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From: kys@linuxonhyperv.com
To: x86@kernel.org, gregkh@linuxfoundation.org,
	linux-kernel@vger.kernel.org, devel@linuxdriverproject.org,
	olaf@aepfle.de, apw@canonical.com, jasowang@redhat.com,
	tglx@linutronix.de, hpa@zytor.com, sthemmin@microsoft.com,
	Michael.H.Kelley@microsoft.com, vkuznets@redhat.com
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Subject: [PATCH V2 5/5] X86: Hyper-V: Consolidate the allocation of the hypercall input page
Date: Thu,  3 May 2018 23:08:23 -0700	[thread overview]
Message-ID: <20180504060823.3345-5-kys@linuxonhyperv.com> (raw)
In-Reply-To: <20180504060823.3345-1-kys@linuxonhyperv.com>

From: "K. Y. Srinivasan" <kys@microsoft.com>

Consolidate the allocation of the hypercall input page.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
---
 arch/x86/hyperv/hv_init.c       |  2 --
 arch/x86/hyperv/mmu.c           | 30 ++++++------------------------
 arch/x86/include/asm/mshyperv.h |  1 -
 3 files changed, 6 insertions(+), 27 deletions(-)

diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 6bc90d68ac8b..4c431e1c1eff 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -324,8 +324,6 @@ void __init hyperv_init(void)
 	hypercall_msr.guest_physical_address = vmalloc_to_pfn(hv_hypercall_pg);
 	wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);
 
-	hyper_alloc_mmu();
-
 	hv_apic_init();
 
 	/*
diff --git a/arch/x86/hyperv/mmu.c b/arch/x86/hyperv/mmu.c
index c9cd28f0bae4..5f053d7d1bd9 100644
--- a/arch/x86/hyperv/mmu.c
+++ b/arch/x86/hyperv/mmu.c
@@ -32,9 +32,6 @@ struct hv_flush_pcpu_ex {
 /* Each gva in gva_list encodes up to 4096 pages to flush */
 #define HV_TLB_FLUSH_UNIT (4096 * PAGE_SIZE)
 
-static struct hv_flush_pcpu __percpu **pcpu_flush;
-
-static struct hv_flush_pcpu_ex __percpu **pcpu_flush_ex;
 
 /*
  * Fills in gva_list starting from offset. Returns the number of items added.
@@ -77,7 +74,7 @@ static void hyperv_flush_tlb_others(const struct cpumask *cpus,
 
 	trace_hyperv_mmu_flush_tlb_others(cpus, info);
 
-	if (!pcpu_flush || !hv_hypercall_pg)
+	if (!hv_hypercall_pg)
 		goto do_native;
 
 	if (cpumask_empty(cpus))
@@ -85,10 +82,8 @@ static void hyperv_flush_tlb_others(const struct cpumask *cpus,
 
 	local_irq_save(flags);
 
-	flush_pcpu = this_cpu_ptr(pcpu_flush);
-
-	if (unlikely(!*flush_pcpu))
-		*flush_pcpu = page_address(alloc_page(GFP_ATOMIC));
+	flush_pcpu = (struct hv_flush_pcpu **)
+		     this_cpu_ptr(hyperv_pcpu_input_arg);
 
 	flush = *flush_pcpu;
 
@@ -164,7 +159,7 @@ static void hyperv_flush_tlb_others_ex(const struct cpumask *cpus,
 
 	trace_hyperv_mmu_flush_tlb_others(cpus, info);
 
-	if (!pcpu_flush_ex || !hv_hypercall_pg)
+	if (!hv_hypercall_pg)
 		goto do_native;
 
 	if (cpumask_empty(cpus))
@@ -172,10 +167,8 @@ static void hyperv_flush_tlb_others_ex(const struct cpumask *cpus,
 
 	local_irq_save(flags);
 
-	flush_pcpu = this_cpu_ptr(pcpu_flush_ex);
-
-	if (unlikely(!*flush_pcpu))
-		*flush_pcpu = page_address(alloc_page(GFP_ATOMIC));
+	flush_pcpu = (struct hv_flush_pcpu_ex **)
+		     this_cpu_ptr(hyperv_pcpu_input_arg);
 
 	flush = *flush_pcpu;
 
@@ -257,14 +250,3 @@ void hyperv_setup_mmu_ops(void)
 		pv_mmu_ops.flush_tlb_others = hyperv_flush_tlb_others_ex;
 	}
 }
-
-void hyper_alloc_mmu(void)
-{
-	if (!(ms_hyperv.hints & HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED))
-		return;
-
-	if (!(ms_hyperv.hints & HV_X64_EX_PROCESSOR_MASKS_RECOMMENDED))
-		pcpu_flush = alloc_percpu(struct hv_flush_pcpu *);
-	else
-		pcpu_flush_ex = alloc_percpu(struct hv_flush_pcpu_ex *);
-}
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index 0ee82519957b..9aaa493f5756 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -294,7 +294,6 @@ static inline int cpumask_to_vpset(struct hv_vpset *vpset,
 
 void __init hyperv_init(void);
 void hyperv_setup_mmu_ops(void);
-void hyper_alloc_mmu(void);
 void hyperv_report_panic(struct pt_regs *regs, long err);
 bool hv_is_hyperv_initialized(void);
 void hyperv_cleanup(void);
-- 
2.15.1

  parent reply	other threads:[~2018-05-04  6:08 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-04  6:06 [PATCH V2 0/5] X86: Hyper-V: APIC enlightenments kys
2018-05-04  6:08 ` [PATCH V2 1/5] X86: Hyper-V: Enlighten APIC access kys
2018-05-04  6:08   ` [PATCH V2 2/5] X86: Hyper-V: Enable IPI enlightenments kys
2018-05-05  0:06     ` kbuild test robot
2018-05-09 17:06     ` Michael Kelley (EOSG)
2018-05-04  6:08   ` [PATCH V2 3/5] X86: Hyper-V: Enhanced IPI enlightenment kys
2018-05-09 17:07     ` Michael Kelley (EOSG)
2018-05-04  6:08   ` [PATCH V2 4/5] X86: Hyper-V: Consolidate code for converting cpumask to vpset kys
2018-05-09 17:07     ` Michael Kelley (EOSG)
2018-05-04  6:08   ` kys [this message]
2018-05-09 17:08     ` [PATCH V2 5/5] X86: Hyper-V: Consolidate the allocation of the hypercall input page Michael Kelley (EOSG)
2018-05-04 23:36   ` [PATCH V2 1/5] X86: Hyper-V: Enlighten APIC access kbuild test robot
2018-05-09 17:05   ` Michael Kelley (EOSG)
2018-05-16 17:21 ` [PATCH V2 0/5] X86: Hyper-V: APIC enlightenments KY Srinivasan
2018-05-16 20:14   ` Thomas Gleixner

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