Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1708880
| From | tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [tip:x86/platform] x86/hyper-v: Introduce fast hypercall implementation |
| Date | 2017-08-10 18:50 +0200 |
| Message-ID | <ucYOM-8aT-63@gated-at.bofh.it> (permalink) |
| References | <ua4nG-3Eo-41@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Commit-ID: 6a8edbd0c54ae266b12f4f63e406313481c9d4bc
Gitweb: http://git.kernel.org/tip/6a8edbd0c54ae266b12f4f63e406313481c9d4bc
Author: Vitaly Kuznetsov <vkuznets@redhat.com>
AuthorDate: Wed, 2 Aug 2017 18:09:15 +0200
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Thu, 10 Aug 2017 16:50:22 +0200
x86/hyper-v: Introduce fast hypercall implementation
Hyper-V supports 'fast' hypercalls when all parameters are passed through
registers. Implement an inline version of a simpliest of these calls:
hypercall with one 8-byte input and no output.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Jork Loeser <Jork.Loeser@microsoft.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Simon Xiao <sixiao@microsoft.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: devel@linuxdriverproject.org
Link: http://lkml.kernel.org/r/20170802160921.21791-4-vkuznets@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/include/asm/mshyperv.h | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index 6fa5e34..e484255 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -209,6 +209,40 @@ static inline u64 hv_do_hypercall(u64 control, void *input, void *output)
return hv_status;
}
+#define HV_HYPERCALL_FAST_BIT BIT(16)
+
+/* Fast hypercall with 8 bytes of input and no output */
+static inline u64 hv_do_fast_hypercall8(u16 code, u64 input1)
+{
+ u64 hv_status, control = (u64)code | HV_HYPERCALL_FAST_BIT;
+ register void *__sp asm(_ASM_SP);
+
+#ifdef CONFIG_X86_64
+ {
+ __asm__ __volatile__("call *%4"
+ : "=a" (hv_status), "+r" (__sp),
+ "+c" (control), "+d" (input1)
+ : "m" (hv_hypercall_pg)
+ : "cc", "r8", "r9", "r10", "r11");
+ }
+#else
+ {
+ u32 input1_hi = upper_32_bits(input1);
+ u32 input1_lo = lower_32_bits(input1);
+
+ __asm__ __volatile__ ("call *%5"
+ : "=A"(hv_status),
+ "+c"(input1_lo),
+ "+r"(__sp)
+ : "A" (control),
+ "b" (input1_hi),
+ "m" (hv_hypercall_pg)
+ : "cc", "edi", "esi");
+ }
+#endif
+ return hv_status;
+}
+
void hyperv_init(void);
void hyperv_report_panic(struct pt_regs *regs);
bool hv_is_hypercall_page_setup(void);
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:10 +0200
[PATCH v10 1/9] x86/hyper-v: include hyperv/ only when CONFIG_HYPERV is set Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:10 +0200
[tip:x86/platform] x86/hyper-v: Include hyperv/ only when CONFIG_HYPERV is set tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[PATCH v10 3/9] x86/hyper-v: fast hypercall implementation Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:10 +0200
[tip:x86/platform] x86/hyper-v: Introduce fast hypercall implementation tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[PATCH v10 7/9] x86/hyper-v: use hypercall for remote TLB flush Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 20:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-10 21:00 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-10 21:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 11:10 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush "Kirill A. Shutemov" <kirill@shutemov.name> - 2017-08-11 13:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Linus Torvalds <torvalds@linux-foundation.org> - 2017-08-11 18:20 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 18:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-11 11:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 13:00 +0200
Re: [Xen-devel] [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Andrew Cooper <andrew.cooper3@citrix.com> - 2017-08-11 13:10 +0200
Re: [Xen-devel] [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 14:10 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Juergen Gross <jgross@suse.com> - 2017-08-11 14:30 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 14:40 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Juergen Gross <jgross@suse.com> - 2017-08-11 14:50 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 15:00 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Juergen Gross <jgross@suse.com> - 2017-08-11 15:10 +0200
Re: [tip:x86/platform] x86/hyper-v: Use hypercall for remote TLB flush Peter Zijlstra <peterz@infradead.org> - 2017-08-11 15:50 +0200
[PATCH v10 4/9] hyper-v: use fast hypercall for HVCALL_SIGNAL_EVENT Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[tip:x86/platform] hyper-v: Use fast hypercall for HVCALL_SIGNAL_EVENT tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[PATCH v10 5/9] x86/hyper-v: implement rep hypercalls Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[tip:x86/platform] x86/hyper-v: Implement rep hypercalls tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
[PATCH v10 8/9] x86/hyper-v: support extended CPU ranges for TLB flush hypercalls Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[PATCH v10 9/9] tracing/hyper-v: trace hyperv_mmu_flush_tlb_others() Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[PATCH v10 6/9] hyper-v: globalize vp_index Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-02 18:20 +0200
[tip:x86/platform] hyper-v: Globalize vp_index tip-bot for Vitaly Kuznetsov <tipbot@zytor.com> - 2017-08-10 18:50 +0200
Re: [PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-10 14:00 +0200
Re: [PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Ingo Molnar <mingo@kernel.org> - 2017-08-10 17:20 +0200
Re: [PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-10 17:20 +0200
Re: [PATCH v10 0/9] Hyper-V: paravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov <vkuznets@redhat.com> - 2017-08-10 19:10 +0200
csiph-web