Re: [PATCH v2 3/4] drm/vmwgfx: Update the backdoor call with support for new instructions

From: Dave Airlie
Date: Mon Aug 26 2019 - 16:12:40 EST

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Acked-by: Dave Airlie <airlied@xxxxxxxxxx>

(for merging via x86 trees).

Dave.

On Fri, 23 Aug 2019 at 18:13, Thomas HellstrÃm (VMware)
<thomas_os@xxxxxxxxxxxx> wrote:
>
> From: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
>
> Use the definition provided by include/asm/vmware.h
>
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: Borislav Petkov <bp@xxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: <x86@xxxxxxxxxx>
> Cc: <dri-devel@xxxxxxxxxxxxxxxxxxxxx>
> Signed-off-by: Thomas Hellstrom <thellstrom@xxxxxxxxxx>
> Reviewed-by: Doug Covelli <dcovelli@xxxxxxxxxx>
> ---
> drivers/gpu/drm/vmwgfx/vmwgfx_msg.c | 21 +++++++++--------
> drivers/gpu/drm/vmwgfx/vmwgfx_msg.h | 35 +++++++++++++++--------------
> 2 files changed, 28 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
> index 81a86c3b77bc..1281e52898ee 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.c
> @@ -45,8 +45,6 @@
> #define RETRIES 3
>
> #define VMW_HYPERVISOR_MAGIC 0x564D5868
> -#define VMW_HYPERVISOR_PORT 0x5658
> -#define VMW_HYPERVISOR_HB_PORT 0x5659
>
> #define VMW_PORT_CMD_MSG 30
> #define VMW_PORT_CMD_HB_MSG 0
> @@ -92,7 +90,7 @@ static int vmw_open_channel(struct rpc_channel *channel, unsigned int protocol)
>
> VMW_PORT(VMW_PORT_CMD_OPEN_CHANNEL,
> (protocol | GUESTMSG_FLAG_COOKIE), si, di,
> - VMW_HYPERVISOR_PORT,
> + 0,
> VMW_HYPERVISOR_MAGIC,
> eax, ebx, ecx, edx, si, di);
>
> @@ -125,7 +123,7 @@ static int vmw_close_channel(struct rpc_channel *channel)
>
> VMW_PORT(VMW_PORT_CMD_CLOSE_CHANNEL,
> 0, si, di,
> - (VMW_HYPERVISOR_PORT | (channel->channel_id << 16)),
> + channel->channel_id << 16,
> VMW_HYPERVISOR_MAGIC,
> eax, ebx, ecx, edx, si, di);
>
> @@ -159,7 +157,8 @@ static unsigned long vmw_port_hb_out(struct rpc_channel *channel,
> VMW_PORT_HB_OUT(
> (MESSAGE_STATUS_SUCCESS << 16) | VMW_PORT_CMD_HB_MSG,
> msg_len, si, di,
> - VMW_HYPERVISOR_HB_PORT | (channel->channel_id << 16),
> + VMWARE_HYPERVISOR_HB | (channel->channel_id << 16) |
> + VMWARE_HYPERVISOR_OUT,
> VMW_HYPERVISOR_MAGIC, bp,
> eax, ebx, ecx, edx, si, di);
>
> @@ -180,7 +179,7 @@ static unsigned long vmw_port_hb_out(struct rpc_channel *channel,
>
> VMW_PORT(VMW_PORT_CMD_MSG | (MSG_TYPE_SENDPAYLOAD << 16),
> word, si, di,
> - VMW_HYPERVISOR_PORT | (channel->channel_id << 16),
> + channel->channel_id << 16,
> VMW_HYPERVISOR_MAGIC,
> eax, ebx, ecx, edx, si, di);
> }
> @@ -212,7 +211,7 @@ static unsigned long vmw_port_hb_in(struct rpc_channel *channel, char *reply,
> VMW_PORT_HB_IN(
