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| author | Peter Xu <peterx@redhat.com> | 2022-10-11 15:58:07 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-11-09 12:31:27 -0500 |
| commit | fe5ed56c79733b7808f968567c581118ab79552e (patch) | |
| tree | 060f398e31e0aa431b99391ec42fbed34f7aa841 | |
| parent | 93c5c61d9e58a9ea423439d358c198be5b674a58 (diff) | |
| download | lwn-fe5ed56c79733b7808f968567c581118ab79552e.tar.gz lwn-fe5ed56c79733b7808f968567c581118ab79552e.zip | |
kvm: Add KVM_PFN_ERR_SIGPENDING
Add a new pfn error to show that we've got a pending signal to handle
during hva_to_pfn_slow() procedure (of -EINTR retval).
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221011195809.557016-3-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | include/linux/kvm_host.h | 10 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 2 |
2 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 18592bdf4c1b..911b064878df 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -96,6 +96,7 @@ #define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK) #define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1) #define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 2) +#define KVM_PFN_ERR_SIGPENDING (KVM_PFN_ERR_MASK + 3) /* * error pfns indicate that the gfn is in slot but faild to @@ -107,6 +108,15 @@ static inline bool is_error_pfn(kvm_pfn_t pfn) } /* + * KVM_PFN_ERR_SIGPENDING indicates that fetching the PFN was interrupted + * by a pending signal. Note, the signal may or may not be fatal. + */ +static inline bool is_sigpending_pfn(kvm_pfn_t pfn) +{ + return pfn == KVM_PFN_ERR_SIGPENDING; +} + +/* * error_noslot pfns indicate that the gfn can not be * translated to pfn - it is not in slot or failed to * translate it to pfn. diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 25d7872b29c1..558f52dbebbd 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -2667,6 +2667,8 @@ kvm_pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async, npages = hva_to_pfn_slow(addr, async, write_fault, writable, &pfn); if (npages == 1) return pfn; + if (npages == -EINTR) + return KVM_PFN_ERR_SIGPENDING; mmap_read_lock(current->mm); if (npages == -EHWPOISON || |