From: Ashish Kalra <Ashish.Kalra@amd.com>
To: pbonzini@redhat.com
Cc: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
rkrcmar@redhat.com, joro@8bytes.org, bp@suse.de,
thomas.lendacky@amd.com, x86@kernel.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, srutherford@google.com,
venu.busireddy@oracle.com, brijesh.singh@amd.com
Subject: [PATCH v9 16/18] KVM: x86: Mark _bss_decrypted section variables as decrypted in page encryption bitmap.
Date: Tue, 8 Dec 2020 22:08:45 +0000 [thread overview]
Message-ID: <45bf5465811db7bb22aff49728adb2b7dcebbcb8.1607460588.git.ashish.kalra@amd.com> (raw)
In-Reply-To: <cover.1607460588.git.ashish.kalra@amd.com>
From: Ashish Kalra <ashish.kalra@amd.com>
Ensure that _bss_decrypted section variables such as hv_clock_boot and
wall_clock are marked as decrypted in the page encryption bitmap if
sev live migration is supported.
Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
---
arch/x86/kernel/kvmclock.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
index aa593743acf6..f80cc637ff2c 100644
--- a/arch/x86/kernel/kvmclock.c
+++ b/arch/x86/kernel/kvmclock.c
@@ -333,6 +333,18 @@ void __init kvmclock_init(void)
pr_info("kvm-clock: Using msrs %x and %x",
msr_kvm_system_time, msr_kvm_wall_clock);
+ if (sev_live_migration_enabled()) {
+ unsigned long nr_pages;
+ /*
+ * sizeof(hv_clock_boot) is already PAGE_SIZE aligned
+ */
+ early_set_mem_enc_dec_hypercall((unsigned long)hv_clock_boot,
+ 1, 0);
+ nr_pages = DIV_ROUND_UP(sizeof(wall_clock), PAGE_SIZE);
+ early_set_mem_enc_dec_hypercall((unsigned long)&wall_clock,
+ nr_pages, 0);
+ }
+
this_cpu_write(hv_clock_per_cpu, &hv_clock_boot[0]);
kvm_register_clock("primary cpu clock");
pvclock_set_pvti_cpu0_va(hv_clock_boot);
--
2.17.1
next prev parent reply other threads:[~2020-12-08 22:10 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-08 22:02 [PATCH v9 00/18] Add AMD SEV guest live migration support Ashish Kalra
2020-12-08 22:03 ` [PATCH v9 01/18] KVM: SVM: Add KVM_SEV SEND_START command Ashish Kalra
2020-12-08 22:04 ` [PATCH v9 02/18] KVM: SVM: Add KVM_SEND_UPDATE_DATA command Ashish Kalra
2020-12-08 22:04 ` [PATCH v9 03/18] KVM: SVM: Add KVM_SEV_SEND_FINISH command Ashish Kalra
2020-12-08 22:05 ` [PATCH v9 04/18] KVM: SVM: Add support for KVM_SEV_RECEIVE_START command Ashish Kalra
2020-12-08 22:05 ` [PATCH v9 05/18] KVM: SVM: Add KVM_SEV_RECEIVE_UPDATE_DATA command Ashish Kalra
2020-12-08 22:05 ` [PATCH v9 06/18] KVM: SVM: Add KVM_SEV_RECEIVE_FINISH command Ashish Kalra
2020-12-08 22:05 ` [PATCH v9 07/18] KVM: x86: Add AMD SEV specific Hypercall3 Ashish Kalra
2020-12-08 22:06 ` [PATCH v9 08/18] KVM: X86: Introduce KVM_HC_PAGE_ENC_STATUS hypercall Ashish Kalra
2020-12-08 22:06 ` [PATCH v9 09/18] KVM: x86: Introduce KVM_GET_PAGE_ENC_BITMAP ioctl Ashish Kalra
2020-12-08 22:06 ` [PATCH v9 10/18] mm: x86: Invoke hypercall when page encryption status is changed Ashish Kalra
2020-12-08 22:07 ` [PATCH v9 11/18] KVM: x86: Introduce KVM_SET_PAGE_ENC_BITMAP ioctl Ashish Kalra
2020-12-08 22:07 ` [PATCH v9 12/18] KVM: SVM: Add support for static allocation of unified Page Encryption Bitmap Ashish Kalra
2020-12-08 22:07 ` [PATCH v9 13/18] KVM: x86: Introduce new KVM_FEATURE_SEV_LIVE_MIGRATION feature & Custom MSR Ashish Kalra
2020-12-08 22:08 ` [PATCH v9 14/18] EFI: Introduce the new AMD Memory Encryption GUID Ashish Kalra
2020-12-08 22:08 ` [PATCH v9 15/18] KVM: x86: Add guest support for detecting and enabling SEV Live Migration feature Ashish Kalra
2020-12-08 22:08 ` Ashish Kalra [this message]
2020-12-08 22:09 ` [PATCH v9 17/18] KVM: x86: Add kexec support for SEV Live Migration Ashish Kalra
2020-12-08 22:09 ` [PATCH v9 18/18] KVM: SVM: Bypass DBG_DECRYPT API calls for unecrypted guest memory Ashish Kalra
2021-01-15 0:31 ` [PATCH v9 00/18] Add AMD SEV guest live migration support Steve Rutherford
2021-01-15 1:16 ` Kalra, Ashish
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