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Message-ID: <f6ed8566-6521-92f0-927e-1764d8074ce6@amd.com>
Date: Mon, 11 Jan 2021 10:02:38 -0600
From: Tom Lendacky <thomas.lendacky@....com>
To: Sean Christopherson <seanjc@...gle.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Andy Lutomirski <luto@...nel.org>,
Peter Zijlstra <peterz@...radead.org>
Cc: Vitaly Kuznetsov <vkuznets@...hat.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org, Borislav Petkov <bp@...e.de>,
Brijesh Singh <brijesh.singh@....com>
Subject: Re: [PATCH 06/13] x86/sev: Rename global "sev_enabled" flag to
"sev_guest"
On 1/8/21 6:47 PM, Sean Christopherson wrote:
> Use "guest" instead of "enabled" for the global "running as an SEV guest"
> flag to avoid confusion over whether "sev_enabled" refers to the guest or
> the host. This will also allow KVM to usurp "sev_enabled" for its own
> purposes.
>
> No functional change intended.
>
> Signed-off-by: Sean Christopherson <seanjc@...gle.com>
Acked-by: Tom Lendacky <thomas.lendacky@....com>
> ---
> arch/x86/include/asm/mem_encrypt.h | 2 +-
> arch/x86/mm/mem_encrypt.c | 4 ++--
> arch/x86/mm/mem_encrypt_identity.c | 2 +-
> 3 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/arch/x86/include/asm/mem_encrypt.h b/arch/x86/include/asm/mem_encrypt.h
> index 2f62bbdd9d12..9b3990928674 100644
> --- a/arch/x86/include/asm/mem_encrypt.h
> +++ b/arch/x86/include/asm/mem_encrypt.h
> @@ -20,7 +20,7 @@
>
> extern u64 sme_me_mask;
> extern u64 sev_status;
> -extern bool sev_enabled;
> +extern bool sev_guest;
>
> void sme_encrypt_execute(unsigned long encrypted_kernel_vaddr,
> unsigned long decrypted_kernel_vaddr,
> diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
> index bc0833713be9..0f798355de03 100644
> --- a/arch/x86/mm/mem_encrypt.c
> +++ b/arch/x86/mm/mem_encrypt.c
> @@ -44,7 +44,7 @@ EXPORT_SYMBOL(sme_me_mask);
> DEFINE_STATIC_KEY_FALSE(sev_enable_key);
> EXPORT_SYMBOL_GPL(sev_enable_key);
>
> -bool sev_enabled __section(".data");
> +bool sev_guest __section(".data");
>
> /* Buffer used for early in-place encryption by BSP, no locking needed */
> static char sme_early_buffer[PAGE_SIZE] __initdata __aligned(PAGE_SIZE);
> @@ -344,7 +344,7 @@ int __init early_set_memory_encrypted(unsigned long vaddr, unsigned long size)
> */
> bool sme_active(void)
> {
> - return sme_me_mask && !sev_enabled;
> + return sme_me_mask && !sev_guest;
> }
>
> bool sev_active(void)
> diff --git a/arch/x86/mm/mem_encrypt_identity.c b/arch/x86/mm/mem_encrypt_identity.c
> index 6c5eb6f3f14f..91b6b899c02b 100644
> --- a/arch/x86/mm/mem_encrypt_identity.c
> +++ b/arch/x86/mm/mem_encrypt_identity.c
> @@ -545,7 +545,7 @@ void __init sme_enable(struct boot_params *bp)
>
> /* SEV state cannot be controlled by a command line option */
> sme_me_mask = me_mask;
> - sev_enabled = true;
> + sev_guest = true;
> physical_mask &= ~sme_me_mask;
> return;
> }
>
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