From: Pavel Tatashin <pasha.tatashin@oracle.com>
To: steven.sistare@oracle.com, daniel.m.jordan@oracle.com,
linux@armlinux.org.uk, schwidefsky@de.ibm.com,
heiko.carstens@de.ibm.com, john.stultz@linaro.org,
sboyd@codeaurora.org, x86@kernel.org,
linux-kernel@vger.kernel.org, mingo@redhat.com,
tglx@linutronix.de, hpa@zytor.com, douly.fnst@cn.fujitsu.com,
peterz@infradead.org, prarit@redhat.com, feng.tang@intel.com,
pmladek@suse.com, gnomes@lxorguk.ukuu.org.uk,
linux-s390@vger.kernel.org, pasha.tatashin@oracle.com,
boris.ostrovsky@oracle.com, jgross@suse.com
Subject: [PATCH v13 06/18] x86/xen/time: initialize pv xen time in init_hypervisor_platform
Date: Wed, 11 Jul 2018 20:04:07 -0400 [thread overview]
Message-ID: <20180712000419.5165-7-pasha.tatashin@oracle.com> (raw)
In-Reply-To: <20180712000419.5165-1-pasha.tatashin@oracle.com>
In every hypervisor except for xen pv time ops are initialized in
init_hypervisor_platform().
Xen PV domains initialize time ops in x86_init.paging.pagetable_init(),
by calling xen_setup_shared_info() which is a poor design, as time is
needed prior to memory allocator.
xen_setup_shared_info() is called from two places: during boot, and
after suspend. Split the content of xen_setup_shared_info() into
three places:
1. add the clock relavent data into new xen pv init_platform vector, and
set clock ops in there.
2. move xen_setup_vcpu_info_placement() to new xen_pv_guest_late_init()
call.
3. Re-initializing parts of shared info copy to xen_pv_post_suspend() to
be symmetric to xen_pv_pre_suspend
Also, remove code duplications by calling xen_init_time_ops() from
xen_hvm_init_time_ops().
Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com>
---
arch/x86/xen/enlighten_pv.c | 51 +++++++++++++++++--------------------
arch/x86/xen/mmu_pv.c | 6 ++---
arch/x86/xen/suspend_pv.c | 5 ++--
arch/x86/xen/time.c | 14 +++-------
arch/x86/xen/xen-ops.h | 6 ++---
5 files changed, 35 insertions(+), 47 deletions(-)
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 8d4e2e1ae60b..615ad0f16848 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -119,6 +119,27 @@ static void __init xen_banner(void)
version >> 16, version & 0xffff, extra.extraversion,
xen_feature(XENFEAT_mmu_pt_update_preserve_ad) ? " (preserve-AD)" : "");
}
+
+static void __init xen_pv_init_platform(void)
+{
+ set_fixmap(FIX_PARAVIRT_BOOTMAP, xen_start_info->shared_info);
+ HYPERVISOR_shared_info = (void *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
+
+ /* xen clock uses per-cpu vcpu_info, need to init it for boot cpu */
+ xen_vcpu_info_reset(0);
+
+ /* pvclock is in shared info area */
+ xen_init_time_ops();
+}
+
+static void __init xen_pv_guest_late_init(void)
+{
+#ifndef CONFIG_SMP
+ /* Setup shared vcpu info for non-smp configurations */
+ xen_setup_vcpu_info_placement();
+#endif
+}
+
/* Check if running on Xen version (major, minor) or later */
bool
xen_running_on_version_or_later(unsigned int major, unsigned int minor)
@@ -947,34 +968,8 @@ static void xen_write_msr(unsigned int msr, unsigned low, unsigned high)
xen_write_msr_safe(msr, low, high);
}
-void xen_setup_shared_info(void)
-{
- set_fixmap(FIX_PARAVIRT_BOOTMAP, xen_start_info->shared_info);
-
- HYPERVISOR_shared_info =
- (struct shared_info *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
-
- xen_setup_mfn_list_list();
-
- if (system_state == SYSTEM_BOOTING) {
-#ifndef CONFIG_SMP
- /*
- * In UP this is as good a place as any to set up shared info.
- * Limit this to boot only, at restore vcpu setup is done via
- * xen_vcpu_restore().
