Merge drm/drm-next into drm-intel-next-queued

Pull in v4.20-rc3 via drm-next.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

15 files changed, 250 insertions, 41 deletions

diff --git a/samples/Kconfig b/samples/Kconfig
index bd133efc1a56..ad1ec7016d4c 100644
--- a/samples/Kconfig
+++ b/samples/Kconfig
@@ -1,5 +1,6 @@
 menuconfig SAMPLES
 	bool "Sample kernel code"
+	depends on !UML
 	help
 	  You can build and test sample kernel code here.
 
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index 36f9f41d094b..be0a961450bc 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -153,6 +153,7 @@ always += tcp_cong_kern.o
 always += tcp_iw_kern.o
 always += tcp_clamp_kern.o
 always += tcp_basertt_kern.o
+always += tcp_tos_reflect_kern.o
 always += xdp_redirect_kern.o
 always += xdp_redirect_map_kern.o
 always += xdp_redirect_cpu_kern.o
diff --git a/samples/bpf/bpf_load.c b/samples/bpf/bpf_load.c
index 904e775d1a44..e6d7e0fe155b 100644
--- a/samples/bpf/bpf_load.c
+++ b/samples/bpf/bpf_load.c
@@ -16,7 +16,6 @@
 #include <linux/netlink.h>
 #include <linux/rtnetlink.h>
 #include <linux/types.h>
-#include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/syscall.h>
 #include <sys/ioctl.h>
diff --git a/samples/bpf/sampleip_user.c b/samples/bpf/sampleip_user.c
index 60c2b73d1b4d..216c7ecbbbe9 100644
--- a/samples/bpf/sampleip_user.c
+++ b/samples/bpf/sampleip_user.c
@@ -9,7 +9,6 @@
  */
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdio.h>
 #include <unistd.h>
 #include <errno.h>
 #include <signal.h>
diff --git a/samples/bpf/sockex2_kern.c b/samples/bpf/sockex2_kern.c
index f58acfc92556..f2f9dbc021b0 100644
--- a/samples/bpf/sockex2_kern.c
+++ b/samples/bpf/sockex2_kern.c
@@ -14,7 +14,7 @@ struct vlan_hdr {
 	__be16 h_vlan_encapsulated_proto;
 };
 
-struct bpf_flow_keys {
+struct flow_key_record {
 	__be32 src;
 	__be32 dst;
 	union {
@@ -59,7 +59,7 @@ static inline __u32 ipv6_addr_hash(struct __sk_buff *ctx, __u64 off)
 }
 
 static inline __u64 parse_ip(struct __sk_buff *skb, __u64 nhoff, __u64 *ip_proto,
-			     struct bpf_flow_keys *flow)
+			     struct flow_key_record *flow)
 {
 	__u64 verlen;
 
@@ -83,7 +83,7 @@ static inline __u64 parse_ip(struct __sk_buff *skb, __u64 nhoff, __u64 *ip_proto
 }
 
 static inline __u64 parse_ipv6(struct __sk_buff *skb, __u64 nhoff, __u64 *ip_proto,
-			       struct bpf_flow_keys *flow)
+			       struct flow_key_record *flow)
 {
 	*ip_proto = load_byte(skb,
 			      nhoff + offsetof(struct ipv6hdr, nexthdr));
@@ -96,7 +96,8 @@ static inline __u64 parse_ipv6(struct __sk_buff *skb, __u64 nhoff, __u64 *ip_pro
 	return nhoff;
 }
 
-static inline bool flow_dissector(struct __sk_buff *skb, struct bpf_flow_keys *flow)
+static inline bool flow_dissector(struct __sk_buff *skb,
+				  struct flow_key_record *flow)
 {
 	__u64 nhoff = ETH_HLEN;
 	__u64 ip_proto;
@@ -198,7 +199,7 @@ struct bpf_map_def SEC("maps") hash_map = {
 SEC("socket2")
 int bpf_prog2(struct __sk_buff *skb)
 {
-	struct bpf_flow_keys flow = {};
+	struct flow_key_record flow = {};
 	struct pair *value;
 	u32 key;
 
diff --git a/samples/bpf/sockex3_kern.c b/samples/bpf/sockex3_kern.c
index 95907f8d2b17..c527b57d3ec8 100644
--- a/samples/bpf/sockex3_kern.c
+++ b/samples/bpf/sockex3_kern.c
@@ -61,7 +61,7 @@ struct vlan_hdr {
 	__be16 h_vlan_encapsulated_proto;
 };
 
