From: "Jan Beulich" <JBeulich@suse.com>
To: Ed White <edmund.h.white@intel.com>
Cc: Tim Deegan <tim@xen.org>, Ravi Sahita <ravi.sahita@intel.com>,
Wei Liu <wei.liu2@citrix.com>,
George Dunlap <george.dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>,
xen-devel@lists.xen.org, Jun Nakajima <jun.nakajima@intel.com>,
tlengyel@novetta.com, Daniel De Graaf <dgdegra@tycho.nsa.gov>
Subject: Re: [PATCH v7 11/15] x86/altp2m: define and implement alternate p2m HVMOP types.
Date: Thu, 23 Jul 2015 04:22:17 -0600 [thread overview]
Message-ID: <55B0DC790200007800094762@prv-mh.provo.novell.com> (raw)
In-Reply-To: <1437606081-6964-12-git-send-email-edmund.h.white@intel.com>
>>> On 23.07.15 at 01:01, <edmund.h.white@intel.com> wrote:
> Signed-off-by: Ed White <edmund.h.white@intel.com>
>
> Acked-by: Jan Beulich <jbeulich@suse.com>
And I have to withdraw this ack pending clarification of (and perhaps
adjustment to) the #VE info address interface.
> --- a/xen/arch/x86/hvm/hvm.c
> +++ b/xen/arch/x86/hvm/hvm.c
> @@ -6138,6 +6138,140 @@ static int hvmop_get_param(
> return rc;
> }
>
> +static int do_altp2m_op(
> + XEN_GUEST_HANDLE_PARAM(void) arg)
> +{
> + struct xen_hvm_altp2m_op a;
> + struct domain *d = NULL;
> + int rc = 0;
> +
> + if ( !hvm_altp2m_supported() )
> + return -EOPNOTSUPP;
> +
> + if ( copy_from_guest(&a, arg, 1) )
> + return -EFAULT;
> +
> + if ( a.pad1 || a.pad2 ||
> + (a.version != HVMOP_ALTP2M_INTERFACE_VERSION) ||
> + (a.cmd < HVMOP_altp2m_get_domain_state) ||
> + (a.cmd > HVMOP_altp2m_change_gfn) )
I'm afraid such a change invalidates any earlier ack, even if ti is
correct. Instead of this, why don't you start numbering of the
sub-ops at zero? Or if you really have a reason to start at 1,
why not simply check a.cmd against zero (without using any
particular sub-op value)? And then it escapes me why this can't
be handled in a default case in the switch statement below
anyway.
Jan
next prev parent reply other threads:[~2015-07-23 10:22 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-22 23:01 [PATCH v7 00/15] Alternate p2m: support multiple copies of host p2m Ed White
2015-07-22 23:01 ` [PATCH v7 01/15] common/domain: Helpers to pause a domain while in context Ed White
2015-07-22 23:01 ` [PATCH v7 02/15] VMX: VMFUNC and #VE definitions and detection Ed White
2015-07-22 23:01 ` [PATCH v7 03/15] VMX: implement suppress #VE Ed White
2015-07-22 23:01 ` [PATCH v7 04/15] x86/HVM: Hardware alternate p2m support detection Ed White
2015-07-22 23:01 ` [PATCH v7 05/15] x86/altp2m: basic data structures and support routines Ed White
2015-07-23 9:22 ` Jan Beulich
2015-07-23 14:36 ` Sahita, Ravi
2015-07-23 14:53 ` Jan Beulich
2015-07-23 15:00 ` Sahita, Ravi
2015-07-22 23:01 ` [PATCH v7 06/15] VMX/altp2m: add code to support EPTP switching and #VE Ed White
2015-07-23 9:43 ` Jan Beulich
2015-07-23 14:40 ` Sahita, Ravi
2015-07-23 15:00 ` Jan Beulich
2015-07-23 15:02 ` Sahita, Ravi
2015-07-22 23:01 ` [PATCH v7 07/15] VMX: add VMFUNC leaf 0 (EPTP switching) to emulator Ed White
2015-07-22 23:01 ` [PATCH v7 08/15] x86/altp2m: add control of suppress_ve Ed White
2015-07-22 23:01 ` [PATCH v7 09/15] x86/altp2m: alternate p2m memory events Ed White
2015-07-22 23:01 ` [PATCH v7 10/15] x86/altp2m: add remaining support routines Ed White
2015-07-23 10:05 ` Jan Beulich
2015-07-23 14:51 ` Sahita, Ravi
2015-07-23 15:02 ` Jan Beulich
2015-07-23 16:08 ` George Dunlap
2015-07-23 16:15 ` Jan Beulich
2015-07-23 16:50 ` Sahita, Ravi
2015-07-23 19:10 ` George Dunlap
2015-07-22 23:01 ` [PATCH v7 11/15] x86/altp2m: define and implement alternate p2m HVMOP types Ed White
2015-07-23 10:22 ` Jan Beulich [this message]
2015-07-23 14:56 ` Sahita, Ravi
2015-07-23 15:08 ` Jan Beulich
2015-07-23 15:16 ` Sahita, Ravi
2015-07-22 23:01 ` [PATCH v7 12/15] x86/altp2m: Add altp2mhvm HVM domain parameter Ed White
2015-07-22 23:01 ` [PATCH v7 13/15] x86/altp2m: XSM hooks for altp2m HVM ops Ed White
2015-07-23 16:08 ` Jan Beulich
2015-07-23 16:56 ` Sahita, Ravi
2015-07-24 7:49 ` Jan Beulich
2015-07-22 23:01 ` [PATCH v7 14/15] tools/libxc: add support to altp2m hvmops Ed White
2015-07-22 23:01 ` [PATCH v7 15/15] tools/xen-access: altp2m testcases Ed White
2015-07-23 17:12 ` [PATCH v7 00/15] Alternate p2m: support multiple copies of host p2m Wei Liu
2015-07-23 19:11 ` George Dunlap
2015-07-24 9:56 ` Wei Liu
2015-07-24 16:06 ` Sahita, Ravi
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