summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kvm/book3s_hv_rmhandlers.S
diff options
context:
space:
mode:
authorPaul Mackerras <paulus@samba.org>2015-06-24 21:18:07 +1000
committerAlexander Graf <agraf@suse.de>2015-08-22 11:16:18 +0200
commitcdeee51842b55acb3e699a4083fa97e82384e456 (patch)
treef5ec12826f278325f24fa4f51ada03524e142397 /arch/powerpc/kvm/book3s_hv_rmhandlers.S
parent08fe1e7bd216339501c4eb0d0df0f413d715327a (diff)
downloadblackbird-op-linux-cdeee51842b55acb3e699a4083fa97e82384e456.tar.gz
blackbird-op-linux-cdeee51842b55acb3e699a4083fa97e82384e456.zip
KVM: PPC: Book3S HV: Implement H_CLEAR_REF and H_CLEAR_MOD
This adds implementations for the H_CLEAR_REF (test and clear reference bit) and H_CLEAR_MOD (test and clear changed bit) hypercalls. When clearing the reference or change bit in the guest view of the HPTE, we also have to clear it in the real HPTE so that we can detect future references or changes. When we do so, we transfer the R or C bit value to the rmap entry for the underlying host page so that kvm_age_hva_hv(), kvm_test_age_hva_hv() and kvmppc_hv_get_dirty_log() know that the page has been referenced and/or changed. These hypercalls are not used by Linux guests. These implementations have been tested using a FreeBSD guest. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_rmhandlers.S')
-rw-r--r--arch/powerpc/kvm/book3s_hv_rmhandlers.S4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
index db2427db4471..e3477667d498 100644
--- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S
+++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S
@@ -1904,8 +1904,8 @@ hcall_real_table:
.long DOTSYM(kvmppc_h_remove) - hcall_real_table
.long DOTSYM(kvmppc_h_enter) - hcall_real_table
.long DOTSYM(kvmppc_h_read) - hcall_real_table
- .long 0 /* 0x10 - H_CLEAR_MOD */
- .long 0 /* 0x14 - H_CLEAR_REF */
+ .long DOTSYM(kvmppc_h_clear_mod) - hcall_real_table
+ .long DOTSYM(kvmppc_h_clear_ref) - hcall_real_table
.long DOTSYM(kvmppc_h_protect) - hcall_real_table
.long DOTSYM(kvmppc_h_get_tce) - hcall_real_table
.long DOTSYM(kvmppc_h_put_tce) - hcall_real_table
OpenPOWER on IntegriCloud