From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: david.vrabel@citrix.com, konrad.wilk@oracle.com
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
xen-devel@lists.xenproject.org, mcgrof@suse.com,
linux-kernel@vger.kernel.org, roger.pau@citrix.com
Subject: [PATCH v2 06/11] xen/hvmlite: Prepare cpu_initialize_context() routine for HVMlite SMP
Date: Mon, 1 Feb 2016 10:38:52 -0500 [thread overview]
Message-ID: <1454341137-14110-7-git-send-email-boris.ostrovsky@oracle.com> (raw)
In-Reply-To: <1454341137-14110-1-git-send-email-boris.ostrovsky@oracle.com>
Subsequent patch will add support for starting secondary VCPUs in
HVMlite guest. This patch exists to simmplify code review.
No functional changes (except for introduction of 'if (!xen_hvmlite)').
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
arch/x86/xen/smp.c | 104 ++++++++++++++++++++++++++++-----------------------
1 files changed, 57 insertions(+), 47 deletions(-)
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 3f4ebf0..5fc4afb 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -390,70 +390,80 @@ cpu_initialize_context(unsigned int cpu, struct task_struct *idle)
if (cpumask_test_and_set_cpu(cpu, xen_cpu_initialized_map))
return 0;
- ctxt = kzalloc(sizeof(*ctxt), GFP_KERNEL);
- if (ctxt == NULL)
- return -ENOMEM;
+ if (!xen_hvmlite) {
- gdt = get_cpu_gdt_table(cpu);
+ ctxt = kzalloc(sizeof(*ctxt), GFP_KERNEL);
+ if (ctxt == NULL)
+ return -ENOMEM;
+
+ gdt = get_cpu_gdt_table(cpu);
#ifdef CONFIG_X86_32
- /* Note: PVH is not yet supported on x86_32. */
- ctxt->user_regs.fs = __KERNEL_PERCPU;
- ctxt->user_regs.gs = __KERNEL_STACK_CANARY;
+ /* Note: PVH is not yet supported on x86_32. */
+ ctxt->user_regs.fs = __KERNEL_PERCPU;
+ ctxt->user_regs.gs = __KERNEL_STACK_CANARY;
#endif
- memset(&ctxt->fpu_ctxt, 0, sizeof(ctxt->fpu_ctxt));
+ memset(&ctxt->fpu_ctxt, 0, sizeof(ctxt->fpu_ctxt));
- if (!xen_feature(XENFEAT_auto_translated_physmap)) {
- ctxt->user_regs.eip = (unsigned long)cpu_bringup_and_idle;
- ctxt->flags = VGCF_IN_KERNEL;
- ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */
- ctxt->user_regs.ds = __USER_DS;
- ctxt->user_regs.es = __USER_DS;
- ctxt->user_regs.ss = __KERNEL_DS;
+ if (!xen_feature(XENFEAT_auto_translated_physmap)) {
+ ctxt->user_regs.eip =
+ (unsigned long)cpu_bringup_and_idle;
+ ctxt->flags = VGCF_IN_KERNEL;
+ ctxt->user_regs.eflags = 0x1000; /* IOPL_RING1 */
+ ctxt->user_regs.ds = __USER_DS;
+ ctxt->user_regs.es = __USER_DS;
+ ctxt->user_regs.ss = __KERNEL_DS;
- xen_copy_trap_info(ctxt->trap_ctxt);
+ xen_copy_trap_info(ctxt->trap_ctxt);
- ctxt->ldt_ents = 0;
+ ctxt->ldt_ents = 0;
- BUG_ON((unsigned long)gdt & ~PAGE_MASK);
+ BUG_ON((unsigned long)gdt & ~PAGE_MASK);
- gdt_mfn = arbitrary_virt_to_mfn(gdt);
- make_lowmem_page_readonly(gdt);
- make_lowmem_page_readonly(mfn_to_virt(gdt_mfn));
+ gdt_mfn = arbitrary_virt_to_mfn(gdt);
+ make_lowmem_page_readonly(gdt);
+ make_lowmem_page_readonly(mfn_to_virt(gdt_mfn));
- ctxt->gdt_frames[0] = gdt_mfn;
- ctxt->gdt_ents = GDT_ENTRIES;
+ ctxt->gdt_frames[0] = gdt_mfn;
+ ctxt->gdt_ents = GDT_ENTRIES;
