From: Stefano Stabellini <sstabellini@kernel.org> To: Jan Beulich <JBeulich@suse.com> Cc: Andrew Cooper <andrew.cooper3@citrix.com>, Julien Grall <julien.grall@arm.com>, Stefano Stabellini <sstabellini@kernel.org>, Stefano Stabellini <stefanos@xilinx.com>, xen-devel <xen-devel@lists.xenproject.org> Subject: Re: [PATCH v2 01/10] xen: add a p2mt parameter to map_mmio_regions Date: Thu, 2 May 2019 11:49:31 -0700 (PDT) [thread overview] Message-ID: <alpine.DEB.2.10.1905021147240.1347@sstabellini-ThinkPad-X260> (raw) In-Reply-To: <5CCB05C6020000780022B567@prv1-mh.provo.novell.com> On Thu, 2 May 2019, Jan Beulich wrote: > >>> On 30.04.19 at 23:02, <sstabellini@kernel.org> wrote: > > --- a/xen/arch/x86/hvm/dom0_build.c > > +++ b/xen/arch/x86/hvm/dom0_build.c > > @@ -79,8 +79,11 @@ static int __init modify_identity_mmio(struct domain *d, unsigned long pfn, > > > > for ( ; ; ) > > { > > - rc = map ? map_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn)) > > - : unmap_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn)); > > + if ( map ) > > + rc = map_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn), > > + p2m_mmio_direct); > > + else > > + rc = unmap_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn)); > > May I ask that you leave alone the use of the conditional > operator here, and _just_ add the new argument? Yes, I can do that. This change is due to the way it was done in the previous version of the series, it doesn't make sense anymore. > > --- a/xen/arch/x86/mm/p2m.c > > +++ b/xen/arch/x86/mm/p2m.c > > @@ -2264,12 +2264,16 @@ static unsigned int mmio_order(const struct domain *d, > > int map_mmio_regions(struct domain *d, > > gfn_t start_gfn, > > unsigned long nr, > > - mfn_t mfn) > > + mfn_t mfn, > > + p2m_type_t p2mt) > > { > > int ret = 0; > > unsigned long i; > > unsigned int iter, order; > > > > + if ( p2mt != p2m_mmio_direct ) > > + return -EOPNOTSUPP; > > Considering this and ... > > > --- a/xen/common/domctl.c > > +++ b/xen/common/domctl.c > > @@ -927,6 +927,7 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) > > unsigned long nr_mfns = op->u.memory_mapping.nr_mfns; > > unsigned long mfn_end = mfn + nr_mfns - 1; > > int add = op->u.memory_mapping.add_mapping; > > + p2m_type_t p2mt; > > > > ret = -EINVAL; > > if ( mfn_end < mfn || /* wrap? */ > > @@ -939,6 +940,10 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) > > /* Must break hypercall up as this could take a while. */ > > if ( nr_mfns > 64 ) > > break; > > + > > + p2mt = p2m_mmio_direct_dev; > > +#else > > + p2mt = p2m_mmio_direct; > > #endif > > ... this, is there really value in adding the new parameter for > x86? A wrapper macro of the same name could be used to > strip the new last argument at all call sites (current and future > ones). Sure, no problem. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
WARNING: multiple messages have this Message-ID (diff)
