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From: Roger Pau Monne <roger.pau@citrix.com>
To: <xen-devel@lists.xenproject.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	Roger Pau Monne <roger.pau@citrix.com>,
	Ian Jackson <iwj@xenproject.org>, Wei Liu <wl@xen.org>
Subject: [PATCH 05/21] libs/guest: introduce helper to fetch a domain cpu policy
Date: Tue, 23 Mar 2021 10:58:33 +0100	[thread overview]
Message-ID: <20210323095849.37858-6-roger.pau@citrix.com> (raw)
In-Reply-To: <20210323095849.37858-1-roger.pau@citrix.com>

Such helper is based on the existing functions to fetch a CPUID and
MSR policies, but uses the xc_cpu_policy_t type to return the data to
the caller.

No user of the interface introduced on the patch.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
---
 tools/include/xenctrl.h         |  2 ++
 tools/libs/guest/xg_cpuid_x86.c | 34 +++++++++++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h
index fc8e4b28781..8b8b30a2764 100644
--- a/tools/include/xenctrl.h
+++ b/tools/include/xenctrl.h
@@ -2599,6 +2599,8 @@ void xc_cpu_policy_destroy(xc_cpu_policy_t policy);
 /* Retrieve a system policy, or get/set a domains policy. */
 int xc_cpu_policy_get_system(xc_interface *xch, unsigned int idx,
                              xc_cpu_policy_t policy);
+int xc_cpu_policy_get_domain(xc_interface *xch, uint32_t domid,
+                             xc_cpu_policy_t policy);
 
 int xc_get_cpu_levelling_caps(xc_interface *xch, uint32_t *caps);
 int xc_get_cpu_featureset(xc_interface *xch, uint32_t index,
diff --git a/tools/libs/guest/xg_cpuid_x86.c b/tools/libs/guest/xg_cpuid_x86.c
index 3710fb63839..75ac70996ac 100644
--- a/tools/libs/guest/xg_cpuid_x86.c
+++ b/tools/libs/guest/xg_cpuid_x86.c
@@ -777,3 +777,37 @@ int xc_cpu_policy_get_system(xc_interface *xch, unsigned int idx,
     free(msrs);
     return rc;
 }
+
+int xc_cpu_policy_get_domain(xc_interface *xch, uint32_t domid,
+                             xc_cpu_policy_t policy)
+{
+    unsigned int nr_leaves, nr_msrs;
+    xen_cpuid_leaf_t *leaves = NULL;
+    xen_msr_entry_t *msrs = NULL;
+    int rc;
+
+    rc = allocate_buffers(xch, &nr_leaves, &leaves, &nr_msrs, &msrs);
+    if ( rc )
+    {
+        errno = -rc;
+        return -1;
+    }
+
+    rc = xc_get_domain_cpu_policy(xch, domid, &nr_leaves, leaves, &nr_msrs,
+                                  msrs);
+    if ( rc )
+    {
+        PERROR("Failed to obtain domain %u policy", domid);
+        rc = -1;
+        goto out;
+    }
+
+    rc = deserialize_policy(xch, policy, nr_leaves, leaves, nr_msrs, msrs);
+    if ( rc )
+        errno = -rc;
+
+ out:
+    free(leaves);
+    free(msrs);
+    return rc;
+}
-- 
2.30.1