-struct bpf_flow_keys {
+struct flow_key_record {
 	__be32 src;
 	__be32 dst;
 	union {
@@ -88,7 +88,7 @@ static inline __u32 ipv6_addr_hash(struct __sk_buff *ctx, __u64 off)
 }
 
 struct globals {
-	struct bpf_flow_keys flow;
+	struct flow_key_record flow;
 };
 
 struct bpf_map_def SEC("maps") percpu_map = {
@@ -114,14 +114,14 @@ struct pair {
 
 struct bpf_map_def SEC("maps") hash_map = {
 	.type = BPF_MAP_TYPE_HASH,
-	.key_size = sizeof(struct bpf_flow_keys),
+	.key_size = sizeof(struct flow_key_record),
 	.value_size = sizeof(struct pair),
 	.max_entries = 1024,
 };
 
 static void update_stats(struct __sk_buff *skb, struct globals *g)
 {
-	struct bpf_flow_keys key = g->flow;
+	struct flow_key_record key = g->flow;
 	struct pair *value;
 
 	value = bpf_map_lookup_elem(&hash_map, &key);
diff --git a/samples/bpf/sockex3_user.c b/samples/bpf/sockex3_user.c
index 5ba3ae9d180b..9d02e0404719 100644
--- a/samples/bpf/sockex3_user.c
+++ b/samples/bpf/sockex3_user.c
@@ -13,7 +13,7 @@
 #define PARSE_IP_PROG_FD (prog_fd[0])
 #define PROG_ARRAY_FD (map_fd[0])
 
-struct bpf_flow_keys {
+struct flow_key_record {
 	__be32 src;
 	__be32 dst;
 	union {
@@ -64,7 +64,7 @@ int main(int argc, char **argv)
 	(void) f;
 
 	for (i = 0; i < 5; i++) {
-		struct bpf_flow_keys key = {}, next_key;
+		struct flow_key_record key = {}, next_key;
 		struct pair value;
 
 		sleep(1);
diff --git a/samples/bpf/tcp_tos_reflect_kern.c b/samples/bpf/tcp_tos_reflect_kern.c
new file mode 100644
index 000000000000..d51dab19eca6
--- /dev/null
+++ b/samples/bpf/tcp_tos_reflect_kern.c
@@ -0,0 +1,87 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 Facebook
+ *
+ * BPF program to automatically reflect TOS option from received syn packet
+ *
+ * Use load_sock_ops to load this BPF program.
+ */
+
+#include <uapi/linux/bpf.h>
+#include <uapi/linux/tcp.h>
+#include <uapi/linux/if_ether.h>
+#include <uapi/linux/if_packet.h>
+#include <uapi/linux/ip.h>
+#include <uapi/linux/ipv6.h>
+#include <uapi/linux/in.h>
+#include <linux/socket.h>
+#include "bpf_helpers.h"
+#include "bpf_endian.h"
+
+#define DEBUG 1
+
+#define bpf_printk(fmt, ...)					\
+({								\
+	       char ____fmt[] = fmt;				\
+	       bpf_trace_printk(____fmt, sizeof(____fmt),	\
+				##__VA_ARGS__);			\
+})
+
+SEC("sockops")
+int bpf_basertt(struct bpf_sock_ops *skops)
+{
+	char header[sizeof(struct ipv6hdr)];
+	struct ipv6hdr *hdr6;
+	struct iphdr *hdr;
+	int hdr_size = 0;
+	int save_syn = 1;
+	int tos = 0;
+	int rv = 0;
+	int op;
+
+	op = (int) skops->op;
+
+#ifdef DEBUG
+	bpf_printk("BPF command: %d\n", op);
+#endif
+	switch (op) {
+	case BPF_SOCK_OPS_TCP_LISTEN_CB:
+		rv = bpf_setsockopt(skops, SOL_TCP, TCP_SAVE_SYN,
+				   &save_syn, sizeof(save_syn));
+		break;
+	case BPF_SOCK_OPS_PASSIVE_ESTABLISHED_CB:
+		if (skops->family == AF_INET)
+			hdr_size = sizeof(struct iphdr);
+		else
+			hdr_size = sizeof(struct ipv6hdr);
+		rv = bpf_getsockopt(skops, SOL_TCP, TCP_SAVED_SYN,
+				    header, hdr_size);
+		if (!rv) {
+			if (skops->family == AF_INET) {
+				hdr = (struct iphdr *) header;
+				tos = hdr->tos;
+				if (tos != 0)
+					bpf_setsockopt(skops, SOL_IP, IP_TOS,
+						       &tos, sizeof(tos));
+			} else {
+				hdr6 = (struct ipv6hdr *) header;
+				tos = ((hdr6->priority) << 4 |
+				       (hdr6->flow_lbl[0]) >>  4);
+				if (tos)
+					bpf_setsockopt(skops, SOL_IPV6,
+						       IPV6_TCLASS,
+						       &tos, sizeof(tos));
+			}
+			rv = 0;
+		}
+		break;
+	default:
+		rv = -1;
+	}
+#ifdef DEBUG
+	bpf_printk("Returning %d\n", rv);
+#endif
+	skops->reply = rv;
+	return 1;
+}
+char _license[] SEC("license") = "GPL";
diff --git a/samples/bpf/test_cgrp2_attach2.c b/samples/bpf/test_cgrp2_attach2.c
index 180f9d813bca..d7b68ef5ba79 100644
--- a/samples/bpf/test_cgrp2_attach2.c
+++ b/samples/bpf/test_cgrp2_attach2.c
@@ -209,7 +209,7 @@ static int map_fd = -1;
 
