diff options
| author | Andrew Jones <drjones@redhat.com> | 2017-06-04 15:43:51 +0300 |
|---|---|---|
| committer | Christoffer Dall <cdall@linaro.org> | 2017-06-04 17:53:00 +0300 |
| commit | 2387149eade25f32dcf1398811b3d0293181d005 (patch) | |
| tree | ec73541bd9dd64aec5a9923a5378574ce2fcd1cc /include/linux | |
| parent | 0710f9a637ef209e53c8127cf588a46130fcdcc5 (diff) | |
| download | linux-2387149eade25f32dcf1398811b3d0293181d005.tar.xz | |
KVM: improve arch vcpu request defining
Marc Zyngier suggested that we define the arch specific VCPU request
base, rather than requiring each arch to remember to start from 8.
That suggestion, along with Radim Krcmar's recent VCPU request flag
addition, snowballed into defining something of an arch VCPU request
defining API.
No functional change.
(Looks like x86 is running out of arch VCPU request bits. Maybe
someday we'll need to extend to 64.)
Signed-off-by: Andrew Jones <drjones@redhat.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/kvm_host.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 8c0664309815..3724b51aab64 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -126,6 +126,13 @@ static inline bool is_error_page(struct page *page) #define KVM_REQ_MMU_RELOAD (1 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) #define KVM_REQ_PENDING_TIMER 2 #define KVM_REQ_UNHALT 3 +#define KVM_REQUEST_ARCH_BASE 8 + +#define KVM_ARCH_REQ_FLAGS(nr, flags) ({ \ + BUILD_BUG_ON((unsigned)(nr) >= 32 - KVM_REQUEST_ARCH_BASE); \ + (unsigned)(((nr) + KVM_REQUEST_ARCH_BASE) | (flags)); \ +}) +#define KVM_ARCH_REQ(nr) KVM_ARCH_REQ_FLAGS(nr, 0) #define KVM_USERSPACE_IRQ_SOURCE_ID 0 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 |