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From: "Jan Beulich" <JBeulich@suse.com>
To: xen-devel <xen-devel@lists.xenproject.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Wei Liu <wei.liu2@citrix.com>,
	Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Subject: [PATCH] x86/SVM: don't deliver #GP without error code
Date: Thu, 24 Nov 2016 07:13:42 -0700	[thread overview]
Message-ID: <583703A60200007800121BA7@prv-mh.provo.novell.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 2982 bytes --]

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -2029,7 +2029,7 @@ svm_vmexit_do_vmrun(struct cpu_user_regs
     if ( !nestedsvm_vmcb_map(v, vmcbaddr) )
     {
         gdprintk(XENLOG_ERR, "VMRUN: mapping vmcb failed, injecting #GP\n");
-        hvm_inject_hw_exception(TRAP_gp_fault, HVM_DELIVER_NO_ERROR_CODE);
+        hvm_inject_hw_exception(TRAP_gp_fault, 0);
         return;
     }
 
@@ -2068,7 +2068,6 @@ svm_vmexit_do_vmload(struct vmcb_struct
                      struct cpu_user_regs *regs,
                      struct vcpu *v, uint64_t vmcbaddr)
 {
-    int ret;
     unsigned int inst_len;
     struct page_info *page;
 
@@ -2078,8 +2077,8 @@ svm_vmexit_do_vmload(struct vmcb_struct
     if ( !nsvm_efer_svm_enabled(v) ) 
     {
         gdprintk(XENLOG_ERR, "VMLOAD: nestedhvm disabled, injecting #UD\n");
-        ret = TRAP_invalid_op;
-        goto inject;
+        hvm_inject_hw_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE);
+        return;
     }
 
     page = nsvm_get_nvmcb_page(v, vmcbaddr);
@@ -2087,8 +2086,8 @@ svm_vmexit_do_vmload(struct vmcb_struct
     {
         gdprintk(XENLOG_ERR,
             "VMLOAD: mapping failed, injecting #GP\n");
-        ret = TRAP_gp_fault;
-        goto inject;
+        hvm_inject_hw_exception(TRAP_gp_fault, 0);
+        return;
     }
 
     svm_vmload_pa(page_to_maddr(page));
@@ -2098,11 +2097,6 @@ svm_vmexit_do_vmload(struct vmcb_struct
     v->arch.hvm_svm.vmcb_in_sync = 0;
 
     __update_guest_eip(regs, inst_len);
-    return;
-
- inject:
-    hvm_inject_hw_exception(ret, HVM_DELIVER_NO_ERROR_CODE);
-    return;
 }
 
 static void
@@ -2110,7 +2104,6 @@ svm_vmexit_do_vmsave(struct vmcb_struct
                      struct cpu_user_regs *regs,
                      struct vcpu *v, uint64_t vmcbaddr)
 {
-    int ret;
     unsigned int inst_len;
     struct page_info *page;
 
@@ -2120,8 +2113,8 @@ svm_vmexit_do_vmsave(struct vmcb_struct
     if ( !nsvm_efer_svm_enabled(v) ) 
     {
         gdprintk(XENLOG_ERR, "VMSAVE: nestedhvm disabled, injecting #UD\n");
-        ret = TRAP_invalid_op;
-        goto inject;
+        hvm_inject_hw_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE);
+        return;
     }
 
     page = nsvm_get_nvmcb_page(v, vmcbaddr);
@@ -2129,18 +2122,13 @@ svm_vmexit_do_vmsave(struct vmcb_struct
     {
         gdprintk(XENLOG_ERR,
             "VMSAVE: mapping vmcb failed, injecting #GP\n");
-        ret = TRAP_gp_fault;
-        goto inject;
+        hvm_inject_hw_exception(TRAP_gp_fault, 0);
+        return;
     }
 
     svm_vmsave_pa(page_to_maddr(page));
     put_page(page);
     __update_guest_eip(regs, inst_len);
-    return;
-
- inject:
-    hvm_inject_hw_exception(ret, HVM_DELIVER_NO_ERROR_CODE);
-    return;
 }
 
 static int svm_is_erratum_383(struct cpu_user_regs *regs)




[-- Attachment #2: SVM-GP-error-code.patch --]
[-- Type: text/plain, Size: 3025 bytes --]

x86/SVM: don't deliver #GP without error code

Signed-off-by: Jan Beulich <jbeulich@suse.com>

--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -2029,7 +2029,7 @@ svm_vmexit_do_vmrun(struct cpu_user_regs
     if ( !nestedsvm_vmcb_map(v, vmcbaddr) )
     {
         gdprintk(XENLOG_ERR, "VMRUN: mapping vmcb failed, injecting #GP\n");
-        hvm_inject_hw_exception(TRAP_gp_fault, HVM_DELIVER_NO_ERROR_CODE);
+        hvm_inject_hw_exception(TRAP_gp_fault, 0);
         return;
     }
 