 static int prog_load_cnt(int verdict, int val)
 {
-	int cgroup_storage_fd;
+	int cgroup_storage_fd, percpu_cgroup_storage_fd;
 
 	if (map_fd < 0)
 		map_fd = bpf_create_map(BPF_MAP_TYPE_ARRAY, 4, 8, 1, 0);
@@ -225,6 +225,14 @@ static int prog_load_cnt(int verdict, int val)
 		return -1;
 	}
 
+	percpu_cgroup_storage_fd = bpf_create_map(
+		BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE,
+		sizeof(struct bpf_cgroup_storage_key), 8, 0, 0);
+	if (percpu_cgroup_storage_fd < 0) {
+		printf("failed to create map '%s'\n", strerror(errno));
+		return -1;
+	}
+
 	struct bpf_insn prog[] = {
 		BPF_MOV32_IMM(BPF_REG_0, 0),
 		BPF_STX_MEM(BPF_W, BPF_REG_10, BPF_REG_0, -4), /* *(u32 *)(fp - 4) = r0 */
@@ -235,11 +243,20 @@ static int prog_load_cnt(int verdict, int val)
 		BPF_JMP_IMM(BPF_JEQ, BPF_REG_0, 0, 2),
 		BPF_MOV64_IMM(BPF_REG_1, val), /* r1 = 1 */
 		BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_DW, BPF_REG_0, BPF_REG_1, 0, 0), /* xadd r0 += r1 */
+
 		BPF_LD_MAP_FD(BPF_REG_1, cgroup_storage_fd),
 		BPF_MOV64_IMM(BPF_REG_2, 0),
 		BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_local_storage),
 		BPF_MOV64_IMM(BPF_REG_1, val),
 		BPF_RAW_INSN(BPF_STX | BPF_XADD | BPF_W, BPF_REG_0, BPF_REG_1, 0, 0),
+
+		BPF_LD_MAP_FD(BPF_REG_1, percpu_cgroup_storage_fd),
+		BPF_MOV64_IMM(BPF_REG_2, 0),
+		BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 0, 0, BPF_FUNC_get_local_storage),
+		BPF_LDX_MEM(BPF_W, BPF_REG_3, BPF_REG_0, 0),
+		BPF_ALU64_IMM(BPF_ADD, BPF_REG_3, 0x1),
+		BPF_STX_MEM(BPF_W, BPF_REG_0, BPF_REG_3, 0),
+
 		BPF_MOV64_IMM(BPF_REG_0, verdict), /* r0 = verdict */
 		BPF_EXIT_INSN(),
 	};
diff --git a/samples/bpf/test_current_task_under_cgroup_user.c b/samples/bpf/test_current_task_under_cgroup_user.c
index 4be4874ca2bc..2259f997a26c 100644
--- a/samples/bpf/test_current_task_under_cgroup_user.c
+++ b/samples/bpf/test_current_task_under_cgroup_user.c
@@ -11,7 +11,6 @@
 #include <unistd.h>
 #include <bpf/bpf.h>
 #include "bpf_load.h"
-#include <linux/bpf.h>
 #include "cgroup_helpers.h"
 
 #define CGROUP_PATH		"/my-cgroup"
diff --git a/samples/bpf/tracex3_user.c b/samples/bpf/tracex3_user.c
index 6c6b10f4c3ee..56466d010139 100644
--- a/samples/bpf/tracex3_user.c
+++ b/samples/bpf/tracex3_user.c
@@ -17,8 +17,6 @@
 #include "bpf_load.h"
 #include "bpf_util.h"
 
-#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
-
 #define SLOTS 100
 
 static void clear_stats(int fd)
diff --git a/samples/bpf/xdpsock_kern.c b/samples/bpf/xdpsock_kern.c
index d8806c41362e..b8ccd0802b3f 100644
--- a/samples/bpf/xdpsock_kern.c
+++ b/samples/bpf/xdpsock_kern.c
@@ -16,7 +16,7 @@ struct bpf_map_def SEC("maps") xsks_map = {
 	.type = BPF_MAP_TYPE_XSKMAP,
 	.key_size = sizeof(int),
 	.value_size = sizeof(int),
-	.max_entries = 4,
+	.max_entries = MAX_SOCKS,
 };
 
 struct bpf_map_def SEC("maps") rr_map = {
diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index 4914788b6727..57ecadc58403 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -118,7 +118,6 @@ struct xdpsock {
 	unsigned long prev_tx_npkts;
 };
 
-#define MAX_SOCKS 4
 static int num_socks;
 struct xdpsock *xsks[MAX_SOCKS];
 
@@ -596,7 +595,7 @@ static void dump_stats(void)
 
 	prev_time = now;
 
-	for (i = 0; i < num_socks; i++) {
+	for (i = 0; i < num_socks && xsks[i]; i++) {
 		char *fmt = "%-15s %'-11.0f %'-11lu\n";
 		double rx_pps, tx_pps;
 
@@ -649,6 +648,8 @@ static struct option long_options[] = {
 	{"xdp-skb", no_argument, 0, 'S'},
 	{"xdp-native", no_argument, 0, 'N'},
 	{"interval", required_argument, 0, 'n'},
+	{"zero-copy", no_argument, 0, 'z'},
+	{"copy", no_argument, 0, 'c'},
 	{0, 0, 0, 0}
 };
 
@@ -667,6 +668,8 @@ static void usage(const char *prog)
 		"  -S, --xdp-skb=n	Use XDP skb-mod\n"
 		"  -N, --xdp-native=n	Enfore XDP native mode\n"
 		"  -n, --interval=n	Specify statistics update interval (default 1 sec).\n"
+		"  -z, --zero-copy      Force zero-copy mode.\n"
+		"  -c, --copy           Force copy mode.\n"
 		"\n";
 	fprintf(stderr, str, prog);
 	exit(EXIT_FAILURE);
@@ -679,7 +682,7 @@ static void parse_command_line(int argc, char **argv)
 	opterr = 0;
 
 	for (;;) {
-		c = getopt_long(argc, argv, "rtli:q:psSNn:", long_options,
+		c = getopt_long(argc, argv, "rtli:q:psSNn:cz", long_options,
 				&option_index);
 		if (c == -1)
 			break;
@@ -716,6 +719,12 @@ static void parse_command_line(int argc, char **argv)
 		case 'n':
 			opt_interval = atoi(optarg);
 			break;
+		case 'z':
+			opt_xdp_bind_flags |= XDP_ZEROCOPY;
+			break;
+		case 'c':
+			opt_xdp_bind_flags |= XDP_COPY;
+			break;
 		default:
 			usage(basename(argv[0]));
 		}
diff --git a/samples/mei/mei-amt-version.c b/samples/mei/mei-amt-version.c
index 57d0d871dcf7..33e67bd1dc34 100644
--- a/samples/mei/mei-amt-version.c
+++ b/samples/mei/mei-amt-version.c
@@ -370,7 +370,7 @@ static uint32_t amt_host_if_call(struct amt_host_if *acmd,
 			unsigned int expected_sz)
 {
 	uint32_t in_buf_sz;
-	uint32_t out_buf_sz;
+	ssize_t out_buf_sz;
 	ssize_t written;
 	uint32_t status;
 	struct amt_host_if_resp_header *msg_hdr;
diff --git a/samples/vfio-mdev/mbochs.c b/samples/vfio-mdev/mbochs.c
index 2535c3677c7b..ca7960adf5a3 100644
--- a/samples/vfio-mdev/mbochs.c
+++ b/samples/vfio-mdev/mbochs.c
@@ -71,11 +71,19 @@
 #define MBOCHS_NAME		  "mbochs"
 #define MBOCHS_CLASS_NAME	  "mbochs"
 
