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author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2017-07-27 09:24:53 +0300 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-17 16:13:46 +0300 |
commit | 94171b19c3f1f4d9d4c0e3aaa1aa161def1ec7ea (patch) | |
tree | 92f29a416e19671ac8fce9a84ed138c115396704 /arch/powerpc/kvm/e500_mmu_host.c | |
parent | 520eccdfe187591a51ea9ab4c1a024ae4d0f68d9 (diff) | |
download | linux-94171b19c3f1f4d9d4c0e3aaa1aa161def1ec7ea.tar.xz |
powerpc/mm: Rename find_linux_pte_or_hugepte()
Add newer helpers to make the function usage simpler. It is always
recommended to use find_current_mm_pte() for walking the page table.
If we cannot use find_current_mm_pte(), it should be documented why
the said usage of __find_linux_pte() is safe against a parallel THP
split.
For now we have KVM code using __find_linux_pte(). This is because kvm
code ends up calling __find_linux_pte() in real mode with MSR_EE=0 but
with PACA soft_enabled = 1. We may want to fix that later and make
sure we keep the MSR_EE and PACA soft_enabled in sync. When we do that
we can switch kvm to use find_linux_pte().
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kvm/e500_mmu_host.c')
-rw-r--r-- | arch/powerpc/kvm/e500_mmu_host.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/e500_mmu_host.c b/arch/powerpc/kvm/e500_mmu_host.c index 77fd043b3ecc..c6c734424c70 100644 --- a/arch/powerpc/kvm/e500_mmu_host.c +++ b/arch/powerpc/kvm/e500_mmu_host.c @@ -30,6 +30,7 @@ #include <linux/vmalloc.h> #include <linux/hugetlb.h> #include <asm/kvm_ppc.h> +#include <asm/pte-walk.h> #include "e500.h" #include "timing.h" @@ -476,7 +477,7 @@ static inline int kvmppc_e500_shadow_map(struct kvmppc_vcpu_e500 *vcpu_e500, * can't run hence pfn won't change. */ local_irq_save(flags); - ptep = find_linux_pte_or_hugepte(pgdir, hva, NULL, NULL); + ptep = find_linux_pte(pgdir, hva, NULL, NULL); if (ptep) { pte_t pte = READ_ONCE(*ptep); |