From: Stefano Stabellini <sstabellini@kernel.org> To: Jan Beulich <JBeulich@suse.com> Cc: Andrew Cooper <andrew.cooper3@citrix.com>, Julien Grall <julien.grall@arm.com>, Stefano Stabellini <sstabellini@kernel.org>, Stefano Stabellini <stefanos@xilinx.com>, xen-devel <xen-devel@lists.xenproject.org> Subject: Re: [Xen-devel] [PATCH v2 01/10] xen: add a p2mt parameter to map_mmio_regions Date: Thu, 2 May 2019 11:49:31 -0700 (PDT) [thread overview] Message-ID: <alpine.DEB.2.10.1905021147240.1347@sstabellini-ThinkPad-X260> (raw) Message-ID: <20190502184931.BZQv0nwm_zZEd7PNpPS6sTdsFEbKiXxFh9D-3bpJtuo@z> (raw) In-Reply-To: <5CCB05C6020000780022B567@prv1-mh.provo.novell.com> On Thu, 2 May 2019, Jan Beulich wrote: > >>> On 30.04.19 at 23:02, <sstabellini@kernel.org> wrote: > > --- a/xen/arch/x86/hvm/dom0_build.c > > +++ b/xen/arch/x86/hvm/dom0_build.c > > @@ -79,8 +79,11 @@ static int __init modify_identity_mmio(struct domain *d, unsigned long pfn, > > > > for ( ; ; ) > > { > > - rc = map ? map_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn)) > > - : unmap_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn)); > > + if ( map ) > > + rc = map_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn), > > + p2m_mmio_direct); > > + else > > + rc = unmap_mmio_regions(d, _gfn(pfn), nr_pages, _mfn(pfn)); > > May I ask that you leave alone the use of the conditional > operator here, and _just_ add the new argument? Yes, I can do that. This change is due to the way it was done in the previous version of the series, it doesn't make sense anymore. > > --- a/xen/arch/x86/mm/p2m.c > > +++ b/xen/arch/x86/mm/p2m.c > > @@ -2264,12 +2264,16 @@ static unsigned int mmio_order(const struct domain *d, > > int map_mmio_regions(struct domain *d, > > gfn_t start_gfn, > > unsigned long nr, > > - mfn_t mfn) > > + mfn_t mfn, > > + p2m_type_t p2mt) > > { > > int ret = 0; > > unsigned long i; > > unsigned int iter, order; > > > > + if ( p2mt != p2m_mmio_direct ) > > + return -EOPNOTSUPP; > > Considering this and ... > > > --- a/xen/common/domctl.c > > +++ b/xen/common/domctl.c > > @@ -927,6 +927,7 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) > > unsigned long nr_mfns = op->u.memory_mapping.nr_mfns; > > unsigned long mfn_end = mfn + nr_mfns - 1; > > int add = op->u.memory_mapping.add_mapping; > > + p2m_type_t p2mt; > > > > ret = -EINVAL; > > if ( mfn_end < mfn || /* wrap? */ > > @@ -939,6 +940,10 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl) > > /* Must break hypercall up as this could take a while. */ > > if ( nr_mfns > 64 ) > > break; > > + > > + p2mt = p2m_mmio_direct_dev; > > +#else > > + p2mt = p2m_mmio_direct; > > #endif > > ... this, is there really value in adding the new parameter for > x86? A wrapper macro of the same name could be used to > strip the new last argument at all call sites (current and future > ones). Sure, no problem. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel
next prev parent reply other threads:[~2019-05-02 18:49 UTC|newest] Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-04-30 21:02 [PATCH v2 0/10] iomem memory policy Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-04-30 21:02 ` [PATCH v2 01/10] xen: add a p2mt parameter to map_mmio_regions Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-05-02 14:59 ` Jan Beulich 2019-05-02 14:59 ` [Xen-devel] " Jan Beulich 2019-05-02 18:49 ` Stefano Stabellini [this message] 2019-05-02 18:49 ` Stefano Stabellini 2019-05-15 13:39 ` Oleksandr 2019-05-15 13:39 ` [Xen-devel] " Oleksandr 2019-04-30 21:02 ` [PATCH v2 02/10] xen: rename un/map_mmio_regions to un/map_regions Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-05-01 9:22 ` Julien Grall 2019-05-01 9:22 ` [Xen-devel] " Julien Grall 