+#define MBOCHS_EDID_REGION_INDEX  VFIO_PCI_NUM_REGIONS
+#define MBOCHS_NUM_REGIONS        (MBOCHS_EDID_REGION_INDEX+1)
+
 #define MBOCHS_CONFIG_SPACE_SIZE  0xff
 #define MBOCHS_MMIO_BAR_OFFSET	  PAGE_SIZE
 #define MBOCHS_MMIO_BAR_SIZE	  PAGE_SIZE
-#define MBOCHS_MEMORY_BAR_OFFSET  (MBOCHS_MMIO_BAR_OFFSET + \
+#define MBOCHS_EDID_OFFSET	  (MBOCHS_MMIO_BAR_OFFSET +	\
 				   MBOCHS_MMIO_BAR_SIZE)
+#define MBOCHS_EDID_SIZE	  PAGE_SIZE
+#define MBOCHS_MEMORY_BAR_OFFSET  (MBOCHS_EDID_OFFSET + \
+				   MBOCHS_EDID_SIZE)
+
+#define MBOCHS_EDID_BLOB_OFFSET   (MBOCHS_EDID_SIZE/2)
 
 #define STORE_LE16(addr, val)	(*(u16 *)addr = val)
 #define STORE_LE32(addr, val)	(*(u32 *)addr = val)
@@ -95,16 +103,24 @@ MODULE_PARM_DESC(mem, "megabytes available to " MBOCHS_NAME " devices");
 static const struct mbochs_type {
 	const char *name;
 	u32 mbytes;
+	u32 max_x;
+	u32 max_y;
 } mbochs_types[] = {
 	{
 		.name	= MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_1,
 		.mbytes = 4,
+		.max_x  = 800,
+		.max_y  = 600,
 	}, {
 		.name	= MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_2,
 		.mbytes = 16,
+		.max_x  = 1920,
+		.max_y  = 1440,
 	}, {
 		.name	= MBOCHS_CLASS_NAME "-" MBOCHS_TYPE_3,
 		.mbytes = 64,
+		.max_x  = 0,
+		.max_y  = 0,
 	},
 };
 
@@ -115,6 +131,11 @@ static struct cdev	mbochs_cdev;
 static struct device	mbochs_dev;
 static int		mbochs_used_mbytes;
 
+struct vfio_region_info_ext {
+	struct vfio_region_info          base;
+	struct vfio_region_info_cap_type type;
+};
+
 struct mbochs_mode {
 	u32 drm_format;
 	u32 bytepp;
@@ -144,13 +165,14 @@ struct mdev_state {
 	u32 memory_bar_mask;
 	struct mutex ops_lock;
 	struct mdev_device *mdev;
-	struct vfio_device_info dev_info;
 
 	const struct mbochs_type *type;
 	u16 vbe[VBE_DISPI_INDEX_COUNT];
 	u64 memsize;
 	struct page **pages;
 	pgoff_t pagecount;
+	struct vfio_region_gfx_edid edid_regs;
+	u8 edid_blob[0x400];
 
 	struct list_head dmabufs;
 	u32 active_id;
@@ -342,10 +364,20 @@ static void handle_mmio_read(struct mdev_state *mdev_state, u16 offset,
 			     char *buf, u32 count)
 {
 	struct device *dev = mdev_dev(mdev_state->mdev);
+	struct vfio_region_gfx_edid *edid;
 	u16 reg16 = 0;
 	int index;
 
 	switch (offset) {
+	case 0x000 ... 0x3ff: /* edid block */
+		edid = &mdev_state->edid_regs;
+		if (edid->link_state != VFIO_DEVICE_GFX_LINK_STATE_UP ||
+		    offset >= edid->edid_size) {
+			memset(buf, 0, count);
+			break;
+		}
+		memcpy(buf, mdev_state->edid_blob + offset, count);
+		break;
 	case 0x500 ... 0x515: /* bochs dispi interface */
 		if (count != 2)
 			goto unhandled;
@@ -365,6 +397,44 @@ unhandled:
 	}
 }
 
