From: Wei Liu <wei.liu2@citrix.com>
To: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: roger.pau@citrix.com, Wei Liu <wei.liu2@citrix.com>,
Stefano Stabellini <sstabellini@kernel.org>,
xen-devel@lists.xen.org
Subject: Re: [PATCH RFC 18/20] libxc/acpi: Build ACPI tables for HVMlite guests
Date: Thu, 16 Jun 2016 09:54:13 +0100 [thread overview]
Message-ID: <20160616085413.GJ28116@citrix.com> (raw)
In-Reply-To: <5755938A.1090207@oracle.com>
On Mon, Jun 06, 2016 at 11:15:22AM -0400, Boris Ostrovsky wrote:
[...]
> > +static int init_acpi_config(struct xc_dom_image *dom,
> > + struct acpi_config *config)
> > +{
> > + xc_interface *xch = dom->xch;
> > + uint32_t domid = dom->guest_domid;
> > + xc_dominfo_t info;
> > + int i, rc;
> > +
> > + memset(config, 0, sizeof(*config));
> > +
> > + config->dsdt_anycpu = config->dsdt_15cpu = dsdt_empty;
> > + config->dsdt_anycpu_len = config->dsdt_15cpu_len = dsdt_empty_len;
> > +
> > + rc = xc_domain_getinfo(xch, domid, 1, &info);
> > + if ( rc < 0 )
> > + {
> > + DOMPRINTF("%s: getdomaininfo failed (rc=%d)", __FUNCTION__, rc);
> > + return rc;
> > + }
> > +
> > + config->apic_mode = 1;
> > +
> > + if ( dom->nr_vnodes )
> > + {
> > + struct acpi_numa *numa = &config->numa;
> > +
> > + numa->vmemrange = calloc(dom->nr_vmemranges,
> > + sizeof(*numa->vmemrange));
> > + numa->vdistance = calloc(dom->nr_vnodes,
> > + sizeof(*numa->vdistance));
> > + numa->vcpu_to_vnode = calloc(config->nr_vcpus,
> > + sizeof(*numa->vcpu_to_vnode));
> > + if ( !numa->vmemrange || !numa->vdistance || !numa->vcpu_to_vnode )
> > + {
> > + DOMPRINTF("%s: Out of memory", __FUNCTION__);
> > + free(numa->vmemrange);
> > + free(numa->vdistance);
> > + free(numa->vcpu_to_vnode);
> > + return -ENOMEM;
> > + }
> > +
> > + rc = xc_domain_getvnuma(xch, domid, &numa->nr_vnodes,
> > + &numa->nr_vmemranges,
> > + &config->nr_vcpus, numa->vmemrange,
> > + numa->vdistance, numa->vcpu_to_vnode);
> > +
> > + if ( rc )
> > + {
> > + DOMPRINTF("%s: xc_domain_getvnuma failed (rc=%d)", __FUNCTION__, rc);
> > + return rc;
> > + }
> > + }
> > + else
> > + config->nr_vcpus = info.max_vcpu_id + 1;
> > This looks wrong, at least it is not immediately clear why you would
> > want to do this.
>
>
> Why is this wrong? If we have one VCPU max_vcpu_id will be zero, won't it?
>
I'm not saying it is absolutely wrong, just that I don't quite
understand why it is coded this way.
It's guarded by dom->nr_vnodes and the code is not immediately clear why
you want to do that. Perhaps you can add a comment here?
Wei.
