diff options
| author | Suraj Jitindar Singh <sjitindarsingh@gmail.com> | 2018-12-14 16:29:09 +1100 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2018-12-17 11:33:50 +1100 |
| commit | 6ff887b8bd0d820d9f3371c0ce093d96b73035d6 (patch) | |
| tree | 4bb68e2052a282e42a8eb6628a95bc70b5baba4c /arch/powerpc/kvm/book3s_64_mmu_radix.c | |
| parent | 873db2cd9a6d7f017d8f4c637cf4166c038c27d6 (diff) | |
KVM: PPC: Book3S: Introduce new hcall H_COPY_TOFROM_GUEST to access quadrants 1 & 2
A guest cannot access quadrants 1 or 2 as this would result in an
exception. Thus introduce the hcall H_COPY_TOFROM_GUEST to be used by a
guest when it wants to perform an access to quadrants 1 or 2, for
example when it wants to access memory for one of its nested guests.
Also provide an implementation for the kvm-hv module.
Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_mmu_radix.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_radix.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c index c3f85c1b60d6..5b3f266422d6 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c @@ -29,9 +29,9 @@ */ static int p9_supported_radix_bits[4] = { 5, 9, 9, 13 }; -static unsigned long __kvmhv_copy_tofrom_guest_radix(int lpid, int pid, - gva_t eaddr, void *to, void *from, - unsigned long n) +unsigned long __kvmhv_copy_tofrom_guest_radix(int lpid, int pid, + gva_t eaddr, void *to, void *from, + unsigned long n) { unsigned long quadrant, ret = n; int old_pid, old_lpid; @@ -82,6 +82,7 @@ static unsigned long __kvmhv_copy_tofrom_guest_radix(int lpid, int pid, return ret; } +EXPORT_SYMBOL_GPL(__kvmhv_copy_tofrom_guest_radix); static long kvmhv_copy_tofrom_guest_radix(struct kvm_vcpu *vcpu, gva_t eaddr, void *to, void *from, unsigned long n) |