On 2025/2/9 下午5:47, Huacai Chen wrote:
Hi, Bibo,
On Fri, Feb 7, 2025 at 11:26 AM Bibo Mao <maobibo@xxxxxxxxxxx> wrote:
PRMD and ERA register is only meaningful on the beginning stage
of exception entry, and it can be overwritten for nested irq or
exception.
The code doesn't touch ERA, so ERA in the commit message is a typo?
oh, ERA is redundant here.
Will remove it in next version.
Regards
Bibo Mao
Huacai
When CPU runs in VM mode, interrupt need be enabled on host. And the
mode for host had better be kernel mode rather than random.
Signed-off-by: Bibo Mao <maobibo@xxxxxxxxxxx>
---
arch/loongarch/kvm/switch.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/loongarch/kvm/switch.S b/arch/loongarch/kvm/switch.S
index 0c292f818492..1be185e94807 100644
--- a/arch/loongarch/kvm/switch.S
+++ b/arch/loongarch/kvm/switch.S
@@ -85,7 +85,7 @@
* Guest CRMD comes from separate GCSR_CRMD register
*/
ori t0, zero, CSR_PRMD_PIE
- csrxchg t0, t0, LOONGARCH_CSR_PRMD
+ csrwr t0, LOONGARCH_CSR_PRMD
/* Set PVM bit to setup ertn to guest context */
ori t0, zero, CSR_GSTAT_PVM
--
2.39.3
