cachepc

Prime+Probe cache-based side-channel attack on AMD SEV-SNP protected virtual machines
git clone https://git.sinitax.com/sinitax/cachepc
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commit e4762c2cdefacf13d26967b7e5f0735c2748026b
parent 501c6bcf4513d40a53022dc93d4156402d43670b
Author: Louis Burda <quent.burda@gmail.com>
Date:   Tue, 24 Jan 2023 14:25:08 +0100

Test page tracking with potential branch prediction in guest

Diffstat:

Mtest/kvm-pagestep_guest.S | 10++++++++++


1 file changed, 10 insertions(+), 0 deletions(-)

diff --git a/test/kvm-pagestep_guest.S b/test/kvm-pagestep_guest.S
@@ -13,6 +13,16 @@ guest_start:
 	nop
 .endr
 
+	mov $0x01, %bx
+	cmp $0x00, %bx
+
+	# NOTE: this needs to be a relative jmp
+	je skip
+.rept L1_LINESIZE * L1_SETS * 2
+	nop
+.endr
+skip:
+
 	mov $0x00, %ax
 	jmp *%ax
 guest_stop: