Release 4.11 arch/arm/include/asm/kvm_mmu.h
/*
* Copyright (C) 2012 - Virtual Open Systems and Columbia University
* Author: Christoffer Dall <c.dall@virtualopensystems.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __ARM_KVM_MMU_H__
#define __ARM_KVM_MMU_H__
#include <asm/memory.h>
#include <asm/page.h>
/*
* We directly use the kernel VA for the HYP, as we can directly share
* the mapping (HTTBR "covers" TTBR1).
*/
#define kern_hyp_va(kva) (kva)
/*
* KVM_MMU_CACHE_MIN_PAGES is the number of stage2 page table translation levels.
*/
#define KVM_MMU_CACHE_MIN_PAGES 2
#ifndef __ASSEMBLY__
#include <linux/highmem.h>
#include <asm/cacheflush.h>
#include <asm/pgalloc.h>
#include <asm/stage2_pgtable.h>
int create_hyp_mappings(void *from, void *to, pgprot_t prot);
int create_hyp_io_mappings(void *from, void *to, phys_addr_t);
void free_hyp_pgds(void);
void stage2_unmap_vm(struct kvm *kvm);
int kvm_alloc_stage2_pgd(struct kvm *kvm);
void kvm_free_stage2_pgd(struct kvm *kvm);
int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa,
phys_addr_t pa, unsigned long size, bool writable);
int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run);
void kvm_mmu_free_memory_caches(struct kvm_vcpu *vcpu);
phys_addr_t kvm_mmu_get_httbr(void);
phys_addr_t kvm_get_idmap_vector(void);
phys_addr_t kvm_get_idmap_start(void);
int kvm_mmu_init(void);
void kvm_clear_hyp_idmap(void);
static inline void kvm_set_pmd(pmd_t *pmd, pmd_t new_pmd)
{
*pmd = new_pmd;
dsb(ishst);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Christoffer Dall | 22 | 91.67% | 1 | 50.00% |
| Mark Rutland | 2 | 8.33% | 1 | 50.00% |
| Total | 24 | 100.00% | 2 | 100.00% |
static inline void kvm_set_pte(pte_t *pte, pte_t new_pte)
{
*pte = new_pte;
dsb(ishst);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Marc Zyngier | 22 | 91.67% | 1 | 50.00% |
| Mark Rutland | 2 | 8.33% | 1 | 50.00% |
| Total | 24 | 100.00% | 2 | 100.00% |
static inline pte_t kvm_s2pte_mkwrite(pte_t pte)
{
pte_val(pte) |= L_PTE_S2_RDWR;
return pte;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Marc Zyngier | 15 | 75.00% | 1 | 50.00% |
| Catalin Marinas | 5 | 25.00% | 1 | 50.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
static inline pmd_t kvm_s2pmd_mkwrite(pmd_t pmd)
{
pmd_val(pmd) |= L_PMD_S2_RDWR;
return pmd;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Christoffer Dall | 15 | 75.00% | 1 | 50.00% |
| Catalin Marinas | 5 | 25.00% | 1 | 50.00% |
| Total | 20 | 100.00% | 2 | 100.00% |
static inline void kvm_set_s2pte_readonly(pte_t *pte)
{
pte_val(*pte) = (pte_val(*pte) & ~L_PTE_S2_RDWR) | L_PTE_S2_RDONLY;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Mario Smarduch | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
static inline bool kvm_s2pte_readonly(pte_t *pte)
{
return (pte_val(*pte) & L_PTE_S2_RDWR) == L_PTE_S2_RDONLY;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Mario Smarduch | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static inline void kvm_set_s2pmd_readonly(pmd_t *pmd)
{
pmd_val(*pmd) = (pmd_val(*pmd) & ~L_PMD_S2_RDWR) | L_PMD_S2_RDONLY;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mario Smarduch | 30 | 100.00% | 1 | 100.00% |
| Total | 30 | 100.00% | 1 | 100.00% |
static inline bool kvm_s2pmd_readonly(pmd_t *pmd)
{
return (pmd_val(*pmd) & L_PMD_S2_RDWR) == L_PMD_S2_RDONLY;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mario Smarduch | 24 | 100.00% | 1 | 100.00% |
| Total | 24 | 100.00% | 1 | 100.00% |
static inline bool kvm_page_empty(void *ptr)
{
struct page *ptr_page = virt_to_page(ptr);
return page_count(ptr_page) == 1;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Christoffer Dall | 29 | 100.00% | 1 | 100.00% |
| Total | 29 | 100.00% | 1 | 100.00% |
#define kvm_pte_table_empty(kvm, ptep) kvm_page_empty(ptep)
#define kvm_pmd_table_empty(kvm, pmdp) kvm_page_empty(pmdp)
#define kvm_pud_table_empty(kvm, pudp) false
#define hyp_pte_table_empty(ptep) kvm_page_empty(ptep)
#define hyp_pmd_table_empty(pmdp) kvm_page_empty(pmdp)
#define hyp_pud_table_empty(pudp) false
struct kvm;
#define kvm_flush_dcache_to_poc(a,l) __cpuc_flush_dcache_area((a), (l))
static inline bool vcpu_has_cache_enabled(struct kvm_vcpu *vcpu)
{
return (vcpu_cp15(vcpu, c1_SCTLR) & 0b101) == 0b101;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Marc Zyngier | 26 | 100.00% | 2 | 100.00% |
| Total | 26 | 100.00% | 2 | 100.00% |
static inline void __coherent_cache_guest_page(struct kvm_vcpu *vcpu,
kvm_pfn_t pfn,
unsigned long size)
{
/*
* If we are going to insert an instruction page and the icache is
* either VIPT or PIPT, there is a potential problem where the host
* (or another VM) may have used the same page as this guest, and we
* read incorrect data from the icache. If we're using a PIPT cache,
* we can invalidate just that page, but if we are using a VIPT cache
* we need to invalidate the entire icache - damn shame - as written
* in the ARM ARM (DDI 0406C.b - Page B3-1393).
