From: Chao Gao <chao.gao@intel.com>
To: xen-devel@lists.xenproject.org
Cc: "Ashok Raj" <ashok.raj@intel.com>, "Wei Liu" <wl@xen.org>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Jan Beulich" <jbeulich@suse.com>,
"Chao Gao" <chao.gao@intel.com>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: [Xen-devel] [PATCH v9 11/15] microcode: unify loading update during CPU resuming and AP wakeup
Date: Mon, 19 Aug 2019 09:25:24 +0800 [thread overview]
Message-ID: <1566177928-19114-12-git-send-email-chao.gao@intel.com> (raw)
In-Reply-To: <1566177928-19114-1-git-send-email-chao.gao@intel.com>
Both are loading the cached patch. Since APs call the unified function,
microcode_update_one(), during wakeup, the 'start_update' parameter
which originally used to distinguish BSP and APs is redundant. So remove
this parameter.
Signed-off-by: Chao Gao <chao.gao@intel.com>
---
Note that here is a functional change: resuming a CPU would call
->end_update() now while previously it wasn't. Not quite sure
whether it is correct.
Changes in v9:
- return -EOPNOTSUPP rather than 0 if microcode_ops is NULL in
microcode_update_one()
- rebase and fix conflicts.
Changes in v8:
- split out from the previous patch
---
xen/arch/x86/acpi/power.c | 2 +-
xen/arch/x86/microcode.c | 90 ++++++++++++++++++-----------------------
xen/arch/x86/smpboot.c | 5 +--
xen/include/asm-x86/processor.h | 4 +-
4 files changed, 44 insertions(+), 57 deletions(-)
diff --git a/xen/arch/x86/acpi/power.c b/xen/arch/x86/acpi/power.c
index 4f21903..24798d5 100644
--- a/xen/arch/x86/acpi/power.c
+++ b/xen/arch/x86/acpi/power.c
@@ -253,7 +253,7 @@ static int enter_state(u32 state)
console_end_sync();
- microcode_resume_cpu();
+ microcode_update_one();
if ( !recheck_cpu_features(0) )
panic("Missing previously available feature(s)\n");
diff --git a/xen/arch/x86/microcode.c b/xen/arch/x86/microcode.c
index a2febc7..bdd9c9f 100644
--- a/xen/arch/x86/microcode.c
+++ b/xen/arch/x86/microcode.c
@@ -203,24 +203,6 @@ static struct microcode_patch *parse_blob(const char *buf, uint32_t len)
return NULL;
}
-int microcode_resume_cpu(void)
-{
- int err;
- struct cpu_signature *sig = &this_cpu(cpu_sig);
-
- if ( !microcode_ops )
- return 0;
-
- spin_lock(µcode_mutex);
-
- err = microcode_ops->collect_cpu_info(sig);
- if ( likely(!err) )
- err = microcode_ops->apply_microcode(microcode_cache);
- spin_unlock(µcode_mutex);
-
- return err;
-}
-
void microcode_free_patch(struct microcode_patch *microcode_patch)
{
microcode_ops->free_patch(microcode_patch->mc);
@@ -384,11 +366,29 @@ static int __init microcode_init(void)
}
__initcall(microcode_init);
-int __init early_microcode_update_cpu(bool start_update)
+/* Load a cached update to current cpu */
+int microcode_update_one(void)
+{
+ int rc;
+
+ if ( !microcode_ops )
+ return -EOPNOTSUPP;
+
+ rc = microcode_update_cpu(NULL);
+
+ if ( microcode_ops->end_update )
+ microcode_ops->end_update();
+
+ return rc;
+}
+
+/* BSP calls this function to parse ucode blob and then apply an update. */
+int __init early_microcode_update_cpu(void)
{
int rc = 0;
void *data = NULL;
size_t len;
+ struct microcode_patch *patch;
if ( !microcode_ops )
return -ENOSYS;
@@ -409,43 +409,33 @@ int __init early_microcode_update_cpu(bool start_update)
if ( !data )
return -ENOMEM;
- if ( start_update )
- {
- struct microcode_patch *patch;
-
- if ( microcode_ops->start_update )
- rc = microcode_ops->start_update();
-
- if ( rc )
- return rc;
-
- patch = parse_blob(data, len);
- if ( IS_ERR(patch) )
- {
- printk(XENLOG_INFO "Parsing microcode blob error %ld\n",
- PTR_ERR(patch));
- return PTR_ERR(patch);
- }
+ if ( microcode_ops->start_update )
+ rc = microcode_ops->start_update();
- if ( !patch )
- {
- printk(XENLOG_INFO "No ucode found. Update aborted!\n");
- return -EINVAL;
- }
+ if ( rc )
+ return rc;
- spin_lock(µcode_mutex);
- rc = microcode_update_cache(patch);
- spin_unlock(µcode_mutex);
+ patch = parse_blob(data, len);
+ if ( IS_ERR(patch) )
+ {
+ printk(XENLOG_INFO "Parsing microcode blob error %ld\n",
+ PTR_ERR(patch));
+ return PTR_ERR(patch);
+ }
- ASSERT(rc);
+ if ( !patch )
+ {
+ printk(XENLOG_INFO "No ucode found. Update aborted!\n");
+ return -EINVAL;
}
- rc = microcode_update_cpu(NULL);
+ spin_lock(µcode_mutex);
+ rc = microcode_update_cache(patch);
+ spin_unlock(µcode_mutex);
- if ( microcode_ops->end_update )
- microcode_ops->end_update();
+ ASSERT(rc);
- return rc;
+ return microcode_update_one();
}
int __init early_microcode_init(void)
@@ -465,7 +455,7 @@ int __init early_microcode_init(void)
microcode_ops->collect_cpu_info(&this_cpu(cpu_sig));
if ( ucode_mod.mod_end || ucode_blob.size )
