KVM Archive on lore.kernel.org
 help / color / Atom feed
From: David Woodhouse <dwmw2@infradead.org>
To: kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Ankur Arora <ankur.a.arora@oracle.com>,
	Joao Martins <joao.m.martins@oracle.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Sean Christopherson <seanjc@google.com>,
	graf@amazon.com, iaslan@amazon.de, pdurrant@amazon.com,
	aagch@amazon.com, fandree@amazon.com, hch@infradead.org
Subject: [PATCH v6 05/19] KVM: x86/xen: Move KVM_XEN_HVM_CONFIG handling to xen.c
Date: Wed,  3 Feb 2021 15:01:00 +0000
Message-ID: <20210203150114.920335-6-dwmw2@infradead.org> (raw)
In-Reply-To: <20210203150114.920335-1-dwmw2@infradead.org>

From: David Woodhouse <dwmw@amazon.co.uk>

This is already more complex than the simple memcpy it originally had.
Move it to xen.c with the rest of the Xen support.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
 arch/x86/kvm/x86.c | 14 +-------------
 arch/x86/kvm/xen.c | 18 ++++++++++++++++++
 arch/x86/kvm/xen.h |  1 +
 3 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 4b948c4cd48e..a74ae5f70bdc 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5607,19 +5607,7 @@ long kvm_arch_vm_ioctl(struct file *filp,
 		r = -EFAULT;
 		if (copy_from_user(&xhc, argp, sizeof(xhc)))
 			goto out;
-		r = -EINVAL;
-		if (xhc.flags & ~KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL)
-			goto out;
-		/*
-		 * With hypercall interception the kernel generates its own
-		 * hypercall page so it must not be provided.
-		 */
-		if ((xhc.flags & KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL) &&
-		    (xhc.blob_addr_32 || xhc.blob_addr_64 ||
-		     xhc.blob_size_32 || xhc.blob_size_64))
-			goto out;
-		memcpy(&kvm->arch.xen_hvm_config, &xhc, sizeof(xhc));
-		r = 0;
+		r = kvm_xen_hvm_config(kvm, &xhc);
 		break;
 	}
 	case KVM_SET_CLOCK: {
diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c
index 19bcb2bfba86..b52549fc6dbc 100644
--- a/arch/x86/kvm/xen.c
+++ b/arch/x86/kvm/xen.c
@@ -79,6 +79,24 @@ int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data)
 	return 0;
 }
 
+int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc)
+{
+	if (xhc->flags & ~KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL)
+		return -EINVAL;
+
+	/*
+	 * With hypercall interception the kernel generates its own
+	 * hypercall page so it must not be provided.
+	 */
+	if ((xhc->flags & KVM_XEN_HVM_CONFIG_INTERCEPT_HCALL) &&
+	    (xhc->blob_addr_32 || xhc->blob_addr_64 ||
+	     xhc->blob_size_32 || xhc->blob_size_64))
+		return -EINVAL;
+
+	memcpy(&kvm->arch.xen_hvm_config, xhc, sizeof(*xhc));
+	return 0;
+}
+
 static int kvm_xen_hypercall_set_result(struct kvm_vcpu *vcpu, u64 result)
 {
 	kvm_rax_write(vcpu, result);
diff --git a/arch/x86/kvm/xen.h b/arch/x86/kvm/xen.h
index 276ed59e476b..28e9c9892628 100644
--- a/arch/x86/kvm/xen.h
+++ b/arch/x86/kvm/xen.h
@@ -11,6 +11,7 @@
 
 int kvm_xen_hypercall(struct kvm_vcpu *vcpu);
 int kvm_xen_write_hypercall_page(struct kvm_vcpu *vcpu, u64 data);
+int kvm_xen_hvm_config(struct kvm *kvm, struct kvm_xen_hvm_config *xhc);
 