+static void handle_edid_regs(struct mdev_state *mdev_state, u16 offset,
+			     char *buf, u32 count, bool is_write)
+{
+	char *regs = (void *)&mdev_state->edid_regs;
+
+	if (offset + count > sizeof(mdev_state->edid_regs))
+		return;
+	if (count != 4)
+		return;
+	if (offset % 4)
+		return;
+
+	if (is_write) {
+		switch (offset) {
+		case offsetof(struct vfio_region_gfx_edid, link_state):
+		case offsetof(struct vfio_region_gfx_edid, edid_size):
+			memcpy(regs + offset, buf, count);
+			break;
+		default:
+			/* read-only regs */
+			break;
+		}
+	} else {
+		memcpy(buf, regs + offset, count);
+	}
+}
+
+static void handle_edid_blob(struct mdev_state *mdev_state, u16 offset,
+			     char *buf, u32 count, bool is_write)
+{
+	if (offset + count > mdev_state->edid_regs.edid_max_size)
+		return;
+	if (is_write)
+		memcpy(mdev_state->edid_blob + offset, buf, count);
+	else
+		memcpy(buf, mdev_state->edid_blob + offset, count);
+}
+
 static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
 			   loff_t pos, bool is_write)
 {
@@ -384,13 +454,25 @@ static ssize_t mdev_access(struct mdev_device *mdev, char *buf, size_t count,
 			memcpy(buf, (mdev_state->vconfig + pos), count);
 
 	} else if (pos >= MBOCHS_MMIO_BAR_OFFSET &&
-		   pos + count <= MBOCHS_MEMORY_BAR_OFFSET) {
+		   pos + count <= (MBOCHS_MMIO_BAR_OFFSET +
+				   MBOCHS_MMIO_BAR_SIZE)) {
 		pos -= MBOCHS_MMIO_BAR_OFFSET;
 		if (is_write)
 			handle_mmio_write(mdev_state, pos, buf, count);
 		else
 			handle_mmio_read(mdev_state, pos, buf, count);
 
+	} else if (pos >= MBOCHS_EDID_OFFSET &&
+		   pos + count <= (MBOCHS_EDID_OFFSET +
+				   MBOCHS_EDID_SIZE)) {
+		pos -= MBOCHS_EDID_OFFSET;
+		if (pos < MBOCHS_EDID_BLOB_OFFSET) {
+			handle_edid_regs(mdev_state, pos, buf, count, is_write);
+		} else {
+			pos -= MBOCHS_EDID_BLOB_OFFSET;
+			handle_edid_blob(mdev_state, pos, buf, count, is_write);
+		}
+
 	} else if (pos >= MBOCHS_MEMORY_BAR_OFFSET &&
 		   pos + count <=
 		   MBOCHS_MEMORY_BAR_OFFSET + mdev_state->memsize) {
@@ -471,6 +553,10 @@ static int mbochs_create(struct kobject *kobj, struct mdev_device *mdev)
 	mdev_state->next_id = 1;
 
 	mdev_state->type = type;
+	mdev_state->edid_regs.max_xres = type->max_x;
+	mdev_state->edid_regs.max_yres = type->max_y;
+	mdev_state->edid_regs.edid_offset = MBOCHS_EDID_BLOB_OFFSET;
+	mdev_state->edid_regs.edid_max_size = sizeof(mdev_state->edid_blob);
 	mbochs_create_config_space(mdev_state);
 	mbochs_reset(mdev);
 
@@ -932,16 +1018,16 @@ static int mbochs_dmabuf_export(struct mbochs_dmabuf *dmabuf)
 }
 
 static int mbochs_get_region_info(struct mdev_device *mdev,
-				  struct vfio_region_info *region_info,
-				  u16 *cap_type_id, void **cap_type)
+				  struct vfio_region_info_ext *ext)
 {
+	struct vfio_region_info *region_info = &ext->base;
 	struct mdev_state *mdev_state;
 
 	mdev_state = mdev_get_drvdata(mdev);
 	if (!mdev_state)
 		return -EINVAL;
 
