From fe5ed56c79733b7808f968567c581118ab79552e Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Tue, 11 Oct 2022 15:58:07 -0400 Subject: 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 Reviewed-by: Sean Christopherson Message-Id: <20221011195809.557016-3-peterx@redhat.com> Signed-off-by: Paolo Bonzini --- include/linux/kvm_host.h | 10 ++++++++++ virt/kvm/kvm_main.c | 2 ++ 2 files changed, 12 insertions(+) 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 @@ -106,6 +107,15 @@ static inline bool is_error_pfn(kvm_pfn_t pfn) return !!(pfn & KVM_PFN_ERR_MASK); } +/* + * 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 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 || -- cgit v1.2.3