  parent reply	other threads:[~2021-03-23 10:00 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-23  9:58 [PATCH 00/21] libs/guest: new CPUID/MSR interface Roger Pau Monne
2021-03-23  9:58 ` [PATCH 01/21] libxl: don't ignore the return value from xc_cpuid_apply_policy Roger Pau Monne
2021-03-30 15:21   ` Jan Beulich
2021-03-30 15:38   ` Andrew Cooper
2021-03-31 18:12   ` Andrew Cooper
2021-03-23  9:58 ` [PATCH 02/21] libs/guest: rename xc_get_cpu_policy_size to xc_cpu_policy_get_size Roger Pau Monne
2021-03-31 19:03   ` Andrew Cooper
2021-03-23  9:58 ` [PATCH 03/21] libs/guest: introduce xc_cpu_policy_t Roger Pau Monne
2021-03-31 20:10   ` Andrew Cooper
2021-04-01  8:48     ` Roger Pau Monné
2021-03-23  9:58 ` [PATCH 04/21] libs/guest: introduce helper to fetch a system cpu policy Roger Pau Monne
2021-03-30 15:35   ` Jan Beulich
2021-04-01 13:56   ` Andrew Cooper
2021-03-23  9:58 ` Roger Pau Monne [this message]
2021-03-30 15:37   ` [PATCH 05/21] libs/guest: introduce helper to fetch a domain " Jan Beulich
2021-03-31 11:06     ` Roger Pau Monné
2021-04-01 13:32       ` Andrew Cooper
2021-03-23  9:58 ` [PATCH 06/21] libs/guest: introduce helper to serialize a " Roger Pau Monne
2021-03-23  9:58 ` [PATCH 07/21] tools: switch existing users of xc_get_{system,domain}_cpu_policy Roger Pau Monne
2021-03-23  9:58 ` [PATCH 08/21] libs/guest: introduce a helper to apply a cpu policy to a domain Roger Pau Monne
2021-03-23  9:58 ` [PATCH 09/21] libs/guest: allow fetching a specific CPUID leaf from a cpu policy Roger Pau Monne
2021-04-01 14:47   ` Andrew Cooper
2021-04-08 15:53     ` Roger Pau Monné
2021-03-23  9:58 ` [PATCH 10/21] libs/guest: allow fetching a specific MSR entry " Roger Pau Monne
2021-03-23  9:58 ` [PATCH 11/21] libs/guest: allow updating a cpu policy CPUID data Roger Pau Monne
2021-03-30 15:56   ` Jan Beulich
2021-03-31 12:47     ` Roger Pau Monné
2021-04-01 14:55   ` Andrew Cooper
2021-03-23  9:58 ` [PATCH 12/21] libs/guest: allow updating a cpu policy MSR data Roger Pau Monne
2021-03-23  9:58 ` [PATCH 13/21] libs/guest: switch users of xc_set_domain_cpu_policy Roger Pau Monne
2021-04-01 15:04   ` Andrew Cooper
2021-03-23  9:58 ` [PATCH 14/21] libs/guest: introduce helper to check cpu policy compatibility Roger Pau Monne
2021-03-30 16:02   ` Jan Beulich
2021-03-31 12:40     ` Roger Pau Monné
2021-03-31 14:57       ` Jan Beulich
2021-04-01 16:14   ` Andrew Cooper
2021-03-23  9:58 ` [PATCH 15/21] libs/guest: obtain a compatible cpu policy from two input ones Roger Pau Monne
2021-03-31 15:24   ` Jan Beulich
2021-04-01 16:26   ` Andrew Cooper
2021-04-09 10:56     ` Roger Pau Monné
2021-03-23  9:58 ` [PATCH 16/21] libs/guest: make a cpu policy compatible with older Xen versions Roger Pau Monne
2021-03-31 15:29   ` Jan Beulich
2021-04-01 16:31   ` Andrew Cooper
2021-03-23  9:58 ` [PATCH 17/21] libs/guest: introduce helper set cpu topology in cpu policy Roger Pau Monne
2021-04-01 17:22   ` Andrew Cooper
2021-03-23  9:58 ` [PATCH 18/21] libs/guest: rework xc_cpuid_xend_policy Roger Pau Monne
2021-03-23  9:58 ` [PATCH 19/21] libs/guest: apply a featureset into a cpu policy Roger Pau Monne
2021-03-23  9:58 ` [PATCH 20/21] libs/{light,guest}: implement xc_cpuid_apply_policy in libxl Roger Pau Monne
2021-04-01 17:44   ` Andrew Cooper
2021-04-09 14:57     ` Roger Pau Monné
2021-03-23  9:58 ` [PATCH 21/21] libs/guest: (re)move xc_cpu_policy_apply_cpuid Roger Pau Monne
2021-04-01 17:53   ` Andrew Cooper

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