2019-06-17 21:24 ` Stefano Stabellini 2019-06-18 11:05 ` Julien Grall 2019-06-18 20:19 ` Stefano Stabellini 2019-05-02 15:03 ` Jan Beulich 2019-05-02 15:03 ` [Xen-devel] " Jan Beulich 2019-05-02 18:55 ` Stefano Stabellini 2019-05-02 18:55 ` [Xen-devel] " Stefano Stabellini 2019-04-30 21:02 ` [PATCH v2 03/10] xen: extend XEN_DOMCTL_memory_mapping to handle memory policy Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-05-02 15:12 ` Jan Beulich 2019-05-02 15:12 ` [Xen-devel] " Jan Beulich 2019-06-17 21:28 ` Stefano Stabellini 2019-06-18 8:59 ` Jan Beulich 2019-06-18 20:32 ` Stefano Stabellini 2019-06-18 23:15 ` Stefano Stabellini 2019-06-19 6:53 ` Jan Beulich 2019-05-07 16:41 ` Julien Grall 2019-05-07 16:41 ` [Xen-devel] " Julien Grall 2019-06-17 22:43 ` Stefano Stabellini 2019-06-18 11:13 ` Julien Grall 2019-05-15 14:40 ` Oleksandr 2019-05-15 14:40 ` [Xen-devel] " Oleksandr 2019-04-30 21:02 ` [PATCH v2 04/10] libxc: introduce xc_domain_mem_map_policy Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-04-30 21:02 ` [PATCH v2 05/10] libxl/xl: add memory policy option to iomem Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-05-01 9:42 ` Julien Grall 2019-05-01 9:42 ` [Xen-devel] " Julien Grall 2019-06-17 22:32 ` Stefano Stabellini 2019-06-18 11:09 ` Julien Grall 2019-06-18 11:15 ` Julien Grall 2019-06-18 22:07 ` Stefano Stabellini 2019-06-18 22:20 ` Julien Grall 2019-06-18 22:46 ` Stefano Stabellini 2019-04-30 21:02 ` [PATCH v2 06/10] xen/arm: extend device_tree_for_each_node Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-05-07 17:12 ` Julien Grall 2019-05-07 17:12 ` [Xen-devel] " Julien Grall 2019-04-30 21:02 ` [PATCH v2 07/10] xen/arm: make process_memory_node a device_tree_node_func Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-05-01 9:47 ` Julien Grall 2019-05-01 9:47 ` [Xen-devel] " Julien Grall 2019-04-30 21:02 ` [PATCH v2 08/10] xen/arm: keep track of reserved-memory regions Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-05-01 10:03 ` Julien Grall 2019-05-01 10:03 ` [Xen-devel] " Julien Grall 2019-06-21 23:47 ` Stefano Stabellini 2019-05-07 17:21 ` Julien Grall 2019-05-07 17:21 ` [Xen-devel] " Julien Grall 2019-04-30 21:02 ` [PATCH v2 09/10] xen/arm: map reserved-memory regions as normal memory in dom0 Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-05-07 19:52 ` Julien Grall 2019-05-07 19:52 ` [Xen-devel] " Julien Grall 2019-04-30 21:02 ` [PATCH v2 10/10] xen/arm: add reserved-memory regions to the dom0 memory node Stefano Stabellini 2019-04-30 21:02 ` [Xen-devel] " Stefano Stabellini 2019-05-07 20:15 ` Julien Grall 2019-05-07 20:15 ` [Xen-devel] " Julien Grall 2019-05-10 20:51 ` Stefano Stabellini 2019-05-10 20:51 ` [Xen-devel] " Stefano Stabellini 2019-05-10 21:43 ` Julien Grall 2019-05-10 21:43 ` [Xen-devel] " Julien Grall 2019-05-11 12:40 ` Julien Grall 2019-05-11 12:40 ` [Xen-devel] " Julien Grall 2019-05-20 21:26 ` Stefano Stabellini 2019-05-20 21:26 ` [Xen-devel] " Stefano Stabellini 2019-05-20 22:38 ` Julien Grall 2019-05-20 22:38 ` [Xen-devel] " Julien Grall 2019-06-05 16:30 ` Julien Grall 2019-06-21 23:47 ` Stefano Stabellini 2019-05-16 16:52 ` [PATCH v2 0/10] iomem memory policy Oleksandr 2019-05-16 16:52 ` [Xen-devel] " Oleksandr 2019-06-21 23:48 ` Stefano Stabellini
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