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next prev parent reply other threads:[~2016-06-16 8:54 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-06 1:25 [PATCH RFC 00/20] Make ACPI builder available to components other than hvmloader Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 01/20] hvmloader: Provide hvmloader_acpi_build_tables() Boris Ostrovsky
2016-06-02 12:42 ` Jan Beulich
2016-06-02 16:39 ` Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 02/20] acpi/hvmloader: Move acpi_info initialization out of ACPI code Boris Ostrovsky
2016-06-02 12:54 ` Jan Beulich
2016-06-02 16:54 ` Boris Ostrovsky
2016-06-03 12:13 ` Jan Beulich
2016-06-03 14:42 ` Boris Ostrovsky
2016-06-03 14:55 ` Jan Beulich
2016-06-03 15:29 ` Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 03/20] acpi/hvmloader: Initialize vm_gid data outside " Boris Ostrovsky
2016-06-02 13:03 ` Jan Beulich
2016-06-02 17:01 ` Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 04/20] acpi/hvmloader: Decide which SSDTs to build in hvmloader Boris Ostrovsky
2016-06-02 13:07 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 05/20] acpi/hvmloader: Move passthrough initialization from ACPI code Boris Ostrovsky
2016-06-02 13:52 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 06/20] acpi/hvmloader: Collect processor and NUMA info in hvmloader Boris Ostrovsky
2016-06-02 14:05 ` Jan Beulich
2016-06-02 17:18 ` Boris Ostrovsky
2016-06-03 12:16 ` Jan Beulich
2016-06-03 14:49 ` Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 07/20] acpi/hvmloader: Set TIS header address " Boris Ostrovsky
2016-06-02 14:09 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 08/20] acpi/hvmloader: Make providing IOAPIC in MADT optional Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 09/20] acpi/hvmloader: Build WAET optionally Boris Ostrovsky
2016-06-02 14:32 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 10/20] acpi/hvmloader: Provide address of acpi_info as an argument to ACPI code Boris Ostrovsky
2016-06-03 16:03 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 11/20] acpi/hvmloader: Translate all addresses when assigning addresses in ACPI tables Boris Ostrovsky
2016-06-06 10:48 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 12/20] acpi/hvmloader: Link ACPI object files directly Boris Ostrovsky
2016-06-06 11:04 ` Jan Beulich
2016-06-06 14:20 ` Boris Ostrovsky
2016-06-06 14:29 ` Jan Beulich
2016-06-06 14:49 ` Boris Ostrovsky
2016-06-06 14:57 ` Jan Beulich
2016-06-06 15:31 ` Andrew Cooper
2016-06-06 15:41 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 13/20] acpi/hvmloader: Add stdio.h, string.h and x86.h Boris Ostrovsky
2016-06-06 11:31 ` Jan Beulich
2016-06-06 15:08 ` Boris Ostrovsky
2016-06-06 15:22 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 14/20] acpi/hvmloader: Replace mem_alloc() and virt_to_phys() with memory ops Boris Ostrovsky
2016-06-06 12:58 ` Jan Beulich
2016-06-06 15:46 ` Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 15/20] acpi: Move ACPI code to xen/common/libacpi Boris Ostrovsky
2016-06-06 13:05 ` Jan Beulich
2016-06-06 16:09 ` Boris Ostrovsky
2016-06-07 6:20 ` Jan Beulich
2016-06-07 12:24 ` Roger Pau Monné
2016-06-07 14:32 ` Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 16/20] x86/vlapic: Don't try to accept 8259 interrupt if !has_vpic() Boris Ostrovsky
2016-06-03 16:14 ` Jan Beulich
2016-06-03 17:50 ` Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 17/20] x86: Allow LAPIC-only emulation_flags for HVM guests Boris Ostrovsky
2016-06-03 16:18 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 18/20] libxc/acpi: Build ACPI tables for HVMlite guests Boris Ostrovsky
2016-06-02 16:26 ` Roger Pau Monné
2016-06-06 12:03 ` Wei Liu
2016-06-06 15:15 ` Boris Ostrovsky
2016-06-16 8:54 ` Wei Liu [this message]
2016-06-16 13:07 ` Boris Ostrovsky
2016-06-06 13:29 ` Jan Beulich
2016-06-06 16:59 ` Boris Ostrovsky
2016-06-07 6:17 ` Jan Beulich
2016-06-07 13:59 ` Boris Ostrovsky
2016-06-07 14:10 ` Jan Beulich
2016-06-07 14:47 ` Boris Ostrovsky
2016-06-07 15:00 ` Jan Beulich
2016-04-06 1:25 ` [PATCH RFC 19/20] acpi: Set HW_REDUCED_ACPI in FADT if IOAPIC is not supported Boris Ostrovsky
2016-06-06 13:38 ` Jan Beulich
2016-06-06 17:31 ` Boris Ostrovsky
2016-06-07 6:06 ` Jan Beulich
2016-06-07 14:02 ` Boris Ostrovsky
2016-06-07 14:12 ` Jan Beulich
2016-06-07 15:17 ` Boris Ostrovsky
2016-06-07 15:41 ` Jan Beulich
2016-06-08 22:04 ` Boris Ostrovsky
2016-06-09 8:13 ` Roger Pau Monné
2016-06-09 8:41 ` Jan Beulich
2016-06-09 14:09 ` Boris Ostrovsky
2016-04-06 1:25 ` [PATCH RFC 20/20] acpi: Make ACPI builder available to hypervisor code Boris Ostrovsky
2016-06-06 13:48 ` Jan Beulich
2016-05-09 20:10 ` [PATCH RFC 00/20] Make ACPI builder available to components other than hvmloader Boris Ostrovsky
2016-05-10 7:25 ` Jan Beulich
2016-06-02 12:40 ` Jan Beulich
2016-06-02 16:37 ` Boris Ostrovsky
2016-06-03 7:18 ` Roger Pau Monné
2016-06-03 10:08 ` Jan Beulich
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