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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 4/4] x86/nvmx: update exit bitmap when using virtual interrupt delivery
Date: Wed, 25 Mar 2020 11:19:10 +0100
Message-ID: <20200325101910.29168-5-roger.pau@citrix.com> (raw)
In-Reply-To: <20200325101910.29168-1-roger.pau@citrix.com>

Force an update of the EOI exit bitmap in nvmx_update_apicv, because
the one performed in vmx_intr_assist might not be reached if the
interrupt is intercepted by nvmx_intr_intercept returning true.

Extract the code to update the exit bitmap from vmx_intr_assist into a
helper and use it in nvmx_update_apicv.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
---
Changes since v1:
 - Reword commit message.
---
 xen/arch/x86/hvm/vmx/intr.c       | 21 +++++++++++++--------
 xen/arch/x86/hvm/vmx/vvmx.c       |  2 ++
 xen/include/asm-x86/hvm/vmx/vmx.h |  2 ++
 3 files changed, 17 insertions(+), 8 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/intr.c b/xen/arch/x86/hvm/vmx/intr.c
index 49a1295f09..000e14af49 100644
--- a/xen/arch/x86/hvm/vmx/intr.c
+++ b/xen/arch/x86/hvm/vmx/intr.c
@@ -224,6 +224,18 @@ static int nvmx_intr_intercept(struct vcpu *v, struct hvm_intack intack)
     return 0;
 }
 
+void vmx_sync_exit_bitmap(struct vcpu *v)
+{
+    const unsigned int n = ARRAY_SIZE(v->arch.hvm.vmx.eoi_exit_bitmap);
+    unsigned int i;
+
+    while ( (i = find_first_bit(&v->arch.hvm.vmx.eoi_exitmap_changed, n)) < n )
+    {
+        clear_bit(i, &v->arch.hvm.vmx.eoi_exitmap_changed);
+        __vmwrite(EOI_EXIT_BITMAP(i), v->arch.hvm.vmx.eoi_exit_bitmap[i]);
+    }
+}
+
 void vmx_intr_assist(void)
 {
     struct hvm_intack intack;
@@ -318,7 +330,6 @@ void vmx_intr_assist(void)
               intack.source != hvm_intsrc_vector )
     {
         unsigned long status;
-        unsigned int i, n;
 
        /*
         * intack.vector is the highest priority vector. So we set eoi_exit_bitmap
@@ -379,13 +390,7 @@ void vmx_intr_assist(void)
                     intack.vector;
         __vmwrite(GUEST_INTR_STATUS, status);
 
-        n = ARRAY_SIZE(v->arch.hvm.vmx.eoi_exit_bitmap);
-        while ( (i = find_first_bit(&v->arch.hvm.vmx.eoi_exitmap_changed,
-                                    n)) < n )
-        {
-            clear_bit(i, &v->arch.hvm.vmx.eoi_exitmap_changed);
-            __vmwrite(EOI_EXIT_BITMAP(i), v->arch.hvm.vmx.eoi_exit_bitmap[i]);
-        }
+        vmx_sync_exit_bitmap(v);
 
         pt_intr_post(v, intack);
     }
diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index 8431c912a1..845dd87f75 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -1418,6 +1418,8 @@ static void nvmx_update_apicv(struct vcpu *v)
         status |= rvi & VMX_GUEST_INTR_STATUS_SUBFIELD_BITMASK;
         __vmwrite(GUEST_INTR_STATUS, status);
     }
+
+    vmx_sync_exit_bitmap(v);
 }
 
 static void virtual_vmexit(struct cpu_user_regs *regs)
diff --git a/xen/include/asm-x86/hvm/vmx/vmx.h b/xen/include/asm-x86/hvm/vmx/vmx.h
index b334e1ec94..111ccd7e61 100644
--- a/xen/include/asm-x86/hvm/vmx/vmx.h
+++ b/xen/include/asm-x86/hvm/vmx/vmx.h
@@ -610,6 +610,8 @@ void update_guest_eip(void);
 void vmx_pi_per_cpu_init(unsigned int cpu);
 void vmx_pi_desc_fixup(unsigned int cpu);
 
+void vmx_sync_exit_bitmap(struct vcpu *v);
+
 #ifdef CONFIG_HVM
 void vmx_pi_hooks_assign(struct domain *d);
 void vmx_pi_hooks_deassign(struct domain *d);
-- 
2.26.0



  parent 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 ` [Xen-devel] [PATCH v2 1/4] Revert "x86/vvmx: fix virtual interrupt injection when Ack on exit control is used" Roger Pau Monne
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 ` Roger Pau Monne [this message]
2020-03-26  3:17   ` [Xen-devel] [PATCH v2 4/4] x86/nvmx: update exit bitmap when using virtual interrupt delivery Tian, Kevin
2020-03-26  9:22     ` Roger Pau Monné
2020-03-26  9:26       ` Tian, Kevin

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