linux-kernel - [RESEND PATCH V6 1/5] target/i386 : add coalesced pio support

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Date:   Fri, 19 Oct 2018 03:43:35 +0800
From:   Peng Hao <peng.hao2@....com.cn>
To:     pbonzini@...hat.com, rkrcmar@...hat.com, stefanha@...il.com
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Peng Hao <peng.hao2@....com.cn>
Subject: [RESEND PATCH V6 1/5]  target/i386 : add coalesced pio support

add coalesced_pio's struct and KVM_CAP_COALESCED_PIO header.

Signed-off-by: Peng Hao <peng.hao2@....com.cn>
---
 accel/kvm/kvm-all.c       |  4 ++--
 linux-headers/linux/kvm.h | 11 +++++++++--
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 799966f..7724055 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -538,7 +538,7 @@ static void kvm_coalesce_mmio_region(MemoryListener *listener,
 
         zone.addr = start;
         zone.size = size;
-        zone.pad = 0;
+        zone.pio = 0;
 
         (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
     }
@@ -555,7 +555,7 @@ static void kvm_uncoalesce_mmio_region(MemoryListener *listener,
 
         zone.addr = start;
         zone.size = size;
-        zone.pad = 0;
+        zone.pio = 0;
 
         (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
     }
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index 83ba4eb..670a3d1 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -420,13 +420,19 @@ struct kvm_run {
 struct kvm_coalesced_mmio_zone {
 	__u64 addr;
 	__u32 size;
-	__u32 pad;
+   union {
+       __u32 pad;
+       __u32 pio;
+   };
 };
 
 struct kvm_coalesced_mmio {
 	__u64 phys_addr;
 	__u32 len;
-	__u32 pad;
+   union {
+       __u32 pad;
+       __u32 pio;
+   };
 	__u8  data[8];
 };
 
@@ -953,6 +959,7 @@ struct kvm_ppc_resize_hpt {
 #define KVM_CAP_NESTED_STATE 157
 #define KVM_CAP_ARM_INJECT_SERROR_ESR 158
 #define KVM_CAP_MSR_PLATFORM_INFO 159
+#define KVM_CAP_COALESCED_PIO 162
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
-- 
1.8.3.1