*
* VIVT caches are tagged using both the ASID and the VMID and doesn't
* need any kind of flushing (DDI 0406C.b - Page B3-1392).
*
* We need to do this through a kernel mapping (using the
* user-space mapping has proved to be the wrong
* solution). For that, we need to kmap one page at a time,
* and iterate over the range.
*/
VM_BUG_ON(size & ~PAGE_MASK);
while (size) {
void *va = kmap_atomic_pfn(pfn);
kvm_flush_dcache_to_poc(va, PAGE_SIZE);
if (icache_is_pipt())
__cpuc_coherent_user_range((unsigned long)va,
(unsigned long)va + PAGE_SIZE);
size -= PAGE_SIZE;
pfn++;
kunmap_atomic(va);
}
if (!icache_is_pipt() && !icache_is_vivt_asid_tagged()) {
/* any kind of VIPT cache */
__flush_icache_all();
}
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Marc Zyngier | 93 | 93.00% | 4 | 57.14% |
| Christoffer Dall | 5 | 5.00% | 1 | 14.29% |
| Jan Kiszka | 1 | 1.00% | 1 | 14.29% |
| Dan J Williams | 1 | 1.00% | 1 | 14.29% |
| Total | 100 | 100.00% | 7 | 100.00% |
static inline void __kvm_flush_dcache_pte(pte_t pte)
{
void *va = kmap_atomic(pte_page(pte));
kvm_flush_dcache_to_poc(va, PAGE_SIZE);
kunmap_atomic(va);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Marc Zyngier | 34 | 100.00% | 1 | 100.00% |
| Total | 34 | 100.00% | 1 | 100.00% |
static inline void __kvm_flush_dcache_pmd(pmd_t pmd)
{
unsigned long size = PMD_SIZE;
kvm_pfn_t pfn = pmd_pfn(pmd);
while (size) {
void *va = kmap_atomic_pfn(pfn);
kvm_flush_dcache_to_poc(va, PAGE_SIZE);
pfn++;
size -= PAGE_SIZE;
kunmap_atomic(va);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Marc Zyngier | 57 | 98.28% | 1 | 50.00% |
| Dan J Williams | 1 | 1.72% | 1 | 50.00% |
| Total | 58 | 100.00% | 2 | 100.00% |
static inline void __kvm_flush_dcache_pud(pud_t pud)
{
}
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| Person | Tokens | Prop | Commits | CommitProp |
| Marc Zyngier | 9 | 100.00% | 1 | 100.00% |
| Total | 9 | 100.00% | 1 | 100.00% |
#define kvm_virt_to_phys(x) virt_to_idmap((unsigned long)(x))
void kvm_set_way_flush(struct kvm_vcpu *vcpu);
void kvm_toggle_cache(struct kvm_vcpu *vcpu, bool was_enabled);
static inline bool __kvm_cpu_uses_extended_idmap(void)
{
return false;
}
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| Ard Biesheuvel | 12 | 100.00% | 1 | 100.00% |
| Total | 12 | 100.00% | 1 | 100.00% |
static inline void __kvm_extend_hypmap(pgd_t *boot_hyp_pgd,
pgd_t *hyp_pgd,
pgd_t *merged_hyp_pgd,
unsigned long hyp_idmap_start) { }
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| Ard Biesheuvel | 22 | 100.00% | 1 | 100.00% |
| Total | 22 | 100.00% | 1 | 100.00% |
static inline unsigned int kvm_get_vmid_bits(void)
{
return 8;
}
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| Vladimir Murzin | 13 | 100.00% | 1 | 100.00% |
| Total | 13 | 100.00% | 1 | 100.00% |
#endif /* !__ASSEMBLY__ */
#endif /* __ARM_KVM_MMU_H__ */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Marc Zyngier | 328 | 42.54% | 13 | 41.94% |
| Christoffer Dall | 236 | 30.61% | 6 | 19.35% |
| Mario Smarduch | 108 | 14.01% | 1 | 3.23% |
| Ard Biesheuvel | 37 | 4.80% | 2 | 6.45% |
| Suzuki K. Poulose | 19 | 2.46% | 2 | 6.45% |
| Vladimir Murzin | 13 | 1.69% | 1 | 3.23% |
| Catalin Marinas | 10 | 1.30% | 1 | 3.23% |
| Santosh Shilimkar | 7 | 0.91% | 1 | 3.23% |
| AKASHI Takahiro | 6 | 0.78% | 1 | 3.23% |
| Mark Rutland | 4 | 0.52% | 1 | 3.23% |
| Dan J Williams | 2 | 0.26% | 1 | 3.23% |
| Jan Kiszka | 1 | 0.13% | 1 | 3.23% |
| Total | 771 | 100.00% | 31 | 100.00% |
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