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[Qemu-devel] [PATCH v7 20/26] hw: i386: set ram_debug_ops when memory en
From: |
Brijesh Singh |
Subject: |
[Qemu-devel] [PATCH v7 20/26] hw: i386: set ram_debug_ops when memory encryption is enabled |
Date: |
Wed, 7 Feb 2018 10:06:32 -0600 |
When memory encryption is enabled, the guest RAM and boot flash ROM will
contain the encrypted data. By setting the debug ops allow us to invoke
encryption APIs when accessing the memory for the debug purposes.
Cc: Paolo Bonzini <address@hidden>
Cc: Richard Henderson <address@hidden>
Cc: Eduardo Habkost <address@hidden>
Cc: "Michael S. Tsirkin" <address@hidden>
Signed-off-by: Brijesh Singh <address@hidden>
---
hw/i386/pc.c | 9 +++++++++
hw/i386/pc_sysfw.c | 6 ++++++
2 files changed, 15 insertions(+)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index ccc50baa85e0..ba451c0dc520 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1357,6 +1357,15 @@ void pc_memory_init(PCMachineState *pcms,
e820_add_entry(0x100000000ULL, pcms->above_4g_mem_size, E820_RAM);
}
+ /*
+ * When memory encryption is enabled, the guest RAM will be encrypted with
+ * a guest unique key. Set the debug ops so that any debug access to the
+ * guest RAM will go through the memory encryption APIs.
+ */
+ if (kvm_memcrypt_enabled()) {
+ kvm_memcrypt_set_debug_ops(ram);
+ }
+
if (!pcmc->has_reserved_memory &&
(machine->ram_slots ||
(machine->maxram_size > machine->ram_size))) {
diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c
index 8ddbbf74d330..3d149b1c9f3c 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -180,6 +180,12 @@ static void pc_system_flash_init(MemoryRegion *rom_memory)
error_report("failed to encrypt pflash rom");
exit(1);
}
+
+ /*
+ * The pflash ROM is encrypted, set the debug ops so that any
+ * debug accesses will use memory encryption APIs.
+ */
+ kvm_memcrypt_set_debug_ops(flash_mem);
}
}
}
--
2.14.3
- [Qemu-devel] [PATCH v7 13/26] qmp: add query-sev command, (continued)
- [Qemu-devel] [PATCH v7 13/26] qmp: add query-sev command, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 14/26] hmp: add 'info sev' command, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 17/26] target/i386: encrypt bios rom, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 19/26] sev: Finalize the SEV guest launch flow, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 22/26] target/i386: clear C-bit when walking SEV guest page table, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 16/26] sev: add command to encrypt guest memory region, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 15/26] sev: add command to create launch memory encryption context, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 18/26] sev: add support to LAUNCH_MEASURE command, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 20/26] hw: i386: set ram_debug_ops when memory encryption is enabled,
Brijesh Singh <=
- [Qemu-devel] [PATCH v7 12/26] kvm: introduce memory encryption APIs, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 21/26] sev: add debug encrypt and decrypt commands, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 23/26] include: add psp-sev.h header file, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 25/26] sev: add support to KVM_SEV_GUEST_STATUS, Brijesh Singh, 2018/02/07
- [Qemu-devel] [PATCH v7 26/26] qmp: add query-sev-launch-measure command, Brijesh Singh, 2018/02/07