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Date: Fri, 27 Jan 2023 02:52:37 +0000
From: Jarkko Sakkinen <jarkko@...fian.com>
To: Sean Christopherson <seanjc@...gle.com>,
Paolo Bonzini <pbonzini@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
"H. Peter Anvin" <hpa@...or.com>,
Brijesh Singh <brijesh.singh@....com>,
Tom Lendacky <thomas.lendacky@....com>,
John Allen <john.allen@....com>,
Herbert Xu <herbert@...dor.apana.org.au>,
"David S. Miller" <davem@...emloft.net>
Cc: Harald Hoyer <harald@...fian.com>, Tom Dohrmann <erbse.13@....de>,
Ashish Kalra <ashish.kalra@....com>,
Michael Roth <michael.roth@....com>,
Jarkko Sakkinen <jarkko@...fian.com>,
Dionna Glaze <dionnaglaze@...gle.com>,
Jarkko Sakkinen <jarkko@...nel.org>,
kvm@...r.kernel.org (open list:KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)),
linux-kernel@...r.kernel.org (open list:X86 ARCHITECTURE (32-BIT AND
64-BIT)),
linux-crypto@...r.kernel.org (open list:AMD CRYPTOGRAPHIC COPROCESSOR
(CCP) DRIVER - SE...)
Subject: [PATCH RFC 8/8] crypto: ccp: Move __sev_snp_init_locked() call inside __sev_platform_init_locked()
The following functions end up calling sev_platform_init() or
__sev_platform_init_locked():
* sev_guest_init()
* sev_ioctl_do_pek_csr
* sev_ioctl_do_pdh_export()
* sev_ioctl_do_pek_import()
* sev_ioctl_do_pek_pdh_gen()
* sev_pci_init()
Only sev_guest_init() and sev_pci_init() also call sev_snp_init().
Address this by calling __sev_snp_init_locked() inside
__sev_platform_init_locked() before any other initialization.
Signed-off-by: Jarkko Sakkinen <jarkko@...fian.com>
---
arch/x86/kvm/svm/sev.c | 4 +--
drivers/crypto/ccp/sev-dev.c | 51 +++++++++++++-----------------------
include/linux/psp-sev.h | 15 -----------
3 files changed, 19 insertions(+), 51 deletions(-)
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 5e4666b79689..2dd56f59fc50 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -343,11 +343,9 @@ static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
goto e_free;
mutex_init(&sev->guest_req_lock);
- ret = sev_snp_init(&argp->error, false);
- } else {
- ret = sev_platform_init(&argp->error);
}
+ ret = sev_platform_init(&argp->error);
if (ret)
goto e_free;
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index 50e73df966ec..be040926f66a 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -102,6 +102,7 @@ struct sev_data_range_list *snp_range_list;
static size_t sev_es_tmr_size = SEV_ES_TMR_SIZE;
static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret);
+static int __sev_snp_init_locked(int *error);
static inline bool sev_version_greater_or_equal(u8 maj, u8 min)
{
@@ -965,7 +966,8 @@ static int __sev_platform_init_locked(int *error)
{
struct psp_device *psp = psp_master;
struct sev_device *sev;
- int rc = 0, psp_ret = -1;
+ int psp_ret = -1;
+ int rc;
int (*init_function)(int *error);
if (!psp || !psp->sev_data)
@@ -976,6 +978,18 @@ static int __sev_platform_init_locked(int *error)
if (sev->state == SEV_STATE_INIT)
return 0;
+ rc = __sev_snp_init_locked(error);
+ if (rc < 0 && rc != -ENODEV)
+ return rc;
+
+ if (!sev_es_tmr) {
+ /* Obtain the TMR memory area for SEV-ES use */
+ sev_es_tmr = sev_fw_alloc(sev_es_tmr_size);
+ if (!sev_es_tmr)
+ dev_warn(sev->dev,
+ "SEV: TMR allocation failed, SEV-ES support unavailable\n");
+ }
+
if (sev_init_ex_buffer) {
init_function = __sev_init_ex_locked;
rc = sev_read_init_ex_file();
@@ -1373,6 +1387,9 @@ static int __sev_snp_init_locked(int *error)
struct sev_device *sev;
int rc = 0;
+ if (!cpu_feature_enabled(X86_FEATURE_SEV_SNP))
+ return -ENODEV;
+
if (!psp || !psp->sev_data)
return -ENODEV;
@@ -1457,24 +1474,6 @@ static int __sev_snp_init_locked(int *error)
return rc;
}
-int sev_snp_init(int *error, bool init_on_probe)
-{
- int rc;
-
- if (!cpu_feature_enabled(X86_FEATURE_SEV_SNP))
- return -ENODEV;
-
- if (init_on_probe && !psp_init_on_probe)
- return 0;
-
- mutex_lock(&sev_cmd_mutex);
- rc = __sev_snp_init_locked(error);
- mutex_unlock(&sev_cmd_mutex);
-
- return rc;
-}
-EXPORT_SYMBOL_GPL(sev_snp_init);
-
static int __sev_snp_shutdown_locked(int *error)
{
struct sev_device *sev = psp_master->sev_data;
@@ -2319,14 +2318,6 @@ void sev_pci_init(void)
}
}
- rc = sev_snp_init(&error, true);
- if (rc)
- /*
- * Don't abort the probe if SNP INIT failed,
- * continue to initialize the legacy SEV firmware.
- */
- dev_err(sev->dev, "SEV-SNP: failed to INIT error %#x\n", error);
-
/*
* If boot CPU supports SNP, then first attempt to initialize
* the SNP firmware.
@@ -2341,12 +2332,6 @@ void sev_pci_init(void)
}
}
- /* Obtain the TMR memory area for SEV-ES use */
- sev_es_tmr = sev_fw_alloc(sev_es_tmr_size);
- if (!sev_es_tmr)
- dev_warn(sev->dev,
- "SEV: TMR allocation failed, SEV-ES support unavailable\n");
-
if (!psp_init_on_probe)
return;
diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h
index 970a9de0ed20..ef0c6941a8f4 100644
--- a/include/linux/psp-sev.h
+++ b/include/linux/psp-sev.h
@@ -794,21 +794,6 @@ struct sev_data_snp_shutdown_ex {
*/
int sev_platform_init(int *error);
-/**
- * sev_snp_init - perform SEV SNP_INIT command
- *
- * @error: SEV command return code
- * @init_on_probe: indicates if called during module probe/init
- *
- * Returns:
- * 0 if the SEV successfully processed the command
- * -%ENODEV if the SEV device is not available
- * -%ENOTSUPP if the SEV does not support SEV
- * -%ETIMEDOUT if the SEV command timed out
- * -%EIO if the SEV returned a non-zero return code
- */
-int sev_snp_init(int *error, bool init_on_probe);
-
/**
* sev_platform_status - perform SEV PLATFORM_STATUS command
*
--
2.38.1
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