-	if (region_info->index >= VFIO_PCI_NUM_REGIONS)
+	if (region_info->index >= MBOCHS_NUM_REGIONS)
 		return -EINVAL;
 
 	switch (region_info->index) {
@@ -964,6 +1050,20 @@ static int mbochs_get_region_info(struct mdev_device *mdev,
 		region_info->flags  = (VFIO_REGION_INFO_FLAG_READ  |
 				       VFIO_REGION_INFO_FLAG_WRITE);
 		break;
+	case MBOCHS_EDID_REGION_INDEX:
+		ext->base.argsz = sizeof(*ext);
+		ext->base.offset = MBOCHS_EDID_OFFSET;
+		ext->base.size = MBOCHS_EDID_SIZE;
+		ext->base.flags = (VFIO_REGION_INFO_FLAG_READ  |
+				   VFIO_REGION_INFO_FLAG_WRITE |
+				   VFIO_REGION_INFO_FLAG_CAPS);
+		ext->base.cap_offset = offsetof(typeof(*ext), type);
+		ext->type.header.id = VFIO_REGION_INFO_CAP_TYPE;
+		ext->type.header.version = 1;
+		ext->type.header.next = 0;
+		ext->type.type = VFIO_REGION_TYPE_GFX;
+		ext->type.subtype = VFIO_REGION_SUBTYPE_GFX_EDID;
+		break;
 	default:
 		region_info->size   = 0;
 		region_info->offset = 0;
@@ -984,7 +1084,7 @@ static int mbochs_get_device_info(struct mdev_device *mdev,
 				  struct vfio_device_info *dev_info)
 {
 	dev_info->flags = VFIO_DEVICE_FLAGS_PCI;
-	dev_info->num_regions = VFIO_PCI_NUM_REGIONS;
+	dev_info->num_regions = MBOCHS_NUM_REGIONS;
 	dev_info->num_irqs = VFIO_PCI_NUM_IRQS;
 	return 0;
 }
@@ -1084,7 +1184,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
 			unsigned long arg)
 {
 	int ret = 0;
-	unsigned long minsz;
+	unsigned long minsz, outsz;
 	struct mdev_state *mdev_state;
 
 	mdev_state = mdev_get_drvdata(mdev);
@@ -1106,8 +1206,6 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
 		if (ret)
 			return ret;
 
-		memcpy(&mdev_state->dev_info, &info, sizeof(info));
-
 		if (copy_to_user((void __user *)arg, &info, minsz))
 			return -EFAULT;
 
@@ -1115,24 +1213,24 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
 	}
 	case VFIO_DEVICE_GET_REGION_INFO:
 	{
-		struct vfio_region_info info;
-		u16 cap_type_id = 0;
-		void *cap_type = NULL;
+		struct vfio_region_info_ext info;
 
-		minsz = offsetofend(struct vfio_region_info, offset);
+		minsz = offsetofend(typeof(info), base.offset);
 
 		if (copy_from_user(&info, (void __user *)arg, minsz))
 			return -EFAULT;
 
-		if (info.argsz < minsz)
+		outsz = info.base.argsz;
+		if (outsz < minsz)
+			return -EINVAL;
+		if (outsz > sizeof(info))
 			return -EINVAL;
 
-		ret = mbochs_get_region_info(mdev, &info, &cap_type_id,
-					   &cap_type);
+		ret = mbochs_get_region_info(mdev, &info);
 		if (ret)
 			return ret;
 
-		if (copy_to_user((void __user *)arg, &info, minsz))
+		if (copy_to_user((void __user *)arg, &info, outsz))
 			return -EFAULT;
 
 		return 0;
@@ -1148,7 +1246,7 @@ static long mbochs_ioctl(struct mdev_device *mdev, unsigned int cmd,
 			return -EFAULT;
 
 		if ((info.argsz < minsz) ||
-		    (info.index >= mdev_state->dev_info.num_irqs))
+		    (info.index >= VFIO_PCI_NUM_IRQS))
 			return -EINVAL;
 
 		ret = mbochs_get_irq_info(mdev, &info);