From: Andrew Cooper <andrew.cooper3@citrix.com>
To: xen-devel@lists.xenproject.org
Subject: Re: [PATCH v6] x86/altp2m: Aggregate get entry and populate into common funcs
Date: Tue, 30 Apr 2019 11:22:54 +0100 [thread overview]
Message-ID: <174059b3-bf69-23e7-b5c4-7e7ef5ca27ec@citrix.com> (raw)
In-Reply-To: <5CC70FF7020000780022A0EF@prv1-mh.provo.novell.com>
On 29/04/2019 15:53, Jan Beulich wrote:
>>>> On 23.04.19 at 16:30, <aisaila@bitdefender.com> wrote:
>> --- a/xen/arch/x86/mm/p2m.c
>> +++ b/xen/arch/x86/mm/p2m.c
>> @@ -478,6 +478,43 @@ void p2m_unlock_and_tlb_flush(struct p2m_domain *p2m)
>> mm_write_unlock(&p2m->lock);
>> }
>>
>> +int altp2m_get_effective_entry(struct p2m_domain *ap2m, gfn_t gfn, mfn_t *mfn,
>> + p2m_type_t *t, p2m_access_t *a,
>> + bool prepopulate)
>> +{
>> + *mfn = ap2m->get_entry(ap2m, gfn, t, a, 0, NULL, NULL);
>> +
>> + /* Check host p2m if no valid entry in alternate */
>> + if ( !mfn_valid(*mfn) && !p2m_is_hostp2m(ap2m) )
>> + {
>> + struct p2m_domain *hp2m = p2m_get_hostp2m(ap2m->domain);
>> + unsigned int page_order;
>> + int rc;
>> +
>> + *mfn = __get_gfn_type_access(hp2m, gfn_x(gfn), t, a,
>> + P2M_ALLOC | P2M_UNSHARE, &page_order, 0);
>> +
>> + rc = -ESRCH;
>> + if ( !mfn_valid(*mfn) || *t != p2m_ram_rw )
>> + return rc;
>> +
>> + /* If this is a superpage, copy that first */
>> + if ( prepopulate && page_order != PAGE_ORDER_4K )
>> + {
>> + unsigned long mask = ~((1UL << page_order) - 1);
>> + gfn_t gfn_aligned = _gfn(gfn_x(gfn) & mask);
>> + mfn_t mfn_aligned = _mfn(mfn_x(*mfn) & mask);
>> +
>> + rc = ap2m->set_entry(ap2m, gfn_aligned, mfn_aligned, page_order, *t, *a, 1);
>> + if ( rc )
>> + return rc;
>> + }
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +
>> mfn_t __get_gfn_type_access(struct p2m_domain *p2m, unsigned long gfn_l,
>> p2m_type_t *t, p2m_access_t *a, p2m_query_t q,
>> unsigned int *page_order, bool_t locked)
> Can you please avoid introducing double blank lines like this?
> (Easy enough to take care of while committing, of course.)
Pulled into x86-next with this adjustment taken care of.
~Andrew
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WARNING: multiple messages have this Message-ID (diff)
From: Andrew Cooper <andrew.cooper3@citrix.com>
To: <xen-devel@lists.xenproject.org>
Subject: Re: [Xen-devel] [PATCH v6] x86/altp2m: Aggregate get entry and populate into common funcs
Date: Tue, 30 Apr 2019 11:22:54 +0100 [thread overview]
Message-ID: <174059b3-bf69-23e7-b5c4-7e7ef5ca27ec@citrix.com> (raw)
Message-ID: <20190430102254.Gs6ME5jXvsSl0EHvk-kTA4l6gIAqTPcyPhj_IHszEro@z> (raw)
In-Reply-To: <5CC70FF7020000780022A0EF@prv1-mh.provo.novell.com>
On 29/04/2019 15:53, Jan Beulich wrote:
>>>> On 23.04.19 at 16:30, <aisaila@bitdefender.com> wrote:
>> --- a/xen/arch/x86/mm/p2m.c
>> +++ b/xen/arch/x86/mm/p2m.c
>> @@ -478,6 +478,43 @@ void p2m_unlock_and_tlb_flush(struct p2m_domain *p2m)
>> mm_write_unlock(&p2m->lock);
>> }
>>
>> +int altp2m_get_effective_entry(struct p2m_domain *ap2m, gfn_t gfn, mfn_t *mfn,
>> + p2m_type_t *t, p2m_access_t *a,
>> + bool prepopulate)
>> +{
>> + *mfn = ap2m->get_entry(ap2m, gfn, t, a, 0, NULL, NULL);
>> +
>> + /* Check host p2m if no valid entry in alternate */
>> + if ( !mfn_valid(*mfn) && !p2m_is_hostp2m(ap2m) )
>> + {
>> + struct p2m_domain *hp2m = p2m_get_hostp2m(ap2m->domain);
>> + unsigned int page_order;
>> + int rc;
>> +
>> + *mfn = __get_gfn_type_access(hp2m, gfn_x(gfn), t, a,
>> + P2M_ALLOC | P2M_UNSHARE, &page_order, 0);
>> +
>> + rc = -ESRCH;
>> + if ( !mfn_valid(*mfn) || *t != p2m_ram_rw )
>> + return rc;
>> +
>> + /* If this is a superpage, copy that first */
>> + if ( prepopulate && page_order != PAGE_ORDER_4K )
>> + {
>> + unsigned long mask = ~((1UL << page_order) - 1);
>> + gfn_t gfn_aligned = _gfn(gfn_x(gfn) & mask);
>> + mfn_t mfn_aligned = _mfn(mfn_x(*mfn) & mask);
>> +
>> + rc = ap2m->set_entry(ap2m, gfn_aligned, mfn_aligned, page_order, *t, *a, 1);
>> + if ( rc )
>> + return rc;
>> + }
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +
>> mfn_t __get_gfn_type_access(struct p2m_domain *p2m, unsigned long gfn_l,
>> p2m_type_t *t, p2m_access_t *a, p2m_query_t q,
>> unsigned int *page_order, bool_t locked)
> Can you please avoid introducing double blank lines like this?
> (Easy enough to take care of while committing, of course.)
Pulled into x86-next with this adjustment taken care of.
~Andrew
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
next prev parent reply other threads:[~2019-04-30 10:22 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-23 14:30 [PATCH v6] x86/altp2m: Aggregate get entry and populate into common funcs Alexandru Stefan ISAILA
2019-04-23 14:30 ` [Xen-devel] " Alexandru Stefan ISAILA
2019-04-23 18:15 ` Tamas K Lengyel
2019-04-23 18:15 ` [Xen-devel] " Tamas K Lengyel
2019-04-29 14:53 ` Jan Beulich
2019-04-29 14:53 ` [Xen-devel] " Jan Beulich
2019-04-30 10:22 ` Andrew Cooper [this message]
2019-04-30 10:22 ` Andrew Cooper
2019-05-14 15:42 ` Jan Beulich
2019-05-14 15:42 ` [Xen-devel] " Jan Beulich
2019-05-14 16:16 ` Razvan Cojocaru
2019-05-14 16:16 ` [Xen-devel] " Razvan Cojocaru
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