From: Tianyu Lan <tiala@xxxxxxxxxxxxx> The ring buffer is remapped in the hv_ringbuffer_init() and it should be with decrypt flag in order to share it with hypervisor in sev-snp enlightened guest. Signed-off-by: Tianyu Lan <tiala@xxxxxxxxxxxxx> --- drivers/hv/ring_buffer.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c index 59a4aa86d1f3..391995c76be7 100644 --- a/drivers/hv/ring_buffer.c +++ b/drivers/hv/ring_buffer.c @@ -18,6 +18,7 @@ #include <linux/slab.h> #include <linux/prefetch.h> #include <linux/io.h> +#include <linux/set_memory.h> #include <asm/mshyperv.h> #include "hyperv_vmbus.h" @@ -233,14 +234,18 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, ring_info->ring_buffer = (struct hv_ring_buffer *) vmap(pages_wraparound, page_cnt * 2 - 1, VM_MAP, + hv_isolation_type_en_snp() ? + pgprot_decrypted(PAGE_KERNEL_NOENC) : PAGE_KERNEL); + if (hv_isolation_type_en_snp()) + memset(ring_info->ring_buffer, 0x00, page_cnt * PAGE_SIZE); + kfree(pages_wraparound); if (!ring_info->ring_buffer) return -ENOMEM; } - ring_info->ring_buffer->read_index = ring_info->ring_buffer->write_index = 0; -- 2.25.1
