* [PATCH] x86/public: Further correctsion to vcpu context comments
@ 2017-09-01 13:14 Andrew Cooper
2017-09-01 13:30 ` Jan Beulich
2017-09-01 14:36 ` Roger Pau Monné
0 siblings, 2 replies; 3+ messages in thread
From: Andrew Cooper @ 2017-09-01 13:14 UTC (permalink / raw)
To: Xen-devel; +Cc: Andrew Cooper, Wei Liu, Jan Beulich, Roger Pau Monné
VCPUOP_initialise and DOMCTL_setvcpucontext are not symetric.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
---
xen/include/public/arch-x86/xen.h | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/xen/include/public/arch-x86/xen.h b/xen/include/public/arch-x86/xen.h
index 3f68a43..ff91831 100644
--- a/xen/include/public/arch-x86/xen.h
+++ b/xen/include/public/arch-x86/xen.h
@@ -162,10 +162,12 @@ typedef uint64_t tsc_timestamp_t; /* RDTSC timestamp */
* The following is all CPU context. Note that the fpu_ctxt block is filled
* in by FXSAVE if the CPU has feature FXSR; otherwise FSAVE is used.
*
- * Also note that when calling DOMCTL_setvcpucontext and VCPUOP_initialise for
- * HVM guests, not all information in this structure is updated, the fields
- * read include: fpu_ctxt (if VGCT_I387_VALID is set), flags, user_regs and
- * debugreg[*].
+ * Also note that when calling DOMCTL_setvcpucontext for HVM guests, not all
+ * information in this structure is updated, the fields read include: fpu_ctxt
+ * (if VGCT_I387_VALID is set), flags, user_regs and debugreg[*].
+ *
+ * Note: VCPUOP_initialise for HVM guests is non-symetric with
+ * DOMCTL_setvcpucontext, and uses struct vcpu_hvm_context from hvm/hvm_vcpu.h
*/
struct vcpu_guest_context {
/* FPU registers come first so they can be aligned for FXSAVE/FXRSTOR. */
--
2.1.4
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* Re: [PATCH] x86/public: Further correctsion to vcpu context comments
2017-09-01 13:14 [PATCH] x86/public: Further correctsion to vcpu context comments Andrew Cooper
@ 2017-09-01 13:30 ` Jan Beulich
2017-09-01 14:36 ` Roger Pau Monné
1 sibling, 0 replies; 3+ messages in thread
From: Jan Beulich @ 2017-09-01 13:30 UTC (permalink / raw)
To: Andrew Cooper; +Cc: Xen-devel, Wei Liu, Roger Pau Monné
>>> On 01.09.17 at 15:14, <andrew.cooper3@citrix.com> wrote:
> VCPUOP_initialise and DOMCTL_setvcpucontext are not symetric.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
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^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH] x86/public: Further correctsion to vcpu context comments
2017-09-01 13:14 [PATCH] x86/public: Further correctsion to vcpu context comments Andrew Cooper
2017-09-01 13:30 ` Jan Beulich
@ 2017-09-01 14:36 ` Roger Pau Monné
1 sibling, 0 replies; 3+ messages in thread
From: Roger Pau Monné @ 2017-09-01 14:36 UTC (permalink / raw)
To: Andrew Cooper; +Cc: Wei Liu, Jan Beulich, Xen-devel
There's a typo in the subject line s/correctsion/correction/.
On Fri, Sep 01, 2017 at 02:14:41PM +0100, Andrew Cooper wrote:
> VCPUOP_initialise and DOMCTL_setvcpucontext are not symetric.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Long term DOMCTL_setvcpucontext should only be used by PV guests and
gdbsx should instead use the vpcu context save/restore IMHO.
Roger.
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2017-09-01 13:30 ` Jan Beulich
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