linux-kernel - Re: [PATCH Part1 RFC v3 01/22] x86/sev: shorten GHCB terminate macro names

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Message-ID: <YL+S0r0pgS5wNAJK@dt>
Date:   Tue, 8 Jun 2021 10:54:58 -0500
From:   Venu Busireddy <venu.busireddy@...cle.com>
To:     Brijesh Singh <brijesh.singh@....com>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        linux-efi@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        linux-coco@...ts.linux.dev, linux-mm@...ck.org,
        linux-crypto@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Joerg Roedel <jroedel@...e.de>,
        Tom Lendacky <thomas.lendacky@....com>,
        "H. Peter Anvin" <hpa@...or.com>, Ard Biesheuvel <ardb@...nel.org>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Sergio Lopez <slp@...hat.com>, Peter Gonda <pgonda@...gle.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        David Rientjes <rientjes@...gle.com>, tony.luck@...el.com,
        npmccallum@...hat.com
Subject: Re: [PATCH Part1 RFC v3 01/22] x86/sev: shorten GHCB terminate macro
 names

On 2021-06-02 09:03:55 -0500, Brijesh Singh wrote:
> Suggested-by: Borislav Petkov <bp@...e.de>
> Signed-off-by: Brijesh Singh <brijesh.singh@....com>

Reviewed-by: Venu Busireddy <venu.busireddy@...cle.com>

> ---
>  arch/x86/boot/compressed/sev.c    | 6 +++---
>  arch/x86/include/asm/sev-common.h | 4 ++--
>  arch/x86/kernel/sev-shared.c      | 2 +-
>  arch/x86/kernel/sev.c             | 4 ++--
>  4 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
> index 670e998fe930..28bcf04c022e 100644
> --- a/arch/x86/boot/compressed/sev.c
> +++ b/arch/x86/boot/compressed/sev.c
> @@ -122,7 +122,7 @@ static enum es_result vc_read_mem(struct es_em_ctxt *ctxt,
>  static bool early_setup_sev_es(void)
>  {
>  	if (!sev_es_negotiate_protocol())
> -		sev_es_terminate(GHCB_SEV_ES_REASON_PROTOCOL_UNSUPPORTED);
> +		sev_es_terminate(GHCB_SEV_ES_PROT_UNSUPPORTED);
>  
>  	if (set_page_decrypted((unsigned long)&boot_ghcb_page))
>  		return false;
> @@ -175,7 +175,7 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long exit_code)
>  	enum es_result result;
>  
>  	if (!boot_ghcb && !early_setup_sev_es())
> -		sev_es_terminate(GHCB_SEV_ES_REASON_GENERAL_REQUEST);
> +		sev_es_terminate(GHCB_SEV_ES_GEN_REQ);
>  
>  	vc_ghcb_invalidate(boot_ghcb);
>  	result = vc_init_em_ctxt(&ctxt, regs, exit_code);
> @@ -202,5 +202,5 @@ void do_boot_stage2_vc(struct pt_regs *regs, unsigned long exit_code)
>  	if (result == ES_OK)
>  		vc_finish_insn(&ctxt);
>  	else if (result != ES_RETRY)
> -		sev_es_terminate(GHCB_SEV_ES_REASON_GENERAL_REQUEST);
> +		sev_es_terminate(GHCB_SEV_ES_GEN_REQ);
>  }
> diff --git a/arch/x86/include/asm/sev-common.h b/arch/x86/include/asm/sev-common.h
> index 629c3df243f0..11b7d9cea775 100644
> --- a/arch/x86/include/asm/sev-common.h
> +++ b/arch/x86/include/asm/sev-common.h
> @@ -54,8 +54,8 @@
>  	(((((u64)reason_set) &  GHCB_MSR_TERM_REASON_SET_MASK) << GHCB_MSR_TERM_REASON_SET_POS) | \
>  	((((u64)reason_val) & GHCB_MSR_TERM_REASON_MASK) << GHCB_MSR_TERM_REASON_POS))
>  
> -#define GHCB_SEV_ES_REASON_GENERAL_REQUEST	0
> -#define GHCB_SEV_ES_REASON_PROTOCOL_UNSUPPORTED	1
> +#define GHCB_SEV_ES_GEN_REQ		0
> +#define GHCB_SEV_ES_PROT_UNSUPPORTED	1
>  
>  #define GHCB_RESP_CODE(v)		((v) & GHCB_MSR_INFO_MASK)
>  
> diff --git a/arch/x86/kernel/sev-shared.c b/arch/x86/kernel/sev-shared.c
> index 6ec8b3bfd76e..14198075ff8b 100644
> --- a/arch/x86/kernel/sev-shared.c
> +++ b/arch/x86/kernel/sev-shared.c
> @@ -207,7 +207,7 @@ void __init do_vc_no_ghcb(struct pt_regs *regs, unsigned long exit_code)
>  
>  fail:
>  	/* Terminate the guest */
> -	sev_es_terminate(GHCB_SEV_ES_REASON_GENERAL_REQUEST);
> +	sev_es_terminate(GHCB_SEV_ES_GEN_REQ);
>  }
>  
>  static enum es_result vc_insn_string_read(struct es_em_ctxt *ctxt,
> diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c
> index 9578c82832aa..460717e3f72d 100644
> --- a/arch/x86/kernel/sev.c
> +++ b/arch/x86/kernel/sev.c
> @@ -1383,7 +1383,7 @@ DEFINE_IDTENTRY_VC_SAFE_STACK(exc_vmm_communication)
>  		show_regs(regs);
>  
>  		/* Ask hypervisor to sev_es_terminate */
> -		sev_es_terminate(GHCB_SEV_ES_REASON_GENERAL_REQUEST);
> +		sev_es_terminate(GHCB_SEV_ES_GEN_REQ);
>  
>  		/* If that fails and we get here - just panic */
>  		panic("Returned from Terminate-Request to Hypervisor\n");
> @@ -1416,7 +1416,7 @@ bool __init handle_vc_boot_ghcb(struct pt_regs *regs)
>  
>  	/* Do initial setup or terminate the guest */
>  	if (unlikely(boot_ghcb == NULL && !sev_es_setup_ghcb()))
> -		sev_es_terminate(GHCB_SEV_ES_REASON_GENERAL_REQUEST);
> +		sev_es_terminate(GHCB_SEV_ES_GEN_REQ);
>  
>  	vc_ghcb_invalidate(boot_ghcb);
>  
> -- 
> 2.17.1
>