> (MESSAGE_STATUS_SUCCESS << 16) | VMW_PORT_CMD_HB_MSG,
> reply_len, si, di,
> - VMW_HYPERVISOR_HB_PORT | (channel->channel_id << 16),
> + VMWARE_HYPERVISOR_HB | (channel->channel_id << 16),
> VMW_HYPERVISOR_MAGIC, bp,
> eax, ebx, ecx, edx, si, di);
>
> @@ -229,7 +228,7 @@ static unsigned long vmw_port_hb_in(struct rpc_channel *channel, char *reply,
>
> VMW_PORT(VMW_PORT_CMD_MSG | (MSG_TYPE_RECVPAYLOAD << 16),
> MESSAGE_STATUS_SUCCESS, si, di,
> - VMW_HYPERVISOR_PORT | (channel->channel_id << 16),
> + channel->channel_id << 16,
> VMW_HYPERVISOR_MAGIC,
> eax, ebx, ecx, edx, si, di);
>
> @@ -268,7 +267,7 @@ static int vmw_send_msg(struct rpc_channel *channel, const char *msg)
>
> VMW_PORT(VMW_PORT_CMD_SENDSIZE,
> msg_len, si, di,
> - VMW_HYPERVISOR_PORT | (channel->channel_id << 16),
> + channel->channel_id << 16,
> VMW_HYPERVISOR_MAGIC,
> eax, ebx, ecx, edx, si, di);
>
> @@ -326,7 +325,7 @@ static int vmw_recv_msg(struct rpc_channel *channel, void **msg,
>
> VMW_PORT(VMW_PORT_CMD_RECVSIZE,
> 0, si, di,
> - (VMW_HYPERVISOR_PORT | (channel->channel_id << 16)),
> + channel->channel_id << 16,
> VMW_HYPERVISOR_MAGIC,
> eax, ebx, ecx, edx, si, di);
>
> @@ -370,7 +369,7 @@ static int vmw_recv_msg(struct rpc_channel *channel, void **msg,
>
> VMW_PORT(VMW_PORT_CMD_RECVSTATUS,
> MESSAGE_STATUS_SUCCESS, si, di,
> - (VMW_HYPERVISOR_PORT | (channel->channel_id << 16)),
> + channel->channel_id << 16,
> VMW_HYPERVISOR_MAGIC,
> eax, ebx, ecx, edx, si, di);
>
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.h b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.h
> index 4907e50fb20a..f685c7071dec 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_msg.h
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_msg.h
> @@ -32,6 +32,7 @@
> #ifndef _VMWGFX_MSG_H
> #define _VMWGFX_MSG_H
>
> +#include <asm/vmware.h>
>
> /**
> * Hypervisor-specific bi-directional communication channel. Should never
> @@ -44,7 +45,7 @@
> * @in_ebx: [IN] Message Len, through EBX
> * @in_si: [IN] Input argument through SI, set to 0 if not used
> * @in_di: [IN] Input argument through DI, set ot 0 if not used
> - * @port_num: [IN] port number + [channel id]
> + * @flags: [IN] hypercall flags + [channel id]
> * @magic: [IN] hypervisor magic value
> * @eax: [OUT] value of EAX register
> * @ebx: [OUT] e.g. status from an HB message status command
> @@ -54,10 +55,10 @@
> * @di: [OUT]
> */
> #define VMW_PORT(cmd, in_ebx, in_si, in_di, \
> - port_num, magic, \
> + flags, magic, \
> eax, ebx, ecx, edx, si, di) \
> ({ \
> - asm volatile ("inl %%dx, %%eax;" : \
> + asm volatile (VMWARE_HYPERCALL : \
> "=a"(eax), \
> "=b"(ebx), \
> "=c"(ecx), \
> @@ -67,7 +68,7 @@
> "a"(magic), \
> "b"(in_ebx), \
