Drop the sev_enabled flag and switch its one user over to sev_active().
sev_enabled was made redundant with the introduction of sev_status in
commit
b57de6cd1639 ("x86/sev-es: Add SEV-ES Feature Detection").
sev_enabled and sev_active() are guaranteed to be equivalent, as each is
true iff 'sev_status & MSR_AMD64_SEV_ENABLED' is true, and are only ever
written in tandem (ignoring compressed boot's version of sev_status).
Removing sev_enabled avoids confusion over whether it refers to the guest
or the host, and will also allow KVM to usurp "sev_enabled" for its own
purposes.
No functional change intended.
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <
20210422021125.3417167-7-seanjc@google.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
extern u64 sme_me_mask;
extern u64 sev_status;
-extern bool sev_enabled;
void sme_encrypt_execute(unsigned long encrypted_kernel_vaddr,
unsigned long decrypted_kernel_vaddr,
DEFINE_STATIC_KEY_FALSE(sev_enable_key);
EXPORT_SYMBOL_GPL(sev_enable_key);
-bool sev_enabled __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);
* up under SME the trampoline area cannot be encrypted, whereas under SEV
* the trampoline area must be encrypted.
*/
-bool sme_active(void)
+bool sev_active(void)
{
- return sme_me_mask && !sev_enabled;
+ return sev_status & MSR_AMD64_SEV_ENABLED;
}
-bool sev_active(void)
+bool sme_active(void)
{
- return sev_status & MSR_AMD64_SEV_ENABLED;
+ return sme_me_mask && !sev_active();
}
EXPORT_SYMBOL_GPL(sev_active);
/* SEV state cannot be controlled by a command line option */
sme_me_mask = me_mask;
- sev_enabled = true;
physical_mask &= ~sme_me_mask;
return;
}