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From: Roger Pau Monne <roger.pau@citrix.com>
To: <xen-devel@lists.xenproject.org>
Cc: Kevin Tian <kevin.tian@intel.com>,
	Jun Nakajima <jun.nakajima@intel.com>, Wei Liu <wl@xen.org>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	Jan Beulich <jbeulich@suse.com>,
	Roger Pau Monne <roger.pau@citrix.com>
Subject: [Xen-devel] [PATCH v2 1/4] Revert "x86/vvmx: fix virtual interrupt injection when Ack on exit control is used"
Date: Wed, 25 Mar 2020 11:19:07 +0100
Message-ID: <20200325101910.29168-2-roger.pau@citrix.com> (raw)
In-Reply-To: <20200325101910.29168-1-roger.pau@citrix.com>

This reverts commit f96e1469ad06b61796c60193daaeb9f8a96d7458.

The commit is wrong, as the whole point of nvmx_update_apicv is to
update the guest interrupt status field when the Ack on exit VMEXIT
control feature is enabled.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
---
 xen/arch/x86/hvm/vmx/vvmx.c | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index f049920196..1b8461ba30 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -1456,12 +1456,7 @@ static void virtual_vmexit(struct cpu_user_regs *regs)
     /* updating host cr0 to sync TS bit */
     __vmwrite(HOST_CR0, v->arch.hvm.vmx.host_cr0);
 
-    if ( cpu_has_vmx_virtual_intr_delivery &&
-         /*
-          * Only inject the vector if the Ack on exit bit is not set, else the
-          * interrupt will be signaled in the vmcs VM_EXIT_INTR_INFO field.
-          */
-         !(get_vvmcs(v, VM_EXIT_CONTROLS) & VM_EXIT_ACK_INTR_ON_EXIT) )
+    if ( cpu_has_vmx_virtual_intr_delivery )
         nvmx_update_apicv(v);
 
     nvcpu->nv_vmswitch_in_progress = 0;
-- 
2.26.0



  reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-25 10:19 [Xen-devel] [PATCH v2 0/4] x86/nvmx: fixes for interrupt injection Roger Pau Monne
2020-03-25 10:19 ` Roger Pau Monne [this message]
2020-03-25 10:19 ` [Xen-devel] [PATCH v2 2/4] x86/nvmx: only update SVI when using Ack on exit Roger Pau Monne
2020-03-26  2:48   ` Tian, Kevin
2020-03-25 10:19 ` [Xen-devel] [PATCH v2 3/4] x86/nvmx: split updating RVI from SVI in nvmx_update_apicv Roger Pau Monne
2020-03-26  3:13   ` Tian, Kevin
2020-03-26  9:19     ` Roger Pau Monné
2020-03-26  9:24       ` Tian, Kevin
2020-03-25 10:19 ` [Xen-devel] [PATCH v2 4/4] x86/nvmx: update exit bitmap when using virtual interrupt delivery Roger Pau Monne
2020-03-26  3:17   ` Tian, Kevin
2020-03-26  9:22     ` Roger Pau Monné
2020-03-26  9:26       ` Tian, Kevin

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