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[Qemu-devel] [RFC PATCH v2 13/16] sev: add DEBUG_ENCRYPT command
From: |
Brijesh Singh |
Subject: |
[Qemu-devel] [RFC PATCH v2 13/16] sev: add DEBUG_ENCRYPT command |
Date: |
Thu, 22 Sep 2016 10:54:06 -0400 |
User-agent: |
StGit/0.17.1-dirty |
The command is used to encrypt a region of guest memory for debug.
See docs/amd-memory-encryption.txt for command parameters detail
The command will be used by gdbserver when writing the data into guest
memory for debug purposes (e.g setting breakpoint)
A typical usage looks like:
cpu_memory_rw_debug
cpu_physical_memory_rw_debug_internal
sev_debug_encrypt
Signed-off-by: Brijesh Singh <address@hidden>
---
sev.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)
diff --git a/sev.c b/sev.c
index c0f6ae4..8a07c0d 100644
--- a/sev.c
+++ b/sev.c
@@ -1100,18 +1100,38 @@ sev_debug_decrypt(SEVState *s, uint8_t *dst, const
uint8_t *src, uint32_t len)
}
static int
+sev_debug_encrypt(SEVState *s, uint8_t *dst, const uint8_t *src, uint32_t len)
+{
+ int ret;
+ struct kvm_sev_dbg_encrypt *dbg;
+
+ dbg = g_malloc0(sizeof(*dbg));
+ dbg->src_addr = (unsigned long)src;
+ dbg->dst_addr = (unsigned long)dst;
+ dbg->length = len;
+
+ ret = sev_ioctl(KVM_SEV_DBG_ENCRYPT, dbg);
+ DPRINTF("SEV: debug encrypt src %#lx dst %#lx len %#x\n",
+ (unsigned long)src, (unsigned long)dst, len);
+ g_free(dbg);
+
+ return ret;
+}
+
+static int
sev_mem_write(uint8_t *dst, const uint8_t *src, uint32_t len, MemTxAttrs attrs)
{
SEVState *s = kvm_memory_encryption_get_handle();
assert(s != NULL);
+ assert(attrs.debug || s->state != SEV_STATE_RUNNING);
if (s->state == SEV_STATE_LAUNCHING) {
memcpy(dst, src, len);
return sev_launch_update(s, dst, len);
}
- return 0;
+ return sev_debug_encrypt(s, dst, src, len);
}
static int
- Re: [Qemu-devel] [RFC PATCH v2 06/16] sev: add Secure Encrypted Virtulization (SEV) support, (continued)
Re: [Qemu-devel] [RFC PATCH v2 06/16] sev: add Secure Encrypted Virtulization (SEV) support, Michael S. Tsirkin, 2016/09/22
[Qemu-devel] [RFC PATCH v2 07/16] hmp: display memory encryption support in 'info kvm', Brijesh Singh, 2016/09/22
[Qemu-devel] [RFC PATCH v2 08/16] core: loader: create memory encryption context before copying data, Brijesh Singh, 2016/09/22
[Qemu-devel] [RFC PATCH v2 09/16] sev: add LAUNCH_START command, Brijesh Singh, 2016/09/22
[Qemu-devel] [RFC PATCH v2 10/16] sev: add LAUNCH_UPDATE command, Brijesh Singh, 2016/09/22
[Qemu-devel] [RFC PATCH v2 11/16] sev: add LAUNCH_FINISH command, Brijesh Singh, 2016/09/22
[Qemu-devel] [RFC PATCH v2 12/16] sev: add DEBUG_DECRYPT command, Brijesh Singh, 2016/09/22
[Qemu-devel] [RFC PATCH v2 13/16] sev: add DEBUG_ENCRYPT command,
Brijesh Singh <=
[Qemu-devel] [RFC PATCH v2 14/16] i386: set memory encryption ops for PC.BIOS and PC.RAM regions, Brijesh Singh, 2016/09/22
[Qemu-devel] [RFC PATCH v2 15/16] target-i386: add cpuid Fn8000_001f, Brijesh Singh, 2016/09/22
[Qemu-devel] [RFC PATCH v2 16/16] i386: clear C-bit in SEV guest page table walk, Brijesh Singh, 2016/09/22
Re: [Qemu-devel] [RFC PATCH v2 00/16] x86: Secure Encrypted Virtualization (AMD), no-reply, 2016/09/22
Re: [Qemu-devel] [RFC PATCH v2 00/16] x86: Secure Encrypted Virtualization (AMD), no-reply, 2016/09/22