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[PATCH v3 08/10] xen/arm: ffa: move message function into ffa_msg.c

From: Bertrand Marquis <bertrand.marquis@xxxxxxx>

Date: Wed, 27 Nov 2024 17:07:40 +0100

Cc: jens.wiklander@xxxxxxxxxx, Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>

Delivery-date: Wed, 27 Nov 2024 16:08:32 +0000

List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

Move the direct message handling function in its own source file and rename it to have a ffa_ prefix. This is a preparation to add support for indirect messages which will go into this newly created source file. Signed-off-by: Bertrand Marquis <bertrand.marquis@xxxxxxx> Reviewed-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx> --- Changes in v3: - add Jens R-b Changes in v2: - rebase --- xen/arch/arm/tee/Makefile | 1 + xen/arch/arm/tee/ffa.c | 69 +---------------------------- xen/arch/arm/tee/ffa_msg.c | 80 ++++++++++++++++++++++++++++++++++ xen/arch/arm/tee/ffa_private.h | 2 + 4 files changed, 84 insertions(+), 68 deletions(-) create mode 100644 xen/arch/arm/tee/ffa_msg.c diff --git a/xen/arch/arm/tee/Makefile b/xen/arch/arm/tee/Makefile index 7c0f46f7f446..0848c833fec3 100644 --- a/xen/arch/arm/tee/Makefile +++ b/xen/arch/arm/tee/Makefile @@ -3,5 +3,6 @@ obj-$(CONFIG_FFA) += ffa_shm.o obj-$(CONFIG_FFA) += ffa_partinfo.o obj-$(CONFIG_FFA) += ffa_rxtx.o obj-$(CONFIG_FFA) += ffa_notif.o +obj-$(CONFIG_FFA) += ffa_msg.o obj-y += tee.o obj-$(CONFIG_OPTEE) += optee.o diff --git a/xen/arch/arm/tee/ffa.c b/xen/arch/arm/tee/ffa.c index bc2722d53fd7..8488fe6af9c0 100644 --- a/xen/arch/arm/tee/ffa.c +++ b/xen/arch/arm/tee/ffa.c @@ -167,73 +167,6 @@ static void handle_version(struct cpu_user_regs *regs) ffa_set_regs(regs, FFA_MY_VERSION, 0, 0, 0, 0, 0, 0, 0); } -static void handle_msg_send_direct_req(struct cpu_user_regs *regs, uint32_t fid) -{ - struct arm_smccc_1_2_regs arg = { .a0 = fid, }; - struct arm_smccc_1_2_regs resp = { }; - struct domain *d = current->domain; - uint32_t src_dst; - uint64_t mask; - - if ( smccc_is_conv_64(fid) ) - mask = GENMASK_ULL(63, 0); - else - mask = GENMASK_ULL(31, 0); - - if ( !ffa_fw_supports_fid(fid) ) - { - resp.a0 = FFA_ERROR; - resp.a2 = FFA_RET_NOT_SUPPORTED; - goto out; - } - - src_dst = get_user_reg(regs, 1); - if ( (src_dst >> 16) != ffa_get_vm_id(d) ) - { - resp.a0 = FFA_ERROR; - resp.a2 = FFA_RET_INVALID_PARAMETERS; - goto out; - } - - /* we do not support direct messages to VMs */ - if ( !FFA_ID_IS_SECURE(src_dst & GENMASK(15,0)) ) - { - resp.a0 = FFA_ERROR; - resp.a2 = FFA_RET_NOT_SUPPORTED; - goto out; - } - - arg.a1 = src_dst; - arg.a2 = get_user_reg(regs, 2) & mask; - arg.a3 = get_user_reg(regs, 3) & mask; - arg.a4 = get_user_reg(regs, 4) & mask; - arg.a5 = get_user_reg(regs, 5) & mask; - arg.a6 = get_user_reg(regs, 6) & mask; - arg.a7 = get_user_reg(regs, 7) & mask; - - arm_smccc_1_2_smc(&arg, &resp); - switch ( resp.a0 ) - { - case FFA_ERROR: - case FFA_SUCCESS_32: - case FFA_SUCCESS_64: - case FFA_MSG_SEND_DIRECT_RESP_32: - case FFA_MSG_SEND_DIRECT_RESP_64: - break; - default: - /* Bad fid, report back to the caller. */ - memset(&resp, 0, sizeof(resp)); - resp.a0 = FFA_ERROR; - resp.a1 = src_dst; - resp.a2 = FFA_RET_ABORTED; - } - -out: - ffa_set_regs(regs, resp.a0, resp.a1 & mask, resp.a2 & mask, resp.a3 & mask, - resp.a4 & mask, resp.a5 & mask, resp.a6 & mask, - resp.a7 & mask); -} - static void handle_features(struct cpu_user_regs *regs) { struct domain *d = current->domain; @@ -351,7 +284,7 @@ static bool ffa_handle_call(struct cpu_user_regs *regs) break; case FFA_MSG_SEND_DIRECT_REQ_32: case FFA_MSG_SEND_DIRECT_REQ_64: - handle_msg_send_direct_req(regs, fid); + ffa_handle_msg_send_direct_req(regs, fid); return true; case FFA_MEM_SHARE_32: case FFA_MEM_SHARE_64: diff --git a/xen/arch/arm/tee/ffa_msg.c b/xen/arch/arm/tee/ffa_msg.c new file mode 100644 index 000000000000..ae263e54890e --- /dev/null +++ b/xen/arch/arm/tee/ffa_msg.c @@ -0,0 +1,80 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2024 Linaro Limited + */ + +#include <xen/const.h> +#include <xen/sizes.h> +#include <xen/types.h> + +#include <asm/smccc.h> +#include <asm/regs.h> + +#include "ffa_private.h" + +void ffa_handle_msg_send_direct_req(struct cpu_user_regs *regs, uint32_t fid) +{ + struct arm_smccc_1_2_regs arg = { .a0 = fid, }; + struct arm_smccc_1_2_regs resp = { }; + struct domain *d = current->domain; + uint32_t src_dst; + uint64_t mask; + + if ( smccc_is_conv_64(fid) ) + mask = GENMASK_ULL(63, 0); + else + mask = GENMASK_ULL(31, 0); + + if ( !ffa_fw_supports_fid(fid) ) + { + resp.a0 = FFA_ERROR; + resp.a2 = FFA_RET_NOT_SUPPORTED; + goto out; + } + + src_dst = get_user_reg(regs, 1); + if ( (src_dst >> 16) != ffa_get_vm_id(d) ) + { + resp.a0 = FFA_ERROR; + resp.a2 = FFA_RET_INVALID_PARAMETERS; + goto out; + } + + /* we do not support direct messages to VMs */ + if ( !FFA_ID_IS_SECURE(src_dst & GENMASK(15,0)) ) + { + resp.a0 = FFA_ERROR; + resp.a2 = FFA_RET_NOT_SUPPORTED; + goto out; + } + + arg.a1 = src_dst; + arg.a2 = get_user_reg(regs, 2) & mask; + arg.a3 = get_user_reg(regs, 3) & mask; + arg.a4 = get_user_reg(regs, 4) & mask; + arg.a5 = get_user_reg(regs, 5) & mask; + arg.a6 = get_user_reg(regs, 6) & mask; + arg.a7 = get_user_reg(regs, 7) & mask; + + arm_smccc_1_2_smc(&arg, &resp); + switch ( resp.a0 ) + { + case FFA_ERROR: + case FFA_SUCCESS_32: + case FFA_SUCCESS_64: + case FFA_MSG_SEND_DIRECT_RESP_32: + case FFA_MSG_SEND_DIRECT_RESP_64: + break; + default: + /* Bad fid, report back to the caller. */ + memset(&resp, 0, sizeof(resp)); + resp.a0 = FFA_ERROR; + resp.a1 = src_dst; + resp.a2 = FFA_RET_ABORTED; + } + +out: + ffa_set_regs(regs, resp.a0, resp.a1 & mask, resp.a2 & mask, resp.a3 & mask, + resp.a4 & mask, resp.a5 & mask, resp.a6 & mask, + resp.a7 & mask); +} diff --git a/xen/arch/arm/tee/ffa_private.h b/xen/arch/arm/tee/ffa_private.h index 9adfe687c3c9..02162e0ee4c7 100644 --- a/xen/arch/arm/tee/ffa_private.h +++ b/xen/arch/arm/tee/ffa_private.h @@ -360,6 +360,8 @@ void ffa_handle_notification_info_get(struct cpu_user_regs *regs); void ffa_handle_notification_get(struct cpu_user_regs *regs); int ffa_handle_notification_set(struct cpu_user_regs *regs); +void ffa_handle_msg_send_direct_req(struct cpu_user_regs *regs, uint32_t fid); + static inline uint16_t ffa_get_vm_id(const struct domain *d) { /* +1 since 0 is reserved for the hypervisor in FF-A */ -- 2.47.0

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