr)
> __phys_to_pfn(phys_addr), PAGE_HYP_DEVICE);
> }
>
> +static inline unsigned int kvm_get_hwpgd_size(void)
> +{
> + return PTRS_PER_S2_PGD * sizeof(pgd_t);
> +}
> +
> /* Free the HW pgd, one page at a time */
> static void kvm_free_hwpgd(void *hwpgd)
> {
> @@ -783,29 +788,16 @@ static void *kvm_alloc_hwpgd(void)
> int kvm_alloc_stage2_pgd(struct kvm *kvm)
> {
> pgd_t *pgd;
> - void *hwpgd;
>
> if (kvm->arch.pgd != NULL) {
> kvm_err("kvm_arch already initialized?\n");
> return -EINVAL;
> }
>
> - hwpgd = kvm_alloc_hwpgd();
> - if (!hwpgd)
> + pgd = kvm_alloc_hwpgd();
can you just inline kvm_alloc_hwpgd and kvm_get_hwpgd_size now?
> + if (!pgd)
> return -ENOMEM;
>
> - /*
> - * When the kernel uses more levels of page tables than the
> - * guest, we allocate a fake PGD and pre-populate it to point
> - * to the next-level page table, which will be the real
> - * initial page table pointed to by the VTTBR.
> - */
> - pgd = kvm_setup_fake_pgd(hwpgd);
> - if (IS_ERR(pgd)) {
> - kvm_free_hwpgd(hwpgd);
> - return PTR_ERR(pgd);
> - }
> -
> kvm_clean_pgd(pgd);
> kvm->arch.pgd = pgd;
> return 0;
> @@ -893,8 +885,7 @@ void kvm_free_stage2_pgd(struct kvm *kvm)
> return;
>
> unmap_stage2_range(kvm, 0, KVM_PHYS_SIZE);
> - kvm_free_hwpgd(kvm_get_hwpgd(kvm));
> - kvm_free_fake_pgd(kvm->arch.pgd);
> + kvm_free_hwpgd(kvm->arch.pgd);
> kvm->arch.pgd = NULL;
> }
>
> diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
> index e3fee0a..249c4fc 100644
> --- a/arch/arm64/include/asm/kvm_mmu.h
> +++ b/arch/arm64/include/asm/kvm_mmu.h
> @@ -141,24 +141,6 @@ static inline bool kvm_s2pmd_readonly(pmd_t *pmd)
> return (pmd_val(*pmd) & PMD_S2_RDWR) == PMD_S2_RDONLY;
> }
>
> -static inline void *kvm_get_hwpgd(struct kvm *kvm)
> -{
> - return kvm->arch.pgd;
> -}
> -
> -static inline unsigned int kvm_get_hwpgd_size(void)
> -{
> - return PTRS_PER_S2_PGD * sizeof(pgd_t);
> -}
> -
> -static inline pgd_t *kvm_setup_fake_pgd(pgd_t *hwpgd)
> -{
> - return hwpgd;
> -}
> -
> -static inline void kvm_free_fake_pgd(pgd_t *pgd)
> -{
> -}
> static inline bool kvm_page_empty(void *ptr)
> {
> struct page *ptr_page = virt_to_page(ptr);
> --
> 1.7.9.5
>
otherwise:
Acked-by: Christoffer Dall <christoffer.dall@xxxxxxxxxx>
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