- rc = early_microcode_update_cpu(true);
+ rc = early_microcode_update_cpu();
}
return rc;
diff --git a/xen/arch/x86/smpboot.c b/xen/arch/x86/smpboot.c
index c818cfc..e62a1ca 100644
--- a/xen/arch/x86/smpboot.c
+++ b/xen/arch/x86/smpboot.c
@@ -361,10 +361,7 @@ void start_secondary(void *unused)
initialize_cpu_data(cpu);
- if ( system_state <= SYS_STATE_smp_boot )
- early_microcode_update_cpu(false);
- else
- microcode_resume_cpu();
+ microcode_update_one();
/*
* If MSR_SPEC_CTRL is available, apply Xen's default setting and discard
diff --git a/xen/include/asm-x86/processor.h b/xen/include/asm-x86/processor.h
index 104faa9..2a76d90 100644
--- a/xen/include/asm-x86/processor.h
+++ b/xen/include/asm-x86/processor.h
@@ -568,9 +568,9 @@ int guest_wrmsr_xen(struct vcpu *v, uint32_t idx, uint64_t val);
void microcode_set_module(unsigned int);
int microcode_update(XEN_GUEST_HANDLE_PARAM(const_void), unsigned long len);
-int microcode_resume_cpu(void);
-int early_microcode_update_cpu(bool start_update);
+int early_microcode_update_cpu(void);
int early_microcode_init(void);
+int microcode_update_one(void);
int microcode_init_intel(void);
int microcode_init_amd(void);
--
1.8.3.1
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next prev parent reply other threads:[~2019-08-19 1:22 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-19 1:25 [Xen-devel] [PATCH v9 00/15] improve late microcode loading Chao Gao
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 01/15] microcode/intel: extend microcode_update_match() Chao Gao
2019-08-28 15:12 ` Jan Beulich
2019-08-29 7:15 ` Chao Gao
2019-08-29 7:14 ` Jan Beulich
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 02/15] microcode/amd: fix memory leak Chao Gao
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 03/15] microcode/amd: distinguish old and mismatched ucode in microcode_fits() Chao Gao
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 04/15] microcode: introduce a global cache of ucode patch Chao Gao
2019-08-22 11:11 ` Roger Pau Monné
2019-08-28 15:21 ` Jan Beulich
2019-08-29 10:18 ` Jan Beulich
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 05/15] microcode: clean up microcode_resume_cpu Chao Gao
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 06/15] microcode: remove struct ucode_cpu_info Chao Gao
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 07/15] microcode: remove pointless 'cpu' parameter Chao Gao
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 08/15] microcode/amd: call svm_host_osvw_init() in common code Chao Gao
2019-08-22 13:08 ` Roger Pau Monné
2019-08-28 15:26 ` Jan Beulich
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 09/15] microcode: pass a patch pointer to apply_microcode() Chao Gao
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 10/15] microcode: split out apply_microcode() from cpu_request_microcode() Chao Gao
2019-08-22 13:59 ` Roger Pau Monné
2019-08-29 10:06 ` Jan Beulich
2019-08-30 3:22 ` Chao Gao
2019-08-30 7:25 ` Jan Beulich
2019-08-29 10:19 ` Jan Beulich
2019-08-19 1:25 ` Chao Gao [this message]
2019-08-22 14:10 ` [Xen-devel] [PATCH v9 11/15] microcode: unify loading update during CPU resuming and AP wakeup Roger Pau Monné
2019-08-22 16:44 ` Chao Gao
2019-08-23 9:09 ` Roger Pau Monné
2019-08-29 7:37 ` Chao Gao
2019-08-29 8:16 ` Roger Pau Monné
2019-08-29 10:26 ` Jan Beulich
2019-08-29 10:29 ` Jan Beulich
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 12/15] microcode: reduce memory allocation and copy when creating a patch Chao Gao
2019-08-23 8:11 ` Roger Pau Monné
2019-08-26 7:03 ` Chao Gao
2019-08-26 8:11 ` Roger Pau Monné
2019-08-29 10:47 ` Jan Beulich
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 13/15] x86/microcode: Synchronize late microcode loading Chao Gao
2019-08-19 10:27 ` Sergey Dyasli
2019-08-19 14:49 ` Chao Gao
2019-08-29 12:06 ` Jan Beulich
2019-08-30 3:30 ` Chao Gao
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 14/15] microcode: remove microcode_update_lock Chao Gao
2019-08-19 1:25 ` [Xen-devel] [PATCH v9 15/15] microcode: block #NMI handling when loading an ucode Chao Gao
2019-08-23 8:46 ` Sergey Dyasli
2019-08-26 8:07 ` Chao Gao
2019-08-27 4:52 ` Chao Gao
2019-08-28 8:52 ` Sergey Dyasli
2019-08-29 12:11 ` Jan Beulich
2019-08-30 6:35 ` Chao Gao
2019-09-09 5:52 ` Chao Gao
2019-09-09 6:16 ` Jan Beulich
2019-08-29 12:22 ` Jan Beulich
2019-08-30 6:33 ` Chao Gao
2019-08-30 7:30 ` Jan Beulich
2019-08-22 7:51 ` [Xen-devel] [PATCH v9 00/15] improve late microcode loading Sergey Dyasli
2019-08-22 15:39 ` Chao Gao
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