- ctxt->kernel_ss = __KERNEL_DS;
- ctxt->kernel_sp = idle->thread.sp0;
+ ctxt->kernel_ss = __KERNEL_DS;
+ ctxt->kernel_sp = idle->thread.sp0;
#ifdef CONFIG_X86_32
- ctxt->event_callback_cs = __KERNEL_CS;
- ctxt->failsafe_callback_cs = __KERNEL_CS;
+ ctxt->event_callback_cs = __KERNEL_CS;
+ ctxt->failsafe_callback_cs = __KERNEL_CS;
#else
- ctxt->gs_base_kernel = per_cpu_offset(cpu);
+ ctxt->gs_base_kernel = per_cpu_offset(cpu);
#endif
- ctxt->event_callback_eip =
- (unsigned long)xen_hypervisor_callback;
- ctxt->failsafe_callback_eip =
- (unsigned long)xen_failsafe_callback;
- ctxt->user_regs.cs = __KERNEL_CS;
- per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);
- }
+ ctxt->event_callback_eip =
+ (unsigned long)xen_hypervisor_callback;
+ ctxt->failsafe_callback_eip =
+ (unsigned long)xen_failsafe_callback;
+ ctxt->user_regs.cs = __KERNEL_CS;
+ per_cpu(xen_cr3, cpu) = __pa(swapper_pg_dir);
+ }
#ifdef CONFIG_XEN_PVH
- else {
- /*
- * The vcpu comes on kernel page tables which have the NX pte
- * bit set. This means before DS/SS is touched, NX in
- * EFER must be set. Hence the following assembly glue code.
- */
- ctxt->user_regs.eip = (unsigned long)xen_pvh_early_cpu_init;
- ctxt->user_regs.rdi = cpu;
- ctxt->user_regs.rsi = true; /* entry == true */
- }
+ else {
+ /*
+ * The vcpu comes on kernel page tables which have the
+ * NX pte bit set. This means before DS/SS is touched,
+ * NX in EFER must be set. Hence the following assembly
+ * glue code.
+ */
+ ctxt->user_regs.eip =
+ (unsigned long)xen_pvh_early_cpu_init;
+ ctxt->user_regs.rdi = cpu;
+ ctxt->user_regs.rsi = true; /* entry == true */
+ }
#endif
- ctxt->user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs);
- ctxt->ctrlreg[3] = xen_pfn_to_cr3(virt_to_gfn(swapper_pg_dir));
+ ctxt->user_regs.esp = idle->thread.sp0 - sizeof(struct pt_regs);
+ ctxt->ctrlreg[3] = xen_pfn_to_cr3(virt_to_gfn(swapper_pg_dir));
+ } else {
+ ctxt = NULL; /* To quiet down compiler */
+ BUG();
+ }
+
if (HYPERVISOR_vcpu_op(VCPUOP_initialise, cpu, ctxt))
BUG();
--
1.7.1
next prev parent reply other threads:[~2016-02-01 15:40 UTC|newest]
Thread overview: 54+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-01 15:38 [PATCH v2 00/11] HVMlite domU support Boris Ostrovsky
2016-02-01 15:38 ` [PATCH v2 01/11] xen/hvmlite: Import hvmlite-related Xen public interfaces Boris Ostrovsky
2016-02-02 16:06 ` David Vrabel
2016-02-01 15:38 ` [PATCH v2 02/11] xen/hvmlite: Bootstrap HVMlite guest Boris Ostrovsky
2016-02-02 16:39 ` David Vrabel
[not found] ` <56B0DBD6.3060205@citrix.com>
2016-02-02 17:19 ` Boris Ostrovsky
2016-02-03 18:55 ` Luis R. Rodriguez
[not found] ` <20160203185525.GV20964@wotan.suse.de>
2016-02-03 20:11 ` Boris Ostrovsky
2016-02-03 20:52 ` Andrew Cooper
[not found] ` <56B25F0C.2050808@oracle.com>
2016-02-03 23:40 ` Luis R. Rodriguez
[not found] ` <20160203234026.GS20964@wotan.suse.de>
2016-02-04 19:54 ` Boris Ostrovsky
[not found] ` <56B3AC67.7080704@oracle.com>
2016-02-04 20:57 ` Luis R. Rodriguez
[not found] ` <20160204205721.GJ12481@wotan.suse.de>
2016-02-04 22:28 ` Boris Ostrovsky
