From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id B6E7A4E5323; Fri, 18 Sep 2026 11:57:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789732672; cv=none; b=E32M5hJtH53kYyuQ5IdDRZxjdaVkcUTM1Oxer0gM4KI7H0Mtyota66GarKGk7G1ghYG5muJbtUM2nQ2NkS6vYBl1xWwq7vkN4+hF2GUHxZwKYBYngyS+m0fPKgdrCq8+mBRQSan1LksM2treDOz0n3ilxvyG1rtIRCdGSnyx1eo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789732672; c=relaxed/simple; bh=a1xZzLn3zdkjjhgieqg7txyjVX2v4LU2ITbeQa3SADo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QesmzbMV4D4GoeIxVoKV+DlFACPqu/NCezhFhbqxLhS7fKodBIG9WsKrmGqzFTUjvRXdYAtGL2DB4RugHtmdxvbHJOA1GzFI45qlqFUdUhKHwNxCAOpW6JmnV7qfz/C9K1V8pGKHA+8AM8EDzShtaEeUHK2rHz/jg31eh+dLz00= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=HwdGhrhL; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="HwdGhrhL" Received: from weh-cvm-dev-vm.y50bckvjo0hefgfnzfztsfttff.phxx.internal.cloudapp.net (unknown [20.169.55.37]) by linux.microsoft.com (Postfix) with ESMTPSA id 7614820B7166; Fri, 18 Sep 2026 04:57:04 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 7614820B7166 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1789732624; bh=FFvNQUMvFxVtQSReNycbADifhq8DUGSqWOOlfKSkobQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HwdGhrhLjnq6ZwBt7GPwZ6wSjvIN4+m6ZJgS12xtfMNPv798ZyTOcHsc1u3IUOBo/ uHSFEmt5LNSflVC5hx6uDUTq+VFzWNsgKdPHa2nofern97lCpZNLS1WaugbNFld4o9 qIGk0dgwp6Wk95Yp30FRXz+9GCu9ONc8RfNHwkvI= From: Wei Hu To: linux-hyperv@vger.kernel.org Cc: linux-kernel@vger.kernel.org, "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li Subject: [PATCH v6 4/9] mshv: add SEV-SNP PSP request hypercall Date: Fri, 18 Sep 2026 11:57:16 +0000 Message-ID: <20260918115741.3791682-5-weh@linux.microsoft.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260918115741.3791682-1-weh@linux.microsoft.com> References: <20260908121403.1160280-1-weh@linux.microsoft.com> <20260918115741.3791682-1-weh@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Wei Liu Add a helper for HVCALL_ISSUE_SNP_PSP_GUEST_REQUEST so MSHV can issue asynchronous PSP guest requests on behalf of encrypted partitions. Signed-off-by: Wei Liu --- drivers/hv/mshv_root.h | 8 +++++++ drivers/hv/mshv_root_hv_call.c | 41 ++++++++++++++++++++++++++++++++++ 2 files changed, 49 insertions(+) diff --git a/drivers/hv/mshv_root.h b/drivers/hv/mshv_root.h index d0770d36defb..fdee3629eb0a 100644 --- a/drivers/hv/mshv_root.h +++ b/drivers/hv/mshv_root.h @@ -388,4 +388,12 @@ bool mshv_region_handle_gfn_fault(struct mshv_mem_region *region, u64 gfn); void mshv_region_movable_fini(struct mshv_mem_region *region); bool mshv_region_movable_init(struct mshv_mem_region *region); +#ifdef HV_SUPPORTS_SEV_SNP_GUESTS +int hv_call_issue_psp_guest_request(u64 partition_id, u64 req_pfn, + u64 rsp_pfn, + void (*completion_handler)(void *data, + u64 *status), + void *completion_data); +#endif + #endif /* _MSHV_ROOT_H_ */ diff --git a/drivers/hv/mshv_root_hv_call.c b/drivers/hv/mshv_root_hv_call.c index 1fa644e0e437..fca2419df397 100644 --- a/drivers/hv/mshv_root_hv_call.c +++ b/drivers/hv/mshv_root_hv_call.c @@ -1040,6 +1040,47 @@ int hv_unmap_stats_page(enum hv_stats_object_type type, return ret; } +#ifdef HV_SUPPORTS_SEV_SNP_GUESTS +int hv_call_issue_psp_guest_request(u64 partition_id, u64 req_pfn, + u64 rsp_pfn, + void (*completion_handler)(void *data, + u64 *status), + void *completion_data) +{ + struct hv_input_issue_psp_guest_request *input; + unsigned long flags; + u64 status; + + if (!completion_handler) { + pr_err("%s: missing completion handler\n", __func__); + return -EINVAL; + } + + local_irq_save(flags); + input = *this_cpu_ptr(hyperv_pcpu_input_arg); + memset(input, 0, sizeof(*input)); + input->partition_id = partition_id; + input->request_page = req_pfn; + input->response_page = rsp_pfn; + status = hv_do_hypercall(HVCALL_ISSUE_SNP_PSP_GUEST_REQUEST, input, + NULL); + local_irq_restore(flags); + + /* Hyper-V consumes the input before returning CALL_PENDING. */ + if (hv_result(status) == HV_STATUS_CALL_PENDING) + completion_handler(completion_data, &status); + + if (!hv_result_success(status)) { + pr_err_ratelimited("%s: status=%s partition_id=%llu\n", + __func__, hv_result_to_string(status), + partition_id); + return hv_result_to_errno(status); + } + + return 0; +} +#endif + int hv_call_modify_spa_host_access(u64 partition_id, struct page **pages, u64 page_struct_count, u32 host_access, u32 flags, u8 acquire) -- 2.43.0