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From: Tom Lendacky <thomas.lendacky@amd.com>
To: Nikunj A Dadhania <nikunj@amd.com>,
	linux-kernel@vger.kernel.org, x86@kernel.org,
	kvm@vger.kernel.org
Cc: bp@alien8.de, mingo@redhat.com, tglx@linutronix.de,
	dave.hansen@linux.intel.com, dionnaglaze@google.com,
	pgonda@google.com, seanjc@google.com, pbonzini@redhat.com
Subject: Re: [PATCH v7 03/16] virt: sev-guest: Add SNP guest request structure
Date: Fri, 26 Jan 2024 15:16:17 -0600	[thread overview]
Message-ID: <529ca51b-e698-5aa6-5af7-db2d00880559@amd.com> (raw)
In-Reply-To: <20231220151358.2147066-4-nikunj@amd.com>

On 12/20/23 09:13, Nikunj A Dadhania wrote:
> Add a snp_guest_req structure to simplify the function arguments. The
> structure will be used to call the SNP Guest message request API
> instead of passing a long list of parameters.
> 
> Update snp_issue_guest_request() prototype to include the new guest request
> structure and move the prototype to sev_guest.h.
> 
> Signed-off-by: Nikunj A Dadhania <nikunj@amd.com>
> Tested-by: Peter Gonda <pgonda@google.com>
> ---
>   .../x86/include/asm}/sev-guest.h              |  18 +++
>   arch/x86/include/asm/sev.h                    |   8 --
>   arch/x86/kernel/sev.c                         |  15 ++-
>   drivers/virt/coco/sev-guest/sev-guest.c       | 108 +++++++++++-------
>   4 files changed, 93 insertions(+), 56 deletions(-)
>   rename {drivers/virt/coco/sev-guest => arch/x86/include/asm}/sev-guest.h (78%)
> 
> diff --git a/drivers/virt/coco/sev-guest/sev-guest.h b/arch/x86/include/asm/sev-guest.h
> similarity index 78%
> rename from drivers/virt/coco/sev-guest/sev-guest.h
> rename to arch/x86/include/asm/sev-guest.h
> index ceb798a404d6..27cc15ad6131 100644
> --- a/drivers/virt/coco/sev-guest/sev-guest.h
> +++ b/arch/x86/include/asm/sev-guest.h
> @@ -63,4 +63,22 @@ struct snp_guest_msg {
>   	u8 payload[4000];
>   } __packed;
>   
> +struct snp_guest_req {
> +	void *req_buf;
> +	size_t req_sz;
> +
> +	void *resp_buf;
> +	size_t resp_sz;
> +
> +	void *data;
> +	size_t data_npages;
> +
> +	u64 exit_code;
> +	unsigned int vmpck_id;
> +	u8 msg_version;
> +	u8 msg_type;
> +};
> +
> +int snp_issue_guest_request(struct snp_guest_req *req, struct snp_req_data *input,
> +			    struct snp_guest_request_ioctl *rio);

This seems odd to have in this file. It's arch/x86/kernel/sev.c that 
exports the call and so this should probably stay in 
arch/x86/include/asm/sev.h and put the struct there, too, no?