@@ -2068,7 +2068,6 @@ svm_vmexit_do_vmload(struct vmcb_struct
                      struct cpu_user_regs *regs,
                      struct vcpu *v, uint64_t vmcbaddr)
 {
-    int ret;
     unsigned int inst_len;
     struct page_info *page;
 
@@ -2078,8 +2077,8 @@ svm_vmexit_do_vmload(struct vmcb_struct
     if ( !nsvm_efer_svm_enabled(v) ) 
     {
         gdprintk(XENLOG_ERR, "VMLOAD: nestedhvm disabled, injecting #UD\n");
-        ret = TRAP_invalid_op;
-        goto inject;
+        hvm_inject_hw_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE);
+        return;
     }
 
     page = nsvm_get_nvmcb_page(v, vmcbaddr);
@@ -2087,8 +2086,8 @@ svm_vmexit_do_vmload(struct vmcb_struct
     {
         gdprintk(XENLOG_ERR,
             "VMLOAD: mapping failed, injecting #GP\n");
-        ret = TRAP_gp_fault;
-        goto inject;
+        hvm_inject_hw_exception(TRAP_gp_fault, 0);
+        return;
     }
 
     svm_vmload_pa(page_to_maddr(page));
@@ -2098,11 +2097,6 @@ svm_vmexit_do_vmload(struct vmcb_struct
     v->arch.hvm_svm.vmcb_in_sync = 0;
 
     __update_guest_eip(regs, inst_len);
-    return;
-
- inject:
-    hvm_inject_hw_exception(ret, HVM_DELIVER_NO_ERROR_CODE);
-    return;
 }
 
 static void
@@ -2110,7 +2104,6 @@ svm_vmexit_do_vmsave(struct vmcb_struct
                      struct cpu_user_regs *regs,
                      struct vcpu *v, uint64_t vmcbaddr)
 {
-    int ret;
     unsigned int inst_len;
     struct page_info *page;
 
@@ -2120,8 +2113,8 @@ svm_vmexit_do_vmsave(struct vmcb_struct
     if ( !nsvm_efer_svm_enabled(v) ) 
     {
         gdprintk(XENLOG_ERR, "VMSAVE: nestedhvm disabled, injecting #UD\n");
-        ret = TRAP_invalid_op;
-        goto inject;
+        hvm_inject_hw_exception(TRAP_invalid_op, HVM_DELIVER_NO_ERROR_CODE);
+        return;
     }
 
     page = nsvm_get_nvmcb_page(v, vmcbaddr);
@@ -2129,18 +2122,13 @@ svm_vmexit_do_vmsave(struct vmcb_struct
     {
         gdprintk(XENLOG_ERR,
             "VMSAVE: mapping vmcb failed, injecting #GP\n");
-        ret = TRAP_gp_fault;
-        goto inject;
+        hvm_inject_hw_exception(TRAP_gp_fault, 0);
+        return;
     }
 
     svm_vmsave_pa(page_to_maddr(page));
     put_page(page);
     __update_guest_eip(regs, inst_len);
-    return;
-
- inject:
-    hvm_inject_hw_exception(ret, HVM_DELIVER_NO_ERROR_CODE);
-    return;
 }
 
 static int svm_is_erratum_383(struct cpu_user_regs *regs)

[-- Attachment #3: Type: text/plain, Size: 127 bytes --]

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             reply	other threads:[~2016-11-24 14:13 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-24 14:13 Jan Beulich [this message]
2016-11-24 14:19 ` [PATCH] x86/SVM: don't deliver #GP without error code Andrew Cooper
2016-11-24 14:33   ` Jan Beulich
2016-11-24 14:36     ` Wei Liu
2016-11-24 14:37     ` Andrew Cooper
2016-11-24 15:40 ` [PATCH for-4.8 1/2] x86/emul: Don't deliver #UD with an " Andrew Cooper
2016-11-24 15:40   ` [PATCH for-4.8 2/2] x86/vmx: Don't deliver #MC " Andrew Cooper
2016-11-24 15:45     ` Wei Liu
2016-11-24 16:08     ` Jan Beulich
2016-11-25  0:04     ` Tian, Kevin
2016-11-24 15:45   ` [PATCH for-4.8 1/2] x86/emul: Don't deliver #UD " Wei Liu
2016-11-24 16:08   ` Jan Beulich
2016-11-28 13:45 ` [PATCH] x86/SVM: don't deliver #GP without " Boris Ostrovsky

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