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