[not found] ` <56B268A2.5000704@citrix.com>
2016-02-03 23:59 ` Luis R. Rodriguez
[not found] ` <20160203235908.GT20964@wotan.suse.de>
2016-02-04 0:08 ` Luis R. Rodriguez
2016-02-04 0:51 ` Andrew Cooper
[not found] ` <56B2A09A.70404@citrix.com>
2016-02-04 23:10 ` Luis R. Rodriguez
[not found] ` <20160204231031.GM12481@wotan.suse.de>
2016-04-05 22:02 ` Luis R. Rodriguez
2016-04-24 20:23 ` Borislav Petkov
[not found] ` <20160424202314.GA3973@pd.tnic>
2016-04-25 13:21 ` Boris Ostrovsky
[not found] ` <571E19D7.1080301@oracle.com>
2016-04-25 13:47 ` Borislav Petkov
[not found] ` <20160425134749.GB28454@pd.tnic>
2016-04-25 13:54 ` Boris Ostrovsky
[not found] ` <571E219D.2090308@oracle.com>
2016-04-25 14:11 ` Borislav Petkov
[not found] ` <20160425141145.GE28454@pd.tnic>
2016-04-25 14:42 ` Boris Ostrovsky
[not found] ` <571E2CC7.7080907@oracle.com>
2016-04-25 15:22 ` Borislav Petkov
[not found] ` <20160425152209.GH28454@pd.tnic>
2016-04-25 15:48 ` Boris Ostrovsky
2016-04-26 10:53 ` Borislav Petkov
2016-04-25 17:24 ` David Vrabel
2016-02-01 15:38 ` [PATCH v2 03/11] xen/hvmlite: Initialize HVMlite kernel Boris Ostrovsky
2016-02-17 20:08 ` Luis R. Rodriguez
2016-02-01 15:38 ` [PATCH v2 04/11] xen/hvmlite: Allow HVMlite guests delay initializing grant table Boris Ostrovsky
2016-02-01 15:38 ` [PATCH v2 05/11] xen/hvmlite: HVMlite guests always have PV devices Boris Ostrovsky
2016-02-01 15:38 ` Boris Ostrovsky [this message]
2016-02-02 16:16 ` [PATCH v2 06/11] xen/hvmlite: Prepare cpu_initialize_context() routine for HVMlite SMP David Vrabel
2016-02-01 15:38 ` [PATCH v2 07/11] xen/hvmlite: Initialize context for secondary VCPUs Boris Ostrovsky
2016-02-02 16:21 ` David Vrabel
[not found] ` <56B0D786.7000002@citrix.com>
2016-02-02 16:58 ` Boris Ostrovsky
[not found] ` <56B0E046.6050900@oracle.com>
2016-02-04 10:07 ` David Vrabel
2016-02-04 12:58 ` Doug Goldstein
[not found] ` <56B34B01.50000@cardoe.com>
2016-02-04 19:08 ` Boris Ostrovsky
2016-02-01 15:38 ` [PATCH v2 08/11] xen/hvmlite: Extend APIC operations for HVMlite guests Boris Ostrovsky
2016-02-04 10:04 ` David Vrabel
[not found] ` <56B32220.4040505@citrix.com>
2016-02-04 12:14 ` Roger Pau Monné
[not found] ` <56B340B4.3050406@citrix.com>
2016-02-04 14:01 ` Boris Ostrovsky
2016-02-01 15:38 ` [PATCH v2 09/11] xen/hvmlite: Use x86's default timer init " Boris Ostrovsky
2016-02-02 16:27 ` David Vrabel
[not found] ` <56B0D8DD.5010206@citrix.com>
2016-02-02 17:01 ` Boris Ostrovsky
2016-02-01 15:38 ` [PATCH v2 10/11] xen/hvmlite: Boot secondary CPUs Boris Ostrovsky
2016-02-04 10:38 ` David Vrabel
[not found] ` <56B32A29.6050406@citrix.com>
2016-02-04 13:51 ` Boris Ostrovsky
2016-02-01 15:38 ` [PATCH v2 11/11] xen/hvmlite: Enable CPU on-/offlining Boris Ostrovsky
[not found] ` <1454341137-14110-5-git-send-email-boris.ostrovsky@oracle.com>
2016-02-02 16:13 ` [PATCH v2 04/11] xen/hvmlite: Allow HVMlite guests delay initializing grant table David Vrabel
[not found] ` <56B0D596.4050301@citrix.com>
2016-02-02 16:49 ` Boris Ostrovsky
2016-02-03 18:59 ` Luis R. Rodriguez
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