- */
- xen_setup_vcpu_info_placement();
-#endif
- /*
- * Now that shared info is set up we can start using routines
- * that point to pvclock area.
- */
- xen_init_time_ops();
- }
-}
-
/* This is called once we have the cpu_possible_mask */
-void __ref xen_setup_vcpu_info_placement(void)
+void __init xen_setup_vcpu_info_placement(void)
{
int cpu;
@@ -1220,6 +1215,8 @@ asmlinkage __visible void __init xen_start_kernel(void)
x86_init.irqs.intr_mode_init = x86_init_noop;
x86_init.oem.arch_setup = xen_arch_setup;
x86_init.oem.banner = xen_banner;
+ x86_init.hyper.init_platform = xen_pv_init_platform;
+ x86_init.hyper.guest_late_init = xen_pv_guest_late_init;
/*
* Set up some pagetable state before starting to set any ptes.
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c
index 2c30cabfda90..52206ad81e4b 100644
--- a/arch/x86/xen/mmu_pv.c
+++ b/arch/x86/xen/mmu_pv.c
@@ -1230,8 +1230,7 @@ static void __init xen_pagetable_p2m_free(void)
* We roundup to the PMD, which means that if anybody at this stage is
* using the __ka address of xen_start_info or
* xen_start_info->shared_info they are in going to crash. Fortunatly
- * we have already revectored in xen_setup_kernel_pagetable and in
- * xen_setup_shared_info.
+ * we have already revectored in xen_setup_kernel_pagetable.
*/
size = roundup(size, PMD_SIZE);
@@ -1292,8 +1291,7 @@ static void __init xen_pagetable_init(void)
/* Remap memory freed due to conflicts with E820 map */
xen_remap_memory();
-
- xen_setup_shared_info();
+ xen_setup_mfn_list_list();
}
static void xen_write_cr2(unsigned long cr2)
{
diff --git a/arch/x86/xen/suspend_pv.c b/arch/x86/xen/suspend_pv.c
index a2e0f110af56..8303b58c79a9 100644
--- a/arch/x86/xen/suspend_pv.c
+++ b/arch/x86/xen/suspend_pv.c
@@ -27,8 +27,9 @@ void xen_pv_pre_suspend(void)
void xen_pv_post_suspend(int suspend_cancelled)
{
xen_build_mfn_list_list();
-
- xen_setup_shared_info();
+ set_fixmap(FIX_PARAVIRT_BOOTMAP, xen_start_info->shared_info);
+ HYPERVISOR_shared_info = (void *)fix_to_virt(FIX_PARAVIRT_BOOTMAP);
+ xen_setup_mfn_list_list();
if (suspend_cancelled) {
xen_start_info->store_mfn =
diff --git a/arch/x86/xen/time.c b/arch/x86/xen/time.c
index e0f1bcf01d63..2ad61bf896d6 100644
--- a/arch/x86/xen/time.c
+++ b/arch/x86/xen/time.c
@@ -40,7 +40,7 @@ static unsigned long xen_tsc_khz(void)
return pvclock_tsc_khz(info);
}
-u64 xen_clocksource_read(void)
+static u64 xen_clocksource_read(void)
{
struct pvclock_vcpu_time_info *src;
u64 ret;
@@ -503,7 +503,7 @@ static void __init xen_time_init(void)
pvclock_gtod_register_notifier(&xen_pvclock_gtod_notifier);
}
-void __ref xen_init_time_ops(void)
+void __init xen_init_time_ops(void)
{
pv_time_ops = xen_time_ops;
@@ -542,17 +542,11 @@ void __init xen_hvm_init_time_ops(void)
return;
if (!xen_feature(XENFEAT_hvm_safe_pvclock)) {
- printk(KERN_INFO "Xen doesn't support pvclock on HVM,"
- "disable pv timer\n");
+ pr_info("Xen doesn't support pvclock on HVM, disable pv timer");
return;
}
-
- pv_time_ops = xen_time_ops;
+ xen_init_time_ops();
x86_init.timers.setup_percpu_clockev = xen_time_init;
x86_cpuinit.setup_percpu_clockev = xen_hvm_setup_cpu_clockevents;
-
- x86_platform.calibrate_tsc = xen_tsc_khz;
- x86_platform.get_wallclock = xen_get_wallclock;
- x86_platform.set_wallclock = xen_set_wallclock;
}
#endif
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 3b34745d0a52..e78684597f57 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -31,7 +31,6 @@ extern struct shared_info xen_dummy_shared_info;
extern struct shared_info *HYPERVISOR_shared_info;
void xen_setup_mfn_list_list(void);
-void xen_setup_shared_info(void);
void xen_build_mfn_list_list(void);
void xen_setup_machphys_mapping(void);
void xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn);
@@ -68,12 +67,11 @@ void xen_init_irq_ops(void);
void xen_setup_timer(int cpu);
void xen_setup_runstate_info(int cpu);
void xen_teardown_timer(int cpu);
-u64 xen_clocksource_read(void);
void xen_setup_cpu_clockevents(void);
void xen_save_time_memory_area(void);
void xen_restore_time_memory_area(void);
-void __ref xen_init_time_ops(void);
-void __init xen_hvm_init_time_ops(void);
+void xen_init_time_ops(void);
+void xen_hvm_init_time_ops(void);
irqreturn_t xen_debug_interrupt(int irq, void *dev_id);
--
2.18.0
next prev parent reply other threads:[~2018-07-12 0:07 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-12 0:04 [PATCH v13 00/18] Early boot time stamps Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 01/18] x86: text_poke() may access uninitialized struct pages Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 02/18] x86: initialize static branching early Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 03/18] x86/CPU: Call detect_nopl() only on the BSP Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 04/18] x86/tsc: redefine notsc to behave as tsc=unstable Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 05/18] kvm/x86: remove kvm memblock dependency Pavel Tatashin
2018-07-12 0:04 ` Pavel Tatashin [this message]
2018-07-13 1:57 ` [PATCH v13 06/18] x86/xen/time: initialize pv xen time in init_hypervisor_platform Pavel Tatashin
2018-07-17 15:28 ` Boris Ostrovsky
2018-07-18 1:38 ` Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 07/18] x86/xen/time: output xen sched_clock time from 0 Pavel Tatashin
2018-07-17 15:43 ` Boris Ostrovsky
2018-07-18 1:59 ` Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 08/18] s390/time: add read_persistent_wall_and_boot_offset() Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 09/18] time: replace read_boot_clock64() with read_persistent_wall_and_boot_offset() Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 10/18] time: default boot time offset to local_clock() Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 11/18] s390/time: remove read_boot_clock64() Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 12/18] ARM/time: " Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 13/18] x86/tsc: calibrate tsc only once Pavel Tatashin
2018-07-13 7:22 ` Dou Liyang
2018-07-13 11:30 ` Pavel Tatashin
2018-07-16 9:32 ` Dou Liyang
2018-07-16 13:35 ` Pavel Tatashin
2018-07-17 8:59 ` Dou Liyang
2018-07-17 14:36 ` Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 14/18] x86/tsc: initialize cyc2ns when tsc freq. is determined Pavel Tatashin
2018-07-13 9:11 ` Dou Liyang
2018-07-13 11:39 ` Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 15/18] x86/tsc: use tsc early Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 16/18] sched: move sched clock initialization and merge with generic clock Pavel Tatashin
2018-07-12 23:50 ` kbuild test robot
2018-07-12 0:04 ` [PATCH v13 17/18] sched: early boot clock Pavel Tatashin
2018-07-12 0:04 ` [PATCH v13 18/18] sched: use static key for sched_clock_running Pavel Tatashin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20180712000419.5165-7-pasha.tatashin@oracle.com \
--to=pasha.tatashin@oracle.com \
--cc=boris.ostrovsky@oracle.com \
--cc=daniel.m.jordan@oracle.com \
--cc=douly.fnst@cn.fujitsu.com \
--cc=feng.tang@intel.com \
--cc=gnomes@lxorguk.ukuu.org.uk \
--cc=heiko.carstens@de.ibm.com \
--cc=hpa@zytor.com \
--cc=jgross@suse.com \
--cc=john.stultz@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=pmladek@suse.com \
--cc=prarit@redhat.com \
--cc=sboyd@codeaurora.org \
--cc=schwidefsky@de.ibm.com \
--cc=steven.sistare@oracle.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).