| Message ID | 20210728142631.41860-14-imbrenda@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | KVM: s390: pv: implement lazy destroy | expand |
On 7/28/21 4:26 PM, Claudio Imbrenda wrote: > Add support for Ultravisor feature bits, and take advantage of the > functionality advertised to speed up the lazy destroy mechanism. UV feature bit support is already merged please fix the description and subject. > > Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> > --- > arch/s390/kernel/uv.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c > index f0af49b09a91..6ec3d7338ec8 100644 > --- a/arch/s390/kernel/uv.c > +++ b/arch/s390/kernel/uv.c > @@ -290,7 +290,8 @@ static int make_secure_pte(pte_t *ptep, unsigned long addr, > > static bool should_export_before_import(struct uv_cb_header *uvcb, struct mm_struct *mm) > { > - return uvcb->cmd != UVC_CMD_UNPIN_PAGE_SHARED && > + return !test_bit_inv(BIT_UV_FEAT_MISC, &uv_info.uv_feature_indications) && > + uvcb->cmd != UVC_CMD_UNPIN_PAGE_SHARED && > atomic_read(&mm->context.is_protected) > 1; > } > >
On Thu, 29 Jul 2021 11:52:58 +0200 Janosch Frank <frankja@linux.ibm.com> wrote: > On 7/28/21 4:26 PM, Claudio Imbrenda wrote: > > Add support for Ultravisor feature bits, and take advantage of the > > functionality advertised to speed up the lazy destroy mechanism. > > UV feature bit support is already merged please fix the description > and subject. oops, will be fixed > > > > Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> > > --- > > arch/s390/kernel/uv.c | 3 ++- > > 1 file changed, 2 insertions(+), 1 deletion(-) > > > > diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c > > index f0af49b09a91..6ec3d7338ec8 100644 > > --- a/arch/s390/kernel/uv.c > > +++ b/arch/s390/kernel/uv.c > > @@ -290,7 +290,8 @@ static int make_secure_pte(pte_t *ptep, > > unsigned long addr, > > static bool should_export_before_import(struct uv_cb_header *uvcb, > > struct mm_struct *mm) { > > - return uvcb->cmd != UVC_CMD_UNPIN_PAGE_SHARED && > > + return !test_bit_inv(BIT_UV_FEAT_MISC, > > &uv_info.uv_feature_indications) && > > + uvcb->cmd != UVC_CMD_UNPIN_PAGE_SHARED && > > atomic_read(&mm->context.is_protected) > 1; > > } > > > > >
diff --git a/arch/s390/kernel/uv.c b/arch/s390/kernel/uv.c index f0af49b09a91..6ec3d7338ec8 100644 --- a/arch/s390/kernel/uv.c +++ b/arch/s390/kernel/uv.c @@ -290,7 +290,8 @@ static int make_secure_pte(pte_t *ptep, unsigned long addr, static bool should_export_before_import(struct uv_cb_header *uvcb, struct mm_struct *mm) { - return uvcb->cmd != UVC_CMD_UNPIN_PAGE_SHARED && + return !test_bit_inv(BIT_UV_FEAT_MISC, &uv_info.uv_feature_indications) && + uvcb->cmd != UVC_CMD_UNPIN_PAGE_SHARED && atomic_read(&mm->context.is_protected) > 1; }
Add support for Ultravisor feature bits, and take advantage of the functionality advertised to speed up the lazy destroy mechanism. Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com> --- arch/s390/kernel/uv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)