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 v2 13/21] libs/guest: allow updating a cpu policy MSR data
Date: Tue, 13 Apr 2021 16:01:31 +0200 [thread overview]
Message-ID: <20210413140140.73690-14-roger.pau@citrix.com> (raw)
In-Reply-To: <20210413140140.73690-1-roger.pau@citrix.com>
Introduce a helper to update the MSR policy using an array of
xen_msr_entry_t entries. Note the MSRs present in the input
xen_msr_entry_t array will replace any existing entries on the
policy.
No user of the interface introduced on this patch.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
---
Changes since v1:
- Drop logic to update entries manually.
- Only print failure message if err_msr != -1.
---
tools/include/xenctrl.h | 2 ++
tools/libs/guest/xg_cpuid_x86.c | 18 ++++++++++++++++++
2 files changed, 20 insertions(+)
diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h
index 49f919f16a7..9a6d1b126d8 100644
--- a/tools/include/xenctrl.h
+++ b/tools/include/xenctrl.h
@@ -2616,6 +2616,8 @@ int xc_cpu_policy_get_msr(xc_interface *xch, const xc_cpu_policy_t policy,
int xc_cpu_policy_update_cpuid(xc_interface *xch, xc_cpu_policy_t policy,
const xen_cpuid_leaf_t *leaves,
uint32_t nr);
+int xc_cpu_policy_update_msrs(xc_interface *xch, xc_cpu_policy_t policy,
+ const xen_msr_entry_t *msrs, uint32_t nr);
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 00595e14cc3..26b09322dfa 100644
--- a/tools/libs/guest/xg_cpuid_x86.c
+++ b/tools/libs/guest/xg_cpuid_x86.c
@@ -907,3 +907,21 @@ int xc_cpu_policy_update_cpuid(xc_interface *xch, xc_cpu_policy_t policy,
return rc;
}
+
+int xc_cpu_policy_update_msrs(xc_interface *xch, xc_cpu_policy_t policy,
+ const xen_msr_entry_t *msrs, uint32_t nr)
+{
+ unsigned int err_msr = -1;
+ int rc = x86_msr_copy_from_buffer(&policy->msr, msrs, nr, &err_msr);
+
+ if ( rc )
+ {
+ if ( err_msr != -1 )
+ ERROR("Failed to deserialise MSRS (err index %#x) (%d = %s)",
+ err_msr, -rc, strerror(-rc));
+ errno = -rc;
+ rc = -1;
+ }
+
+ return rc;
+}
--
2.30.1
next prev parent reply other threads:[~2021-04-13 14:03 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 14:01 [PATCH v2 00/21] libs/guest: new CPUID/MSR interface Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 01/21] libxl: don't ignore the return value from xc_cpuid_apply_policy Roger Pau Monne
2021-04-28 15:13 ` Anthony PERARD
2021-04-13 14:01 ` [PATCH v2 02/21] libs/guest: rename xc_get_cpu_policy_size to xc_cpu_policy_get_size Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 03/21] libs/guest: introduce xc_cpu_policy_t Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 04/21] libs/guest: introduce helper to fetch a system cpu policy Roger Pau Monne
2021-04-14 13:28 ` Jan Beulich
2021-04-13 14:01 ` [PATCH v2 05/21] libs/guest: introduce helper to fetch a domain " Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 06/21] libs/guest: introduce helper to serialize a " Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 07/21] tools: switch existing users of xc_get_{system,domain}_cpu_policy Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 08/21] libs/guest: introduce a helper to apply a cpu policy to a domain Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 09/21] libs/guest: allow fetching a specific CPUID leaf from a cpu policy Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 10/21] tests/cpu-policy: add sorted MSR test Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 11/21] libs/guest: allow fetching a specific MSR entry from a cpu policy Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 12/21] libs/guest: allow updating a cpu policy CPUID data Roger Pau Monne
2021-04-13 14:01 ` Roger Pau Monne [this message]
2021-04-13 14:01 ` [PATCH v2 14/21] libs/guest: introduce helper to check cpu policy compatibility Roger Pau Monne
2021-04-14 13:36 ` Jan Beulich
2021-04-22 8:22 ` Roger Pau Monné
2021-04-22 8:31 ` Jan Beulich
2021-04-13 14:01 ` [PATCH v2 15/21] libs/guest: obtain a compatible cpu policy from two input ones Roger Pau Monne
2021-04-14 13:49 ` Jan Beulich
2021-04-22 9:42 ` Roger Pau Monné
2021-04-22 9:58 ` Jan Beulich
2021-04-22 10:34 ` Roger Pau Monné
2021-04-22 10:48 ` Jan Beulich
2021-04-22 10:56 ` Roger Pau Monné
2021-04-22 11:05 ` Jan Beulich
2021-04-22 11:37 ` Roger Pau Monné
2021-04-22 11:42 ` Jan Beulich
2021-04-22 12:07 ` Roger Pau Monné
2021-04-22 12:08 ` Jan Beulich
2021-04-21 10:22 ` Wei Liu
2021-04-21 11:26 ` Roger Pau Monné
2021-04-21 16:42 ` Wei Liu
2021-04-13 14:01 ` [PATCH v2 16/21] libs/guest: make a cpu policy compatible with older Xen versions Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 17/21] libs/guest: introduce helper set cpu topology in cpu policy Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 18/21] libs/guest: rework xc_cpuid_xend_policy Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 19/21] libs/guest: apply a featureset into a cpu policy Roger Pau Monne
2021-04-13 14:01 ` [PATCH v2 20/21] libs/{light,guest}: implement xc_cpuid_apply_policy in libxl Roger Pau Monne
2021-04-28 16:19 ` Anthony PERARD
2021-04-13 14:01 ` [PATCH v2 21/21] libs/guest: (re)move xc_cpu_policy_apply_cpuid Roger Pau Monne
2021-04-28 16:45 ` Anthony PERARD
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