> "c"(cmd), \
> - "d"(port_num), \
> + "d"(flags), \
> "S"(in_si), \
> "D"(in_di) : \
> "memory"); \
> @@ -85,7 +86,7 @@
> * @in_ecx: [IN] Message Len, through ECX
> * @in_si: [IN] Input argument through SI, set to 0 if not used
> * @in_di: [IN] Input argument through DI, set to 0 if not used
> - * @port_num: [IN] port number + [channel id]
> + * @flags: [IN] hypercall flags + [channel id]
> * @magic: [IN] hypervisor magic value
> * @bp: [IN]
> * @eax: [OUT] value of EAX register
> @@ -98,12 +99,12 @@
> #ifdef __x86_64__
>
> #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \
> - port_num, magic, bp, \
> + flags, magic, bp, \
> eax, ebx, ecx, edx, si, di) \
> ({ \
> asm volatile ("push %%rbp;" \
> "mov %12, %%rbp;" \
> - "rep outsb;" \
> + VMWARE_HYPERCALL_HB_OUT \
> "pop %%rbp;" : \
> "=a"(eax), \
> "=b"(ebx), \
> @@ -114,7 +115,7 @@
> "a"(magic), \
> "b"(cmd), \
> "c"(in_ecx), \
> - "d"(port_num), \
> + "d"(flags), \
> "S"(in_si), \
> "D"(in_di), \
> "r"(bp) : \
> @@ -123,12 +124,12 @@
>
>
> #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \
> - port_num, magic, bp, \
> + flags, magic, bp, \
> eax, ebx, ecx, edx, si, di) \
> ({ \
> asm volatile ("push %%rbp;" \
> "mov %12, %%rbp;" \
> - "rep insb;" \
> + VMWARE_HYPERCALL_HB_IN \
> "pop %%rbp" : \
> "=a"(eax), \
> "=b"(ebx), \
> @@ -139,7 +140,7 @@
> "a"(magic), \
> "b"(cmd), \
> "c"(in_ecx), \
> - "d"(port_num), \
> + "d"(flags), \
> "S"(in_si), \
> "D"(in_di), \
> "r"(bp) : \
> @@ -157,13 +158,13 @@
> * just pushed it.
> */
> #define VMW_PORT_HB_OUT(cmd, in_ecx, in_si, in_di, \
> - port_num, magic, bp, \
> + flags, magic, bp, \
> eax, ebx, ecx, edx, si, di) \
> ({ \
> asm volatile ("push %12;" \
> "push %%ebp;" \
> "mov 0x04(%%esp), %%ebp;" \
> - "rep outsb;" \
> + VMWARE_HYPERCALL_HB_OUT \
> "pop %%ebp;" \
> "add $0x04, %%esp;" : \
> "=a"(eax), \
> @@ -175,7 +176,7 @@
> "a"(magic), \
> "b"(cmd), \
> "c"(in_ecx), \
> - "d"(port_num), \
> + "d"(flags), \
> "S"(in_si), \
> "D"(in_di), \
> "m"(bp) : \
> @@ -184,13 +185,13 @@
>
>
> #define VMW_PORT_HB_IN(cmd, in_ecx, in_si, in_di, \
> - port_num, magic, bp, \
> + flags, magic, bp, \
> eax, ebx, ecx, edx, si, di) \
> ({ \
> asm volatile ("push %12;" \
> "push %%ebp;" \
> "mov 0x04(%%esp), %%ebp;" \
> - "rep insb;" \
> + VMWARE_HYPERCALL_HB_IN \
> "pop %%ebp;" \
> "add $0x04, %%esp;" : \
> "=a"(eax), \
> @@ -202,7 +203,7 @@
> "a"(magic), \
> "b"(cmd), \
> "c"(in_ecx), \
> - "d"(port_num), \
> + "d"(flags), \
> "S"(in_si), \
> "D"(in_di), \
> "m"(bp) : \
> --
> 2.20.1
>
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> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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