From: Tom Lendacky <thomas.lendacky@amd.com>
To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
Sean Christopherson <sean.j.christopherson@intel.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Brijesh Singh <brijesh.singh@amd.com>
Subject: [PATCH v3 02/34] KVM: SVM: Remove the call to sev_platform_status() during setup
Date: Mon, 9 Nov 2020 16:25:28 -0600 [thread overview]
Message-ID: <1b420ccfe763099dee756e935ce3909cee11d141.1604960760.git.thomas.lendacky@amd.com> (raw)
In-Reply-To: <cover.1604960760.git.thomas.lendacky@amd.com>
From: Tom Lendacky <thomas.lendacky@amd.com>
When both KVM support and the CCP driver are built into the kernel instead
of as modules, KVM initialization can happen before CCP initialization. As
a result, sev_platform_status() will return a failure when it is called
from sev_hardware_setup(), when this isn't really an error condition.
Since sev_platform_status() doesn't need to be called at this time anyway,
remove the invocation from sev_hardware_setup().
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
arch/x86/kvm/svm/sev.c | 22 +---------------------
1 file changed, 1 insertion(+), 21 deletions(-)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index c0b14106258a..a4ba5476bf42 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -1127,9 +1127,6 @@ void sev_vm_destroy(struct kvm *kvm)
int __init sev_hardware_setup(void)
{
- struct sev_user_data_status *status;
- int rc;
-
/* Maximum number of encrypted guests supported simultaneously */
max_sev_asid = cpuid_ecx(0x8000001F);
@@ -1148,26 +1145,9 @@ int __init sev_hardware_setup(void)
if (!sev_reclaim_asid_bitmap)
return 1;
- status = kmalloc(sizeof(*status), GFP_KERNEL);
- if (!status)
- return 1;
-
- /*
- * Check SEV platform status.
- *
- * PLATFORM_STATUS can be called in any state, if we failed to query
- * the PLATFORM status then either PSP firmware does not support SEV
- * feature or SEV firmware is dead.
- */
- rc = sev_platform_status(status, NULL);
- if (rc)
- goto err;
-
pr_info("SEV supported\n");
-err:
- kfree(status);
- return rc;
+ return 0;
}
void sev_hardware_teardown(void)
--
2.28.0
next prev parent reply other threads:[~2020-11-09 22:26 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-09 22:25 [PATCH v3 00/34] SEV-ES hypervisor support Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 01/34] x86/cpu: Add VM page flush MSR availablility as a CPUID feature Tom Lendacky
2020-11-09 22:25 ` Tom Lendacky [this message]
2020-11-09 22:25 ` [PATCH v3 03/34] KVM: SVM: Add support for SEV-ES capability in KVM Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 04/34] KVM: SVM: Add GHCB accessor functions for retrieving fields Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 05/34] KVM: SVM: Add support for the SEV-ES VMSA Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 06/34] KVM: x86: Mark GPRs dirty when written Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 07/34] KVM: SVM: Add required changes to support intercepts under SEV-ES Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 08/34] KVM: SVM: Prevent debugging " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 09/34] KVM: SVM: Do not allow instruction emulation " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 10/34] KVM: SVM: Cannot re-initialize the VMCB after shutdown with SEV-ES Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 11/34] KVM: SVM: Prepare for SEV-ES exit handling in the sev.c file Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 12/34] KVM: SVM: Add initial support for a VMGEXIT VMEXIT Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 13/34] KVM: SVM: Create trace events for VMGEXIT processing Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 14/34] KVM: SVM: Add support for SEV-ES GHCB MSR protocol function 0x002 Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 15/34] KVM: SVM: Add support for SEV-ES GHCB MSR protocol function 0x004 Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 16/34] KVM: SVM: Add support for SEV-ES GHCB MSR protocol function 0x100 Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 17/34] KVM: SVM: Create trace events for VMGEXIT MSR protocol processing Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 18/34] KVM: SVM: Support MMIO for an SEV-ES guest Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 19/34] KVM: SVM: Support string IO operations " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 20/34] KVM: SVM: Add support for EFER write traps " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 21/34] KVM: SVM: Add support for CR0 " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 22/34] KVM: SVM: Add support for CR4 " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 23/34] KVM: SVM: Add support for CR8 " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 24/34] KVM: x86: Update __get_sregs() / __set_sregs() to support SEV-ES Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 25/34] KVM: SVM: Do not report support for SMM for an SEV-ES guest Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 26/34] KVM: SVM: Guest FPU state save/restore not needed for " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 27/34] KVM: SVM: Add support for booting APs for an " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 28/34] KVM: SVM: Add NMI support " Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 29/34] KVM: SVM: Set the encryption mask for the SVM host save area Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 30/34] KVM: SVM: Update ASID allocation to support SEV-ES guests Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 31/34] KVM: SVM: Provide support for SEV-ES vCPU creation/loading Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 32/34] KVM: SVM: Provide support for SEV-ES vCPU loading Tom Lendacky
2020-11-09 22:25 ` [PATCH v3 33/34] KVM: SVM: Provide an updated VMRUN invocation for SEV-ES guests Tom Lendacky
2020-11-09 22:26 ` [PATCH v3 34/34] KVM: SVM: Provide support to launch and run an SEV-ES guest Tom Lendacky
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