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From 11f30b4e8f2e939fe2cb061e8ae70d77ef582b63 Mon Sep 17 00:00:00 2001
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From: Laszlo Ersek <lersek@redhat.com>
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Date: Sat, 11 Jan 2014 17:59:56 +0100
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Subject: [PATCH 06/22] kvm: add kvm_readonly_mem_enabled
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RH-Author: Laszlo Ersek <lersek@redhat.com>
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Message-id: <1389463208-6278-7-git-send-email-lersek@redhat.com>
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Patchwork-id: 56620
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O-Subject: [RHEL-7.0 qemu-kvm PATCH 06/18] kvm: add kvm_readonly_mem_enabled
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Bugzilla: 1032346
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Amos Kong <akong@redhat.com>
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RH-Acked-by: Andrew Jones <drjones@redhat.com>
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From: Jordan Justen <jordan.l.justen@intel.com>
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Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
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Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
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Message-id: 1369816047-16384-3-git-send-email-jordan.l.justen@intel.com
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Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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(cherry picked from commit df9c8b758a04825e23f82427001028342b92d0cf)
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Signed-off-by: Laszlo Ersek <lersek@redhat.com>
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---
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include/sysemu/kvm.h | 10 ++++++++++
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kvm-all.c | 6 ++++++
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kvm-stub.c | 1 +
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3 files changed, 17 insertions(+)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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include/sysemu/kvm.h | 10 ++++++++++
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kvm-all.c | 6 ++++++
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kvm-stub.c | 1 +
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3 files changed, 17 insertions(+), 0 deletions(-)
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diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
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index 7fc3844..e722027 100644
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--- a/include/sysemu/kvm.h
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+++ b/include/sysemu/kvm.h
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@@ -45,6 +45,7 @@ extern bool kvm_async_interrupts_allowed;
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extern bool kvm_irqfds_allowed;
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extern bool kvm_msi_via_irqfd_allowed;
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extern bool kvm_gsi_routing_allowed;
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+extern bool kvm_readonly_mem_allowed;
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#if defined CONFIG_KVM || !defined NEED_CPU_H
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#define kvm_enabled() (kvm_allowed)
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@@ -97,6 +98,14 @@ extern bool kvm_gsi_routing_allowed;
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*/
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#define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
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+/**
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+ * kvm_readonly_mem_enabled:
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+ *
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+ * Returns: true if KVM readonly memory is enabled (ie the kernel
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+ * supports it and we're running in a configuration that permits it).
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+ */
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+#define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed)
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+
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#else
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#define kvm_enabled() (0)
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#define kvm_irqchip_in_kernel() (false)
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@@ -104,6 +113,7 @@ extern bool kvm_gsi_routing_allowed;
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#define kvm_irqfds_enabled() (false)
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#define kvm_msi_via_irqfd_enabled() (false)
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#define kvm_gsi_routing_allowed() (false)
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+#define kvm_readonly_mem_enabled() (false)
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#endif
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struct kvm_run;
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diff --git a/kvm-all.c b/kvm-all.c
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index 603bd4b..0a70ca1 100644
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--- a/kvm-all.c
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+++ b/kvm-all.c
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@@ -113,6 +113,7 @@ bool kvm_irqfds_allowed;
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bool kvm_msi_via_irqfd_allowed;
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bool kvm_gsi_routing_allowed;
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bool kvm_allowed;
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+bool kvm_readonly_mem_allowed;
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static const KVMCapabilityInfo kvm_required_capabilites[] = {
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KVM_CAP_INFO(USER_MEMORY),
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@@ -1435,6 +1436,11 @@ int kvm_init(void)
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s->irq_set_ioctl = KVM_IRQ_LINE_STATUS;
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}
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+#ifdef KVM_CAP_READONLY_MEM
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+ kvm_readonly_mem_allowed =
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+ (kvm_check_extension(s, KVM_CAP_READONLY_MEM) > 0);
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+#endif
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+
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ret = kvm_arch_init(s);
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if (ret < 0) {
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goto err;
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diff --git a/kvm-stub.c b/kvm-stub.c
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index b2c8f9b..22eaff0 100644
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--- a/kvm-stub.c
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+++ b/kvm-stub.c
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@@ -26,6 +26,7 @@ bool kvm_irqfds_allowed;
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bool kvm_msi_via_irqfd_allowed;
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bool kvm_gsi_routing_allowed;
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bool kvm_allowed;
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+bool kvm_readonly_mem_allowed;
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int kvm_init_vcpu(CPUState *cpu)
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{
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--
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1.7.1
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