 static inline bool kvm_xen_hypercall_enabled(struct kvm *kvm)
 {
-- 
2.29.2


  parent reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-03 15:00 [PATCH v6 00/19] KVM: Add minimal support for Xen HVM guests David Woodhouse
2021-02-03 15:00 ` [PATCH v6 01/19] KVM: x86/xen: fix Xen hypercall page msr handling David Woodhouse
2021-02-03 15:00 ` [PATCH v6 02/19] KVM: x86/xen: Fix __user pointer handling for hypercall page installation David Woodhouse
2021-02-03 15:00 ` [PATCH v6 03/19] KVM: x86/xen: intercept xen hypercalls if enabled David Woodhouse
2021-02-03 15:00 ` [PATCH v6 04/19] KVM: x86/xen: Fix coexistence of Xen and Hyper-V hypercalls David Woodhouse
2021-02-03 15:01 ` David Woodhouse [this message]
2021-02-03 15:01 ` [PATCH v6 06/19] KVM: x86/xen: Add kvm_xen_enabled static key David Woodhouse
2021-02-03 15:01 ` [PATCH v6 07/19] KVM: x86/xen: add KVM_XEN_HVM_SET_ATTR/KVM_XEN_HVM_GET_ATTR David Woodhouse
2021-02-03 15:01 ` [PATCH v6 08/19] KVM: x86/xen: latch long_mode when hypercall page is set up David Woodhouse
2021-02-03 15:01 ` [PATCH v6 09/19] KVM: x86/xen: add definitions of compat_shared_info, compat_vcpu_info David Woodhouse
2021-02-03 15:01 ` [PATCH v6 10/19] KVM: x86/xen: register shared_info page David Woodhouse
2021-02-03 15:01 ` [PATCH v6 11/19] xen: add wc_sec_hi to struct shared_info David Woodhouse
2021-02-03 15:01 ` [PATCH v6 12/19] KVM: x86/xen: update wallclock region David Woodhouse
2021-02-03 15:01 ` [PATCH v6 13/19] KVM: x86/xen: Add KVM_XEN_VCPU_SET_ATTR/KVM_XEN_VCPU_GET_ATTR David Woodhouse
2021-02-03 15:01 ` [PATCH v6 14/19] KVM: x86/xen: register vcpu info David Woodhouse
2021-02-03 15:01 ` [PATCH v6 15/19] KVM: x86/xen: setup pvclock updates David Woodhouse
2021-02-03 15:01 ` [PATCH v6 16/19] KVM: x86/xen: register vcpu time info region David Woodhouse
2021-02-03 15:01 ` [PATCH v6 17/19] KVM: x86/xen: Add event channel interrupt vector upcall David Woodhouse
2021-02-03 15:01 ` [PATCH v6 18/19] KVM: x86: declare Xen HVM shared info capability and add test case David Woodhouse
2021-02-03 16:38   ` Paolo Bonzini
2021-02-03 17:55     ` David Woodhouse
2021-02-03 15:01 ` [PATCH v6 19/19] KVM: Add documentation for Xen hypercall and shared_info updates David Woodhouse
2021-02-03 16:17   ` Paolo Bonzini
2021-02-03 16:59 ` [PATCH v6 00/19] KVM: Add minimal support for Xen HVM guests Paolo Bonzini

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210203150114.920335-6-dwmw2@infradead.org \
    --to=dwmw2@infradead.org \
    --cc=aagch@amazon.com \
    --cc=ankur.a.arora@oracle.com \
    --cc=boris.ostrovsky@oracle.com \
    --cc=fandree@amazon.com \
    --cc=graf@amazon.com \
    --cc=hch@infradead.org \
    --cc=iaslan@amazon.de \
    --cc=joao.m.martins@oracle.com \
    --cc=kvm@vger.kernel.org \
    --cc=pbonzini@redhat.com \
    --cc=pdurrant@amazon.com \
    --cc=seanjc@google.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

KVM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/kvm/0 kvm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kvm kvm/ https://lore.kernel.org/kvm \
		kvm@vger.kernel.org
	public-inbox-index kvm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.kvm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git