Displaying 5 results from an estimated 5 matches for "es_fetch_insn_byte".
2020 Feb 11
0
[PATCH 38/62] x86/sev-es: Handle instruction fetches from user-space
From: Joerg Roedel <jroedel at suse.de>
When a #VC exception is triggered by user-space the instruction
decoder needs to read the instruction bytes from user addresses.
Enhance es_fetch_insn_byte() to safely fetch kernel and user
instruction bytes.
Signed-off-by: Joerg Roedel <jroedel at suse.de>
---
arch/x86/kernel/sev-es.c | 30 +++++++++++++++++++++++-------
1 file changed, 23 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index 2a...
2020 Feb 11
1
[PATCH 18/62] x86/boot/compressed/64: Setup GHCB Based VC Exception handler
...;
> +
> static inline u64 read_ghcb_msr(void)
> {
> unsigned long low, high;
> @@ -35,8 +39,95 @@ static inline void write_ghcb_msr(u64 val)
> "a"(low), "d" (high) : "memory");
> }
>
> +static enum es_result es_fetch_insn_byte(struct es_em_ctxt *ctxt,
> + unsigned int offset,
> + char *buffer)
> +{
> + char *rip = (char *)ctxt->regs->ip;
> +
> + buffer[offset] = rip[offset];
> +
> + return ES_OK;...
2020 Feb 11
0
[PATCH 18/62] x86/boot/compressed/64: Setup GHCB Based VC Exception handler
...uct ghcb boot_ghcb_page __aligned(PAGE_SIZE);
+struct ghcb *boot_ghcb;
+
static inline u64 read_ghcb_msr(void)
{
unsigned long low, high;
@@ -35,8 +39,95 @@ static inline void write_ghcb_msr(u64 val)
"a"(low), "d" (high) : "memory");
}
+static enum es_result es_fetch_insn_byte(struct es_em_ctxt *ctxt,
+ unsigned int offset,
+ char *buffer)
+{
+ char *rip = (char *)ctxt->regs->ip;
+
+ buffer[offset] = rip[offset];
+
+ return ES_OK;
+}
+
+static enum es_result es_write_mem(struct es_em_ctxt *ctxt,
+ void *dst, char *buf, size_t size)
+{
+ memcpy(dst,...
2020 Feb 11
83
[RFC PATCH 00/62] Linux as SEV-ES Guest Support
Hi,
here is the first public post of the patch-set to enable Linux to run
under SEV-ES enabled hypervisors. The code is mostly feature-complete,
but there are still a couple of bugs to fix. Nevertheless, given the
size of the patch-set, I think it is about time to ask for initial
feedback of the changes that come with it. To better understand the code
here is a quick explanation of SEV-ES first.
2020 Feb 11
83
[RFC PATCH 00/62] Linux as SEV-ES Guest Support
Hi,
here is the first public post of the patch-set to enable Linux to run
under SEV-ES enabled hypervisors. The code is mostly feature-complete,
but there are still a couple of bugs to fix. Nevertheless, given the
size of the patch-set, I think it is about time to ask for initial
feedback of the changes that come with it. To better understand the code
here is a quick explanation of SEV-ES first.