Thanks,
Tom

>   #endif /* __VIRT_SEVGUEST_H__ */
> diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h
> index 5b4a1ce3d368..78465a8c7dc6 100644
> --- a/arch/x86/include/asm/sev.h
> +++ b/arch/x86/include/asm/sev.h
> @@ -97,8 +97,6 @@ extern bool handle_vc_boot_ghcb(struct pt_regs *regs);
>   struct snp_req_data {
>   	unsigned long req_gpa;
>   	unsigned long resp_gpa;
> -	unsigned long data_gpa;
> -	unsigned int data_npages;
>   };
>   
>   struct sev_guest_platform_data {
> @@ -209,7 +207,6 @@ void snp_set_memory_private(unsigned long vaddr, unsigned long npages);
>   void snp_set_wakeup_secondary_cpu(void);
>   bool snp_init(struct boot_params *bp);
>   void __init __noreturn snp_abort(void);
> -int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, struct snp_guest_request_ioctl *rio);
>   void snp_accept_memory(phys_addr_t start, phys_addr_t end);
>   u64 snp_get_unsupported_features(u64 status);
>   u64 sev_get_status(void);
> @@ -233,11 +230,6 @@ static inline void snp_set_memory_private(unsigned long vaddr, unsigned long npa
>   static inline void snp_set_wakeup_secondary_cpu(void) { }
>   static inline bool snp_init(struct boot_params *bp) { return false; }
>   static inline void snp_abort(void) { }
> -static inline int snp_issue_guest_request(u64 exit_code, struct snp_req_data *input, struct snp_guest_request_ioctl *rio)
> -{
> -	return -ENOTTY;
> -}
> -
>   static inline void snp_accept_memory(phys_addr_t start, phys_addr_t end) { }
>   static inline u64 snp_get_unsupported_features(u64 status) { return 0; }
>   static inline u64 sev_get_status(void) { return 0; }

  parent reply	other threads:[~2024-01-26 21:16 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-12-20 15:13 [PATCH v7 00/16] Add Secure TSC support for SNP guests Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 01/16] virt: sev-guest: Use AES GCM crypto library Nikunj A Dadhania
2024-01-25 10:36   ` Borislav Petkov
2024-01-27  3:54     ` Nikunj A. Dadhania
2023-12-20 15:13 ` [PATCH v7 02/16] virt: sev-guest: Replace dev_dbg with pr_debug Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 03/16] virt: sev-guest: Add SNP guest request structure Nikunj A Dadhania
2024-01-25 11:59   ` Borislav Petkov
2024-01-27  4:01     ` Nikunj A. Dadhania
2024-01-31 13:58     ` Nikunj A. Dadhania
2024-02-01 10:29       ` Borislav Petkov
2024-02-01 11:10         ` Nikunj A. Dadhania
2024-02-01 14:07           ` Borislav Petkov
2024-02-02  3:50             ` Nikunj A. Dadhania
2024-02-02 16:14               ` Borislav Petkov
2024-02-05  9:23                 ` Nikunj A. Dadhania
2024-02-06 10:04                   ` Borislav Petkov
2024-01-26 21:16   ` Tom Lendacky [this message]
2024-01-27  4:05     ` Nikunj A. Dadhania
2023-12-20 15:13 ` [PATCH v7 04/16] virt: sev-guest: Add vmpck_id to snp_guest_dev struct Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 05/16] x86/sev: Cache the secrets page address Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 06/16] virt: sev-guest: Move SNP Guest command mutex Nikunj A Dadhania
2024-01-26 22:11   ` Tom Lendacky
2024-01-27  4:06     ` Nikunj A. Dadhania
2023-12-20 15:13 ` [PATCH v7 07/16] x86/sev: Move and reorganize sev guest request api Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 08/16] x86/mm: Add generic guest initialization hook Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 09/16] x86/cpufeatures: Add synthetic Secure TSC bit Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 10/16] x86/sev: Add Secure TSC support for SNP guests Nikunj A Dadhania
2024-02-01 15:46   ` Paolo Bonzini
2024-02-01 15:48     ` Paolo Bonzini
2023-12-20 15:13 ` [PATCH v7 11/16] x86/sev: Change TSC MSR behavior for Secure TSC enabled guests Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 12/16] x86/sev: Prevent RDTSC/RDTSCP interception " Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 13/16] x86/kvmclock: Skip kvmclock when Secure TSC is available Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 14/16] x86/sev: Mark Secure TSC as reliable Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 15/16] x86/cpu/amd: Do not print FW_BUG for Secure TSC Nikunj A Dadhania
2023-12-20 15:13 ` [PATCH v7 16/16] x86/sev: Enable Secure TSC for SNP guests Nikunj A Dadhania
2024-01-25  6:08 ` [PATCH v7 00/16] Add Secure TSC support " Nikunj A. Dadhania
2024-01-26  1:00   ` Dionna Amalie Glaze
2024-01-27  4:10     ` Nikunj A. Dadhania

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