{"id":2230487,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2230487/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429190532.26538-12-mohamed@unpredictable.fr/","project":{"id":14,"url":"http://patchwork.ozlabs.org/api/1.1/projects/14/?format=json","name":"QEMU Development","link_name":"qemu-devel","list_id":"qemu-devel.nongnu.org","list_email":"qemu-devel@nongnu.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20260429190532.26538-12-mohamed@unpredictable.fr>","date":"2026-04-29T19:05:28","name":"[v21,11/15] target/arm: hvf: pass through CNTHCTL_EL2 and MDCCINT_EL1","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"c372af22d215f63aeb977260439648276eb33ba2","submitter":{"id":91318,"url":"http://patchwork.ozlabs.org/api/1.1/people/91318/?format=json","name":"Mohamed Mediouni","email":"mohamed@unpredictable.fr"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/qemu-devel/patch/20260429190532.26538-12-mohamed@unpredictable.fr/mbox/","series":[{"id":502138,"url":"http://patchwork.ozlabs.org/api/1.1/series/502138/?format=json","web_url":"http://patchwork.ozlabs.org/project/qemu-devel/list/?series=502138","date":"2026-04-29T19:05:29","name":"HVF: Add support for platform vGIC and nested virtualisation","version":21,"mbox":"http://patchwork.ozlabs.org/series/502138/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2230487/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2230487/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=unpredictable.fr header.i=@unpredictable.fr\n header.a=rsa-sha256 header.s=sig1 header.b=HGz/A+xu;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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helo=outbound.ms.icloud.com","X-Spam_score_int":"-20","X-Spam_score":"-2.1","X-Spam_bar":"--","X-Spam_report":"(-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,\n DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,\n SPF_HELO_PASS=-0.001,\n SPF_PASS=-0.001 autolearn=ham autolearn_force=no","X-Spam_action":"no action","X-BeenThere":"qemu-devel@nongnu.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"qemu development ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"HVF traps accesses to CNTHCTL_EL2. For nested guests, HVF traps accesses to MDCCINT_EL1.\nPass through those accesses to the Hypervisor.framework library.\n\nSigned-off-by: Mohamed Mediouni \n\nReviewed-by: Philippe Mathieu-Daudé \nTested-by: Philippe Mathieu-Daudé \n---\n target/arm/hvf/hvf.c | 20 ++++++++++++++++++++\n 1 file changed, 20 insertions(+)","diff":"diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c\nindex c40327ea2f..ceeb61fbc0 100644\n--- a/target/arm/hvf/hvf.c\n+++ b/target/arm/hvf/hvf.c\n@@ -296,6 +296,10 @@ void hvf_arm_init_debug(void)\n #define SYSREG_DBGWVR15_EL1 SYSREG(2, 0, 0, 15, 6)\n #define SYSREG_DBGWCR15_EL1 SYSREG(2, 0, 0, 15, 7)\n \n+/* EL2 registers */\n+#define SYSREG_CNTHCTL_EL2 SYSREG(3, 4, 14, 1, 0)\n+#define SYSREG_MDCCINT_EL1 SYSREG(2, 0, 0, 2, 0)\n+\n #define WFX_IS_WFE (1 << 0)\n \n #define TMR_CTL_ENABLE (1 << 0)\n@@ -1719,6 +1723,14 @@ static int hvf_sysreg_read(CPUState *cpu, uint32_t reg, uint64_t *val)\n case SYSREG_OSDLR_EL1:\n /* Dummy register */\n return 0;\n+ case SYSREG_CNTHCTL_EL2:\n+ if (__builtin_available(macOS 15.0, *)) {\n+ assert_hvf_ok(hv_vcpu_get_sys_reg(cpu->accel->fd, HV_SYS_REG_CNTHCTL_EL2, val));\n+ }\n+ return 0;\n+ case SYSREG_MDCCINT_EL1:\n+ assert_hvf_ok(hv_vcpu_get_sys_reg(cpu->accel->fd, HV_SYS_REG_MDCCINT_EL1, val));\n+ return 0;\n case SYSREG_ICC_AP0R0_EL1:\n case SYSREG_ICC_AP0R1_EL1:\n case SYSREG_ICC_AP0R2_EL1:\n@@ -2007,6 +2019,14 @@ static int hvf_sysreg_write(CPUState *cpu, uint32_t reg, uint64_t val)\n case SYSREG_OSDLR_EL1:\n /* Dummy register */\n return 0;\n+ case SYSREG_CNTHCTL_EL2:\n+ if (__builtin_available(macOS 15.0, *)) {\n+ assert_hvf_ok(hv_vcpu_set_sys_reg(cpu->accel->fd, HV_SYS_REG_CNTHCTL_EL2, val));\n+ }\n+ return 0;\n+ case SYSREG_MDCCINT_EL1:\n+ assert_hvf_ok(hv_vcpu_set_sys_reg(cpu->accel->fd, HV_SYS_REG_MDCCINT_EL1, val));\n+ return 0;\n case SYSREG_LORC_EL1:\n /* Dummy register */\n return 0;\n","prefixes":["v21","11/15"]}