Messages in this thread Patch in this message | | | From | Ashish Kalra <> | Subject | [PATCH v7 17/18] KVM: x86: Mark _bss_decrypted section variables as decrypted in page encryption bitmap. | Date | Thu, 30 Apr 2020 08:47:01 +0000 |
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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 liv 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 34b18f6eeb2c..65777bf1218d 100644 --- a/arch/x86/kernel/kvmclock.c +++ b/arch/x86/kernel/kvmclock.c @@ -334,6 +334,18 @@ 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
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