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[Qemu-devel] [PATCH v12 20/28] hw/i386: set ram_debug_ops when memory en
From: |
Brijesh Singh |
Subject: |
[Qemu-devel] [PATCH v12 20/28] hw/i386: set ram_debug_ops when memory encryption is enabled |
Date: |
Thu, 8 Mar 2018 06:48:53 -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 35fcb6efdfb9..69364b6856b5 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1360,6 +1360,15 @@ 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 73ac783f2055..845240f97293 100644
--- a/hw/i386/pc_sysfw.c
+++ b/hw/i386/pc_sysfw.c
@@ -181,6 +181,12 @@ 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
- Re: [Qemu-devel] [PATCH v12 10/28] include: add psp-sev.h header file, (continued)
[Qemu-devel] [PATCH v12 12/28] sev/i386: register the guest memory range which may contain encrypted data, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 11/28] sev/i386: add command to initialize the memory encryption context, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 13/28] kvm: introduce memory encryption APIs, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 14/28] hmp: add 'info sev' command, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 15/28] sev/i386: add command to create launch memory encryption context, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 17/28] target/i386: encrypt bios rom, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 18/28] sev/i386: add support to LAUNCH_MEASURE command, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 20/28] hw/i386: set ram_debug_ops when memory encryption is enabled,
Brijesh Singh <=
[Qemu-devel] [PATCH v12 16/28] sev/i386: add command to encrypt guest memory region, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 19/28] sev/i386: finalize the SEV guest launch flow, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 21/28] sev/i386: add debug encrypt and decrypt commands, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 23/28] qmp: add query-sev-launch-measure command, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 22/28] target/i386: clear C-bit when walking SEV guest page table, Brijesh Singh, 2018/03/08
[Qemu-devel] [PATCH v12 24/28] sev/i386: add migration blocker, Brijesh Singh, 2018/03/08