From: Zhenzhong Duan <zhenzhong.duan@oracle.com>
To: linux-kernel@vger.kernel.org
Cc: xen-devel@lists.xenproject.org, boris.ostrovsky@oracle.com,
jgross@suse.com, sstabellini@kernel.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de,
Zhenzhong Duan <zhenzhong.duan@oracle.com>
Subject: [PATCH v4 3/5] Revert "xen: Introduce 'xen_nopv' to disable PV extensions for HVM guests."
Date: Mon, 1 Jul 2019 13:19:57 +0800 [thread overview]
Message-ID: <1561958399-28906-4-git-send-email-zhenzhong.duan@oracle.com> (raw)
In-Reply-To: <1561958399-28906-1-git-send-email-zhenzhong.duan@oracle.com>
This reverts commit 8d693b911bb9c57009c24cb1772d205b84c7985c.
Instead we use an unified parameter 'nopv' for all the hypervisor
platforms.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
---
Documentation/admin-guide/kernel-parameters.txt | 4 ----
arch/x86/xen/enlighten_hvm.c | 12 +-----------
2 files changed, 1 insertion(+), 15 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 21e08af..d5c3dcc 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -5251,10 +5251,6 @@
Disables the ticketlock slowpath using Xen PV
optimizations.
- xen_nopv [X86]
- Disables the PV optimizations forcing the HVM guest to
- run as generic HVM guest with no PV drivers.
-
xen_scrub_pages= [XEN]
Boolean option to control scrubbing pages before giving them back
to Xen, for use by other domains. Can be also changed at runtime
diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c
index ac4943c..7fcb4ea 100644
--- a/arch/x86/xen/enlighten_hvm.c
+++ b/arch/x86/xen/enlighten_hvm.c
@@ -210,18 +210,8 @@ static void __init xen_hvm_guest_init(void)
#endif
}
-static bool xen_nopv;
-static __init int xen_parse_nopv(char *arg)
-{
- xen_nopv = true;
- return 0;
-}
-early_param("xen_nopv", xen_parse_nopv);
-
bool __init xen_hvm_need_lapic(void)
{
- if (xen_nopv)
- return false;
if (xen_pv_domain())
return false;
if (!xen_hvm_domain())
@@ -233,7 +223,7 @@ bool __init xen_hvm_need_lapic(void)
static uint32_t __init xen_platform_hvm(void)
{
- if (xen_pv_domain() || xen_nopv)
+ if (xen_pv_domain())
return 0;
return xen_cpuid_base();
--
1.8.3.1
next prev parent reply other threads:[~2019-07-02 5:17 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-01 5:19 [PATCH v4 0/5] misc fixes to PV extentions code Zhenzhong Duan
2019-07-01 5:19 ` [PATCH v4 1/5] x86/xen: Mark xen_hvm_need_lapic() and xen_x2apic_para_available() as __init Zhenzhong Duan
2019-07-01 5:19 ` [PATCH v4 2/5] x86: Add nopv parameter to disable PV extensions Zhenzhong Duan
2019-07-02 17:47 ` Boris Ostrovsky
2019-07-01 5:19 ` Zhenzhong Duan [this message]
2019-07-01 5:19 ` [PATCH v4 4/5] x86/xen: Add 'nopv' support for HVM guest Zhenzhong Duan
2019-07-02 18:04 ` Boris Ostrovsky
2019-07-01 5:19 ` [PATCH v4 5/5] xen: Add 'xen_nopv' parameter back for backward compatibility Zhenzhong Duan
2019-07-02 18:13 ` Boris Ostrovsky
2019-07-03 2:14 ` Zhenzhong Duan
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